List
| Obs. code Map | Observatories, programs, surveys, and dedicated telescopes | CTRY | Region | MPC description |
|---|---|---|---|---|
| 000 | Royal Observatory, Greenwich |  | ENG | Greenwich |
| 001 | Isaac Roberts' Observatory | | ENG | Crowborough |
| 002 | Rayleigh Observatory, Chelmsford borough, Essex | | ENG | Rayleigh |
| 003 | Montpellier Observatory (Observatoire de la Babote; Montpellier Babote Observatory) |  | Occ | Montpellier |
| 004 | Toulouse Observatory | | Occ | Toulouse |
| 005 | Paris Observatory (Observatoire de Paris; Observatoire de Paris-Meudon) | | IDF | Meudon |
| 006 | Fabra Observatory (Observatori Fabra) |  | CT | Fabra Observatory, Barcelona |
| 007 | Paris Observatory (Observatoire de Paris; Observatoire de Paris-Meudon) | | IDF | Paris |
| 008 | Algiers Observatory (Centre de Recherche en Astronomie Astrophysique et Géophysique) |  | - | Algiers-Bouzareah |
| 009 | Uecht Observatory (Sternwarte Uecht, Solar Observatory at Uecht) |  | SWG | Bern-Uecht |
| 010 | CERGA Observatory (Centre de recherches en géodynamique et astrométrie) Src | | PACA | Caussols |
| 011 | Wetzikon Observatory (Sternwarte Wetzikon) | | SWG | Wetzikon |
| 012 | Royal Observatory of Belgium (Uccle Observatory; Observatoire Royal de Belgique; Koninklijke Sterrenwacht van België) |  | BCR | Uccle |
| 013 | Leiden Observatory (Sterrewacht Leiden) |  | Zuid Holland | Leiden |
| 014 | Marseille Observatory | | PACA | Marseille |
| 015 | Sonnenborgh Observatory | | Utrecht | Utrecht |
| 016 | Besançon Astronomical Observatory (Observatoire de Besançon) | | BFC | Besançon |
| 017 | Hoher List Observatory (Observatorium Hoher List) |  | RP | Hoher List |
| 018 | Düsseldorf-Bilk Observatory (Sternwarte Bilk) | | NRW | Düsseldorf-Bilk |
| 019 | Neuchâtel Observatory | | SWF | Neuchatel |
| 020 | Nice Observatory (Observatoire de Nice); observer: Matthieu Conjat Src : 21 | | PACA | Nice |
| 021 | Karlsruhe Observatory (Sternwarte Karlsruhe) | | BW | Karlsruhe |
| 022 | Observatory of Turin (Pino Torinese; Osservatorio Astronomico di Torino) |  | P | Pino Torinese |
| 023 | Wiesbaden Observatory (Sternwarte Wiesbaden) | | HE | Wiesbaden |
| 024 | Heidelberg-Königstuhl State Observatory (Heidelberg Observatory; Landessternwarte Heidelberg-Königstuhl) | | BW | Heidelberg-Konigstuhl |
| 025 | Stuttgart Observatory | | BW | Stuttgart |
| 026 | Zimmerwald Observatory (Observatorium Zimmerwald) | | SWG | Bern-Zimmerwald |
| 027 | Brera Astronomical Observatory (Osservatorio Astronomico di Brera) | | Lo | Milan |
| 028 | Würzburg Observatory (Sternwarte der Universität Würzburg) | | FB | Würzburg |
| 029 | Hamburg Observatory (Bergedorf Observatory; Hamburger Sternwarte) | | H | Hamburg-Bergedorf |
| 030 | Arcetri Observatory (Osservatorio Astrofisico di Arcetri) | | Tu | Arcetri Observatory, Florence |
| 031 | Sonneberg Observatory | | TH | Sonneberg |
| 032 | Jena Observatory (Astrophysikalisches Institut und Universitäts-Sternwarte Jena) | | TH | Jena |
| 033 | Karl Schwarzschild Observatory (Karl-Schwarzschild-Observatorium) | | TH | Karl Schwarzschild Observatory, Tautenburg |
| 034 | Monte Mario Observatory (Osservatorio Astronomico di Roma Sede di Monte Mario) | | La | Monte Mario Observatory, Rome |
| 035 | Østervold Observatory (Copenhagen University Observatory; Københavns Universitet Astronomisk Observatorium) |  | - | Copenhagen |
| 036 | Vatican Observatory (Specola Vaticana) |  | - | Castel Gandolfo |
| 037 | Collurania-Teramo Observatory (Osservatorio Astronomico di Collurania-Teramo) | | Ab | Collurania Observatory, Teramo |
| 038 | Astronomical Observatory of Trieste (Osservatorio Astronomico di Trieste) | | F | Trieste |
| 039 | Lund Observatory (Lunds Universitet Institutionen för astronomi) |  | Skåne | Lund |
| 040 | Lohrmann Institute | | SN | Lohrmann Institute, Dresden |
| 041 | Innsbruck Observatory |  | Ty | Innsbruck |
| 042 | Einstein Tower | | BB | Potsdam |
| 043 | Asiago Astrophysical Observatory (Osservatorio Astrofisico di Asiago) | | V | Asiago Astrophysical Observatory, Padua |
| 044 | Astronomical Observatory of Capodimonte (Osservatorio Astronomico di Capodimonte) | | Cam | Capodimonte Observatory, Naples |
| 045 | Vienna Observatory (since 1879) (Universitäts-Sternwarte Wien) | | Vi | Vienna (since 1879) |
| 046 | Kleť Observatory, České Budějovice (Hvězdárna Kleť) |  | JC | Kleť Observatory, České Budějovice |
| 047 | Poznań Observatory (Obserwatorium Astronomiczne Uniwersytet im. Adama Mickiewicza w Poznaniu) |  | WV | Poznań |
| 048 | Hradec Králové Observatory (Hvězdárna Hradec Králové) | | Hradec Králové | Hradec Králové |
| 049 | Kvistaberg Observatory | | Up | Uppsala-Kvistaberg |
| 050 | Stockholm Observatory (before 1931) (Stockholms observatorium) | | Sö | Stockholm (before 1931) |
| 051 | Royal Observatory, Cape of Good Hope |  | WC | Cape |
| 052 | Stockholm Observatory (since 1931) (Saltsjöbaden Observatory) | | Sö | Stockholm-Saltsjobaden |
| 053 | Konkoly Observatory (Konkoly Obszervatórium) |  | Budapest | Konkoly Observatory, Budapest (since 1934) |
| 054 | Brorfelde Observatory (Brorfelde Observatoriet) | | - | Brorfelde |
| 055 | Kraków Observatory | | LPV | Cracow |
| 056 | Skalnaté pleso Observatory (Observatórium Skalnaté pleso) |  | Prešov | Skalnate Pleso |
| 057 | Belgrade Observatory |  | - | Belgrade |
| 058 | Königsberg Observatory (before 1944) |   | Kaliningrad | Kaliningrad |
| 059 | Lomnický štít Observatory (Observatórium Lomnický štít) | | Prešov | Lomnicky Stit |
| 060 | Warsaw University Observatory | | MV | Warsaw-Ostrowik |
| 061 | Uzhhorod Observatory |  | Zakarpattia | Uzhhorod |
| 062 | Iso-Heikkilä Observatory (Turku Observatory; Turun observatorio) |  | SW | Turku |
| 063 | Tuorla Observatory (Turku-Tuorla; Tuorlan observatorio) | | SW | Turku-Tuorla |
| 064 | Kevola Observatory (Turku-Kevola; Kevolan tähtitorni) | | SW | Turku-Kevola |
| 065 | Traunstein Observatory | | FB | Traunstein |
| 066 | National Observatory of Athens |  | - | Athens |
| 067 | Astronomical Observatory of Lviv University | | Lviv | Lviv University Observatory |
| 068 | Lviv Polytechnic Institute | | Lviv | Lviv Polytechnic Institute |
| 069 | Baldone, near Riga |  | - | Baldone |
| 070 | Vilnius Observatory (before 1939) | | Vilnius | Vilnius (before 1939) |
| 071 | Rozhen Observatory or Bulgarian National Astronomical Observatory |  | - | NAO Rozhen, Smolyan |
| 072 | Scheuren Observatory | | NRW | Scheuren Observatory |
| 073 | Bucharest Astronomical Observatory |  | - | Bucharest |
| 074 | Boyden Observatory | | Free State | Boyden Observatory, Bloemfontein |
| 075 | University of Tartu Old Observatory active until 1964 (formerly Dorpat Observatory until 1919; not to be confused with modern Tartu Observatory, see L75) |  | Tartu | Tartu |
| 076 | Johannesburg-Hartbeespoort Observatory (Union Observatory Annex), Hartbeespoort | | North West | Johannesburg-Hartbeespoort |
| 077 | Yale-Columbia Southern Station (1925–1951) Src | | Gauteng | Yale-Columbia Station, Johannesburg |
| 078 | Union Observatory (Johannesburg Observatory; Republic Observatory; Transvaal Observatory) | | Gauteng | Johannesburg |
| 079 | Radcliffe Observatory | | Gauteng | Radcliffe Observatory, Pretoria |
| 080 | Istanbul Observatory |  | - | Istanbul |
| 081 | Leiden Southern Station, Hartbeespoort (Leiden Station, Johannesburg) | | North West | Leiden Station, Johannesburg |
| 082 | St. Pölten Observatory | | LA | St. Polten |
| 083 | Main Astronomical Observatory | | Kyiv | Holosiivskyi District, Kyiv |
| 084 | Pulkovo Observatory | | Saint Petersburg | Pulkovo |
| 085 | Kyiv Observatory | | Kyiv | Kyiv |
| 086 | Odesa Observatory | | - | Odesa |
| 087 | Helwan Observatory |  | - | Helwan |
| 088 | Kottomia Observatory | | - | Kottomia |
| 089 | Mykolaiv Observatory | | Mykolaiv | Mykolaiv |
| 090 | Mainz Observatory | | RP | Mainz |
| 091 | Nurol Observatory (Observatoire de Nurol) | | ARA | Observatoire de Nurol, Aurec sur Loire |
| 092 | Toruń Centre for Astronomy (Piwnice Astronomical Observatory; Piwnice Obserwatorium Astronomiczne) | | KPV | Torun-Piwnice |
| 093 | Skibotn Observatory |  | - | Skibotn |
| 094 | Simeiz Observatory | | - | Crimea-Simeis |
| 095 | 1. Crimean Astrophysical Observatory 2. Crimean Astronomical Station of the Sternberg Astronomical Institute 3. Gennadiy Borisov 's observatory until it received its own code L51 | | - | Crimea-Nauchnij |
| 096 | Merate Observatory | | Lo | Merate |
| 097 | Wise Observatory |  | - | Wise Observatory, Mitzpeh Ramon |
| 098 | Cima Ekar Observing Station (Stazione osservativa di Asiago Cima Ekar; also see #043 and #209) | | V | Asiago Observatory, Cima Ekar |
| 099 | Lahti Ursa Observatory (Lahden Ursan tähtitorni) | | Päijät-Häme | Lahti |
| 100 | Ähtäri Observatory | | South Ostrobothnia | Ahtari |
| 101 | Kharkiv Observatory (Astronomical Observatory of Kharkiv National University, ХАО) | | Kharkiv | Kharkiv |
| 102 | Zvenigorod Observatory | | Moscow | Zvenigorod |
| 103 | Ljubljana Observatory |  | Ljubljana | Ljubljana |
| 104 | Pistoia Mountains Astronomical Observatory (San Marcello Pistoiese; Osservatorio Astronomico della Montagna Pistoiese; Osservatorio di Pian dei Termini, Pian dei Termini Observatory) | | Tu | San Marcello Pistoiese |
| 105 | Moscow Observatory | | Moscow | Moscow |
| 106 | Črni Vrh Observatory (Observatorij Črni Vrh) | | Primorska | Crni Vrh |
| 107 | Cavezzo Observatory, (Osservatorio Astronomico "Geminiamo Montanari") | | ER | Cavezzo |
| 108 | Montelupo Observatory | | Tu | Montelupo |
| 109 | Kouba Observatory | | - | Algiers-Kouba |
| 110 | Rostov Observatory | | Yaroslavl | Rostov |
| 111 | Piazzano Observatory | | Tu | Piazzano Observatory, Florence |
| 112 | Pleiade Observatory | | V | Pleiade Observatory, Verona |
| 113 | Drebach Observatory (Volkssternwarte Drebach), Schönbrunn | | SN | Volkssternwarte Drebach, Schoenbrunn |
| 114 | Zelenchukskaya Station of the Engelhardt Observatory (see #136), Kazan University Observatory | | Karachay-Cherkessia | Engelhardt Observatory, Zelenchukskaya Station |
| 115 | Special Astrophysical Observatory (SAO) (also see #114) | | Karachay-Cherkessia | Zelenchukskaya |
| 116 | Giesing Observatory, München-Giesing | | FB | Giesing |
| 117 | Sendling Observatory, Munich | | FB | Sendling |
| 118 | Modra Observatory (Astronomické observatórium Modra; Astronomical and Geophysical Observatory, Modra) | | Bratislava | Astronomical and Geophysical Observatory, Modra |
| 119 | Abastuman Observatory |  | - | Abastuman |
| 120 | Višnjan Observatory (Zvjezdarnica Višnjan) |  | - | Visnjan |
| 121 | Chuhuiv Observational Station | | Kharkiv | Chuhuiv Raion, Kharkiv Oblast |
| 122 | Pises Observatory (Observatoire des Pises) | | Occ | Pises Observatory |
| 123 | Byurakan Observatory |  | - | Byurakan |
| 124 | Castres Observatory (Observatoire de Castres) | | Occ | Castres |
| 125 | Tbilisi Observatory | | - | Tbilisi |
| 126 | Monte Viseggi Observatory (Osservatorio Astronomico di Monte Viseggi), obs.: Giulio Scarfì | | Li | Monte Viseggi |
| 127 | Bornheim Observatory | | NRW | Bornheim |
| 128 | Saratov Observatory of the Saratov State University | | Saratov | Saratov |
| 129 | Ordubad Observatory |  | - | Ordubad |
| 130 | Lumezzane Observatory (Osservatorio Astronomico Serafino Zani) | | Lo | Lumezzane |
| 131 | Observatoire de l'Ardèche | | ARA | Observatoire de l'Ardeche |
| 132 | Bédoin Observatory (Observatoire de Bédoin); observer: Pierre Antonini | | PACA | Bedoin |
| 133 | Les Tardieux Observatory; observer: Michel Bœuf | | PACA | Les Tardieux |
| 134 | University Observatory Großschwabhausen | | TH | Groszschwabhausen |
| 135 | Kasan Observatory | | Tatarstan | Kasan |
| 136 | Engelhardt Observatory of the Kazan University Observatory | | Tatarstan | Engelhardt Observatory, Kasan |
| 137 | Givatayim Observatory | | - | Givatayim Observatory |
| 138 | Village-Neuf Observatory | | GE | Village-Neuf |
| 139 | Antibes Observatory; observer: Laurent Brunetto [2] | | PACA | Antibes |
| 140 | Augerolles Observatory | | ARA | Augerolles |
| 141 | Hottviller Observatory (Observatoire de Hottviller) | | GE | Hottviller |
| 142 | Sinsen Observatory | | NRW | Sinsen |
| 143 | Gnosca Observatory (Osservatorio Astronomico di Gnosca; observer: Stefano Sposetti) | | SWI | Gnosca |
| 144 | Bray et Lu Observatory | | IDF | Bray et Lu |
| 145 | 's-Gravenwezel Observatory | | VLG | 's-Gravenwezel |
| 146 | Frignano Observatory | | - | Frignano |
| 147 | Suno Observatory (Osservatorio Astronomico di Suno; Osservatorio Astronomico Galileo Galilei) Src | | P | Osservatorio Astronomico di Suno |
| 148 | Guitalens Observatory (Observatoire de Guitalens; observer: Alain Klotz) [2] | | Occ | Guitalens |
| 149 | Beine-Nauroy Observatory | | GE | Beine-Nauroy |
| 150 | Maisons Laffitte Observatory | | IDF | Maisons Laffitte |
| 151 | Eschenberg Observatory (Sternwarte Eschenberg) | | SWG | Eschenberg Observatory, Winterthur |
| 152 | Moletai Astronomical Observatory (MAO) |  | - | Moletai Astronomical Observatory |
| 153 | Stuttgart-Hoffeld Observatory | | BW | Stuttgart-Hoffeld |
| 154 | Cortina Observatory (Associazione Astronomica Cortina; Osservatorio Astronomico del Col Drusciè "Helmut Ullrich"), Cortina d'Ampezzo | | V | Cortina |
| 155 | Ole Rømer Observatory | | - | Ole Romer Observatory, Aarhus |
| 156 | Catania Astrophysical Observatory | | Si | Catania Astrophysical Observatory |
| 157 | Frasso Sabino Observatory (Osservatorio Astronomico Virginio Cesarini – Frasso Sabino) Src | | La | Frasso Sabino |
| 158 | Promiod Observatory (Osservatorio Dalai Lama di Promiod) | | Ao | Promiod |
| 159 | Monte Agliale Observatory (Osservatorio Astronomico di Monte Agliale) | | Tu | Monte Agliale |
| 160 | Castelmartini Observatory (Osservatorio Astronomico di Castelmartini, owner: E. Prosperi) Src | | Tu | Castelmartini |
| 161 | Cerrina Tololo Observatory | | P | Cerrina Tololo Observatory |
| 162 | Potenza Observatory | | B | Potenza |
| 163 | Roeser Observatory |  | - | Roeser Observatory, Luxembourg |
| 164 | St. Michel sur Meurthe Observatory | | GE | St. Michel sur Meurthe |
| 165 | Piera Observatory (Observatori Astronomic de Piera) | | CT | Piera Observatory, Barcelona |
| 166 | Úpice Observatory (Hvězdárna v Úpici) | | Hradec Králové | Úpice |
| 167 | Bülach Observatory (Sternwarte Bülach) | | SWG | Bulach Observatory |
| 168 | Kourovskaya Observatory | | Sverdlovsk | Kourovskaya |
| 169 | Airali Observatory | | P | Airali Observatory |
| 170 | Begues Observatory (Observatorio de Begues) | | CT | Observatorio de Begues |
| 171 | Flarestar Observatory |  | - | Flarestar Observatory, San Gwann |
| 172 | Onnens Observatory | | SWF | Onnens |
| 173 | St Clotilde Observatory (Observatoire Sainte-Clotilde) | | Réunion | St. Clotilde, Reunion |
| 174 | Nyrölä Observatory (Nyrölän observatorio), Jyväskylä | | CF | Nyrola Observatory, Jyvaskyla |
| 175 | Bagnoud Observatory | | SWF | F.-X. Bagnoud Observatory, St-Luc |
| 176 | Consell Observatory (Observatorio Astronómico de Consell) | | IB | Observatorio Astronomico de Consell |
| 177 | Le Cres Observatory, observer: Raymond Poncy [2] | | Occ | Le Cres |
| 178 | Collonges Observatory, observer: Jean-Gabriel Bosch [2] | | ARA | Collonges |
| 179 | Monte Generoso Observatory (Osservatorio del Monte Generoso) | | SWI | Monte Generoso |
| 180 | Mauguio Observatory | | Occ | Mauguio |
| 181 | Makes Observatory (Observatoire des Makes; observers: Jean-Paul Teng, Andre Peyrot, Alain Klotz) [2] | | Réunion | Observatoire des Makes, Saint-Louis |
| 182 | St Paul Observatory | | Réunion | St. Paul, Reunion |
| 183 | Starlab Observatory | | Karachay-Cherkessia | Starlab Observatory, Karachay-Cherkessia |
| 184 | Valmeca Observatory | | PACA | Valmeca Observatory, Puimichel |
| 185 | Jura Observatory (Observatoire astronomique jurassien) | | SWF | Observatoire Astronomique Jurassien-Vicques |
| 186 | Kitab Observatory, Mt. Maydanak |  | Kashkadarya | Kitab |
| 187 | Borowiec Astrogeodynamic Observatory | | WV | Astronomical Observatory, Borowiec |
| 188 | Majdanak Observatory | | Kashkadarya | Majdanak |
| 189 | Geneva Observatory (old observatory; before 1967) | | SWF | Geneva (before 1967) |
| 190 | Gissar Observatory |  | RR | Gissar |
| 191 | Dushanbe Observatory | | RR | Dushanbe |
| 192 | Tashkent Observatory | | Tashkent | Tashkent |
| 193 | Sanglok Observatory | | Khatlon | Sanglok |
| 194 | Tivoli Observatory |  | - | Tivoli |
| 195 | Untermenzing Observatory | | FB | Untermenzing Observatory, Munich |
| 196 | Homburg-Erbach Observatory | | SL | Homburg-Erbach |
| 197 | Bastia Observatory | | ER | Bastia |
| 198 | Wildberg Observatory (Observatorium Wildberg) Src | | BW | Wildberg |
| 199 | Buthiers Observatory (Observatoire de Buthiers) | | CVL | Buthiers |
| 200 | Beersel Hills Observatory | | VLG | Beersel Hills Observatory |
| 201 | Jonathan B. Postel Observatory, Promiod | | Ao | Jonathan B. Postel Observatory |
| 202 | Tamaris Observatoire | | PACA | Tamaris Observatoire, La Seyne sur Mer |
| 203 | GiaGa Observatory | | Lo | GiaGa Observatory |
| 204 | Schiaparelli Observatory | | Lo | Schiaparelli Observatory |
| 205 | Osservatorio Casalecchio di Reno | | ER | Obs. Casalecchio di Reno, Bologna |
| 206 | Haagaar Observatory | | - | Haagaar Observatory, Eina |
| 207 | Osservatorio Antonio Grosso | | Lo | Osservatorio Antonio Grosso |
| 208 | Rivalta Observatory | | ER | Rivalta |
| 209 | Asiago-DLR Asteroid Survey (ADAS) at the Cima Ekar Station (#098) of the Asiago Observatory (#043) | | V | Asiago Observatory, Cima Ekar-ADAS |
| 210 | Almaty Observatory (Alma-Ata Observatory) |  | - | Alma-Ata |
| 211 | Scandicci Observatory | | Tu | Scandicci |
| 212 | La Dehesilla Observatory (Observatorio La Dehesilla) | | AN | Observatorio La Dehesilla |
| 213 | Montcabre Observatory (Observatorio Montcabre) | | CT | Observatorio Montcabre |
| 214 | Garching Observatory | | FB | Garching Observatory |
| 215 | Buchloe Observatory | | FB | Buchloe |
| 216 | Côtes de Meuse Observatory (Observatoire des Côtes de Meuse) | | GE | Observatoire des Cote de Meuse |
| 217 | Assy Observatory | | - | Assy-Turgen |
| 218 | Hyderabad observatory |  | - | Hyderabad |
| 219 | Japal-Rangapur Observatory | | - | Japal-Rangapur |
| 220 | Vainu Bappu Observatory | | - | Vainu Bappu Observatory, Kavalur |
| 221 | IAS Observatory (IAS), Hakos location | | - | IAS Observatory, Hakos |
| 222 | Yerres-Canotiers Observatory | | IDF | Yerres-Canotiers |
| 223 | Madras Observatory (Indian Institute of Astrophysics) | | - | Madras |
| 224 | Ottmarsheim Observatory (Observatoire d'Ottmarsheim), observer: Claudine Rinner | | GE | Ottmarsheim |
| 225 | Northwood Ridge Observatory, Northwood |  | NH | Northwood Ridge Observatory |
| 226 | Guido Ruggieri Observatory | | V | Guido Ruggieri Observatory, Padua |
| 227 | OrbitJet Observatory | | NY | OrbitJet Observatory, Colden |
| 228 | Bruno Zugna Observatory | | F | Bruno Zugna Observatory, Trieste |
| 229 | G. C. Gloriosi Astronomical Observatory | | Cam | G. C. Gloriosi Astronomical Observatory, Salerno |
| 230 | Mount Wendelstein Observatory | | FB | Mt. Wendelstein Observatory |
| 231 | Vesqueville Observatory | | WAL | Vesqueville |
| 232 | Masquefa Observatory | | CT | Masquefa Observatory |
| 233 | Sauro Donati Astronomical Observatory | | Tu | Sauro Donati Astronomical Observatory, San Vito |
| 234 | Coddenham Observatory | | ENG | Coddenham Observatory |
| 235 | CAST Observatory | | F | CAST Observatory, Talmassons |
| 236 | Tomsk Observatory | | Tomsk | Tomsk |
| 237 | Baugy Observatory | | CVL | Baugy |
| 238 | Grorudalen Optical Observatory | | - | Grorudalen Optical Observatory |
| 239 | Michael Adrian Observatory | | HE | Trebur |
| 240 | Herrenberg Observatory (Herrenberg Sternwarte) at Herrenberg | | BW | Herrenberg Sternwarte |
| 241 | Schaerding Observatory | | UA | Schaerding |
| 242 | Varennes Observatory | | Occ | Varennes |
| 243 | Umbrella Observatory | | NI | Umbrella Observatory, Fredenbeck |
| 244 | Geocentric Occultation Observation | SPACE | geocentric | Geocentric Occultation Observation |
| 245 | Spitzer Space Telescope | SPACE | Earth-trailing | Spitzer Space Telescope |
| 246 | Kleť Observatory near Earth and other unusual objects observations team and telescope (KLENOT) at Kleť Observatory (#046) | | JC | Kleť Observatory-KLENOT |
| 247 | Roving Observer | - | geocentric | Roving Observer |
| 248 | Hipparcos | SPACE | geostationary | Hipparcos |
| 249 | SOHO | SPACE | L1 | SOHO |
| 250 | Hubble Space Telescope | SPACE | LEO | Hubble Space Telescope |
| 251 | Arecibo Observatory | | PR | Arecibo |
| 252 | Goldstone DSS 13, at Goldstone Deep Space Communications Complex | | CA | Goldstone DSS 13, Fort Irwin |
| 253 | Goldstone DSS 14, at Goldstone Deep Space Communications Complex | | CA | Goldstone DSS 14, Fort Irwin |
| 254 | Haystack Observatory | | MA | Haystack, Westford |
| 255 | Evpatoria Observatory |  | - | Evpatoria |
| 256 | Green Bank Telescope | | WV | Green Bank |
| 257 | Goldstone DSS 25, at Goldstone Deep Space Communications Complex | | CA | Goldstone DSS 25, Fort Irwin |
| 258 | Gaia space observatory | SPACE | L2 | Gaia |
| 259 | EISCAT Tromso UHF | | - | EISCAT Tromso UHF |
| 260 | Digitized Sky Survey (DSS) at Siding Spring Observatory (see #413) |  | NSW | Siding Spring Observatory-DSS |
| 261 | Digitized Sky Survey (DSS) at Palomar Observatory (see #675) | | CA | Palomar Mountain-DSS |
| 262 | Digitized Sky Survey (DSS) at ESA's La Silla see #809 |  | Co | European Southern Observatory, La Silla-DSS |
| 266 | New Horizons KBO Search with the Subaru Telescope | | HI | New Horizons KBO Search-Subaru |
| 267 | New Horizons KBO Search with the Canada–France–Hawaii Telescope | | HI | New Horizons KBO Search-CFHT |
| 268 | New Horizons KBO Search with the Magellan II (Clay) telescope | | Af | New Horizons KBO Search-Magellan/Clay |
| 269 | New Horizons KBO Search with the Magellan I (Baade) telescope | | Af | New Horizons KBO Search-Magellan/Baade |
| 270 | Unistellar Network, (also see #247 and MPC note) | - | geocentric | Unistellar Network, Roving Observer |
| 276 | Plonsk Observatory, Płońsk | | - | Plonsk |
| 277 | Royal Observatory, Edinburgh (ROE) | | SCT | Royal Observatory, Blackford Hill, Edinburgh |
| 278 | Peking, Transit of Venus site |  | Beijing | Peking, Transit of Venus site |
| 279 | Seeberg Observatory, Gotha (1787–1857) | | TH | Seeberg Observatory, Gotha (1787-1857) |
| 280 | Lilienthal Observatory | | SH | Lilienthal |
| 281 | Bologna Observatory | | ER | Bologna |
| 282 | Nîmes Observatory | | Occ | Nîmes |
| 283 | Bremen Observatory | | HB | Bremen |
| 284 | Driesen Observatory, formerly Germany | | LV | Driesen |
| 285 | Flammarion Observatory | | IDF | Flammarion Observatory, Juvisy |
| 286 | Yunnan Observatory | | Yunnan | Yunnan Observatory |
| 290 | Vatican Advanced Technology Telescope (VATT) at Mount Graham (also see #G83) | | AZ | Mt. Graham-VATT |
| 291 | LPL/Spacewatch II (1.8-meter telescope; also see #691 ) | | AZ | LPL/Spacewatch II |
| 292 | Burlington Observatory | | NJ | Burlington, New Jersey |
| 293 | Burlington remote site Observatory | | NJ | Burlington remote site |
| 294 | Astrophysical Observatory, College of Staten Island | | NY | Astrophysical Obs., College of Staten Island |
| 295 | Catholic University Observatory | | DC | Catholic University Observatory, Washington |
| 296 | Dudley Observatory (after 1893), Schenectady | | NY | Dudley Observatory, Albany (after 1893) |
| 297 | Middlebury College Observatory of Middlebury College | | VT | Middlebury |
| 298 | Van Vleck Observatory, Middletown | | CT | Van Vleck Observatory |
| 299 | Bosscha Observatory, Bandung |  | - | Bosscha Observatory, Lembang |
| 300 | Bisei Spaceguard Center – BATTeRS |  | 33 | Bisei Spaceguard Center-BATTeRS |
| 301 | Observatoire du Mont Mégantic |  | QC | Mont Megantic |
| 302 | University of the Andes, Venezuela station (not built) |  | Mérida | University of the Andes station |
| 303 | Llano del Hato National Astronomical Observatory (Observatorio Astronómico Nacional de Llano del Hato) | | Mérida | OAN de Llano del Hato, Mérida |
| 304 | Las Campanas Observatory | | Af | Las Campanas Observatory |
| 305 | Hainan Island Station – (of the Purple Mountain Obs.; see #330 ) | | Shaanxi | Purple Mountain, Hainan Island station |
| 306 | Taya Beixo Observatory | | Lara | Observatorio Taya Beixo, Barquisimeto |
| 307 | Shattuck Observatory | | NH | Shattuck Observatory, Hanover |
| 309 | Paranal Observatory | | Af | Cerro Paranal |
| 310 | Minor Planet Center – Test Code | | MA | Minor Planet Center Test Code |
| 312 | Tsingtao field Station, Xisha Islands |  | Kaohsiung | Tsingtao field station, Xisha Islands |
| 318 | Quinns Rock Observatory | | WA | Quinns Rock |
| 319 | Perth Observatory, Perth-Lowell Telescope | | WA | Perth Observatory, Perth-Lowell Telescope |
| 320 | Chiro Observatory | | WA | Chiro Observatory |
| 321 | Craigie Observatory | | WA | Craigie |
| 322 | Perth Observatory, (Bickley-MCT) | | WA | Perth Observatory, Bickley-MCT |
| 323 | Perth Observatory, (Bickley) | | WA | Perth Observatory, Bickley |
| 324 | Shaho Station of the Beijing Astronomical Observatory | | Beijing | Peking Observatory, Shaho Station |
| 327 | Xinglong Station (NAOC) of the Beijing Astronomical Obs. | | Hebei | Peking Observatory, Xinglong Station |
| 330 | Purple Mountain Observatory | | Jiangsu | Purple Mountain Observatory, Nanking |
| 333 | Desert Eagle Observatory | | AZ | Desert Eagle Observatory |
| 334 | Tsingtao Observatory | | Shandong | Tsingtao |
| 337 | Sheshan Observatory, formerly Zô-Sé | | Shanghai | Sheshan, formerly Zo-Se |
| 340 | Toyonaka Observatory | | 27 | Toyonaka |
| 341 | Akashina Observatory | | 20 | Akashina |
| 342 | Shishikui Observatory | | 36 | Shishikui |
| 343 | Younchun Observatory |  | Gyeonggi | Younchun |
| 344 | Bohyunsan Optical Astronomy Observatory (BOAO) | | North Gyeongsang | Bohyunsan Optical Astronomy Observatory |
| 345 | Sobaeksan Optical Astronomy Observatory | | North Chungcheong | Sobaeksan Optical Astronomy Observatory |
| 346 | KNUE Astronomical Observatory | | Sejong-si | KNUE Astronomical Observatory |
| 347 | Utsunomiya-Imaizumi Observatory | | - | Utsunomiya-Imaizumi |
| 348 | Ayabe Observatory | | 26 | Ayabe |
| 349 | Ageo Observatory | | 11 | Ageo |
| 350 | Kurohone Observatory | | 10 | Kurohone |
| 351 | Sakamoto Observatory | | 25 | Sakamoto |
| 352 | Konan Observatory | | 25 | Konan |
| 353 | Nishi Kobe Observatory | | 28 | Nishi Kobe |
| 354 | Kawachi Observatory | | 09 | Kawachi |
| 355 | Hadano Observatory | | 14 | Hadano |
| 356 | Kogota Observatory | | 04 | Kogota |
| 357 | Shimotsuma Observatory | | 08 | Shimotsuma |
| 358 | Nanyo Observatory | | 06 | Nanyo |
| 359 | Wakayama Observatory | | 30 | Wakayama |
| 360 | Kuma Kogen Astronomical Observatory | | 38 | Kuma Kogen |
| 361 | Sumoto Observatory | | 28 | Sumoto |
| 362 | Ray Observatory | | 01 | Ray Observatory |
| 363 | Yamada Observatory | | 40 | Yamada |
| 364 | YCPM Kagoshima Station | | 46 | YCPM Kagoshima Station |
| 365 | Uto Observatory | | 29 | Uto Observatory |
| 366 | Miyasaka Observatory | | 19 | Miyasaka Observatory |
| 367 | Yatsuka Observatory | | 32 | Yatsuka |
| 368 | Ochiai Observatory | | 19 | Ochiai |
| 369 | Chichibu Astronomical Observatory, Naoto Satō | | 11 | Chichibu |
| 370 | Kochi Observatory | | 39 | Kochi |
| 371 | Tokyo-Okayama (Okayama Astrophysical Observatory; OAO) of the Tokyo Observatory | | 33 | Tokyo-Okayama |
| 372 | Geisei Observatory | | 39 | Geisei |
| 373 | Oishi Observatory | | 30 | Oishi |
| 374 | Minami-Oda Observatory | | 28 | Minami-Oda Observatory |
| 375 | Uzurano Observatory | | 28 | Uzurano |
| 376 | Uenohara Observatory | | 19 | Uenohara |
| 377 | Kwasan Observatory, Kyoto University (Kwasan and Hida Observatories) | | 26 | Kwasan Observatory, Kyoto |
| 378 | Murou Observatory | | 29 | Murou |
| 379 | Hamamatsu-Yuto Observatory | | 22 | Hamamatsu-Yuto |
| 380 | Ishiki Observatory | | 23 | Ishiki |
| 381 | Kiso Observatory, University of Tokyo | | 20 | Tokyo-Kiso |
| 382 | Norikura Observatory, of Tokyo Astronomical Observatory | | 13 | Tokyo-Norikura |
| 383 | Chirorin Observatory | | 20 | Chirorin |
| 384 | Shimada Observatory | | 22 | Shimada |
| 385 | Nihondaira Observatory | | 22 | Nihondaira Observatory |
| 386 | Yatsugatake-Kobuchizawa | | 19 | Yatsugatake-Kobuchizawa |
| 387 | Dodaira Observatory of Tokyo Astronomical Obs. | | 11 | Tokyo-Dodaira |
| 388 | Mitaka Observatory, Mitaka, Tokyo (of National Astronomical Observatory) | | 13 | Tokyo-Mitaka |
| 389 | Tokyo Astronomical Observatory (before 1938) | | 13 | Tokyo (before 1938) |
| 390 | Utsunomiya Observatory | | 09 | Utsunomiya |
| 391 | Ayashi Station of the Sendai Obs. | | 04 | Sendai Observatory, Ayashi Station |
| 392 | JCPM Sapporo Station | | 01 | JCPM Sapporo Station |
| 393 | JCPM Sakura Station | | 08 | JCPM Sakura Station |
| 394 | JCPM Hamatonbetsu Station | | 01 | JCPM Hamatonbetsu Station |
| 395 | Tokyo-Asahikawa | | 01 | Tokyo-Asahikawa |
| 396 | Asahikawa Observatory | | 01 | Asahikawa |
| 397 | Sapporo Science Center | | 01 | Sapporo Science Center |
| 398 | Nagatoro Observatory | | 11 | Nagatoro |
| 399 | Kushiro Observatory | | 01 | Kushiro |
| 400 | Kitami Observatory | | 01 | Kitami |
| 401 | Oosato Observatory | | 11 | Oosato |
| 402 | Dynic Astronomical Observatory | | 25 | Dynic Astronomical Observatory |
| 403 | Kani Observatory | | 21 | Kani |
| 404 | Yamamoto Observatory | | 07 | Yamamoto |
| 405 | Kamihoriguchi Observatory | | 10 | Kamihoriguchi |
| 406 | Bibai Observatory | | 01 | Bibai |
| 407 | Kahoku Observatory | | 06 | Kahoku |
| 408 | Mount Nyukasa Station | | 20 | Nyukasa |
| 409 | Kiyose and Mizuho | | 13 | Kiyose and Mizuho |
| 410 | Sengamine Observatory | | 28 | Sengamine |
| 411 | Oizumi Observatory | | 10 | Oizumi |
| 412 | Iwaki Observatory | | 07 | Iwaki |
| 413 | Siding Spring Observatory | | NSW | Siding Spring Observatory |
| 414 | Mount Stromlo Observatory | | ACT | Mount Stromlo |
| 415 | Kambah Observatory, near Canberra | | ACT | Kambah |
| 416 | Barton Observatory, near Canberra | | ACT | Barton |
| 417 | Yanagida Astronomical Observatory | | 17 | Yanagida Astronomical Observatory |
| 418 | Tamworth Observatory | | NSW | Tamworth |
| 419 | Windsor Observatory | | NSW | Windsor |
| 420 | Sydney Observatory | | NSW | Sydney |
| 421 | Mt. Kajigamori | | 39 | Mt. Kajigamori, Otoyo |
| 422 | Loomberah Observatory | | NSW | Loomberah |
| 423 | North Ryde Observatory | | NSW | North Ryde |
| 424 | Macquarie Observatory, near Canberra | | ACT | Macquarie |
| 425 | Taylor Range Observatory | | Qld | Taylor Range Observatory, Brisbane |
| 426 | Woomera Observatory | | SA | Woomera |
| 427 | Stockport Observatory | | SA | Stockport |
| 428 | Reedy Creek Observatory | | Qld | Reedy Creek |
| 429 | Hawker Observatory | | ACT | Hawker |
| 430 | Rainbow Observatory | | NSW | Rainbow Observatory, near Coonabarabran |
| 431 | Mount Tarana Observatory | | NSW | Mt. Tarana Observatory, Bathurst |
| 432 | Boambee Observatory | | NSW | Boambee |
| 433 | Bagnall Beach Observatory | | NSW | Bagnall Beach Observatory |
| 434 | S. Benedetto Po Observatory | | Lo | S. Benedetto Po |
| 435 | G. Colombo Astronomical Observatory | | V | G. Colombo Astronomical Observatory, Padua |
| 436 | Livergnano Observatory (Osservatorio di Livergnano) | | ER | Osservatorio di Livergnano |
| 437 | Haverford Observatory | | PA | Haverford |
| 438 | Smith College Observatory | | MA | Smith College Observatory, Northampton |
| 439 | ROTSE-III | | NM | ROTSE-III, Los Alamos |
| 440 | Elginfield Observatory | | ON | Elginfield Observatory |
| 441 | Swilken Brae Observatory | | SCT | Swilken Brae, St. Andrews |
| 442 | Gualba Observatory | | CL | Gualba Observatory |
| 443 | Plomer Observatory (Observatorio Astronomico Plomer) |  | BA | Obs. Astronomico Plomer, Buenos Aires |
| 444 | Star Cruiser Observatory, Anza | | CA | Star Cruiser Observatory |
| 445 | Observatori d'Ontinyent | | V | Observatorio d'Ontinyent |
| 446 | Kingsnake Observatory | | TX | Kingsnake Observatory, Seguin |
| 447 | Centennial Observatory | | CO | Centennial Observatory |
| 448 | Desert Moon Observatory; observers: Janet and Berton L. Stevens (Src, Src) | | NM | Desert Moon Observatory, Las Cruces |
| 449 | Griffin Hunter Observatory | | SC | Griffin Hunter Observatory, Bethune |
| 450 | Carla Jane Observatory | | NC | Carla Jane Observatory, Charlotte |
| 451 | West Skies Observatory | | KS | West Skies Observatory, Mulvane |
| 452 | Big Cypress Observatory | | FL | Big Cypress Observatory, Fort Lauderdale |
| 453 | Edwards Raven Observatory | | CA | Edwards Raven Observatory |
| 454 | Maryland Space Grant Consortium Observatory | | CA | Maryland Space Grant Consortium Observatory |
| 455 | CBA Concord | | CA | CBA Concord |
| 456 | Daventry Observatory | | ENG | Daventry Observatory |
| 457 | Partizanske Observatory | | Trenčín | Partizanske |
| 458 | Guadarrama Observatory | | MD | Guadarrama Observatory |
| 459 | Smith River Observatory | | NH | Smith River Observatory, Danbury |
| 460 | Area 52 Observatory | | AR | Area 52 Observatory, Nashville |
| 461 | Piszkéstető Station – of the Konkoly Obs., see #561 and #053 ; Src | | - | University of Szeged, Piszkesteto Stn. (Konkoly) |
| 462 | Mount Belleview Observatory | | MD | Mount Belleview Observatory |
| 463 | Sommers–Bausch Observatory | | CO | Sommers-Bausch Observatory, Boulder |
| 464 | Toby Point Observatory | | RI | Toby Point Observatory, Narragansett |
| 465 | Takapuna Observatory |  | Au | Takapuna |
| 466 | Mount Molehill Observatory | | Au | Mount Molehill Observatory, Auckland |
| 467 | Stardome Observatory (Auckland Observatory) | | Au | Auckland Observatory |
| 468 | Campo Catino Astronomical Observatory (Osservatorio Astronomico Campo Catino) | | La | Astronomical Observatory, Campo Catino |
| 469 | Courroux Observatory | | SWF | Courroux |
| 470 | Ceccano Observatory (Osservatorio Astronomico Bellatrix) | | La | Ceccano |
| 471 | Houstrup Observatory | | - | Houstrup |
| 472 | Merlette Observatory | | PACA | Merlette |
| 473 | Remanzacco Observatory | | F | Remanzacco |
| 474 | Mount John University Observatory (University of Canterbury Mount John Observatory; UCMJO), | | Ca | Mount John Observatory, Lake Tekapo |
| 475 | Observatory of Turin (before 1913) | | P | Turin (before 1913) |
| 476 | Grange Observatory Src | | P | Grange Observatory, Bussoleno |
| 477 | Galleywood Observatory | | ENG | Galleywood |
| 478 | Lamalou-les-Bains Observatory | | Occ | Lamalou-les-Bains |
| 479 | Sollies-Pont Observatory | | PACA | Sollies-Pont |
| 480 | Cockfield Observatory | | ENG | Cockfield |
| 481 | Moorwarfen Observatory | | SCT | Moorwarfen |
| 482 | St. Andrews Observatory (Observatory of the University of St Andrews) | | SCT | St. Andrews |
| 483 | Carter Observatory | | Mrl | Carter Observatory, Black Birch Station |
| 484 | Happy Valley Observatory | | W | Happy Valley, Wellington |
| 485 | Carter Observatory | | W | Carter Observatory, Wellington |
| 486 | Palmerston North Observatory | | MW | Palmerston North |
| 487 | Macnairston Observatory | | SCT | Macnairston Observatory |
| 488 | Newcastle upon Tyne | | ENG | Newcastle upon Tyne |
| 489 | Hemingford Abbots Observatory | | ENG | Hemingford Abbots |
| 490 | Wimborne Minster Observatory | | ENG | Wimborne Minster |
| 491 | Centro Astronómico de Yebes | | CM | Centro Astronomico de Yebes |
| 492 | Mickleover Observatory | | ENG | Mickleover |
| 493 | Calar Alto Observatory | | AN | Calar Alto |
| 494 | Stakenbridge Observatory, near Kidderminster | | ENG | Stakenbridge |
| 495 | Altrincham Observatory | | ENG | Altrincham |
| 496 | Bishopstoke Observatory | | ENG | Bishopstoke |
| 497 | Ascot-Loudwater Observatory | | ENG | Ascot-Loudwater |
| 498 | Earls Barton Observatory | | ENG | Earls Barton |
| 499 | Cheam Observatory | | ENG | Cheam |
| 500 | Geocentric (e.g. IRAS) | SPACE | - | Geocentric |
| 501 | Herstmonceux Observatory | | ENG | Herstmonceux |
| 502 | Colchester Observatory | | ENG | Colchester |
| 503 | Cambridge Observatory | | ENG | Cambridge |
| 504 | Le Creusot Observatory (Src) | | BFC | Le Creusot |
| 505 | Simon Stevin Observatory | | Noord Brabant | Simon Stevin |
| 506 | Bendestorf Observatory | | NI | Bendestorf |
| 507 | Nyenheim Observatory | | Gelderland | Nyenheim |
| 508 | Zeist Observatory | | Gelderland | Zeist |
| 509 | La Seyne sur Mer Observatory | | PACA | La Seyne sur Mer |
| 510 | Siegen Observatory | | NRW | Siegen |
| 511 | Haute-Provence Observatory (Observatoire de Haute-Provence; OHP) | | PACA | Haute Provence |
| 512 | Leiden Observatory (Sterrewacht Leiden; before 1860) | | Zuid Holland | Leiden (before 1860) |
| 513 | Lyons Observatory | | ARA | Lyons |
| 514 | Mundenheim Observatory (1907–1913) | | RP | Mundenheim (1907-1913) |
| 515 | Dhaun Observatory (Volkssternwarte Dhaun) | | RP | Volkssternwarte Dhaun, near Kirn |
| 516 | Hamburg Observatory (before 1909), German Empire | | H | Hamburg (before 1909) |
| 517 | Geneva Observatory (Observatory of Geneva) (from 1967) | | SWF | Geneva (from 1967) |
| 518 | Marine Observatory | | H | Marine Observatory, Hamburg |
| 519 | Meschede Observatory | | NRW | Meschede |
| 520 | Bonn Observatory | | NRW | Bonn |
| 521 | Remeis Observatory (Dr. Remeis-Sternwarte) | | FB | Remeis Observatory, Bamberg |
| 522 | Observatory of Strasbourg (Observatoire de Strasbourg) | | GE | Strasbourg |
| 523 | Frankfurt Observatory | | HE | Frankfurt |
| 524 | Mannheim Observatory | | BW | Mannheim |
| 525 | Marburg Observatory Src | | HE | Marburg |
| 526 | Kiel Observatory | | SH | Kiel |
| 527 | Altona Observatory (Sternwarte Altona) | | H | Altona |
| 528 | Göttingen Observatory | | NI | Göttingen |
| 529 | Christiania Observatory | | - | Christiania |
| 530 | Lübeck Observatory | | SH | Lubeck |
| 531 | Collegio Romano Observatory (Osservatorio del Collegio Romano) | | La | Collegio Romano, Rome |
| 532 | Bogenhausen Observatory (1819–1938) (de:Universitäts-Sternwarte München; Bogenhausener Sternwarte; Sternwarte zu Bogenhausen) Königlichen Src | | FB | Munich |
| 533 | Padua Observatory | | V | Padua |
| 534 | Leipzig Observatory (since 1861) | | SN | Leipzig (since 1861) |
| 535 | Palermo Astronomical Observatory (Osservatorio Astronomico di Palermo "Giuseppe S. Vaiana") | | Si | Palermo |
| 536 | Babelsberg Observatory (Berlin Observatory after 1913) | | BB | Berlin-Babelsberg |
| 537 | Urania Observatory of Berlin; Berlin Urania Observatory (Urania (Berlin)) | | B | Urania Observatory, Berlin |
| 538 | Austrian Naval Observatory or Pola Observatory; (Sternwarte der kaiserlichen und königlichen Kriegsmarine in Pola; Marine-Sternwarte Pola) located in Pola, now Pula, Croatia | | - | Pola |
| 539 | Kremsmünster Observatory Scr | | UA | Kremsmunster |
| 540 | Davidschlag Observatory (Linz Observatory; Private Observatory Meyer/Obermair; Sternwarte Davidschlag) | | UA | Linz |
| 541 | Štefánik's Observatory (Prague Observatory) | | Prague | Prague |
| 542 | Falkensee Observatory | | BB | Falkensee |
| 543 | Leipzig Observatory (before 1861), German Empire | | SN | Leipzig (before 1861) |
| 544 | Wilhelm Foerster Observatory (Wilhelm-Foerster-Sternwarte) | | B | Schöneberg, Berlin |
| 545 | Vienna Observatory (before 1879), Austria-Hungary | | Vi | Vienna (before 1879) |
| 546 | Oppolzer Observatory | | Vi | Oppolzer Observatory, Vienna |
| 547 | Breslau Observatory (former German Empire; now: Wrocław University Astronomical Observatory) | | LSV | Wrocław, former Breslau |
| 548 | Berlin Observatory (1835–1913) (Berliner Sternwarte, Berlin Observatory, before 1913) | | B | Berlin (1835-1913) |
| 549 | Uppsala Astronomical Observatory (UAO; Astronomiska observatoriet i Uppsala) | | Up | Uppsala |
| 550 | Schwerin Observatory | | MV | Schwerin |
| 551 | Hurbanovo Observatory, formerly O'Gyalla | | Nitra | Hurbanovo, formerly O'Gyalla |
| 552 | San Vittore Observatory (Osservatorio San Vittore) | | ER | Osservatorio S. Vittore, Bologna |
| 553 | Chorzów Observatory | | SV | Chorzow |
| 554 | Burgsolms Observatory | | NI | Burgsolms Observatory, Wetzlar |
| 555 | Cracow-Fort Skała Observatory | | LPV | Cracow-Fort Skala |
| 556 | Reintal Observatory | | FB | Reintal, near Munich |
| 557 | Ondřejov Observatory (Observatoř Ondřejov); observers: Marek Wolf, Josef Hanuš [2] | | SK | Ondřejov |
| 558 | Warsaw Observatory | | MV | Warsaw |
| 559 | Serra La Nave Observatory | | Si | Serra La Nave |
| 560 | Madonna di Dossobuono Observatory (Osservatorio Madonna di Dossobuono) | | V | Madonna di Dossobuono |
| 561 | Piszkéstető Station – of the Konkoly Obs., Budapest,see #461 and #053 | | - | Piszkesteto Stn. (Konkoly) |
| 562 | Figl Observatory | | LA | Figl Observatory, Vienna |
| 563 | Seewalchen Observatory | | UA | Seewalchen |
| 564 | Herrsching Observatory | | FB | Herrsching |
| 565 | Bassano Bresciano Observatory (Osservatorio Astronomico di Bassano Bresciano) | | Lo | Bassano Bresciano |
| 566 | Haleakala-NEAT/GEODSS | | HI | Haleakala-NEAT/GEODSS |
| 567 | Chions Observatory (Osservatorio di Chions; Chaonis Observatory) | | F | Chions |
| 568 | Mauna Kea Observatory | | HI | Mauna Kea |
| 569 | Helsinki Observatory | | Uusimaa | Helsinki |
| 570 | Vilnius Observatory (since 1939) | | - | Vilnius (since 1939) |
| 571 | Cavriana Observatory (Osservatorio "Giordano Bruno") | | Lo | Cavriana |
| 572 | Cologne Observatory | | NRW | Cologne |
| 573 | Eldagsen Observatory | | NI | Eldagsen |
| 574 | Gottolengo Observatory | | Lo | Gottolengo |
| 575 | La Chaux de Fonds Observatory | | SWF | La Chaux de Fonds |
| 576 | Burwash Observatory | | ENG | Burwash |
| 577 | Metzerlen Observatory | | SWG | Metzerlen Observatory |
| 578 | Linden Observatory | | Gauteng | Linden Observatory |
| 579 | Novi Ligure Observatory | | P | Novi Ligure |
| 580 | Graz University Observatory | | S | Graz |
| 581 | Sedgefield Observatory | | WC | Sedgefield |
| 582 | Orwell Park Observatory | | ENG | Orwell Park |
| 583 | Mayaky (observation station) | | Odesa | Mayaky, Odesa Raion, Odesa Oblast |
| 584 | Leningrad Observatory | | Saint Petersburg | Leningrad |
| 585 | Lisnyky (observation station) | | Lisnyky. Kyiv region. Ukraine. | Lisnyky (observation station) |
| 586 | Pic du Midi Observatory (Observatoire du Pic du Midi) | | Occ | Pic du Midi |
| 587 | Sormano Astronomical Observatory (Osservatorio Astronomico Sormano) | | Lo | Sormano |
| 588 | Eremo di Tizzano Observatory | | ER | Eremo di Tizzano |
| 589 | Santa Lucia Stroncone Astronomical Observatory (Osservatorio Astrometrico Santa Lucia Stroncone); observers: Antonio Vagnozzi [2] | | U | Santa Lucia Stroncone |
| 590 | Metzerlen Observatory | | SWG | Metzerlen |
| 591 | Resse Observatory | | NI | Resse Observatory |
| 592 | Solingen Observatory | | NRW | Solingen |
| 593 | Monte Argentario Observatory | | Tu | Monte Argentario |
| 594 | Monte Autore Observatory | | La | Monte Autore |
| 595 | Farra d'Isonzo Observatory (Astronomical Observatory of Farra d'Isonzo; Osservatorio Astronomico di Farra d'Isonzo) | | F | Farra d'Isonzo |
| 596 | Colleverde di Guidonia Observatory (Osservatorio Colleverde di Guidonia) | | La | Colleverde di Guidonia |
| 597 | Springe Observatory | | NI | Springe |
| 598 | Loiano Observatory (Osservatorio Astronomico di Loiano) | | ER | Loiano |
| 599 | Campo Imperatore Near-Earth Object Survey (CINEOS) | | Ab | Campo Imperatore-CINEOS |
| 600 | TLC Observatory | | ER | TLC Observatory, Bologna |
| 601 | Engelhardt Observatory (Engelhardt-Sternwarte) in Dresden | | SN | Engelhardt Observatory, Dresden |
| 602 | Urania Observatory (Urania, Vienna) | | Vi | Urania Observatory, Vienna |
| 603 | Bothkamp Observatory (Sternwarte Bothkamp), near Kiel Src | | SH | Bothkamp |
| 604 | Archenhold Observatory (Archenhold Sternwarte) | | B | Archenhold Sternwarte, Berlin-Treptow |
| 605 | Marl Observatory | | NRW | Marl |
| 606 | Norderstedt Observatory | | SH | Norderstedt |
| 607 | Hagen Observatory; not to be confused with: #B86 | | NRW | Hagen Observatory, Ronkhausen |
| 608 | Air Force Maui Optical and Supercomputing observatory (AMOS) Haleakala-AMOS | | HI | Haleakala-AMOS |
| 609 | Polino Observatory (Osservatorio Polino) | | U | Osservatorio Polino |
| 610 | Pianoro Observatory | | ER | Pianoro |
| 611 | Starkenburg Observatory (Heppenheim Observatory; Starkenburg-Sternwarte) | | NI | Starkenburg Sternwarte, Heppenheim |
| 612 | Lenkerbeck Observatory | | NRW | Lenkerbeck |
| 613 | Heisingen Observatory | | NRW | Heisingen |
| 614 | Soisy-sur-Seine Observatory | | IDF | Soisy-sur-Seine |
| 615 | Observatory of Saint-Veran (Src) | | PACA | St. Veran |
| 616 | Brno Observatory | | South Moravia | Brno |
| 617 | Arbonne-la-Forêt Observatory | | IDF | Arbonne la Foret |
| 618 | Martigues Observatory | | PACA | Martigues |
| 619 | Sabadell Observatory | | CT | Sabadell |
| 620 | Astronomical Observatory of Mallorca (Observatorio Astronómico de Mallorca); observer: Reiner Stoss, Salvador Sánchez, Jaume Nomen [2] | | IB | Observatorio Astronomico de Mallorca |
| 621 | Bergisch Gladbach Observatory | | NRW | Bergisch Gladbach |
| 622 | Oberwichtrach Observatory | | SWG | Oberwichtrach |
| 623 | Liège Observatory | | WAL | Liege |
| 624 | Dertingen Observatory | | BW | Dertingen |
| 625 | Air Force Maui Optical and Supercomputing observatory (AMOS) Kihei | | HI | Kihei-AMOS Remote Maui Experimental Site |
| 626 | Geel Observatory | | VLG | Geel |
| 627 | Blauvac Observatory (Observatoire de Blauvac) observer: René Roy [2] | | PACA | Blauvac |
| 628 | Turtle Star Observatory Src Archived 2020-02-23 at the Wayback Machine | | NRW | Mulheim-Ruhr |
| 629 | Szeged Observatory, JATE Observatory | | - | Szeged Observatory |
| 630 | Osenbach Observatory | | GE | Osenbach |
| 631 | Hamburg-Georgswerder | | H | Hamburg-Georgswerder |
| 632 | San Paolo a Mosciano Observatory | | Tu | San Polo A Mosciano |
| 633 | Romito Observatory | | Lo | Romito |
| 634 | Crolles Observatory | | ARA | Crolles |
| 635 | Pergignan Observatory | | Occ | Pergignan |
| 636 | Walter Hohmann Observatory (Essen Observatory) Src | | NRW | Essen |
| 637 | Hamburg-Himmelsmoor Observatory | | H | Hamburg-Himmelsmoor |
| 638 | Detmold Observatory | | NRW | Detmold |
| 639 | Dresden Observatory | | SN | Dresden |
| 640 | Senftenberger Observatory (Senftenberger Sternwarte) | | SK | Senftenberger Sternwarte |
| 641 | Overberg Observatory | | WC | Overberg |
| 642 | Oak Bay | | BC | Oak Bay, Victoria |
| 643 | OCA-Anza Observatory (Orange County Astronomers – Anza) | | CA | OCA-Anza Observatory |
| 644 | Near-Earth Asteroid Tracking (NEAT) at (Palomar Observatory) | | CA | Palomar Mountain/NEAT |
| 645 | Sloan Digital Sky Survey (SDSS), Sunspot, at (Apache Point Observatory) | | NM | Apache Point-Sloan Digital Sky Survey |
| 646 | Santana Observatory: observer: Robert Stephens (see #G79, #U81) [2] | | CA | Santana Observatory, Rancho Cucamonga |
| 647 | Stone Finder Observatory | | AB | Stone Finder Observatory, Calgary |
| 648 | Winer Observatory | | AZ | Winer Observatory, Sonoita |
| 649 | Powell Observatory | | KS | Powell Observatory, Louisburg |
| 650 | Temecula Observatory | | CA | Temecula |
| 651 | Grasslands Observatory | | AZ | Grasslands Observatory, Tucson |
| 652 | Rock Finder Observatory | | AB | Rock Finder Observatory, Calgary |
| 653 | Torus Observatory | | WA | Torus Observatory, Buckley |
| 654 | Table Mountain Observatory, Wrightwood-PHMC | | CA | Table Mountain Observatory, Wrightwood-PHMC |
| 655 | Sooke Observatory | | BC | Sooke |
| 656 | Victoria Observatory | | BC | Victoria |
| 657 | Climenhaga Observatory | | BC | Climenhaga Observatory, Victoria |
| 658 | National Research Council of Canada (Dominion Astrophysical Observatory, Saanich) | | BC | National Research Council of Canada |
| 659 | Heron Cove Observatory, Orcas | | WA | Heron Cove Observatory, Orcas |
| 660 | Leuschner Observatory, Berkeley | | CA | Leuschner Observatory, Berkeley |
| 661 | Rothney Astrophysical Observatory, Priddis | | AB | Rothney Astrophysical Observatory, Priddis |
| 662 | Lick Observatory, Mount Hamilton | | CA | Lick Observatory, Mount Hamilton |
| 663 | Red Mountain Observatory, Ivins | | UT | Red Mountain Observatory |
| 664 | Manastash Ridge Observatory, Ellensburg | | WA | Manastash Ridge Observatory |
| 665 | Wallis Observatory | | CA | Wallis Observatory |
| 666 | Moorpark College Observatory, Ventura County | | CA | Moorpark College Observatory |
| 667 | Wanapum Dam Observatory | | WA | Wanapum Dam |
| 668 | San Emigdio Peak | | CA | San Emigdio Peak |
| 669 | Ojai Observatory | | CA | Ojai |
| 670 | Camarillo Observatory | | CA | Camarillo |
| 671 | Stony Ridge Observatory | | CA | Stony Ridge |
| 672 | Mount Wilson Observatory | | CA | Mount Wilson |
| 673 | Table Mountain Observatory | | CA | Table Mountain Observatory, Wrightwood |
| 674 | Ford Observatory | | CA | Ford Observatory, Wrightwood |
| 675 | Palomar Observatory | | CA | Palomar Mountain |
| 676 | San Clemente Observatory | | CA | San Clemente |
| 677 | Lake Arrowhead | | CA | Lake Arrowhead |
| 678 | Fountain Hills Observatory | | AZ | Fountain Hills |
| 679 | National Astronomical Observatory (Mexico) |  | Baja California | San Pedro Martir |
| 680 | Los Angeles Observatory | | CA | Los Angeles |
| 681 | Calgary Observatory (Centre for Backyard Astrophysics) | | AB | Calgary |
| 682 | Crescent Butte Observatory; observer Edwin E. Sheridan | | UT | Kanab |
| 683 | Goodricke-Pigott Observatory, Tucson | | AZ | Goodricke-Pigott Observatory, Tucson |
| 684 | Prescott Observatory | | AZ | Prescott |
| 685 | Williams Observatory | | AZ | Williams |
| 686 | U. of Minn. Infrared Obs., Mt. Lemmon (UMN Mount Lemmon Observing Facility) | | AZ | U. of Minn. Infrared Obs., Mt. Lemmon |
| 687 | Northern Arizona University | | AZ | Northern Arizona University, Flagstaff |
| 688 | Lowell Observatory, Anderson Mesa Station | | AZ | Lowell Observatory, Anderson Mesa Station |
| 689 | United States Naval Observatory Flagstaff Station (NOFS) | | AZ | U.S. Naval Observatory, Flagstaff |
| 690 | Lowell Observatory; observer: Brian Skiff | | AZ | Lowell Observatory, Flagstaff |
| 691 | Spacewatch at Kitt Peak, Steward Observatory (0.9-meter telescope) | | AZ | Steward Observatory, Kitt Peak-Spacewatch |
| 692 | Steward Observatory | | AZ | Steward Observatory, Tucson |
| 693 | Catalina Station | | AZ | Catalina Station, Tucson |
| 694 | Tumamoc Hill at Steward Observatory | | AZ | Tumamoc Hill, Tucson |
| 695 | Kitt Peak National Observatory | | AZ | Kitt Peak |
| 696 | Fred Lawrence Whipple Observatory | | AZ | Whipple Observatory, Mt. Hopkins |
| 697 | MDM Observatory at Kitt Peak, McGraw-Hill | | AZ | Kitt Peak, McGraw-Hill |
| 698 | Mt. Bigelow | | AZ | Mt. Bigelow |
| 699 | Lowell Observatory Near-Earth-Object Search (LONEOS) at Anderson Mesa Station, Lowell Observatory | | AZ | Lowell Observatory-LONEOS |
| 700 | Chinle Observatory | | AZ | Chinle |
| 701 | Junk Bond Observatory, Sierra Vista | | AZ | Junk Bond Observatory, Sierra Vista |
| 702 | Joint Observatory for cometary research (now the site of Magdalena Ridge Observatory) | | NM | Joint Obs. for cometary research, Socorro |
| 703 | Catalina Sky Survey, Tucson | | AZ | Catalina Sky Survey |
| 704 | Lincoln Laboratory ETS (Lincoln Laboratory's Experimental Test Site), Socorro, (also see LINEAR) | | NM | Lincoln Laboratory ETS, New Mexico |
| 705 | Apache Point, Sunspot (Apache Point Observatory) | | NM | Apache Point |
| 706 | Salida Observatory | | CO | Salida |
| 707 | Chamberlin field station | | CO | Chamberlin field station |
| 708 | Chamberlin Observatory, Denver | | CO | Chamberlin Observatory, Denver |
| 709 | W & B Observatory, Warren & Beverly" Offutt Observatory | | NM | W & B Observatory, Cloudcroft |
| 710 | MPO Observatory | | CO | MPO Observatory, Florissant |
| 711 | McDonald Observatory | | TX | McDonald Observatory, Fort Davis |
| 712 | USAF Academy Observatory | | CO | USAF Academy Observatory, Colorado Springs |
| 713 | Thornton Observatory; observer: Robert A. Koff (also see #H09) | | CO | Thornton |
| 714 | Bagdad Observatory | | AZ | Bagdad |
| 715 | Jornada Observatory | | NM | Jornada Observatory, Las Cruces |
| 716 | Palmer Divide Observatory; observer: Brian D. Warner | | CO | Palmer Divide Observatory, Colorado Springs |
| 717 | Prude Ranch Observatory | | TX | Prude Ranch |
| 718 | University of Utah, Tooele | | UT | Tooele |
| 719 | Etscorn Observatory (Frank T. Etscorn Campus Observatory, Socorro New Mexico Tech Astronomy Club Src | | NM | Etscorn Observatory |
| 720 | Universidad de Monterrey Observatory, Nuevo León | | - | Universidad de Monterrey |
| 721 | Lime Creek Observatory | | NE | Lime Creek |
| 722 | Missouri City Observatory | | TX | Missouri City |
| 723 | Cottonwood Observatory | | OK | Cottonwood Observatory, Ada |
| 724 | National Observatory (Observatorio Astronómico Nacional; Observatorio de Tacubaya) | | - | National Observatory, Tacubaya |
| 725 | Fair Oaks Ranch Observatory | | TX | Fair Oaks Ranch |
| 726 | Fire in the Sky Observatory | | MN | Brainerd |
| 727 | Zeno Observatory | | OK | Zeno Observatory, Edmond |
| 728 | Corpus Christi | | TX | Corpus Christi |
| 729 | Glenlea Astronomical Observatory | | MB | Glenlea Astronomical Observatory, Winnipeg |
| 730 | University of North Dakota, Grand Forks | | ND | University of North Dakota, Grand Forks |
| 731 | Rose-Hulman Observatory | | IN | Rose-Hulman Observatory, Terre Haute |
| 732 | Oaxaca Observatory | | - | Oaxaca |
| 733 | Allen Observatory | | TX | Allen, Texas |
| 734 | Farpoint Observatory | | KS | Farpoint Observatory, Eskridge |
| 735 | George Observatory (Needville Observatory) | | TX | George Observatory, Needville |
| 736 | Houston Observatory | | TX | Houston |
| 737 | New Bullpen Observatory | | GA | New Bullpen Observatory, Alpharetta |
| 738 | Observatory of the State University of Missouri | | MO | Observatory of the State University of Missouri |
| 739 | Sunflower Observatory | | KS | Sunflower Observatory, Olathe |
| 740 | SFA Observatory | | TX | SFA Observatory, Nacogdoches |
| 741 | Goodsell Observatory | | MN | Goodsell Observatory, Northfield |
| 742 | Drake University | | IA | Drake University, Des Moines |
| 743 | University of Minnesota | | MN | University of Minnesota, Minneapolis |
| 744 | Doyan Rose Observatory | | IN | Doyan Rose Observatory, Indianapolis |
| 745 | Glasgow Observatory | | MO | Morrison Observatory, Glasgow |
| 746 | Brooks Astronomical Observatory | | MI | Brooks Observatory, Mt. Pleasant |
| 747 | Highland Road Park Observatory (a.k.a. Baton Rouge Observatory) | | LA | Highland Road Park Observatory |
| 748 | Van Allen Observatory | | IA | Van Allen Observatory, Iowa City |
| 749 | Oakwood Observatory | | GA | Oakwood |
| 750 | Hobbs Observatory | | WI | Hobbs Observatory, Fall Creek |
| 751 | Lake Saint Louis Observatory | | MO | Lake Saint Louis |
| 752 | Puckett Observatory | | GA | Puckett Observatory, Mountain Town |
| 753 | Washburn Observatory | | WI | Washburn Observatory, Madison |
| 754 | Yerkes Observatory | | WI | Yerkes Observatory, Williams Bay |
| 755 | Optec Observatory | | MI | Optec Observatory |
| 756 | Dearborn Observatory | | IL | Dearborn Observatory, Evanston |
| 757 | High Point Observatory | | NC | High Point |
| 758 | Astronaut Memorial Planetarium & Observatory (BCC Observatory; Brevard Community College Observatory) | | FL | BCC Observatory, Cocoa |
| 759 | Nashville Observatory (Vanderbilt's Dyer Observatory) | | TN | Nashville |
| 760 | Goethe Link Observatory | | IN | Goethe Link Observatory, Brooklyn |
| 761 | Quail Hollow Observatory | | FL | Zephyrhills |
| 762 | Four Winds Observatory | | MI | Four Winds Observatory, Lake Leelanau |
| 763 | King City Observatory | | ON | King City |
| 764 | Puckett Observatory | | GA | Puckett Observatory, Stone Mountain |
| 765 | Cincinnati Observatory | | OH | Cincinnati |
| 766 | Michigan State University Observatory | | MI | Michigan State University Obs., East Lansing |
| 767 | Angell Hall Observatory | | MI | Ann Arbor |
| 768 | UM-Dearborn Observatory | | MI | Dearborn Observatory |
| 769 | McMillin Observatory | | OH | McMillin Observatory, Columbus |
| 770 | Crescent Moon Observatory | | OH | Crescent Moon Observatory, Columbus |
| 771 | Boyeros Observatory (Observatorio de Rancho Boyeros) |  | - | Boyeros Observatory, Havana |
| 772 | Boltwood Observatory | | ON | Boltwood Observatory, Stittsville |
| 773 | Warner and Swasey Observatory – Cleveland | | OH | Warner and Swasey Observatory, Cleveland |
| 774 | Warner and Swasey Nassau Station – Chardon | | OH | Warner and Swasey Nassau Station, Chardon |
| 775 | Sayre Observatory | | PA | Sayre Observatory, South Bethlehem |
| 776 | Foggy Bottom Observatory | | NY | Foggy Bottom, Hamilton |
| 777 | Toronto Observatory | | ON | Toronto |
| 778 | Allegheny Observatory | | PA | Allegheny Observatory, Pittsburgh |
| 779 | David Dunlap Observatory | | ON | David Dunlap Observatory, Richmond Hill |
| 780 | Leander McCormick Observatory | | VA | Leander McCormick Observatory, Charlottesville |
| 781 | Quito Observatory |  | - | Quito |
| 782 | Quito, comet astrograph station | | - | Quito, comet astrograph station |
| 783 | Rixeyville Observatory | | VA | Rixeyville |
| 784 | Stull Observatory | | NY | Stull Observatory, Alfred University |
| 785 | Fitz-Randolph Observatory | | NJ | Fitz-Randolph Observatory, Princeton |
| 786 | United States Naval Observatory (USNO; since 1893) | | D.C. | U.S. Naval Obs., Washington (since 1893) |
| 787 | United States Naval Observatory (USNO; before 1893) | | D.C. | U.S. Naval Obs., Washington (before 1893) |
| 788 | Mount Cuba Observatory | | DE | Mount Cuba Observatory, Wilmington |
| 789 | Litchfield Observatory (Hamilton College), Oneida County; not to be confused with #845 | | NY | Litchfield Observatory, Clinton |
| 790 | Dominion Observatory | | ON | Dominion Observatory, Ottawa |
| 791 | Flower and Cook Observatory | | PA | Flower and Cook Observatory, Philadelphia |
| 792 | University of Rhode Island | | RI | University of Rhode Island, Quonochontaug |
| 793 | Dudley Observatory (before 1893) | | NY | Dudley Observatory, Albany (before 1893) |
| 794 | Vassar College Observatory | | NY | Vassar College Observatory, Poughkeepsie |
| 795 | Rutherford Observatory | | NY | Rutherford |
| 796 | Stamford Observatory | | CT | Stamford |
| 797 | Yale University Observatory – New Haven | | CT | Yale Observatory, New Haven |
| 798 | Yale University Observatory – Bethany | | CT | Yale Observatory, Bethany |
| 799 | Winchester Observatory | | MA | Winchester |
| 800 | Boyden Station of the Harvard Observatory |  | - | Harvard Observatory, Arequipa |
| 801 | Oak Ridge Observatory (George R. Agassiz Station) | | MA | Oak Ridge Observatory |
| 802 | Harvard College Observatory | | MA | Harvard Observatory, Cambridge |
| 803 | Taunton Observatory | | MA | Taunton |
| 804 | Santiago-San Bernardo Observatory | | - | Santiago-San Bernardo |
| 805 | Cerro El Roble Station (of Chile's National Astronomical Observatory, see #806), Santiago | | - | Santiago-Cerro El Roble |
| 806 | National Astronomical Observatory (Chile) | | - | Santiago-Cerro Calán |
| 807 | Cerro Tololo Inter-American Observatory | | Co | Cerro Tololo Observatory, La Serena |
| 808 | Félix Aguilar Observatory ,Carlos U. Cesco Station; (El Leoncito) | | J | Estación de Altura Carlos Cesco |
| 809 | La Silla Observatory of the European Southern Observatory (ESO) | | Co | European Southern Observatory, La Silla |
| 810 | George R. Wallace Jr. Astrophysical Observatory (WAO) | | MA | Wallace Observatory, Westford |
| 811 | Maria Mitchell Observatory | | MA | Maria Mitchell Observatory, Nantucket |
| 812 | Viña del Mar Observatory | | - | Vina del Mar |
| 813 | Santiago-Quinta Normal (1862–1920) (see #806, National Astronomical Observatory) | | - | Santiago-Quinta Normal (1862-1920) |
| 814 | North Scituate Observatory | | RI | North Scituate |
| 815 | Santiago-Santa Lucia (1849–1861) (see #806, National Astronomical Observatory) | | - | Santiago-Santa Lucia (1849-1861) |
| 816 | Rand Observatory | | NY | Rand Observatory |
| 817 | Sudbury Observatory | | MA | Sudbury |
| 818 | Gémeaux Observatory (Observatoire Gémeaux) | | QC | Gemeaux Observatory, Laval |
| 819 | Val-des-Bois Observatory | | QC | Val-des-Bois |
| X16 | Astronomía Sigma Octante | Bo | Cochabamba | |
| 820 | Tarija Observatory |  | - | Tarija |
| 821 | Bosque Alegre Station (Estación Astrofísica de Bosque Alegre) of the Córdoba Observatory, see #822 | | Cór | Cordoba-Bosque Alegre |
| 822 | Argentine National Observatory (Córdoba Observatory; Astronomical Observatory of Córdoba; Observatorio Astronómico de Córdoba) | | Cór | Cordoba |
| 823 | Scott Observatory (Fitchburg Observatory) Src | | MA | Fitchburg |
| 824 | Lake Clear Observatory | | NY | Lake Clear |
| 825 | Granville Observatory | | MA | Granville |
| 826 | Plessisville Observatory, Plessisville | | QC | Plessissville |
| 827 | Saint-Félicien Observatory | | QC | Saint-Felicien |
| 828 | Assonet Observatory | | MA | Assonet |
| 829 | Leoncito Astronomical Complex (Complejo Astronómico El Leoncito) | | J | Complejo Astronomico El Leoncito |
| 830 | Hudson Observatory | | NH | Hudson |
| 831 | Rosemary Hill Observatory | | FL | Rosemary Hill Observatory, University of Florida |
| 832 | Etters Observatory | | PA | Etters |
| 833 | Mercedes Observatory (Observatorio Astronomico de Mercedes) | | BA | Obs. Astronomico de Mercedes, Buenos Aires |
| 834 | Argentinian Association of Amateur Astronomers (Asociación Argentina Amigos de la Astronomía; A.A.A.A., asaramas) | | BA | Buenos Aires-AAAA |
| 835 | Drum Hill Station | | MA | Drum Hill Station, Chelmsford |
| 836 | Furnace Brook Observatory | | RI | Furnace Brook Observatory, Cranston |
| 837 | Jupiter Observatory; Boca Raton Observatory at Boca Raton; observer: B. A. Segal Src | | FL | Jupiter |
| 838 | Dayton Observatory | | OH | Dayton |
| 839 | La Plata Astronomical Observatory (Observatorio Astronómico de La Plata) | | LP | La Plata |
| 840 | Flint Observatory | | MI | Flint |
| 841 | Martin Observatory | | VA | Martin Observatory, Blacksburg |
| 842 | Gettysburg College Observatory | | PA | Gettysburg College Observatory |
| 843 | Emerald Lane Observatory | | AL | Emerald Lane Observatory, Decatur |
| 844 | Los Molinos Observatory (Observatorio Astronómico Los Molinos) |  | - | Observatorio Astronomico Los Molinos |
| 845 | Clinton B. Ford Observatory; not to be confused with #789 | | NY | Ford Observatory, Ithaca |
| 846 | Principia Astronomical Observatory | | IL | Principia Astronomical Observatory, Elsah |
| 847 | Lunar Cafe Observatory | | MI | Lunar Cafe Observator, Flint |
| 848 | Tenagra Observatory Src | | OR | Tenagra Observatory, Cottage Grove |
| 849 | Everstar Observatory (EverStaR Observatory) | | KS | Everstar Observatory, Olathe |
| 850 | Cordell-Lorenz Observatory | | TN | Cordell-Lorenz Observatory, Sewanee |
| 851 | Burke-Gaffney Observatory | | NS | Burke-Gaffney Observatory, Halifax |
| 852 | River Moss Observatory | | MO | River Moss Observatory, St. Peters |
| 853 | Biosphere 2 Observatory | | AZ | Biosphere 2 Observatory |
| 854 | Sabino Canyon Observatory | | AZ | Sabino Canyon Observatory, Tucson |
| 855 | Wayside Observatory | | MN | Wayside Observatory, Minnetonka |
| 856 | Roach Motel Observatory | | CA | Riverside |
| 857 | Iowa Robotic Observatory | | AZ | Iowa Robotic Observatory, Sonoita |
| 858 | Tebbutt Observatory | | NM | Tebbutt Observatory, Edgewood |
| 859 | Wykrota Observatory (Observatório Wykrota) at CEAMIG (Centro de Estudos Astronômicos de Minas Gerais) |  | MG | Wykrota Observatory-CEAMIG |
| 860 | Valinhos Observatory | | SP | Valinhos |
| 861 | Barão Geraldo Observatory | | SP | Barao Geraldo |
| 862 | Saku Observatory | | - | Saku |
| 863 | Furukawa Observatory | | - | Furukawa |
| 864 | Kumamoto Civil Astronomical Observatory (KCAO) | | - | Kumamoto |
| 865 | Emmy Observatory | | NY | Emmy Observatory, New Paltz |
| 866 | United States Naval Academy | | MD | U.S. Naval Academy, Michelson |
| 867 | Saji Observatory | | - | Saji Observatory |
| 868 | Hidaka Observatory | | - | Hidaka Observatory |
| 869 | Tosa Observatory | | - | Tosa |
| 870 | Campinas Observatory (Observatório de Campinas; Observatório Municipal de Campinas "Jean Nicolini") | | SP | Campinas |
| 871 | Akou Observatory | | - | Akou |
| 872 | Tokushima-Kainan Astronomical Observatory | | 36 | Tokushima |
| 873 | Kurashiki Observatory, Okayama Astrophysical Observatory | | 33 | Kurashiki Observatory |
| 874 | Pico dos Dias Observatory (Observatório Pico dos Dias) | | MG | Observatorio do Pico dos Dias, Itajubá |
| 875 | Yorii Observatory | | - | Yorii |
| 876 | Honjo Observatory | | - | Honjo |
| 877 | Okutama Observatory | | - | Okutama |
| 878 | Kagiya Observatory | | - | Kagiya |
| 879 | Tōkai Observatory | | 23 | Tokai |
| 880 | National Observatory (Brazil) (Rio de Janeiro Observatory; Observatório Nacional; ON) | | RJ | Rio de Janeiro |
| 881 | Toyota Observatory | | 23 | Toyota |
| 882 | JCPM Oi Station | | - | JCPM Oi Station |
| 883 | Shizuoka Observatory | | 22 | Shizuoka |
| 884 | Kawane Observatory | | - | Kawane |
| 885 | JCPM Yakiimo Station | | 22 | JCPM Yakiimo Station |
| 886 | Mishima Observatory (at Susono, Shizuoka and Mishima, Shizuoka) | | 22 | Mishima |
| 887 | Ojima Observatory | | 10 | Ojima |
| 888 | Gekko Observatory | | 22 | Gekko |
| 889 | Karasuyama Observatory | | - | Karasuyama |
| 890 | JCPM Tone Station | | - | JCPM Tone Station |
| 891 | JCPM Kimachi Station | | - | JCPM Kimachi Station |
| 892 | YGCO Hoshikawa and Nagano Stations | | 20 | YGCO Hoshikawa and Nagano Stations |
| 893 | Sendai Astronomical Observatory (Sendai Municipal Observatory) | | - | Sendai Municipal Observatory |
| 894 | Kiyosato Observatory | | - | Kiyosato |
| 895 | Hatamae Observatory | | - | Hatamae |
| 896 | Yatsugatake South Base Observatory (near #386 Yatsugatake-Kobuchizawa) | | 13 | Yatsugatake South Base Observatory |
| 897 | YGCO Chiyoda Station (YGCO: Yamaneko Group of Comet Observers) | | - | YGCO Chiyoda Station |
| 898 | Fujieda Observatory | | 22 | Fujieda |
| 899 | Toma Observatory | | - | Toma |
| 900 | Moriyama Observatory | | 25 | Moriyama |
| 901 | Tajimi Observatory | | 21 | Tajimi |
| 902 | Ootake Observatory | | - | Ootake |
| 903 | Fukuchiyama and Kannabe Observatory | | - | Fukuchiyama and Kannabe |
| 904 | Go-Chome and Kobe-Suma Observatory | | - | Go-Chome and Kobe-Suma |
| 905 | Nachi-Katsuura Observatory | | 30 | Nachi-Katsuura Observatory |
| 906 | Cobram Observatory | | Vic | Cobram |
| 907 | Melbourne Observatory | | Vic | Melbourne |
| 908 | Toyama Observatory | | - | Toyama |
| 909 | Snohomish Hilltop Observatory | | WA | Snohomish Hilltop Observatory |
| 910 | OCA–DLR Asteroid Survey (ODAS) at Caussols | | - | Caussols-ODAS |
| 911 | Collins Observatory (Eileen M. Collins Observatory), Elmira-Corning Astronomical Society ("Elmira"), Corning | | NY | Collins Observatory, Corning Community College |
| 912 | Carbuncle Hill Observatory; observer: Donald Pray (also see #I00) | | RI | Carbuncle Hill Observatory, Greene |
| 913 | Kappa Crucis Observatory (Observatorio Kappa Crucis) | | - | Observatorio Kappa Crucis, Montevideo |
| 914 | Underwood Observatory | | MA | Underwood Observatory, Hubbardston |
| 915 | River Oaks Observatory | | TX | River Oaks Observatory, New Braunfels |
| 916 | Oakley Observatory | | IN | Oakley Observatory, Terre Haute |
| 917 | Pacific Lutheran University Keck Observatory | | WA | Pacific Lutheran University Keck Observatory |
| 918 | Badlands Observatory | | SD | Badlands Observatory, Quinn |
| 919 | Desert Beaver Observatory | | AZ | Desert Beaver Observatory |
| 920 | RIT Observatory (Rochester Institute of Technology) | | NY | RIT Observatory, Rochester |
| 921 | SW Institute for Space Research | | NM | SW Institute for Space Research, Cloudcroft |
| 922 | Timberland Observatory | | AL | Timberland Observatory, Decatur |
| 923 | Bradstreet Observatory | | PA | The Bradstreet Observatory, St. Davids |
| 924 | Cégep de Trois-Rivières Observatory (Observatoire du Cégep de Trois-Rivières) | | - | Observatoire du Cegep de Trois-Rivieres |
| 925 | Palominas Observatory | | AZ | Palominas Observatory |
| 926 | Tenagra II Observatory | | AZ | Tenagra II Observatory, Nogales |
| 927 | Madison-YRS | | WI | Madison-YRS |
| 928 | Moonedge Observatory | | NY | Moonedge Observatory, Northport |
| 929 | Blackberry Observatory | | LA | Port Allen |
| 930 | Southern Stars Observatory |  | - | Southern Stars Observatory, Tahiti |
| 931 | Punaauia Observatory, Puna'auia | | - | Punaauia |
| 932 | John J. McCarthy Observatory | | CT | John J. McCarthy Obs., New Milford |
| 933 | Rockland Observatory | | AZ | Rockland Observatory, Sierra Vista |
| 934 | Poway Valley Observatory | | CA | Poway Valley |
| 935 | Wyrick Observatory | | VA | Wyrick Observatory, Haymarket |
| 936 | Ibis Observatory | | KS | Ibis Observatory, Manhattan |
| 937 | Bradbury Observatory | | ENG | Bradbury Observatory, Stockton-on-Tees |
| 938 | Linhaceira Observatory; observer: Rui Goncalves [2] |  | - | Linhaceira |
| 939 | Rodeno Observatory (Observatorio Rodeno) | | - | Observatorio Rodeno |
| 940 | Waterlooville Observatory | | ENG | Waterlooville |
| 941 | Pla D'Arguines Observatory (Observatorio Astronomico Pla D'Arguines) | | - | Observatorio Pla D'Arguines |
| 942 | Grantham Observatory | | ENG | Grantham |
| 943 | Peverell Observatory | | ENG | Peverell, Plymouth |
| 944 | Geminis Observatory (Observatorio Geminis, also see #I30 in Argentina) | | - | Observatorio Geminis, Dos Hermanas |
| 945 | Monte Deva Observatory (Observatorio Monte Deva) | | - | Observatorio Monte Deva |
| 946 | Ametlla de Mar Observatory | | CT | Ametlla de Mar |
| 947 | Saint-Sulpice Observatory (Observatoire de Saint-Sulpice) | | - | Saint-Sulpice |
| 948 | Pymoor Observatory | | ENG | Pymoor |
| 949 | Durtal Observatory | | - | Durtal |
| 950 | Roque de los Muchachos Observatory (La Palma Observatory) | | CN | La Palma |
| 951 | Highworth Observatory | | ENG | Highworth |
| 952 | Marxuquera Observatory (Observatori Astronòmic Marxuquera) | | - | Marxuquera |
| 953 | Montjoia Observatory | | - | Montjoia |
| 954 | Teide Observatory, Tenerife | | CN | Teide Observatory |
| 955 | Sassoeiros Observatory | | - | Sassoeiros |
| 956 | Pozuelo Observatory (Observatorio Pozuelo) | | - | Observatorio Pozuelo |
| 957 | Merignac Observatory | | - | Merignac |
| 958 | Dax Observatory (Observatoire de Dax) Src | | - | Observatoire de Dax |
| 959 | Ramonville Saint Agne Observatory | | - | Ramonville Saint Agne |
| 960 | Rolvenden Observatory | | ENG | Rolvenden |
| 961 | City Observatory (Calton Hill Observatory) |  | Edinburgh | City Observatory, Calton Hill, Edinburgh |
| 962 | Gandia Observatory | | - | Gandia |
| 963 | Werrington Observatory | | - | Werrington |
| 964 | Southend Bradfield Observatory | | ENG | Southend Bradfield |
| 965 | Algarve Observatory (Portimão Observatory; Observação Astronómica no Algarve; Centro de Observação Astronómica no Algarve; COAA) | | - | Observacao Astronomica no Algarve, Portimao |
| 966 | Church Stretton Observatory | | ENG | Church Stretton |
| 967 | Greens Norton Observatory | | Northamptonshire | Greens Norton |
| 968 | Haverhill Observatory | | Suffolk | Haverhill |
| 969 | George Bishop's Observatory (1836–1861) | | London | London-Regents Park |
| 970 | Chelmsford Observatory | | Essex | Chelmsford |
| 971 | Lisbon Observatory | | - | Lisbon |
| 972 | Dun Echt Observatory | | SCT | Dun Echt |
| 973 | Harrow Observatory | | Greater London | Harrow |
| 974 | Genoa Observatory | | - | Genoa |
| 975 | Valencia Observatory | | V | Observatorio Astronomico de Valencia |
| 976 | Leamington Spa Observatory | | - | Leamington Spa |
| 977 | Markree Observatory, County Sligo |  | - | Markree |
| 978 | Conder Brow Observatory | | Lancashire | Conder Brow |
| 979 | South Wonston Observatory | | - | South Wonston |
| 980 | Lancaster Observatory | | - | Lancaster |
| 981 | Armagh Observatory | | NIR | Armagh |
| 982 | Dunsink Observatory | | - | Dunsink Observatory, Dublin |
| 983 | Real Instituto y Observatorio de la Armada | | - | San Fernando |
| 984 | Eastfield Observatory | | - | Eastfield |
| 985 | Telford Observatory | | - | Telford |
| 986 | Ascot Observatory Src | | ENG | Ascot |
| 987 | The Isle of Man Observatory (The Isle of Man Astronomical Society) Src | | - | Isle of Man Observatory, Foxdale |
| 988 | Glasgow Observatory | | SCT | Glasgow |
| 989 | Wilfred Hall Observatory | | ENG | Wilfred Hall Observatory, Preston |
| 990 | Royal Observatory of Madrid–Spanish National Observatory (Madrid Observatory; Observatorio Astronómico de Madrid) | | MD | Madrid |
| 991 | Liverpool Observatory (since 1867) | | ENG | Liverpool (since 1867) |
| 992 | Liverpool Observatory (before 1867) | | ENG | Liverpool (before 1867) |
| 993 | Woolston Observatory | | - | Woolston Observatory |
| 994 | Godalming Observatory | | - | Godalming |
| 995 | Durham University Observatory | | - | Durham |
| 996 | Radcliffe Observatory (moved to South Africa in 1939) | | - | Oxford |
| 997 | Hartwell Observatory Src | | ENG | Hartwell |
| 998 | UCL Observatory (University of London Observatory; London-Mill Hill Observatory) | | - | London-Mill Hill |
| 999 | Bordeaux Observatory (Observatoire de Bordeaux) | | NA | Bordeaux-Floirac |
| A00 | Gravesend Observatory | | - | Gravesend |
| A01 | Masia Cal Maciarol Modul 2 | | - | Masia Cal Maciarol Modul 2 |
| A02 | Masia Cal Maciarol Modul 8 | | - | Masia Cal Maciarol Modul 8 |
| A03 | Torredembarra | | CT | Torredembarra |
| A04 | Saint-Caprais | | Gironde | Saint-Caprais |
| A05 | Bélesta Observatory (Observatoire de Bélesta), Ariège | | - | Belesta |
| A06 | Mataró | | CT | Mataro |
| A07 | Uranoscope Observatory or Gretz-Armainvilliers Observatory; observer: Arnaud Leroy [2] | | IDF | Gretz-Armainvilliers |
| A08 | Malibert | | - | Malibert |
| A09 | Quincampoix | | Normandy | Quincampoix |
| A10 | Observatorio Astronómico de Conbera Src | | CT | Observatorio Astronomico de Corbera |
| A11 | Wormhout | | Nord | Wormhout |
| A12 | Sozzago Astronomical Station (Stazione Astronomica di Sozzago); observers: Federico Manzini, Roberto Crippa [2] | | P | Stazione Astronomica di Sozzago |
| A13 | Observatory Naef Épendes (Observatoire Robert A. Naef), Épendes | | SWF | Observatoire Naef, Épendes |
| A14 | Les Engarouines Observatory (Observatoire des Engarouines), Mallemort; observer: Laurent Bernasconi | | - | Les Engarouines Observatory |
| A15 | Josef Bresser Observatory (Josef-Bresser Sternwarte) Src | | NRW | Josef Bresser Sternwarte, Borken |
| A16 | Tentlingen Observatory (Sternwarte Tentlingen) Src | | SWF | Tentlingen |
| A17 | Guidestar Observatory | | BW | Guidestar Observatory, Weinheim |
| A18 | Herne Observatory | | NRW | Herne |
| A19 | Köln Observatory | | NRW | Koln |
| A20 | Sögel Observatory | | NI | Sogel |
| A21 | Irmtraut Observatory | | RP | Irmtraut |
| A22 | Starkenburg Observatory Heppenheim Asteroid Survey (SOHAS) (Starkenburg Sternwarte-SOHAS, see #611) Src | | - | Starkenburg Sternwarte-SOHAS |
| A23 | Weinheim Observatory (Sternwarte Weinheim) Src) | | - | Weinheim |
| A24 | New Millennium Observatory | | Lo | New Millennium Observatory, Mozzate |
| A25 | Nova Milanese | | Lo | Nova Milanese |
| A26 | Darmstadt Observatory | | HE | Darmstadt |
| A27 | Eridanus Observatory | | NI | Eridanus Observatory, Langelsheim |
| A28 | Kempten Observatory | | FB | Kempten |
| A29 | Santa Maria a Monte | | Tu | Santa Maria a Monte |
| A30 | Crespadoro Observatory | | V | Crespadoro |
| A31 | Corcaroli Observatory | | - | Corcaroli Observatory |
| A32 | Panker Observatory | | - | Panker |
| A33 | Kirchheim Observatory (Volkssternwarte Kirchheim) Src | | - | Volkssternwarte Kirchheim |
| A34 | Grosshabersdorf | | FB | Grosshabersdorf |
| A35 | Hormersdorf Observatory | | SN | Hormersdorf Observatory |
| A36 | Ganda di Aviatico | | Lo | Ganda di Aviatico |
| A37 | Müggelheim | | B | Mueggelheim |
| A38 | Campocatino Automated Telescope | | - | Campocatino Automated Telescope, Collepardo |
| A39 | Altenburg Observatory | | TH | Altenburg |
| A40 | Pieta Observatory | | - | Pieta |
| A41 | Rezman Observatory Src | | - | Rezman Observatory, Kamnik |
| A42 | Gehrden Observatory | | - | Gehrden |
| A43 | Inastars Observatory (before 2006) Src | | - | Inastars Observatory, Potsdam (before 2006) |
| A44 | Altschwendt Observatory | | UA | Altschwendt |
| A45 | Karrenkneul | | - | Karrenkneul |
| A46 | Lelekovice | | - | Lelekovice |
| A47 | Matera | | - | Matera |
| A48 | Povegliano Veronese | | - | Povegliano Veronese |
| A49 | Uppsala University-Ångström Laboratory | | - | Uppsala-Angstrom |
| A50 | Andrushivka Astronomical Observatory | | - | Andrushivka Astronomical Observatory |
| A51 | Danzig Observatory | | - | Danzig |
| A52 | Etyek Observatory | | - | Etyek |
| A53 | Peschiera del Garda Observatory | | - | Peschiera del Garda |
| A54 | Ostrorog Observatory | | - | Ostrorog |
| A55 | Vallemare di Borbona Observatory (Osservatorio Astronomico Vallemare di Borbona) src | | - | Osservatorio Astronomico Vallemare di Borbona |
| A56 | Parma Observatory | | - | Parma |
| A57 | Margherita Hack Observatory (Osservatorio Astronomico Margherita Hack) | | - | Osservatorio Astron. Margherita Hack, Firenze |
| A58 | Chalandray-Canotiers Observatory (Observatoire de Chalandray-Canotiers) | | - | Observatoire de Chalandray-Canotiers |
| A59 | Karlovy Vary Observatory | | - | Karlovy Vary Observatory |
| A60 | Yonsei Survey Telescopes for Astronomical Research (YSTAR) | | NC | YSTAR-NEOPAT Station, Sutherland |
| A61 | Tortona Observatory | | P | Tortona |
| A62 | Aichtal Observatory | | BW | Aichtal |
| A63 | Cosmosoz Observatory | | Lyon | Cosmosoz Obs., Tassin la Demi Lune |
| A64 | Couvaloup de St-Cergue Observatory | | - | Couvaloup de St-Cergue |
| A65 | Le Couvent de Lentin Observatory | | - | Le Couvent de Lentin |
| A66 | Livorno Observatory (Stazione Osservativa Astronomica, Livorno) | | Tu | Stazione Osservativa Astronomica, Livorno |
| A67 | Chiusa di Pesio Observatory | | - | Chiusa di Pesio |
| A68 | Swedenborg Observatory | | - | Swedenborg Obs., Bockholmwik |
| A69 | Osservatorio Palazzo Bindi Sergardi | | - | Osservatorio Palazzo Bindi Sergardi |
| A70 | Lumijoki | | Ostrobothnia | Lumijoki |
| A71 | Stixendorf | | - | Stixendorf |
| A72 | Radebeul Observatory (Sternwarte "Adolph Diesterweg" Radebeul) | | - | Radebeul Observatory |
| A73 | Penzing Astrometric Observatory | | Vi | Penzing Astrometric Obs., Vienna |
| A74 | Bergen-Enkheim Observatory Src | | - | Bergen-Enkheim Observatory |
| A75 | Fort Pius Observatory | | CT | Fort Pius Observatory, Barcelona |
| A76 | Andromeda Observatory | | - | Andromeda Observatory, Miskolc |
| A77 | Chante-Perdrix Observatory (Observatoire Chante-Perdrix); observers: Jérôme Caron, François Kugel [2] | | Haute-Provence | Observatoire Chante-Perdrix, Dauban |
| A78 | Stia | | - | Stia |
| A79 | Obshtestvo Observatory Zvezdno Src | | - | Zvezdno Obshtestvo Observatory, Plana |
| A80 | Lindenberg Observatory | | BB | Lindenberg Observatory |
| A81 | Balzaretto Observatory | | La | Balzaretto Observatory, Rome |
| A82 | Astronomical Observatory of Trieste (Osservatorio Astronomico di Trieste) | | - | Osservatorio Astronomico di Trieste |
| A83 | Jakokoski Observatory | | - | Jakokoski Observatory |
| A84 | TÜBİTAK National Observatory | | - | TUBITAK National Observatory |
| A85 | Odesa Astronomical Observatory | | - | Odesa Astronomical Observatory, Kryzhanivka, Odesa Oblast |
| A86 | Albigneux Observatory | | - | Albigneux |
| A87 | Rimbach Observatory | | - | Rimbach |
| A88 | Bolzaneto Observatory | | Li | Bolzaneto |
| A89 | Sterni Observatory | | FB | Sterni Observatory, Kempten |
| A90 | Sant Gervasi Observatory; observer: Hilari Pallares [2] | | CT | Sant Gervasi Observatory, Barcelona |
| A91 | Hankasalmi Observatory | | - | Hankasalmi Observatory |
| A92 | Urseanu Observatory | | - | Urseanu Observatory, Bucharest |
| A93 | Lucca Observatory | | - | Lucca |
| A94 | Cormons Observatory | | - | Cormons |
| A95 | Taurus Hill Observatory Src | | EF | Taurus Hill Observatory, Varkaus |
| A96 | Klosterneuburg Observatory | | LA | Klosterneuburg |
| A97 | Stammersdorf Observatory | | Vi | Stammersdorf |
| A98 | Taurus-1 Observatory |  | - | Taurus-1 Observatory, Baran |
| A99 | Monte Baldo Observatory (Osservatorio del Monte Baldo) | | - | Osservatorio del Monte Baldo |
| B00 | Savigny-le-Temple Observatory, observer: Patrick Sogorb [2] | | - | Savigny-le-Temple |
| B01 | Taunus Observatory (Taunus-Sternwarte) Src | | - | Taunus Observatory, Frankfurt |
| B02 | Kielce Observatory | | - | Kielce |
| B03 | Alter Satzberg Observatory | | Vi | Alter Satzberg, Vienna |
| B04 | OAVdA Observatory (Osservatorio Astrononomico della Regione Autonoma Valle d'Aosta), Aosta Valley Src Archived 2017-12-27 at the Wayback Machine | | - | OAVdA, Saint-Barthelemy |
| B05 | Ka-Dar Observatory, Barybino Src | | Moscow | Ka-Dar Observatory, Barybino |
| B06 | Montseny Astronomical Observatory Src | | - | Montseny Astronomical Observatory |
| B07 | Camorino Observatory | | SWI | Camorino |
| B08 | San Lazzaro di Savena Observatory | | ER | San Lazzaro di Savena |
| B09 | Capannoli, Pietro Dora Vivarelli ASA Src | | - | Capannoli |
| B10 | Observatoire du Mas des Gres, Moydans (LightBuckets as of November 2011) Src | | - | Observatoire des Baronnies Provencales, Moydans |
| B11 | Cima Rest Observatory (Osservatorio Cima Rest), Imola | | Lo | Osservatorio Cima Rest, Magasa |
| B12 | Koschny Observatory Src | | Zuid Holland | Koschny Observatory, Noordwijkerhout |
| B13 | Osservatorio di Tradate | | Lo | Osservatorio di Tradate |
| B14 | Ca del Monte Observatory Src Archived 2019-06-27 at the Wayback Machine | | - | Ca del Monte |
| B15 | Inastars Observatory Src | | - | Inastars Observatory, Potsdam (since 2006) |
| B16 | 1st Moscow Gymnasium Observatory, Lipki | | Moscow | 1st Moscow Gymnasium Observatory, Lipki |
| B17 | AZT-8 Yevpatoria | | - | AZT-8 Yevpatoria |
| B18 | Terskol Observatory, on Mount Elbrus Src | | North Caucasus | Terskol |
| B19 | Observatori Iluro, Mataró | | CT | Observatorio Iluro, Mataro |
| B20 | Observatori Carmelita, Tiana | | - | Observatorio Carmelita, Tiana |
| B21 | Gaisberg Observatory (Sternwarte Gaisberg) in Schärding: observer Richard Gierlinger | | UA | Gaisberg Observatory, Schaerding |
| B22 | Observatori d'Àger, Barcelona | | CT | Observatorio d'Ager |
| B23 | Fiamene Src | | - | Fiamene |
| B24 | Cesson | | - | Cesson |
| B25 | Catania | | - | Catania |
| B26 | Observatoire des Terres Blanches, Reillanne | | AHP | Observatoire des Terres Blanches, Reillanne |
| B27 | Picard Observatory, St. Veit | | - | Picard Observatory, St. Veit |
| B28 | Mandi Observatory, Pagnacco | | F | Mandi Observatory, Pagnacco |
| B29 | L'Ampolla Observatory, Tarragona | | - | L'Ampolla Observatory, Tarragona |
| B30 | Szamotuly-Galowo | | - | Szamotuly-Galowo |
| B31 | Southern African Large Telescope (SALT), Sutherland | | NC | Southern African Large Telescope, Sutherland |
| B32 | Gelenau Observatory, Src | | SN | Gelenau |
| B33 | Libbiano Observatory, Peccioli AAAV | | - | Libbiano Observatory, Peccioli |
| B34 | Green Island Observatory, Geçitkale Src [ usurped ] |  | - | Green Island Observatory, Gecitkale |
| B35 | Bareket Observatory, Macabim | | - | Bareket Observatory, Macabim |
| B36 | Redshed Observatory, Kallham | | UA | Redshed Observatory, Kallham |
| B37 | Ametlla del Valles Observatory (Observatorio de L' Ametlla del Vallès), Barcelona; observer: Antonio Garrigós-Sánchez | | CT | Obs. de L' Ametlla del Valles, Barcelona |
| B38 | Santa Mama | | - | Santa Mama |
| B39 | Tradate | | - | Tradate |
| B40 | Skylive Observatory, Catania Italy Gruppo Astrofili Catanesi Src | | - | Skylive Observatory, Catania |
| B41 | Zlín Observatory | | - | Zlín Observatory |
| B42 | Vitebsk | | - | Vitebsk |
| B43 | Hennef | | - | Hennef |
| B44 | Eygalayes | | - | Eygalayes |
| B45 | Narama | | - | Narama |
| B46 | Sintini Observatory, Argenta | | - | Sintini Observatory, Alfonsine |
| B47 | Metsala Observatory, Espoo | | - | Metsala Observatory, Espoo |
| B48 | Bocholt | | - | Bocholt |
| B49 | Paus Observatory, Sabadell | | - | Paus Observatory, Sabadell |
| B50 | Corner Observatory, Durmersheim | | - | Corner Observatory, Durmersheim |
| B51 | Vallauris | | - | Vallauris |
| B52 | Observatorio El Far | | - | Observatorio El Far |
| B53 | Casal Lumbroso, Rome | | La | Casal Lumbroso, Rome |
| B54 | Àger | | - | Ager |
| B55 | Comeglians | | - | Comeglians |
| B56 | Observatorio Sant Pere, Mataró | | - | Observatorio Sant Pere, Mataro |
| B57 | Laietania Observatory, Parets del Vallès | | - | Laietania Observatory, Parets del Valles |
| B58 | Polaris Observatory, Budapest | | - | Polaris Observatory, Budapest |
| B59 | Borken | | - | Borken |
| B60 | Deep Sky Observatorium, Bad Bentheim | | - | Deep Sky Observatorium, Bad Bentheim |
| B61 | Valldoreix Observatory, Sant Cugat del Valles | | CT | Valldoreix Obs., Sant Cugat del Valles |
| B62 | Brelingen | | NI | Brelingen |
| B63 | Solaris Observatory, Luczanowice | | K | Solaris Observatory, Luczanowice |
| B64 | Slope Rock Observatory, Hyvinkää | | - | Slope Rock Observatory, Hyvinkaa |
| B65 | Komakallio Observatory, Kirkkonummi | | Uusimaa | Komakallio Observatory, Kirkkonummi |
| B66 | Osservatorio Astronomico Naturalistico di Casasco "A. Zanassi" Src | | - | Osservatorio di Casasco |
| B67 | Mirasteilas Observatory (Sternwarte Mirasteilas) | | SWG | Sternwarte Mirasteilas, Falera |
| B68 | Mount Matajur Observatory | | - | Mount Matajur Observatory |
| B69 | Owls and Ravens Observatory, Holzgerlingen Src | | BW | Owls and Ravens Observatory, Holzgerlingen |
| B70 | Sant Celoni | | - | Sant Celoni |
| B71 | Observatorio El Vendrell | | - | Observatorio El Vendrell |
| B72 | Soerth | | - | Soerth |
| B73 | Mauren Valley Observatory, Holzgerlingen Src | | - | Mauren Valley Observatory, Holzgerlingen |
| B74 | Santa Maria de Montmagastrell Observatory (Remote Observatory Santa Maria de Montmagastrell), Tàrrega Src | | CT | Santa Maria de Montmagastrell |
| B75 | Stazione Astronomica Betelgeuse, Magnago | | - | Stazione Astronomica Betelgeuse, Magnago |
| B76 | Sternwarte Schönfeld, Dresden | | - | Sternwarte Schonfeld, Dresden |
| B77 | Schafmatt Observatory, Aarau Src | | SWG | Schafmatt Observatory, Aarau |
| B78 | Astrophoton Observatory, Audorf | | - | Astrophoton Observatory, Audorf |
| B79 | Marana Observatory | | - | Marana Observatory |
| B80 | Osservatorio Astronomico Campomaggiore | | B | Osservatorio Astronomico Campomaggiore |
| B81 | Observatorio Astronómico Caimari Src observers: Mateu Cerda, Mateu Esteban, Pére Antoni Salom | | - | Caimari |
| B82 | Maidbronn Observatory | | FB | Maidbronn |
| B83 | Gières Observatory | | ARA | Gieres |
| B84 | Cyclops Observatory, Oostkapelle | | Zeeland | Cyclops Observatory, Oostkapelle |
| B85 | Beilen Observatory | | Drenthe | Beilen Observatory |
| B86 | Hagen Observatory (Volkssternwarte Hagen) Src; also note: #607 | | NRW | Sternwarte Hagen |
| B87 | Banyoles Observatory | | CT | Banyoles |
| B88 | Bigmuskie Observatory | | P | Bigmuskie Observatory, Mombercelli |
| B89 | Observatori Astronòmic de Tiana, Barcelona | | CT | Observatori Astronomic de Tiana |
| B90 | Malina River Observatory, Povoletto | | F | Malina River Observatory, Povoletto |
| B91 | Bollwiller | | Haut-Rhin | Bollwiller |
| B92 | Chinon Observatory (Observatoire de Chinon); observer: Maurice Audejean [2] | | CVL | Chinon |
| B93 | Hoogeveen | | Drenthe | Hoogeveen |
| B94 | Petrozavodsk Src | | - | Petrozavodsk |
| B95 | Achternholt | | NI | Achternholt |
| B96 | Brixiis Observatory, Kruibeke | | - | Brixiis Observatory, Kruibeke |
| B97 | Sterrenwacht Andromeda | | Drenthe | Sterrenwacht Andromeda, Meppel |
| B98 | Siena | | Tu | Siena |
| B99 | Santa Coloma de Gramenet | | CT | Santa Coloma de Gramenet |
| C00 | Velikie Luki Observatory | | - | Velikie Luki |
| C01 | Lohrmann Observatory (Lohrmann-Observatorium) | | - | Lohrmann-Observatorium, Triebenberg |
| C02 | Royal Park Observatory (Observatorio Royal Park) | | - | Observatorio Royal Park |
| C03 | Clayhole Observatory Src | | - | Clayhole Observatory, Jokela |
| C04 | Observatory Kramatorsk | | - | Kramatorsk |
| C05 | Königsleiten Observatory | | - | Konigsleiten |
| C06 | Krasnoyarsk Observatory (Siberian State Aerospace University Src Archived 2020-11-27 at the Wayback Machine ) | | - | Krasnoyarsk |
| C07 | Anysllum Observatory Src | | - | Anysllum Observatory, Àger |
| C08 | Fiby Observatory | | - | Fiby |
| C09 | Rouet Observatory | | - | Rouet |
| C10 | Maisoncelles Observatory Src | | - | Maisoncelles |
| C11 | City Observatory | | - | City Observatory, Slaný |
| C12 | Berta Observatory | | - | Berta Observatory, Sabadell |
| C13 | Como Observatory | | - | Como |
| C14 | Sky Vistas Observatory | | - | Sky Vistas Observatory, Eichgraben |
| C15 | ISON-Ussuriysk Src | | - | ISON-Ussuriysk Observatory |
| C16 | Isarwinkel Observatory | | - | Isarwinkel Observatory, Bad Tölz |
| C17 | Joan Roget Observatory (Observatorio Joan Roget) Src | | - | Observatorio Joan Roget, Àger |
| C18 | Frasnes-Lez-Anvaing Observatory | | - | Frasnes-Lez-Anvaing |
| C19 | ROSA Observatory | | - | ROSA Observatory, Vaucluse |
| C20 | Kislovodsk Mtn. Astronomical Station of the Pulkovo Obs. | | - | Kislovodsk Mtn. Astronomical Stn., Pulkovo Obs. |
| C21 | Via Lactea Observatory (Observatorio Via Lactea) | | - | Observatorio Via Lactea, Àger |
| C22 | Oberwiesenthal Observatory | | - | Oberwiesenthal |
| C23 | Olmen Observatory | | - | Olmen |
| C24 | Seveso Observatory | | Lo | Seveso |
| C25 | Pulkovo Observatory Station at Campo Imperatore | | - | Pulkovo Observatory Station, Campo Imperatore |
| C26 | Levendaal Observatory | | Zuid Holland | Levendaal Observatory, Leiden |
| C27 | Pallerols Observatory | | - | Pallerols |
| C28 | Wellinghofen Observatory | | - | Wellinghofen |
| C29 | Les Planes de Son Observatory (Observatori Astronómic de Les Planes de Son) | | - | Observatori Astronomic de Les Planes de Son |
| C30 | Sheltozero Station of the Petrozavodsk University Obs. | | - | Petrozavodsk University Obs., Sheltozero Stn. |
| C31 | Neanderhoehe Hochdahl Observatory (Sternwarte Neanderhoehe Hochdahl e.V.) | | - | Sternwarte Neanderhoehe Hochdahl e.V., Erkrath |
| C32 | Ka-Dar Observatory , TAU Station Src | | - | Ka-Dar Observatory, TAU Station, Nizhny Arkhyz |
| C33 | CEAM Observatory (Observatorio CEAM) | | CN | Observatorio CEAM, Caimari |
| C34 | Baja Astronomical Observatory | | - | Baja Astronomical Observatory |
| C35 | Terrassa Observatory | | - | Terrassa |
| C36 | Starry Wanderer Observatory | | - | Starry Wanderer Observatory, Baran' |
| C37 | Stowupland Observatory | | ENG | Stowupland |
| C38 | Varuna Observatory | | - | Varuna Observatory, Cuorgnè |
| C39 | Nijmegen Observatory | | Gelderland | Nijmegen |
| C40 | Kuban State University Astrophysical Observatory | | - | Kuban State University Astrophysical Observatory |
| C41 | MASTER-II Observatory (at Pulkovo Observatory; #084) | | - | MASTER-II Observatory, Kislovodsk |
| C42 | Xingming Observatory | | - | Xingming Observatory, Mt. Nanshan |
| C43 | Hoyerswerda Observatory | | - | Hoyerswerda |
| C44 | A. Volta Observatory | | - | A. Volta Observatory, Lanzo d'Intelvi |
| C45 | MPC1 Cassia Observatory Src | | - | MPC1 Cassia Observatory, La Giustiniana |
| C46 | Horizon Observatory | | - | Horizon Observatory, Petropavlovsk |
| C47 | Nonndorf Observatory Src | | - | Nonndorf |
| C48 | Sayan Solar Observatory | | - | Sayan Solar Observatory, Irkutsk |
| C49 | STEREO-A (space observatory) | SPACE | Earth-trailing | STEREO-A |
| C50 | STEREO-B (space observatory) | SPACE | Earth-trailing | STEREO-B |
| C51 | WISE (space observatory) | SPACE | Sun-synchronous | WISE |
| C52 | Swift (space observatory) | SPACE | LEO | Swift |
| C53 | NEOSSat (space observatory) | SPSPACEACE | Sun-synchronous | NEOSSat |
| C54 | New Horizons (space observatory) | SPACE | deep space | New Horizons |
| C55 | Kepler (space observatory) | SPACE | - | Kepler |
| C56 | LISA Pathfinder (space observatory) | SPACE | - | LISA-Pathfinder |
| C57 | TESS (space observatory) | SPACE | High Earth | TESS |
| C59 | Yang Wang-1 (Src) | SPACE | LEO? | Yangwang-1 |
| C60 | Argelander Institute for Astronomy Observatory | | - | Argelander Institute for Astronomy Obs., Bonn |
| C61 | Chelles Observatory | | - | Chelles |
| C62 | Eurac Observatory, observer: Titouan [2] | | - | Eurac Observatory, Bolzano |
| C63 | Giuseppe Piazzi Observatory | | - | Giuseppe Piazzi Observatory, Ponte in Valtellina |
| C64 | Puchenstuben Observatory | | - | Puchenstuben |
| C65 | Montsec Observatory (Observatori Astronòmic del Montsec) | | - | Observatori Astronomic del Montsec |
| C66 | El Cielo de Consell Observatory (Observatorio El Cielo de Consell) | | IB | Observatorio El Cielo de Consell |
| C67 | Gnevsdorf Observatory | | - | Gnevsdorf |
| C68 | Ellinogermaniki Agogi Observatory Src | | - | Ellinogermaniki Agogi Observatory, Pallini |
| C69 | Bayerwald Observatory (Bayerwald Sternwarte) | | - | Bayerwald Sternwarte, Neuhütte |
| C70 | Uiterstegracht Station | | Zuid Holland | Uiterstegracht Station, Leiden |
| C71 | Sant Marti Sesgueioles Observatory | | - | Sant Marti Sesgueioles |
| C72 | Palestrina Observatory | | - | Palestrina |
| C73 | Galați Observatory Src | | - | Galati Observatory |
| C74 | El Teatrillo de Lyra Observatory (Observatorio El Teatrillo de Lyra) | | - | Observatorio El Teatrillo de Lyra, Àger |
| C75 | Whitestar Observatory | | - | Whitestar Observatory, Borgobello |
| C76 | Estels Observatory (Observatorio Estels) | | - | Observatorio Estels, Àger |
| C77 | Bernezzo Observatory | | - | Bernezzo Observatory |
| C78 | Martin S. Kraar Observatory | | - | Martin S. Kraar Observatory, Rehovot |
| C79 | Roser Observatory | | - | Roser Observatory, Blanes |
| C80 | Don Astronomical Observatory | | - | Don Astronomical Observatory, Rostov-on-Don |
| C81 | Dolomites Astronomical Observatory | | - | Dolomites Astronomical Observatory |
| C82 | Nastro Verde Observatory (Osservatorio Astronomico Nastro Verde) | | - | Osservatorio Astronomico Nastro Verde, Sorrento |
| C83 | Badalozhnyj Observatory | | - | Badalozhnyj Observatory |
| C84 | Badalona Observatory | | - | Badalona |
| C85 | Cala d'Hort Observatory (Observatorio Cala d'Hort) | | - | Observatorio Cala d'Hort, Ibiza |
| C86 | Blanes Observatory | | - | Blanes |
| C87 | Rimbach Observatory | | - | Rimbach |
| C88 | Montarrenti Observatory | | - | Montarrenti Observatory, Siena |
| C89 | Astronomical Station Vidojevica | | - | Astronomical Station Vidojevica |
| C90 | Vinyols Observatory | | - | Vinyols |
| C91 | Montevenere Observatory | | - | Montevenere Observatory, Monzuno |
| C92 | Valdicerro Observatory | | - | Valdicerro Observatory, Loreto |
| C93 | Bellavista Observatory | | - | Bellavista Observatory, L'Aquila |
| C94 | MASTER-II Observatory | | - | MASTER-II Observatory, Tunka |
| C95 | SATINO Remote Observatory | | PACA | SATINO Remote Observatory, Haute Provence |
| C96 | OACL Observatory | | - | OACL Observatory, Mosciano Sant Angelo |
| C97 | Al-Fulaij Observatory |  | - | Al-Fulaij Observatory, Oman |
| C98 | Casellina Observatory (Osservatorio Casellina) | | - | Osservatorio Casellina, Scandicci |
| C99 | Can Roig Observatory (Observatori Can Roig) | | - | Observatori Can Roig, Llagostera |
| D00 | ASC-Kislovodsk Observator (formerly ISON-Kislovodsk Observatory) Src | | - | ASC-Kislovodsk |
| D01 | Andean Northern Observatory | | - | Andean Northern Observatory, Nummi-Pusula |
| D02 | Petit Sant Feliu Observatory (Observatori Petit Sant Feliu), Sant Feliu de Llobregat | | CT | Observatori Petit Sant Feliu |
| D03 | Rantiga Observatory (Rantiga Osservatorio) Carpineti | | - | Rantiga Osservatorio, Tincana |
| D04 | Krasnodar Observatory | | - | Krasnodar |
| D05 | ISON-Terskol Observatory | | - | ISON-Terskol Observatory |
| D06 | Tuscolana Association of Astronomy (Associazione Tuscolana di Astronomia) | | - | Associazione Tuscolana di Astronomia, Domatore |
| D07 | Wegberg Observatory | | NRW | Wegberg |
| D08 | Ghezz Observatory Src | | SWI | Ghezz Observatory, Leontica |
| D09 | Observatory Grömme Src | | - | Observatory Gromme, Maasmechelen |
| D10 | Gaertringen Observatory, Gärtringen | | BW | Gaertringen |
| D11 | Bastidan Observatory | | Marseille | Bastidan Observatory |
| D12 | Filzi School Observatory | | S.Tirol | Filzi School Observatory, Laives |
| D13 | Cat's Eye Observatory | | Toscana | Cat's Eye Observatory |
| D14 | Nanchuan Observatory | | - | Nanchuan Observatory, Guangzhou |
| D15 | F. Schiller-Gymnasium Observatory (Sternwarte Friedrich-Schiller-Gymnasium) | | TH | Sternwarte F.Schiller-Gymnasium, Weimar |
| D16 | Po Leung Kuk Observatory |  | HK | Po Leung Kuk Observatory, Tuen Mun |
| D17 | Hong Kong Observatory | | HK | Hong Kong |
| D18 | Mount Guizi Observatory | | - | Mt. Guizi Observatory |
| D19 | Hong Kong Space Museum | | HK | Hong Kong Space Museum, Tsimshatsui |
| D20 | Zadko Observatory | | WA | Zadko Observatory, Wallingup Plain |
| D21 | Shenton Park Observatory | | WA | Shenton Park |
| D22 | UWA Observatory | | WA | UWA Observatory, Crawley |
| D24 | LightBuckets Observatory | | WA | LightBuckets Observatory, Pingelly |
| D25 | Tzec Maun Observatory Src Archived 2021-01-26 at the Wayback Machine | | WA | Tzec Maun Observatory, Pingelly (before 2010) |
| D29 | PMO NEO Survey Program at the XuYi Station of the Purple Mountain Observatory | | - | Purple Mountain Observatory, XuYi Station |
| D32 | JiangNanTianChi Observatory | | - | JiangNanTianChi Observatory, Mt. Getianling |
| D33 | Kenting Observatory at Checheng Src Archived 2018-08-23 at the Wayback Machine | | - | Kenting Observatory, Checheng |
| D34 | Kenting Observatory at Hengchun | | - | Kenting Observatory, Hengchun |
| D35 | Lulin Observatory | | - | Lulin Observatory |
| D36 | Tataka Observatory | | - | Tataka, Mt. Yu-Shan National Park |
| D37 | Lulin Widefield Telescope, see #D35 | | - | Lulin Widefield Telescope, Mt. Lulin |
| D39 | Shandong University Observatory | | Weihai | Shandong University Observatory, Weihai |
| D44 | Ishigakijima Astronomical Observatory Src | | 47 | Ishigakijima Astronomical Observatory |
| D53 | ISON-Blagovechensk Observatory | | - | ISON-Blagoveschensk Observatory |
| D54 | MASTER-II Observatory | | - | MASTER-II Observatory, Blagoveshchensk |
| D55 | Kangwon Science High School Observatory | | - | Kangwon Science High School Observatory, Ksho |
| D57 | Gimhae Astronomical Observatory | | - | Gimhae Astronomical Observatory, Uhbang-dong |
| D58 | KSA SEM Observatory | | - | KSA SEM Observatory, Danggam-dong |
| D61 | Suntopia Marina Observatory | | - | Suntopia Marina, Sumoto |
| D62 | Miyaki-Argenteus Observatory | | - | Miyaki-Argenteus |
| D63 | G. Pascoli Observatory | | - | G. Pascoli Observatory, Castelvecchio Pascoli |
| D69 | JMU Space-Observatory (University of Würzburg) | | FB | JMU Space-Observatory |
| D70 | Tosa Observatory | | - | Tosa |
| D74 | Nakagawa Observatory (Anan Science Center Nakagawa Observatory; Nakagawa Science Center Nakagawa Observatory) | | - | Nakagawa |
| D78 | Iga-Ueno Observatory | | - | Iga-Ueno |
| D79 | YSVP Observatory | | SA | YSVP Observatory, Vale Park |
| D80 | Gumma Astronomical Observatory (CHECK with: Gunma Astronomical Observatory, HP) | | 10 | Gumma Astronomical Observatory |
| D81 | Nagano Observatory | | 20 | Nagano |
| D82 | Wallaroo Observatory | | SA | Wallaroo |
| D83 | Miwa Observatory | | - | Miwa |
| D84 | Hallet Cove Observatory | | SA | Hallet Cove |
| D85 | Ingle Farm Observatory | | SA | Ingle Farm |
| D86 | Penwortham Observatory | | SA | Penwortham |
| D87 | Brooklyn Park Observatory | | SA | Brooklyn Park |
| D88 | Hiratsuka Observatory | | - | Hiratsuka |
| D89 | Yamagata Astronomical Observatory (Yamagata Tenmondai) | | 06 | Yamagata |
| D90 | RAS Observatory | | SA | RAS Observatory, Moorook |
| D91 | Hamanowa Astronomical Observatory (HAO), observers: Hiromi Hamanowa, Hiroko Hamanowa Src | | 13 | Adati |
| D92 | Osaki Observatory | | - | Osaki |
| D93 | Sendai Astronomical Observatory | | - | Sendai Astronomical Observatory |
| D94 | Takanezawa Observatory | | 09 | Takanezawa, Tochigi |
| D95 | Kurihara Observatory | | - | Kurihara |
| D96 | Tzec Maun Observatory Src Archived 2021-01-26 at the Wayback Machine | | SA | Tzec Maun Observatory, Moorook |
| D97 | Berri Observatory | | SA | Berri |
| E00 | Castlemaine Observatory | | Vic | Castlemaine |
| E01 | South Yarra (Barfold) | | Vic | Barfold |
| E03 | RAS Observatory | | Vic | RAS Observatory, Officer |
| E04 | Pacific Sky Observatory, Northern Mariana Islands | | MP | Pacific Sky Observatory, Saipan |
| E05 | Earl Hill Observatory | | Qld | Earl Hill Observatory, Trinity Beach |
| E07 | Murrumbateman Observatory | | NSW | Murrumbateman |
| E08 | Wobblesock Observatory | | NSW | Wobblesock Observatory, Coonabarabran |
| E09 | Oakley Southern Sky Observatory | | NSW | Oakley Southern Sky Observatory, Coonabarabran |
| E10 | Faulkes Telescope South at Siding Spring | | NSW | Siding Spring-Faulkes Telescope South |
| E11 | Frog Rock Observatory | | NSW | Frog Rock Observatory, Mudgee |
| E12 | Siding Spring Survey | | NSW | Siding Spring Survey |
| E13 | Wanniassa Observatory | | ACT | Wanniassa |
| E14 | Hunters Hill Observatory; observer: David Higgins | | ACT | Hunters Hill Observatory, Ngunnawal |
| E15 | Magellan Observatory | | NSW | Magellan Observatory, near Goulburn |
| E16 | Grove Creek Observatory | | NSW | Grove Creek Observatory, Trunkey |
| E17 | Leura Observatory (renamed to "Blue Mountains Observatory", see: #Q68); observer: Julian Oey | | NSW | Leura |
| E18 | BDI Observatory, Bangor | | NSW | BDI Observatory, Regents Park |
| E19 | Kingsgrove Observatory | | NSW | Kingsgrove |
| E20 | Marsfield Observatory | | NSW | Marsfield |
| E21 | Norma Rose Observatory | | Qld | Norma Rose Observatory, Leyburn |
| E22 | University of Southern Queensland Observatory | | Qld | Univ. of Southern Queensland Obs., Mt. Kent |
| E23 | Arcadia Observatory | | NSW | Arcadia |
| E24 | Tangra Observatory | | NSW | Tangra Observatory, St. Clair |
| E25 | Rochedale (APTA) | | Qld | Rochedale (APTA) |
| E26 | RAS Observatory | | Qld | RAS Observatory, Biggera Waters |
| E27 | Thornlands Observatory | | Qld | Thornlands |
| E28 | Kuriwa Observatory | | NSW | Kuriwa Observatory, Hawkesbury Heights |
| E81 | Nelson Observatory | | S | Nelson |
| E83 | Wither Observatory | | N | Wither Observatory, Witherlea |
| E85 | Farm Cove Observatory, Auckland | | Au | Farm Cove |
| E87 | Turitea Observatory | | N | Turitea |
| E89 | Geyserland Observatory, Rotorua Src | | N | Geyserland Observatory, Pukehangi |
| E94 | Possum Observatory Src | | N | Possum Observatory, Gisborne |
| F51 | Pan-STARRS 1 (PS1) at Haleakala Observatory | | HI | Pan-STARRS 1, Haleakala |
| F52 | Pan-STARRS 2 (PS2) at Haleakala Observatory | | HI | Pan-STARRS 2, Haleakala |
| F59 | Ironwood Remote Observatory | | HI | Ironwood Remote Observatory, Hawaii |
| F60 | Ironwood North Observatory | | HI | Ironwood Observatory, Hawaii |
| F65 | Haleakala-Faulkes Telescope North | | HI | Haleakala-Faulkes Telescope North |
| F84 | Hibiscus Observatory, Puna'auia | | - | Hibiscus Observatory, Punaauia |
| F85 | Tiki Observatory, Puna'auia | | - | Tiki Observatory, Punaauia |
| F86 | Moana Observatory, Puna'auia | | - | Moana Observatory, Punaauia |
| G00 | AZM Martinsberg Observatory | | - | AZM Martinsberg, Oed |
| G01 | Oldenburg University Observatory (Universitätssternwarte Oldenburg) | | NI | Universitaetssternwarte Oldenburg |
| G03 | Capricornus Observatory, Csókakő | | - | Capricornus Observatory, Csokako |
| G04 | Schuelerlabor Astronomie St. 7 | | NRW | Schuelerlabor Astronomie St. 7, Wuppertal |
| G05 | Piconcillo Observatory | | AN | Piconcillo, Sierra Morena |
| G06 | Dordrecht, Sterrenburg | | Zuid Holland | Dordrecht, Sterrenburg |
| G07 | Millau Observatory Observatory | | - | Millau Observatory |
| G08 | Les Pedritxes Observatory | | Cat | Observatorio Les Pedritxes, Matadepera |
| G09 | SWF Observatory | | England | SWF Observatory, South Woodham Ferrers |
| G10 | Clavier Observatory | | - | Clavier Observatory, Lora Del Rio |
| G11 | Breitenweg Observatory, Bergisch Gladbach | | NRW | Breitenweg Observatory, Herkenrath |
| G12 | EG Observatory (Sternwarte EG) | | NRW | Sternwarte EG, Lippstadt |
| G13 | Astronomihagen Observatory | | - | Astronomihagen, Fannrem |
| G14 | Novaloop Observatory | | PACA | Novaloop Observatory, Mougins |
| G15 | Magroforte Observatory | | - | Magroforte Observatory, Alessandria |
| G16 | OmegaLab Observatory | | Si | OmegaLab Observatory, Palermo |
| G17 | BAS Observatory | | Tu | BAS Observatory, Scandicci |
| G18 | ALMO Observatory | | ER | ALMO Observatory, Padulle |
| G19 | Immanuel Kant Observatory | | - | Immanuel Kant Observatory, Limbach |
| G20 | Brignoles Observatory | | - | Brignoles Observatory |
| G21 | Castrofilippo Observatory (Osservatorio Castrofilippo) | | - | Osservatorio Castrofilippo |
| G22 | Experimenta Observatory | | - | Experimenta Observatory, Heilbronn |
| G23 | Vulpecula Observatory | | - | Vulpecula Observatory, Budapest |
| G24 | Dettenhausen Observatory | | BW | Dettenhausen |
| G25 | Sherbrooke Observatory | | QC | Sherbrooke |
| G26 | Fushan Observatory | | Shaanxi | Fushan Observatory, Mt Shaohua |
| G27 | Telescope Fabra ROA Montsec (TFRM), Sant Esteve de la Sarga, Lleida | | CT | Fabra Observatory, Montsec |
| G28 | Wyncroft Observatory | | ENG | Wyncroft Observatory, Attleborough |
| G29 | Requena Observatory | | - | Requena |
| G30 | Casselman Observatory | | ON | Casselman |
| G31 | CCAT Trieste Observatory | | - | CCAT Trieste |
| G32 | Elena Remote Observatory | | Af | Elena Remote Observatory, San Pedro de Atacama |
| G33 | Wickede Observatory | | NRW | Wickede |
| G34 | Oberfrauendorf Observatory | | - | Oberfrauendorf |
| G35 | Elephant Head Observatory | | AZ | Elephant Head Observatory, Sahuarita |
| G36 | Calar Alto-CASADO | | - | Calar Alto-CASADO |
| G37 | Lowell Discovery Telescope | | AZ | Lowell Observatory-Lowell Discovery Telescope |
| G38 | La Senda Observatory (Observatorio La Senda) | | CLM | Observatorio La Senda, Cabanillas del Campo |
| G39 | ROAD Observatory | | Af | ROAD, San Pedro de Atacama |
| G40 | Slooh Observatory | | CN | Slooh.com Canary Islands Observatory |
| G41 | Insperity Observatory | | TX | Insperity Observatory, Humble |
| G42 | UAdeC Observatory (Observatorio Astronómico UAdeC; Autonomous University of Coahuila) | | - | Observatorio Astronomico UAdeC, Saltillo |
| G43 | Buenaventura Suarez Observatory (Observatorio Buenaventura Suarez) | | D | Observatorio Buenaventura Suarez, San Luis |
| G44 | Longa Vista Observatory (Observatorio Longa Vista), Itatiba | | SP | Observatorio Longa Vista, São Paulo |
| G45 | Space Surveillance Telescope (SST) (moved in 2017, from Atom Site, NM, USA, to Australia) | | WA | Exmouth, Western Australia |
| G46 | Northwest Florida State College Observatory | | FL | Pinto Valley Observatory |
| G47 | HillTopTop Observatory | | NM | HillTopTop Observatory, Edgewood |
| G48 | Doc Greiner Research Observatory | | NM | Harlingten Research Observatory, Rancho Hildalgo |
| G49 | Minnetonka Observatory | | MN | Minnetonka |
| G50 | Organ Mesa Observatory, observer: Frederick Pilcher [2] | | NM | Organ Mesa Observatory, Las Cruces |
| G51 | Byrne Observatory | | CA | Byrne Observatory, Sedgwick Reserve |
| G52 | Stone Edge Observatory | | CA | Stone Edge Observatory, El Verano |
| G53 | Alder Springs Observatory | | CA | Alder Springs Observatory, Auberry |
| G54 | Hemet Observatory | | CA | Hemet |
| G55 | Bakersfield Observatory | | CA | Bakersfield |
| G56 | Walnut Creek Observatory | | CA | Walnut Creek |
| G57 | Dilbert Observatory | | OR | Dilbert Observatory, Forest Grove |
| G58 | Chabot Space and Science Center | | CA | Chabot Space and Science Center, Oakland |
| G59 | Maiden Lane Observatory | | WA | Maiden Lane Obs., Bainbridge Island |
| G60 | Carroll Observatory | | CA | Carroll Observatory, Montecito |
| G61 | Pleasanton Observatory | | CA | Pleasanton |
| G62 | Sunriver Nature Center Observatory | | OR | Sunriver Nature Center Observatory, Sunriver |
| G63 | Mill Creek Observatory | | OR | Mill Creek Observatory, The Dalles |
| G64 | Blue Canyon Observatory | | CA | Blue Canyon Observatory |
| G65 | Vulcan North Observatory at Lick Observatory | | CA | Vulcan North, Lick Observatory, Mount Hamilton |
| G66 | Lake Forest Observatory | | CA | Lake Forest Observatory, Forest Hills |
| G67 | Rancho del Sol Observatory | | CA | Rancho Del Sol, Camino |
| G68 | Sierra Stars Observatory | | CA | Sierra Stars Observatory, Markleeville |
| G69 | Via Capote Observatory; observer: James W. Brinsfield [2] | | CA | Via Capote Sky Observatory, Thousand Oaks |
| G70 | Francisquito Observatory | | CA | Francisquito Observatory, Los Angeles |
| G71 | Rancho Palos Verdes Observatory | | CA | Rancho Palos Verdes |
| G72 | University Hills Observatory | | CA | University Hills |
| G73 | Mount Wilson-TIE | | CA | Mount Wilson-TIE |
| G74 | Boulder Knolls Observatory | | CA | Boulder Knolls Observatory, Escondido |
| G75 | Starry Knight Observatory | | CA | Starry Knight Observatory, Coto de Caza |
| G76 | Altimira Observatory | | CA | Altimira Observatory, Coto de Caza |
| G77 | Baldwin Lake Observatory | | CA | Baldwin Lake |
| G78 | Desert Wanderer Observatory | | CA | Desert Wanderer Observatory, El Centro |
| G79 | Goat Mountain Astronomical Research Station (GMARS); observer: Robert Stephens (also see #646 and #U81) | | CA | Goat Mountain Astronomical Research Station |
| G80 | Sierra Remote Observatories | | CA | Sierra Remote Observatories, Auberry |
| G81 | Temecula Observatory | | CA | Temecula |
| G82 | SARA Observatory (Southeastern Association for Research in Astronomy) | | AZ | SARA Observatory, Kitt Peak |
| G83 | Large Binocular Telescope | | AZ | Mt. Graham-LBT |
| G84 | Mount Lemmon Sky Center | | AZ | Mount Lemmon SkyCenter |
| G85 | Vermillion Cliffs Observatory | | UT | Vermillion Cliffs Observatory, Kanab |
| G86 | Tucson-Winterhaven Observatory | | AZ | Tucson-Winterhaven |
| G87 | Calvin M. Hooper Memorial Observatory | | UT | Calvin M. Hooper Memorial Observatory, Hyde Park |
| G88 | LAMP Observatory | | AZ | LAMP Observatory, New River |
| G89 | Kachina Observatory | | AZ | Kachina Observatory, Flagstaff |
| G90 | Three Buttes Observatory | | AZ | Three Buttes Observatory, Tucson |
| G91 | 2MASS (Two Micron All-Sky Survey) at Whipple Obs. (see #696) | | AZ | Whipple Observatory, Mt. Hopkins—2MASS |
| G92 | Jarnac Observatory | | AZ | Jarnac Observatory, Vail |
| G93 | Sonoita Research Observatory | | AZ | Sonoita Research Observatory, Sonoita |
| G94 | Sonoran Skies Observatory | | AZ | Sonoran Skies Observatory, St. David |
| G95 | Hereford Arizona Observatory | | AZ | Hereford Arizona Observatory, Hereford |
| G96 | Mount Lemmon Survey | | AZ | Mt. Lemmon Survey |
| G97 | Astronomical League Alpha Observatory | | AZ | Astronomical League Alpha Observatory, Portal |
| G98 | Calvin-Rehoboth Robotic Observatory | | NM | Calvin-Rehoboth Observatory, Rehoboth |
| G99 | NF Observatory | | NM | NF Observatory, Silver City |
| H00 | Tyrone Observatory | | NM | Tyrone |
| H01 | Magdalena Ridge Observatory, New Mexico Tech | | NM | Magdalena Ridge Observatory, Socorro |
| H02 | Sulphur Flats Observatory | | NM | Sulphur Flats Observatory, La Cueva |
| H03 | Sandia View Observatory | | NM | Sandia View Observatory, Rio Rancho |
| H04 | Santa Fe Observatory | | NM | S |
| H05 | Edmund Kline Observatory | | CO | Edmund Kline Observatory, Deer Trail |
| H06 | Remote Astronomical Society Observatory of New Mexico, a.k.a. RAS Observatory of New Mexico; New Mexico Skies Observatory; iTelescope Observatory | | NM | iTelescope Observatory, Mayhill |
| H07 | 7300 Observatory | | NM | 7300 Observatory, Cloudcroft |
| H08 | BlackBird Observatory; observer: Ken Levin | | NM | BlackBird Observatory, Cloudcroft |
| H09 | Antelope Hills Observatory; observer: Robert A. Koff (also see #713) [2] Src Archived 2021-12-05 at the Wayback Machine | | CO | Antelope Hills Observatory, Bennett |
| H10 | Tzec Maun Observatory (Tzec Maun Foundation Observatory at Mayhill; also see Cloudcroft location: #V29) | | NM | Tzec Maun Observatory, Mayhill |
| H11 | LightBuckets Observatory, Rodeo (LightBuckets re-located to #B10 in 2011) Src | | NM | LightBuckets Observatory, Rodeo |
| H12 | TechDome, Mayhill Src | | NM | TechDome, Mayhill |
| H13 | Lenomiya Observatory Src | | AZ | Lenomiya Observatory, Casa Grande |
| H14 | Morning Star Observatory, Tucson Src | | AZ | Morning Star Observatory, Tucson |
| H15 | ISON-NM, Mayhill Src Archived 2021-03-03 at the Wayback Machine | | NM | ISON-NM Observatory, Mayhill |
| H16 | HUT Observatory, Eagle | | CO | HUT Observatory, Eagle |
| H17 | Angel Peaks Observatory | | CO | Angel Peaks Observatory |
| H18 | Vail | | AZ | Vail View Observatory, Vail |
| H19 | Lone Star Observatory Src | | OK | Lone Star Observatory, Caney |
| H20 | Eastern Illinois University Obs. | | IL | Eastern Illinois University Obs., Charleston |
| H21 | Astronomical Research Observatory or Astronomical Research Institute | | IL | Astronomical Research Observatory, Westfield |
| H22 | Terre Haute | | IN | Terre Haute |
| H23 | Pear Tree Observatory | | FL | Pear Tree Observatory, Valparaiso |
| H24 | J. C. Veen Observatory | | MI | J. C. Veen Observatory, Lowell |
| H25 | Harvest Moon Observatory | | MN | Harvest Moon Observatory, Northfield |
| H26 | Doc Greiner Research Observatory, also see #G48 | | WI | Doc Greiner Research Observatory, Janesvillle |
| H27 | Moonglow Observatory | | MO | Moonglow Observatory, Warrensburg |
| H28 | Preston Hills Observatory (different from Preston Gott Observatory, Texas Tech University, north of Lubbock; observer: Maurice Clark Src Src) | | TX | Preston Hills Observatory, Celina |
| H29 | Ivywood Observatory | | OK | Ivywood Observatory, Edmond |
| H30 | University of Oklahoma Observatory | | OK | University of Oklahoma Observatory, Norman |
| H31 | Star Ridge Observatory | | TX | Star Ridge Observatory, Weimar |
| H32 | Texas A&M Physics Observatory, College Station | | TX | Texas A&M Physics Observatory, College Station |
| H33 | Bixhoma Observatory, Bixby | | OK | Bixhoma Observatory, Bixby |
| H34 | Chapel Hill Observatory | | TX | Chapel Hill |
| H35 | Leavenworth Observatory | | KS | Leavenworth |
| H36 | Sandlot Observatory | | KS | Sandlot Observatory, Scranton |
| H37 | Grems Timmons Observatories | | IA | Grems Timmons Observatories, Graettinger |
| H38 | Timberline Observatory | | IA | Timberline Observatory, Urbandale |
| H39 | S.O.S. Observatory (Shed of Science Observatory; SOS); observer: Richard Durkee Src | | MN | S.O.S. Observatory, Minneapolis |
| H40 | Nubbin Ridge Observatory | | AR | Nubbin Ridge Observatory |
| H41 | Petit Jean Mountain | | AR | Petit Jean Mountain |
| H42 | Wartburg College Observatory | | IA | Wartburg College Observatory, Waverly |
| H43 | Conway Observatory | | AR | Conway |
| H44 | Cascade Mountain Observatory | | AR | Cascade Mountain |
| H45 | Arkansas Sky Observatory | | AR | Arkansas Sky Obs., Petit Jean Mountain South |
| H46 | Ricky Observatory | | MO | Ricky Observatory, Blue Springs |
| H47 | Vicksburg Observatory | | MS | Vicksburg |
| H48 | PSU Greenbush Observatory | | KS | PSU Greenbush Observatory, Pittsburg |
| H49 | ATU Astronomical Observatory | | AR | ATU Astronomical Observatory, Russellville |
| H50 | University of Central Arkansas Observatory | | AR | University of Central Arkansas Obs., Conway |
| H51 | Greiner Research Observatory | | WI | Greiner Research Observatory, Verona |
| H52 | Hawkeye Observatory Src | | IL | Hawkeye Observatory, Durand |
| H53 | Thompsonville Observatory | | IL | Thompsonville |
| H54 | Cedar Drive Observatory | | WI | Cedar Drive Observatory, Pulaski |
| H55 | Astronomical Research Observatory, formerly known as Antares Observatory (also see observatory #X39 in Argentina) | | IL | Astronomical Research Observatory, Charleston |
| H56 | Northbrook Meadow Observatory | | IL | Northbrook Meadow Observatory |
| H57 | Ohio State University Observatory | | OH | Ohio State University Observatory, Lima |
| H58 | NASA/MSFC ALaMO | | AL | NASA/MSFC ALaMO, Redstone Arsenal |
| H59 | Prairie Grass Observatory | | IN | Prairie Grass Observatory, Camp Cullom |
| H60 | Heartland Observatory | | IN | Heartland Observatory, Carmel |
| H61 | Newcastle Observatory | | - | Newcastle |
| H62 | Calvin College Observatory | | MI | Calvin College Observatory |
| H63 | DeKalb Observatory, observer: Don Starkey [2] | | IN | DeKalb Observatory, Auburn |
| H64 | Thomas More College Observatory | | KY | Thomas More College Observatory, Crestview Hills |
| H65 | Waltonfields Observatory | | KY | Waltonfields Observatory, Walton |
| H66 | Yellow Springs Observatory | | OH | Yellow Springs |
| H67 | Stonegate Observatory | | MI | Stonegate Observatory, Ann Arbor |
| H68 | Red Barn Observatory | | GA | Red Barn Observatory, Ty Ty |
| H69 | Ohio Wesleyan University | | OH | Perkins Observatory, Delaware |
| H70 | Asheville Observatory | | NC | Asheville |
| H71 | Chula Observatory | | GA | Chula |
| H72 | Evelyn L. Egan Observatory | | FL | Evelyn L. Egan Observatory, Fort Myers |
| H73 | Lakeland Astronomical Observatory | | FL | Lakeland Astronomical Observatory, Kirtland |
| H74 | Bar J Observatory | | FL | Bar J Observatory, New Smyrna Beach |
| H75 | Indian Hill North Observatory | | OH | Indian Hill North Observatory, Huntsburg |
| H76 | Oakridge Observatory | | FL | Oakridge Observatory, Miami |
| H77 | Buehler Observatory | | FL | Buehler Observatory |
| H78 | University of Nariño Observatory |  | - | University of Narino Observatory, Pasto |
| H79 | York University Observatory | | ON | York University Observatory, Toronto |
| H80 | Halstead Observatory Src | | NJ | Halstead Observatory, Princeton |
| H81 | Hartung-Boothroyd Observatory | | NY | Hartung-Boothroyd Observatory, Ithaca |
| H82 | CBA-NOVAC Observatory | | VA | CBA-NOVAC Observatory, Front Royal |
| H83 | Timberlake Observatory | | VA | Timberlake Observatory, Oakton |
| H84 | Northview Observatory | | NY | Northview Observatory, Mendon |
| H85 | Silver Spring Observatory Src | | MD | Silver Spring |
| H86 | CBA-East Observatory | | MD | CBA-East Observatory, Laurel |
| H87 | Fenwick Observatory | | VA | Fenwick Observatory, Richmond |
| H88 | Hope Observatory | | MD | Hope Observatory, Belcamp |
| H89 | Galaxy Blues Observatory | | QC | Galaxy Blues Observatory, Gatineau |
| H90 | Ottawa Observatory | | ON | Ottawa |
| H91 | Reynolds Observatory | | NY | Reynolds Observatory, Potsdam |
| H92 | Arcturus Observatory | | NJ | Arcturus Observatory |
| H93 | Berkeley Heights Observatory | | NJ | Berkeley Heights |
| H94 | Cedar Knolls Observatory | | NJ | Cedar Knolls |
| H95 | NJIT Observatory | | NJ | NJIT Observatory, Newark |
| H96 | Observatoire des Pléïades | | QC | Observatoire des Pleiades, Mandeville |
| H97 | Talcott Mountain Science Center | | CT | Talcott Mountain Science Center, Avon |
| H98 | Dark Roseanne Observatory | | CT | Dark Rosanne Obs., Middlefield |
| H99 | Sunhill Observatory | | MA | Sunhill Observatory, Newton |
| I00 | Carbuncle Hill Observatory; observer: Donald Pray (also see #912) | | RI | Carbuncle Hill Observatory, Coventry |
| I01 | Clay Center Observatory | | MA | Clay Center Observatory, Brookline |
| I02 | Two Micron All-Sky Survey (2MASS), at #807 | | Co | Cerro Tololo Observatory, La Serena—2MASS |
| I03 | Astrovirtel (Accessing Astronomical Archives as Virtual Telescopes) | | - | European Southern Obs., La Silla—ASTROVIRTEL |
| I04 | Mamalluca Observatory, Vicuña | | Co | Mamalluca Observatory |
| I05 | Las Campanas Observatory-TIE | | - | Las Campanas Observatory-TIE |
| I06 | Werner Schmidt Observatory, Dennis-Yarmouth Regional HS, South Yarmouth | | MA | Werner Schmidt Obs., Dennis-Yarmouth Regional HS |
| I07 | Conlin Hill Observatory | | MA | Conlin Hill Observatory, Oxford |
| I08 | Alianza S4 Observatory, El Leoncito | | J | Alianza S4, Cerro Burek |
| I09 | Cerro Armazones Observatory | | - | Cerro Armazones |
| I10 | CAO – Campo Catino Austral Observatory Survey (CAOS) Src Archived 2018-02-03 at the Wayback Machine | | Af | CAO, San Pedro de Atacama (until 2012) |
| I11 | Gemini South (Gemini South Observatory) | | - | Gemini South Observatory, Cerro Pachón |
| I12 | Phillips Academy Observatory | | MA | Phillips Academy Observatory, Andover |
| I13 | Burleith Observatory | | D.C. | Burleith Observatory, Washington D.C. |
| I14 | Tigh Speuran Observatory | | MA | Tigh Speuran Observatory, Framingham |
| I15 | Wishing Star Observatory | | MA | Wishing Star Observatory, Barrington |
| I16 | IAA-AI Atacama Observatory | | Af | IAA-AI Atacama, San Pedro de Atacama |
| I17 | Thomas G. Cupillari Observatory Src | | PA | Thomas G. Cupillari Observatory, Fleetville |
| I18 | Fan Mountain Observatory | | VA | Fan Mountain Observatory, Covesville |
| I19 | El Gato Gris Observatory (Observatorio El Gato Gris) Src | | Cór | Observatorio El Gato Gris, Tanti |
| I20 | Salvador Observatory (Observatorio Astronomico Salvador) Src | | Cór | Observatorio Astronomico Salvador, Rio Cuarto |
| I21 | El Condor Observatory | | Cór | El Condor Observatory, Córdoba |
| I22 | Abbey Ridge Observatory, observer: David Lane | | NS | Abbey Ridge Observatory, Stillwater Lake |
| I23 | Frosty Cold Observatory | | ME | Frosty Cold Observatory, Mash Harbor |
| I24 | Lake of the Woods Observatory Src | | VA | Lake of the Woods Observatory, Locust Grove |
| I25 | ECCCO Observatory | | Cór | ECCCO Observatory, Bosque Alegre |
| I26 | Kappa Crucis Observatory (Observatorio Kappa Crucis) Ssrc | | Cór | Observatorio Kappa Crucis, Cordoba |
| I27 | Barred Owl Observatory | | - | Barred Owl Observatory, Carp |
| I28 | Starhoo Observatory | | MA | Starhoo Observatory, Lakeville |
| I29 | Middlesex School Observatory | | MA | Middlesex School Observatory, Concord |
| I30 | Geminis Austral Observatory (Observatorio Geminis Austral) | | S | Observatorio Geminis Austral |
| I31 | Colegio Cristo Rey Observatory (Observatorio Astronomico del Colegio Cristo Rey), Rosario | | S | Observatorio Astronomico del Colegio Cristo Rey |
| I32 | Beta Orionis Observatory (Observatorio Beta Orionis) | | S | Observatorio Beta Orionis, Rosario |
| I33 | Southern Astrophysical Research Telescope (SOAR) | | - | SOAR, Cerro Pachon |
| I34 | Morgantown Observatory | | PA | Morgantown |
| I35 | Sidoli Observatory (Observatorio Sidoli) | | BA | Sidoli |
| I36 | Los Campitos Observatory (Observatorio Los Campitos), Cañuelas | | BA | Observatorio Los Campitos, Cañuela |
| I37 | Astrodomi Observatory Src | | BA | Astrodomi Observatory, Santa Rita |
| I38 | Los Algarrobos Observatory (Observatorio Los Algarrobos) | | - | Observatorio Los Algarrobos, Salto |
| I39 | Cruz del Sur Observatory (Observatorio Cruz del Sur) Src | | BA | Observatorio Cruz del Sur, San Justo |
| I40 | TRAPPIST – Transiting Planets and Planetesimals Small Telescope | | - | La Silla—TRAPPIST |
| I41 | Zwicky Transient Facility (ZTF) and its predecessor Palomar Transient Factory (PTF) at Palomar Observatory | | CA | Palomar Mountain—PTF Src Palomar Mountain—ZTF |
| I42 | Westport Observatory | | FL | Westport Observatory |
| I43 | Tarleton State University Observatory | | TX | Tarleton State University Obs., Stephenville |
| I44 | Northwest Florida State College | | FL | Northwest Florida State College, Niceville |
| I45 | Observatorio W Crucis Src | | BA | W Crucis Astronomical Observatory, San Justo |
| I46 | The Cottage Observatory | | PA | The Cottage Observatory, Altoona |
| I47 | Pierre Auger Observatory Src | | M | Pierre Auger Observatory, Malargüe |
| I48 | El Catalejo Observatory (Observatorio El Catalejo), La Pampa | | L | Observatorio El Catalejo, Santa Rosa |
| I49 | Sunflower Observatory | | NM | Sunflower Observatory, Santa Fe |
| I50 | P2 Observatory | | NM | P2 Observatory, Mayhill |
| I51 | Clinton Observatory | | MD | Clinton |
| I52 | Mount Lemmon Observatory (CHECK: Mount Lemmon Survey) of the Steward Observatory | | AZ | Steward Observatory, Mt. Lemmon Station |
| I53 | Armilla Observatory | | - | Armilla |
| I54 | Las Vaguadas Observatory (Observatorio Las Vaguadas) | | - | Observatorio Las Vaguadas, Badajoz |
| I55 | Valencia Observatory | | - | V |
| I56 | John Beckman Observatory (Observatorio Astronómico John Beckman) | | - | Observatorio Astronomico John Beckman, Almería |
| I57 | Elche Observatory | | - | Elche |
| I58 | Bétera Observatory | | - | Betera |
| I59 | Antares Observatory (Observatorio Antares), Camargo, Cantabria | | - | Observatorio Fuente de los matos, Muriedas |
| I60 | Guernanderf Observatory | | - | Guernanderf |
| I61 | Ourense Observatory | | - | Ourense |
| I62 | Helios Ontigola Observatory (Observatorio Helios Ontigola) | | - | Observatorio Helios Ontigola |
| I63 | Cygnus Observatory | | - | Cygnus Observatory, New Airesford |
| I64 | Maidenhead Observatory | | - | Maidenhead |
| I65 | Yunquera Observatory | | - | Yunquera |
| I66 | Taurus Australis Observatory | | DF | Taurus Australis Observatory, Brasília |
| I67 | Hartley Wintney Observatory | | - | Hartley Wintney |
| I68 | Pousada dos Anoẽs Observatory | | - | Pousada dos Anoes Observatory |
| I69 | AGM Observatory |  | - | AGM Observatory, Marrakech |
| I70 | Gedney House Observatory | | ENG | Gedney House Observatory, Kirton |
| I71 | Los Milanos Observatory (Observatorio Los Milanos) | | - | Observatorio Los Milanos, Caceres |
| I72 | Carpe-Noctem Observatory (Observatorio Carpe-Noctem) | | MD | Observatorio Carpe-Noctem, Madrid |
| I73 | Salvia Observatory | | - | Salvia Observatory, Saulges |
| I74 | Baxter Garden Observatory Src | | ENG | Baxter Garden Observatory, Salisbury |
| I75 | Castellon Observatory (Observatorio Castellon) | | - | Observatorio Castellon |
| I76 | Tesla Observatory | | - | Observatorio Tesla, Valdemorillo |
| I77 | CEAMIG-REA Observatory | | MG | CEAMIG-REA Observatory, Belo Horizonte |
| I78 | Principia Observatory (Observatorio Principia) | | - | Observatorio Principia, Málaga |
| I79 | AstroCamp Observatory | | - | AstroCamp, Nerpio |
| I80 | Rose Cottage Observatory | | ENG | Rose Cottage Observatory, Keighley |
| I81 | Tarbatness Observatory | | SCT | Tarbatness Observatory, Portmahomack |
| I82 | Güímar Observatory | | CN | Guimar |
| I83 | Cherryvalley Observatory | | - | Cherryvalley Observatory, Rathmolyon |
| I84 | Cerro del Viento Observatory | | - | Cerro del Viento, Badajoz |
| I85 | Las Negras Observatory | | - | Las Negras |
| I86 | UCM Observatory (Observatorio UCM) | | MD | Observatorio UCM, Madrid |
| I87 | Astroshot Observatory | | - | Astroshot Observatory, Monasterevin |
| I88 | Fuensanta de Martos Observatory Src | | - | Fuensanta de Martos |
| I89 | RAS Observatory | | - | iTelescope Observatory, Nerpio |
| I90 | Blackrock Castle Observatory | | - | Blackrock Castle Observatory |
| I91 | Retamar Observatory | | - | Retamar |
| I92 | Astreo Observatory | | - | Astreo Observatory, Mairena del Aljarafe |
| I93 | Saint Pardon de Conques Observatory Src | | - | St Pardon de Conques |
| I94 | Rho Ophiocus Observatory (Observatorio Rho Ophiocus) | | MD | Observatorio Rho Ophiocus, Las Rozas de Madrid |
| I95 | Hita Observatory (Observatorio de la Hita) | | - | Observatorio de la Hita |
| I96 | Hyperion Observatory Src | | - | Hyperion Observatory, Urbanizacion Caraquiz |
| I97 | Penn Heights Observatory | | - | Penn Heights Observatory, Rickmansworth |
| I98 | El Berrueco Observatory | | - | El Berrueco |
| I99 | Blanquita Observatory (Observatorio Blanquita) Src | | MD | Observatorio Blanquita, Vaciamadrid |
| J00 | Segorbe Observatory | | Castellon | Segorbe |
| J01 | Cielo Profundo Observatory (Observatorio Cielo Profundo), Oviedo | | - | Observatorio Cielo Profundo, Leon |
| J02 | Busot Observatory | | - | Busot |
| J03 | Gothers Observatory | | - | Gothers Observatory, St. Dennis |
| J04 | OGS Telescope | | CN | ESA Optical Ground Station, Tenerife |
| J05 | Bootes Observatory | | - | Bootes Observatory, Boecillo |
| J06 | Trent Astronomical Observatory | | - | Trent Astronomical Observatory, Clifton |
| J07 | SPAG Monfragüe Observatory (Observatorio SPAG Monfragüe) | | - | Observatorio SPAG Monfrague, Palazuelo-Empalme |
| J08 | Zonalunar Observatory (Observatorio Zonalunar) Src | | V | Observatorio Zonalunar, Puzol |
| J09 | Balbriggan Observatory | | - | Balbriggan |
| J10 | Alicante Observatory | | - | Alicante |
| J11 | Matosinhos Observatory | | - | Matosinhos |
| J12 | Caraquiz Observatory | | - | Caraquiz |
| J13 | Liverpool Telescope at La Palma | | CN | La Palma-Liverpool Telescope |
| J14 | La Corte Observatory | | - | La Corte |
| J15 | Muxagata Observatory | | - | Muxagata |
| J16 | An Carraig Observatory Src | | NIR | An Carraig Observatory, Loughinisland |
| J17 | Ragdon Observatory | | - | Ragdon |
| J18 | Dingle Observatory | | WLS | Dingle Observatory, Montgomery |
| J19 | El Maestrat Observatory | | - | El Maestrat |
| J20 | Aravaca Observatory | | - | Aravaca |
| J21 | El Boalo Observatory | | - | El Boalo |
| J22 | Tacande Observatory Src | | CN | Tacande Observatory, La Palma |
| J23 | La Couyere Observatory (Centre Astronomique de La Couyere) | | - | Centre Astronomique de La Couyere |
| J24 | Altamira Observatory (Observatorio Altamira) Src | | CN | Observatorio Altamira |
| J25 | Penamayor Observatory | | - | Penamayor Observatory, Nava |
| J26 | The Spaceguard Centre | | - | The Spaceguard Centre, Knighton |
| J27 | El Guijo Observatory Src | | - | El Guijo Observatory |
| J28 | Jaén Observatory (Observatorio Jaén) Src | | - | Jaen |
| J29 | Nira Observatory (Observatorio Nira) | | - | Observatorio Nira, Tias |
| J30 | Ventilla Observatory (Observatorio Ventilla) | | MD | Observatorio Ventilla, Madrid |
| J31 | La Axarquia Observatory | | - | La Axarquia |
| J32 | Aljaraque Observatory | | - | Aljaraque |
| J33 | Bayfordbury Observatory | | ENG | University of Hertfordshire Obs., Bayfordbury |
| J34 | La Fecha Observatory | | - | La Fecha |
| J35 | Tucci Observatory | | - | Tucci Observatory, Martos |
| J36 | DiezALaOnce Observatory (Observatorio DiezALaOnce) Src | | - | Observatorio DiezALaOnce, Illana |
| J37 | Huelva Observatory | | - | Huelva |
| J38 | La Vara Observatory (Observatorio La Vara) Src | | - | Observatorio La Vara, Valdés |
| J39 | Ingenio Observatory | | - | Ingenio |
| J40 | Málaga Observatory Src | | - | Malaga |
| J41 | Raheny Observatory | | - | Raheny |
| J42 | Puzol Observatory (Punto de Observación de Puçol; POP), observer: Amadeo Aznar Src | | V | Puzol |
| J43 | Oukaïmeden Observatory, Oukaïmeden, location of project MOSS (Src) | | - | Oukaimeden Observatory, Marrakech |
| J44 | Iturrieta Observatory (Observatorio Iturrieta) | | - | Observatorio Iturrieta, Alava |
| J45 | MT Cabreja Observatory (Observatorio Montana Cabreja), Gran Canaria Src | | CN | Observatorio Montana Cabreja, Vega de San Mateo |
| J46 | MT Blanca Observatory (Observatorio Montana Blanca) | | - | Observatorio Montana Blanca, Tias |
| J47 | Nazaret Observatory (Observatorio Nazaret) | | - | Observatorio Nazaret |
| J48 | Observatory Mackay | | - | Observatory Mackay, La Laguna |
| J49 | Santa Pola Observatory | | - | Santa Pola |
| J50 | NEON Observatory at La Palma | | CN | La Palma-NEON |
| J51 | Atlante Observatory (Observatorio Atlante) Src | | CN | Observatorio Atlante, Tenerife |
| J52 | Pinsoro Observatory (Observatorio Pinsoro) | | - | Observatorio Pinsoro |
| J53 | Posadas Observatory | | - | Posadas |
| J54 | Bradford Robotic Telescope, Tenerife | | CN | Bradford Robotic Telescope |
| J55 | Los Altos de Arguineguin Observatory | | - | Los Altos de Arguineguin Observatory |
| J56 | La Avejerilla Observatory (Observatorio La Avejerilla) | | - | Observatorio La Avejerilla |
| J57 | Alto Turia Observatory (Centro Astronómico Alto Turia) | | V | Centro Astronomico Alto Turia, Valencia |
| J58 | Brynllefrith Observatory | | WLS | Brynllefrith Observatory, Llantwit Fardre |
| J59 | Linceo Observatory (Observatorio Linceo) | | CB | Observatorio Linceo, Santander |
| J60 | Tocororo Observatory | | CL | Tocororo Observatory, Arquillinos |
| J61 | Brownstown Observatory | | - | Brownstown Observatory, Kilcloon |
| J62 | Kingsland Observatory | | - | Kingsland Observatory, Boyle |
| J63 | San Gabriel Observatory | | - | San Gabriel |
| J64 | La Mata Observatory | | - | La Mata |
| J65 | Celbridge Observatory | | - | Celbridge |
| J66 | Kinver Observatory | | - | Kinver |
| J67 | La Pobla de Vallbona Observatory (Observatorio La Pobla de Vallbona) | | V | Observatorio La Po bla de Vallbona |
| J68 | Tweenhills Observatory, Gloucestershire | | ENG | Tweenhills Observatory, Hartpury |
| J69 | North Observatory | | ENG | North Observatory, Clanfield |
| J70 | Vega del Thader Observatory (Observatorio Astronómico Vega del Thader) Src | | - | Obs. Astronomico Vega del Thader, El Palmar |
| J71 | Willow Bank Observatory, Lancashire | | ENG | Willow Bank Observatory |
| J72 | Valle del Sol Observatory | | - | Valle del Sol |
| J73 | Quainton Observatory, Buckinghamshire Src | | ENG | Quainton |
| J74 | Bilbao Observatory | | Biscay | Bilbao |
| J75 | La Sagra Observatory (Observatorio Astronómico de La Sagra; OLS) Src; a remote station of OAM, see #620 | | - | OAM Observatory, La Sagra |
| J76 | La Murta Observatory | | - | La Murta |
| J77 | Golden Hill Observatory, Dorset | | ENG | Golden Hill Observatory, Stourton Caundle |
| J78 | Murcia Observatory | | - | Murcia |
| J79 | Calarreona Observatory (Observatorio Calarreona) | | Murcia | Observatorio Calarreona, Águilas |
| J80 | Sainte-Hélène Observatory, Sainte-Hélène, Gironde | | - | Sainte Helene |
| J81 | Guirguillano Observatory | | - | Guirguillano |
| J82 | Leyland Observatory | | - | Leyland |
| J83 | Olive Farm Observatory | | - | Olive Farm Observatory, Hoghton |
| J84 | South Observatory | | - | South Observatory, Clanfield |
| J85 | Makerstoun Observatory | | - | Makerstoun |
| J86 | Sierra Nevada Observatory (Observatorio de Sierra Nevada; OSN), Loma de Dilar | | Granada | Sierra Nevada Observatory |
| J87 | La Cañada Observatory (Observatorio de La Cañada), Ávila | | CL | La Canada |
| J88 | Strawberry Field Observatory | | ENG | Strawberry Field Obs., Southampton |
| J89 | Tres Cantos Observatory | | - | Tres Cantos Observatory |
| J90 | West Challow Observatory | | - | West Challow |
| J91 | Alt emporda Observatory | | - | Alt emporda Observatory, Figueres |
| J92 | Beaconsfield Observatory | | - | Beaconsfield |
| J93 | Mount Tuffley Observatory | | ENG | Mount Tuffley Observatory, Gloucester |
| J94 | Abbeydale Observatory, Gloucester | | ENG | Abbeydale |
| J95 | Great Shefford Observatory, Berkshire | | ENG | Great Shefford |
| J96 | Cantabria Observatory (Observatorio de Cantabria) | | CB | Observatorio de Cantabria |
| J97 | Alginet Observatory | | V | Alginet |
| J98 | Manises Observatory (Observatorio Manises) | | V | Observatorio Manises |
| J99 | Burjassot Observatory | | V | Burjassot |
| K00 | Hanau Observatory | | - | Hanau |
| K01 | Astrognosis Observatory | | - | Astrognosis Observatory, Bradwell |
| K02 | Eastwood Observatory | | - | Eastwood Observatory, Leigh on Sea |
| K03 | Montsec Observatory (Observatori Astronòmic del Montsec; OAdM) Src | | CT | Observatori AAS Montsec |
| K04 | Lo Fossil Observatory | | CT | Lo Fossil Observatory, Àger |
| K05 | Eden Observatory | | ENG | Eden Observatory, Banham |
| K06 | Montagut Observatory (Observatorio Montagut) | | CT | Observatorio Montagut, Can Sola |
| K07 | Gravelle Observatory (Observatoire de Gravelle) | | Paris | Observatoire de Gravelle, St. Maurice |
| K08 | Lledoner Observatory (Observatorio Lledoner) | | CT | Observatorio Lledoner, Vallirana |
| K09 | Llica d'Amunt Observatory (Observatori Astronomic de Lliçà d'Amunt) | | - | Llica d'Amunt |
| K10 | Micro Palomar | | - | Micro Palomar, Reilhanette |
| K11 | Pommier Observatory (Observatoire de Pommier) | | - | Observatoire de Pommier |
| K12 | Marratxi Observatory (Observatorio Astronómico de Marratxi) | | - | Observatorio Astronomico de Marratxi |
| K13 | Albireo Observatory | | - | Albireo Observatory, Inca |
| K14 | Sencelles Observatory (Observatorio de Sencelles) | | - | Observatorio de Sencelles |
| K15 | Murviel-lès-Montpellier Observatory | | - | Murviel-les-Montpellier |
| K16 | Reilhanette Observatory | | - | Reilhanette |
| K17 | Valentines Observatory (Observatoire des Valentines) | | SWF | Observatoire des Valentines, Bex |
| K18 | Hésingue Observatory | | - | Hesingue |
| K19 | PASTIS Observatory | | - | PASTIS Observatory, Banon |
| K20 | Danastro Observatory | | - | Danastro Observatory, Romerée |
| K21 | Saint-Saturnin-lès-Avignon | | - | Saint-Saturnin-les-Avignon |
| K22 | Les Barres Observatory | | - | Les Barres Observatory, Lamanon |
| K23 | Gorgonzola Observatory | | - | Gorgonzola |
| K24 | Schmelz Observatory | | - | Schmelz |
| K25 | Haute Provence Sud, Saint-Michel-l'Observatoire, see #511 | | PACA | Haute Provence Sud, Saint-Michel-l'Observatoire |
| K26 | Contern | | - | Contern |
| K27 | St-Martin Observatory, Amathay Vésigneux | | - | St-Martin Observatory, Amathay Vesigneux |
| K28 | Sternwarte Eckdorf | | - | Sternwarte Eckdorf |
| K29 | Stellarium Gornergrat | | SWG | Stellarium Gornergrat |
| K30 | Lüscherz Observatory | | SWG | Luscherz |
| K31 | Osservatorio Astronomico di Bellino | | - | Osservatorio Astronomico di Bellino |
| K32 | Maritime Alps Observatory, Cuneo | | - | Maritime Alps Observatory, Cuneo |
| K33 | San Defendente | | - | San Defendente |
| K34 | Turin | | - | Turin |
| K35 | Huenfelden Observatory | | - | Huenfelden |
| K36 | Ebersheim Observatory | | - | Ebersheim |
| K37 | Cereseto Observatory | | - | Cereseto |
| K38 | M57 Observatory | | - | M57 Observatory, Saltrio |
| K39 | Serra Observatory | | - | Serra Observatory |
| K40 | Altdorf Observatory | | - | Altdorf |
| K41 | Vegaquattro Astronomical Observatory | | - | Vegaquattro Astronomical Obs., Novi Ligure |
| K42 | Knielingen Observatory | | - | Knielingen |
| K43 | OVM Observatory | | Lo | OVM Observatory, Chiesa in Valmalencom |
| K44 | Marienburg Observatory (Marienburg Sternwarte) | | - | Marienburg Sternwarte, Hildesheim |
| K45 | Punta Falcone Observatory (Osservatorio Astronomico di Punta Falcone) | | - | Oss. Astronomico di Punta Falcone, Piombino |
| K46 | Bamberg Observatory | | - | Bamberg |
| K47 | BSCR Observatory | | - | BSCR Observatory, Santa Maria a Monte |
| K48 | Keyhole Observatory | | - | Keyhole Observatory, San Giorgio di Mantova |
| K49 | Carpione Observatory | | - | Carpione Observatory, Spedaletto |
| K50 | Feuerstein Observatory (Sternwarte Feuerstein) | | - | Sternwarte Feuerstein, Ebermannstadt |
| K51 | Celado Observatory (Osservatorio del Celado) | | - | Osservatorio del Celado, Castello Tesino |
| K52 | Gwen Observatory | | - | Gwen Observatory, San Francesco al Campo |
| K53 | Marina di Cerveteri | | - | Marina di Cerveteri |
| K54 | Astronomical Observatory University of Siena | | - | Astronomical Observatory University of Siena |
| K55 | Wallhausen Observatory | | - | Wallhausen |
| K56 | Osservatorio di Foligno | | - | Osservatorio di Foligno |
| K57 | Fiore Observatory | | - | Fiore Observatory |
| K58 | Gevelsberg Observatory | | - | Gevelsberg |
| K59 | Elsterland Observatory, Jeßnigk | | - | Elsterland Observatory, Jessnigk |
| K60 | Lindby Observatory | | - | Lindby |
| K61 | Rokycany Observatory | | - | Rokycany Observatory |
| K62 | Teplice Observatory | | - | Teplice Observatory |
| K64 | Waizenreuth Observatory | | - | Waizenreuth |
| K65 | Cesena Observatory | | - | Cesena |
| K66 | Osservatorio Astronomico di Anzio | | - | Osservatorio Astronomico di Anzio |
| K67 | Bayerwald Sternwarte, Spiegelau, see #C69 | | - | Bayerwald Sternwarte, Spiegelau |
| K68 | Osservatorio Elianto | | - | Osservatorio Elianto, Pontecagnano |
| K69 | Riethnordhausen Observatory | | - | Riethnordhausen |
| K70 | Rosarno Observatory | | - | Rosarno |
| K71 | Neutraubling Observatory | | - | Neutraubling |
| K72 | Celico Observatory | | - | Celico |
| K73 | Gravina in Puglia | | - | Gravina in Puglia |
| K74 | Muensterschwarzach Observatory | | - | Muensterschwarzach Observatory, Schwarzach |
| K75 | Astro Dolomites Observatory | | - | Astro Dolomites, Santa Cristina Valgardena |
| K76 | BSA Osservatorio | | - | BSA Osservatorio, Savigliano |
| K77 | EHB01 Observatory | | - | EHB01 Observatory, Engelhardsberg |
| K78 | iota Scorpii Observatory, obs.: Giulio Scarfì | | Li | iota Scorpii Observatory, La Spezia |
| K79 | Erfurt Observatory | | TH | Erfurt |
| K80 | Platanus Observatory | | WV | Platanus Observatory, Lusówko |
| K81 | P.M.P.H.R. Deep Sky Observatory | | La | P.M.P.H.R. Deep Sky Observatory, Atina |
| K82 | Alphard Observatory | | - | Alphard Observatory, Ostuni |
| K83 | Beppe Forti Astronomical Observatory | | Tu | Beppe Forti Astronomical Observatory, Montelupo |
| K84 | Felliscopio Observatory Src Archived 2021-11-11 at the Wayback Machine | | ER | Felliscopio Observatory, Fellicarolo |
| K85 | Kelmis Observatory | | VAL | Kelmis |
| K86 | Brescia Observatory | | Lo | Brescia |
| K87 | Dettelbach Vineyard Observatory | | FB | Dettelbach Vineyard Observatory |
| K88 | GINOP-KHK, (see #461, #561 and #053), GINOP program: Src | | - | GINOP-KHK, Piszkéstető |
| K89 | Digital Stargate Observatory | | Tu | Digital Stargate Observatory, Manciano |
| K90 | Sopot Astronomical Observatory | | - | Sopot Astronomical Observatory |
| K91 | Sutherland-LCO A | | - | Sutherland-LCO A |
| K92 | Sutherland-LCO B | | - | Sutherland-LCO B |
| K93 | Sutherland-LCO C | | - | Sutherland-LCO C |
| K94 | Sutherland Observatory | | - | Sutherland |
| K95 | MASTER-SAAO Telescope | | - | MASTER-SAAO Observatory, Sutherland |
| K96 | Savelli Observatory, Savelli | | Cal | Savelli Observatory |
| K97 | Freconrupt Observatory | | BR | Freconrupt |
| K98 | 6ROADS Observatory 1 | | WV | 6ROADS Observatory 1, Wojnowko |
| K99 | Derenivka Observatory | | - | Derenivka Observatory |
| L00 | East Rome Observatory | | - | East Rome Observatory, Rome |
| L01 | Tičan Observatory (new Višnjan Observatory), also see #120 | | – | Višnjan Observatory, Tičan |
| L02 | NOAK Observatory | | - | NOAK Observatory, Stavraki |
| L03 | SGT Observatory | | UA | SGT Observatory, Gaflenz |
| L04 | ROASTERR-1 Observatory | | - | ROASTERR-1 Observatory, Cluj-Napoca |
| L05 | Dridri Observatory | | Lo | Dridri Observatory, Franciacorta |
| L06 | Sormano 2 Observatory, also see #587 | | Lo | Sormano 2 Observatory, Bellagio Via Lattea |
| L07 | Salvatore di Giacomo Observatory (Osservatorio Salvatore di Giacomo) | | Cam | Osservatorio Salvatore di Giacomo, Agerola |
| L08 | Metsähovi Optical Telescope | | - | Metsahovi Optical Telescope, Metsahovi |
| L09 | Sutherland-LCO Aqawan | | NC | Sutherland-LCO Aqawan A #1 |
| L10 | Kryoneri Observatory, Kryoneri | | - | Kryoneri Observatory |
| L11 | Sandvreten Observatory | | Up | Sandvreten Observatory |
| L12 | Koksijde Observatory | | VLG | Koksijde |
| L13 | Stardust Observatory Src | | - | Stardust Observatory, Brasov |
| L14 | Vaulx-en-Velin Observatory | | Lyon | Planetarium de Vaulx-en-Velin Observatory |
| L15 | St. George Observatory (not to be confused with: St. George Observatory, Louisiana, USA Src Archived 2017-05-24 at the Wayback Machine ) | | - | St. George Observatory, Ploiești |
| L16 | Stardreams Observatory | | - | Stardreams Observatory, Valenii de Munte |
| L17 | Albanyà Observatory, Albanyà | | CT | Observatori Astronomic Albanya |
| L18 | QOS Observatory | | - | QOS Observatory, Zalistsi |
| L19 | Felsina Observatory (Osservatorio Felsina) AAB, Montepastore | | - | Osservatorio Felsina AAB, Montepastore |
| L20 | Sarajevo Observatory |  | - | AG\_Sarajevo Observatory, Sarajevo |
| L21 | Ostrov Observatory | | - | Ostrov Observatory, Constanta |
| L22 | Bârlad Observatory | | - | Barlad Observatory |
| L23 | Schela Observatory Src | | - | Schela Observatory |
| L24 | Gauteng Observatory (Gauteng City-Region Observatory; GCRO) Src | | Gauteng | Gauteng |
| L25 | Smolęcin Observatory | | WPV | Smolecin |
| L26 | Sanderphil Urban Observatory | | La | Sanderphil Urban Observatory, Civitavecchia |
| L27 | 29PREMOTE Observatory | | AHP | 29PREMOTE Observatory, Dauban |
| L28 | ISON-Castelgrande Observatory, Castelgrande, Basilicata | | B | ISON-Castelgrande Observatory |
| L29 | Drebach-South Observatory | | - | Drebach-South Observatory, Windhoek |
| L30 | Lohbach Observatory, Benninghofen, Dortmund | | NRW | Lohbach Observatory, Benninghofen |
| L31 | RaSo Observatory | | SN | RaSo Observatory, Chemnitz |
| L32 | Korea Microlensing Telescope Network (at SAAO) | | - | Korea Microlensing Telescope Network-SAAO |
| L33 | Ananjev Observatory (Private astronomical observatory Ananjev) Src | | Odesa | Ananjev |
| L34 | Galhassin Robotic Telescope | | Si | Galhassin Robotic Telescope, Isnello |
| L35 | DreamSky Observatory | | - | DreamSky Observatory, Lisnyky |
| L36 | BlueEye600 Telescope (at Ondřejov Observatory) | | - | Ondřejov—BlueEye600 Telescope |
| L37 | Alnitak Observatory | | Cádiz | Observatorio Alnitak, El Puerto de Santa María |
| L38 | Schafsweide Observatory (Gartensternwarte Schafsweide) | | - | Gartensternwarte Schafsweide, Schelde |
| L39 | Spica Observatory (Osservatorio Spica) | | - | Osservatorio Spica, Signa |
| L40 | Rastpfuhl Observatory (Sternwarte Saarbruecken Rastpfuhl) | | S | Sternwarte Saarbruecken Rastpfuhl |
| L41 | Ponte Uso Observatory | | - | Ponte Uso |
| L42 | Observatory-Astrocamp Manciano | | - | Observatory-Astrocamp Manciano |
| L43 | Ager Observatory | | CT | Ager, Leida |
| L44 | AstroVal Observatory | | SWF | AstroVal, Le Chenit |
| L45 | ObsCT Observatory | | - | ObsCT, Catania |
| L46 | Majadahonda Observatory | | - | Observatorio Majadahonda |
| L47 | Piobbico Observatory | | - | Osservatorio Astronomico, Piobbico |
| L48 | Baia Mare Observatory | | - | Baia Mare |
| L49 | Vega Observatory (VEGA-Sternwarte) | | - | VEGA-Sternwarte, Dorfleiten |
| L50 | GenShtab Observatory | | - | GenShtab Observatory, Nauchnij |
| L51 | MARGO (Gennadiy Borisov's observatory) | | - | MARGO, Nauchnij |
| L52 | MASTER-Tavrida | | - | MASTER-Tavrida |
| L53 | Lomazzo Observatory | | Lo | Lomazzo Observatory, Como |
| L54 | Berthelot Observatory | | - | Berthelot Observatory, Hunedoara |
| L55 | Sura Gardens Observatory | | - | Sura Gardens, Dnipro |
| L56 | Limburg Observatory (Sternwarte Limburg) | | Hesse | Sternwarte Limburg, Limburg |
| L57 | Bacău Observatory, Bacău | | - | Bacau Observatory, Bacau |
| L58 | Heavenly Owl Observatory | | - | Heavenly Owl observatory |
| L59 | Compustar Observatory | | NOR | Compustar Observatory, Rouen |
| L60 | Popovich Observatory | | - | Popovich Observatory, Ivanivka |
| L61 | MONET South Observatory | | - | MONET South, Sutherland |
| L62 | Hypatia Observatory | | - | Hypatia Observatory, Rimini |
| L63 | HOB Observatory, Capraia e Limite | | - | HOB Observatory, Capraia Fiorentina |
| L64 | Martesana Observatory, Cassina de' Pecchi | | - | Martesana Observatory, Cassina de Pecchi |
| L65 | Bredenkamp Observatory | | - | Bredenkamp Observatory, Bremen |
| L66 | MeerLICHT-1 at South African Astronomical Observatory | | - | MeerLICHT-1, Sutherland |
| L67 | Cherkizovo Observatory | | - | Cherkizovo Observatory, Moscow Oblast |
| L68 | PESCOPE Observatory | | - | PESCOPE, Port Elizabeth |
| L69 | LaCaille Observatory | | - | LaCaille Observatory, Pretoria |
| L70 | Zvjezdarnica Observatory | | - | Zvjezdarnica Graberje, Zagreb |
| L71 | Vedrus Observatory | | Krasnodar | Vedrus Observatory, Azovskaya |
| L72 | Melezhy Astrophoto Observatory | | Moscow | Melezhy Astrophoto Observatory |
| L73 | Blessed Hermann Observatory (Osservatorio Beato Ermanno) (Src) | | Tu | Blessed Hermann Observatory, Impruneta |
| L74 | AstroColauri Observatory | | Cam | AstroColauri, Naples |
| L75 | Tartu Observatory of University of Tartu (see 075 for the Tartu Old Observatory) | | - | Tartu Observatory of Tartu University |
| L76 | Nomad Observatory | | - | Nomad Observatory, Kochevanchik |
| L77 | RDSS, Kovalevka | | - | RDSS, Kovalevka |
| L78 | Marco Observatory | | Cam | Marco Observatory, Salerno |
| L79 | BOSZA Observatory | | - | BOSZA Observatory, Szalanta |
| L80 | SpringBok Observatory, Tivoli Astro Farm | | - | SpringBok Observatory, Tivoli |
| L81 | Skygems Namibia Remote Observatory | | - | Skygems Namibia Remote Observatory |
| L82 | Crow Observatory | | - | Crow Observatory, Portalegre |
| L83 | UJA Observatory | | Andalusia | UJA Observatory, Jaen |
| L84 | Letnik Observatory | | - | Letnik, Rostov Oblast |
| L85 | BiAnto Observatory | | Cal | BiAnto Observatory, Lauria |
| L86 | Giordano Bruno Observatory | | Lo | Giordano Bruno Observatory, Brallo |
| L87 | Moonbase South Observatory | | - | Moonbase South Observatory, Hakos |
| L88 | Le Pleiadi Station (Stazione Astronomica Le Pleiadi) | | Bas | Stazione Astronomica Le Pleiadi, Pantane |
| L89 | PAO Observatory | | Tus | PAO, Prato |
| L90 | ABObservatory | | Cal | ABObservatory, Rosarno |
| L91 | Antares MTM Observatory, San Donato Val di Comino | | Laz | Antares MTM Observatory, S. Donato |
| L92 | San Costantino Observatory, (San Costantino di Briatico) | | Cal | Toni Scarmato's Observatory |
| L93 | Garraf Observatory | | CT | Garraf Observatory, Sant Pere de Ribes |
| L94 | MOMA Observatory (Observatorio MOMA) | | Asturias | Observatorio MOMA, Oviedo |
| L95 | Canteras Observatory | | Murcia | Canteras, Murcia |
| L96 | ISON-Byurakan Observatory | | - | ISON-Byurakan Observatory |
| L97 | Castle Fields Observatory | | ENG | Castle Fields Observatory, Calne |
| L98 | La Sagra Observatory | | Granada | La Sagra Observatory, Puebla de Don Fadrique |
| L99 | Novoselki Observatory | | - | Novoselki |
| M01 | Weizmann Astrophysical Observatory | |||
| M03 | Badalona Boreal Observatory | | CL | Badalona Boreal |
| M10 | CPF Observatory, Saint-Vallier-de-Thiey | | - | CPF Observatory, St Vallier de Thiey |
| M15 | Virgo Observatory | | Lo | Virgo Observatory, Seveso |
| M18 | Koeditz Observatory | | Ba | Koeditz |
| M20 | Polse di Cougnes Observatory | | F | Polse di Cougnes Observatory, Zuglio |
| M22 | ATLAS–SAAO | | - | ATLAS South Africa, Sutherland |
| M28 | Lesedi Telescope, South African Astronomical Observatory | | NC | Lesedi Telescope-SAAO Observatory, Sutherland |
| M33 | OWL-Net | | - | OWL-Net, Mitzpe Ramon |
| M42 | Emirates Observatory |  | - | Emirates Observatory, Al Rahba |
| M43 | Al Sadeem Observatory | | - | Al Sadeem Observatory, Abu Dhabi |
| M44 | Al-Khatim Observatory | | - | Al-Khatim Observatory, Abu Dhabi |
| M46 | Althuraya Astronomy Center | | - | Althuraya Astronomy Center, Dubai |
| M47 | Sharjah Observatory | | - | Sharjah Observatory, Sharjah |
| M68 | School 1502 Rooftop Observatory | | Moscow | Moscow, Russia |
| M90 | Chervishevo Observatory | | - | Chervishevo |
| N27 | Omsk-Yogik Observatory | | - | Omsk-Yogik Observatory |
| N30 | Zeds Astronomical Observatory |  | - | Zeds Astronomical Observatory, Lahore |
| N31 | Eden Astronomical Observatory (Src) | | - | Eden Astronomical Observatory, Lahore |
| N42 | Tien-Shan Astronomical Observatory | | - | Tien-Shan Astronomical Observatory |
| N43 | Plateau Observatory for Dome A, at Chinese Kunlun Station |  | – | Plateau Observatory for Dome A, Kunlun Station |
| N50 | Himalayan Chandra Telescope | | - | Himalayan Chandra Telescope, IAO, Hanle |
| N51 | GROWTH India Telescope | | - | GROWTH India Telescope, IAO, Hanle |
| N55 | Corona Borealis Observatory | | - | Corona Borealis Observatory, Ngari |
| N56 | Zijinshan-Beimian Survey, Ngari Prefecture | | - | Zijinshan-Beimian Survey, Ali |
| N82 | Multa Observatory | | - | Multa Observatory |
| N86 | Xingming Observatory-KATS | | - | Xingming Observatory-KATS, Nanshan |
| N87 | Nanshan Station of the Xinjiang Observatory | | - | Nanshan Station, Xinjiang Observatory |
| N88 | Xingming Observatory #3, Nanshan | | - | Xingming Observatory #3, Nanshan |
| N89 | Xingming Observatory #2 | | - | Xingming Observatory #2, Nanshan |
| O02 | Galaxy Tibet YBJ Observatory | | Tibet | Galaxy Tibet YBJ Observatory, Yangbajing |
| O37 | TRT-NEO Observatory |  | - | TRT-NEO, Chiangmai |
| O42 | Gaomeigu Gemini Observatory, LiJiang | | Yunnan | Gemini |
| O43 | Observatori Negara |  | - | Observatori Negara, Langkawi |
| O44 | Lijiang Station, Yunnan Observatories | | - | Lijiang Station, Yunnan Observatories |
| O45 | Yunnan-HK Observatory | | - | Yunnan-HK Observatory, Gaomeigu |
| O47 | Yunling Observatory | | - | Yunling Observatory, Yunnan |
| O48 | Purple Mountain Observatory, Yaoan Station, 0.8-meter | | - | Purple Mountain Observatory, Yaoan (0.8-m) |
| O49 | Yaoan Station of the Purple Mountain Observatory | | - | Purple Mountain Observatory, Yaoan Station |
| O50 | Hin Hua Observatory | | - | Hin Hua Observatory, Klang |
| O72 | OWL-Net, Songino Khairkhan |  | - | OWL-Net, Songino |
| O75 | ISON-Hureltogoot Observatory | | - | ISON-Hureltogoot Observatory |
| O85 | LiShan Observatory | | - | LiShan Observatory, Lintong |
| P18 | Birch Forest Observatory, Lǎbāgōumén | | - | Birch Forest Observatory, LaBaGouMen |
| P25 | Kinmen Educational Remote Observatory | | - | Kinmen Educational Remote Observatory, Jincheng |
| P30 | Jiangnantianchi Observatory, Anji County | | - | Jiangnantianchi Observatory, Anji |
| P31 | Starlight Observatory | | ZJ | Starlight Observatory, Tianhuangping |
| P34 | Lvye Observatory | | - | Lvye Observatory, Suzhou |
| P35 | Cuteip Remote Observatory | | - | Cuteip Remote Observatory, Changhua |
| P36 | ULTRA Observatory | | - | ULTRA Observatory, Suzhou |
| P37 | HuiWen High School Observatory Src | | TWN | HuiWen High School Observatory, Taichung City |
| P40 | Chinese Culture University Observatory | | - | Chinese Culture University, Taipei |
| P48 | ASTEP Observatory | | - | ASTEP, Concordia Station |
| P63 | GSA Observatory | | Gwangju | GSA Observatory, Gwangju |
| P64 | GSHS Observatory | | Gyeonggi | GSHS Observatory, Suwon |
| P65 | OWL-Net, Daedeoksan (Samcheok/Taebaek) | | Daejeon | OWL-Net, Daedeok |
| P66 | Deokheung Optical Astronomy Observatory | | South Jeolla | Deokheung Optical Astronomy Observatory |
| P67 | Kangwon National University Observatory | | Gangwon | Kangwon National University Observatory |
| P68 | DDSHS Biryong Observatory | | Daejeon | DDSHS Biryong Observatory |
| P71 | Miryang Arirang Astronomical Observatory | | South Gyeongsang | Miryang Arirang Astronomical Observatory |
| P72 | OWL-Net, Bohyeonsan | | North Gyeongsang | OWL-Net, Mt. Bohyun |
| P73 | BSH Byulsem Observatory | | Busan | BSH Byulsem Observatory, Busan |
| P87 | Hirao Observatory, Yamaguchi Prefecture | | - | Hirao Observatory, Yamaguchi |
| P93 | Space Tracking and Communications Center | | - | Space Tracking and Communications Center, JAXA |
| Q02 | Sakai Observatory | | - | Sakai Observatory, Osaka |
| Q11 | Shinshiro Observatory | | 23 | Shinshiro |
| Q12 | Nagano Observatory (also see #D81) | | - | Nagano Observatory |
| Q19 | Machida Observatory | | - | Machida |
| Q21 | Southern Utsunomiya Observatory | | - | Southern Utsunomiya |
| Q23 | Sukagawa Observatory | | - | Sukagawa |
| Q24 | Katori Observatory | | - | Katori |
| Q33 | Nayoro Observatory | | - | Nayoro Observatory, Hokkaido University |
| Q38 | Lake Boga Observatory (Swan Hill Observatory) Src Archived 2021-11-11 at the Wayback Machine | | Vic | Swan Hill |
| Q54 | Harlingten Telescope, Greenhill Observatory | | TAS | Harlingten Telescope, Greenhill Observatory |
| Q55 | SkyMapper at Siding Spring Observatory | | NSW | SkyMapper, Siding Spring |
| Q56 | Heaven's Mirror Observatory | | NSW | Heaven's Mirror Observatory, Yass |
| Q57 | Korea Microlensing Telescope Network-SSO | | NSW | Korea Microlensing Telescope Network-SSO |
| Q58 | Siding Spring Observatory: LCO Clamshell #1 | | NSW | Siding Spring-LCO Clamshell #1 |
| Q59 | Siding Spring Observatory: LCO Clamshell #2 (Las Cumbres Observatory Global Telescope) | | NSW | Siding Spring-LCO Clamshell #2 |
| Q60 | Siding Spring Observatory: ISON-SSO Observatory | | NSW | ISON-SSO Observatory, Siding Spring |
| Q61 | Siding Spring Observatory: PROMPT | | NSW | PROMPT, Siding Spring |
| Q62 | Siding Spring Observatory: iTelescope Observatory | | NSW | iTelescope Observatory, Siding Spring |
| Q63 | Siding Spring Observatory: LCO A (Las Cumbres Observatory Global Telescope) | | NSW | Siding Spring-LCO A |
| Q64 | Siding Spring Observatory: LCO B (Las Cumbres Observatory Global Telescope) | | NSW | Siding Spring-LCO B |
| Q65 | Warrumbungle Observatory | | NSW | Warrumbungle Observatory |
| Q66 | Siding Spring Observatory: Janess-G, JAXA | | NSW | Siding Spring-Janess-G, JAXA |
| Q67 | JBL Observatory | | NSW | JBL Observatory, Bathurst |
| Q68 | Blue Mountains Observatory | | NSW | Blue Mountains Observatory, Leura |
| Q69 | Hazelbrook (O'Day) | | NSW | Hazelbrook (O'Day) |
| Q70 | Glenlee Observatory Observatory | | QLD | Glenlee Observatory, Glenlee |
| Q78 | Woogaroo Observatory, Forest Lake | | QLD | Woogaroo Observatory, Forest Lake |
| Q79 | Samford Valley Observatory Src | | Qld | Samford Valley Observatory |
| Q80 | Birkdale Observatory | | Qld | Birkdale |
| Q81 | Caloundra West Observatory | | Qld | Caloundra West |
| R17 | Teide Observatory, Tenerife | | CN | ATLAS-TDO |
| R57 | Aorangi Iti Observatory, also see #474 | | Ca | Aorangi Iti Observatory, Lake Tekapo |
| R58 | Beverly-Begg Observatory | | Otg | Beverly-Begg Observatory, Dunedin |
| R65 | R. F. Joyce Observatory | | - | R. F. Joyce Observatory, Christchurch |
| R66 | Mooray Observatory | | - | Mooray Observatory, Christchurch |
| T03 | Haleakala-LCO Clamshell #3 | | HI | Haleakala-LCO Clamshell #3 |
| T04 | Haleakala-LCO OGG B #2 | | HI | Haleakala-LCO OGG B #2 |
| T05 | Asteroid Terrestrial-impact Last Alert System (ATLAS-HKO; at Haleakala Observatory) Src | | HI | ATLAS-HKO, Haleakala |
| T07 | ATLAS-MLO Auxiliary Camera | | - | ATLAS-MLO Auxiliary Camera, Mauna Loa |
| T08 | Asteroid Terrestrial-impact Last Alert System (ATLAS-MLO; at Mauna Loa Observatory) Src | | HI | ATLAS-MLO, Mauna Loa |
| T09 | Mauna Kea-UH/Tholen NEO Follow-Up (Subaru) | | HI | Mauna Kea-UH/Tholen NEO Follow-Up (Subaru) |
| T10 | Submillimeter Array (SMA), Mauna Kea Observatories | | HI | Submillimeter Array, Mauna Kea (SMA) |
| T12 | Mauna Kea-UH/Tholen NEO Follow-Up (2.24-m) Src | | HI | Mauna Kea-UH/Tholen NEO Follow-Up (2.24-m) |
| T14 | Mauna Kea-UH/Tholen NEO Follow-Up (CFHT) | | HI | Mauna Kea-UH/Tholen NEO Follow-Up (CFHT) |
| U52 | Shasta Valley Observatory | | CA | Shasta Valley Observatory, Grenada (?) |
| U53 | Murray Hill Observatory | | OR | Murray Hill Observatory, Beaverton |
| U54 | Hume Observatory | | CA | Hume Observatory, Santa Rosa |
| U55 | Golden Ears Observatory | | BC | Golden Ears Observatory, Maple Ridge |
| U56 | Palo Alto Observatory | | CA | Palo Alto |
| U57 | Black Mountain Observatory | | CA | Black Mountain Observatory, Los Altos |
| U63 | Burnt Tree Hill Observatory | | WA | Burnt Tree Hill Observatory, Cle Elum |
| U64 | Lind Observatory – Central Washington University (CWU) | | WA | CWU-Lind Observatory, Ellensburg |
| U65 | CWU Observatory | | WA | CWU Observatory, Ellensburg |
| U67 | Jack C. Davis Observatory | | NV | Jack C. Davis Observatory, Carson City |
| U68 | JPL SynTrack Robotic Telescope | | CA | JPL SynTrack Robotic Telescope, Auberry |
| U69 | iTelescope SRO Observatory | | CA | iTelescope SRO Observatory, Auberry |
| U70 | RASC Observatory | | CA | RASC Observatory, Alder Springs |
| U71 | AHS Observatory | | CA | AHS Observatory, Castaic |
| U72 | Tarzana Observatory | | CA | Tarzana |
| U73 | Redondo Beach | | CA | Redondo Beach |
| U74 | JPL SynTrack Robotic Telescope 2 | | CA | JPL SynTrack Robotic Telescope 2, Auberry |
| U76 | Maury Lewin Astronomical Observatory; observer: Pablo Lewin | | CA | Glendora |
| U77 | Rani Observatory | | CA | Rani Observatory, San Diego |
| U78 | Cedar Glen Observatory Src Archived 2021-11-11 at the Wayback Machine | | CA | Cedar Glen Observatory |
| U79 | Cosmos Research Center | | CA | Cosmos Research Center, Encinitas |
| U80 | DanHenge Observatory – Center for Solar System Studies (CS3); observer: Daniel Coley Src | | CA | CS3-DanHenge Observatory, Landers |
| U81 | Trojan Station – Center for Solar System Studies (CS3); observer: Robert D. Stephens | | CA | CS3-Trojan Station, Landers |
| U82 | Palmer Divide Station – Center for Solar System Studies (CS3); observer: Brian D. Warner | | CA | CS3-Palmer Divide Station, Landers |
| U83 | Mount Laguna Observatory, Mount Laguna | | CA | Mount Laguna Observatory |
| U96 | Athabasca University Geophysical Observatory Src | | AB | Athabasca University Geophysical Observatory |
| U97 | JPL SynTrack Robotic Telescope 3 | | AZ | JPL SynTrack Robotic Telescope 3, Flagstaff |
| U98 | NAC Observatory; observer: Mike Wiles | | AZ | NAC Observatory, Benson |
| V00 | Bok Telescope at the Kitt Peak National Observatory | | AZ | Kitt Peak-Bok |
| V01 | Mountainville Observatory | | UT | Mountainville Observatory, Alpine |
| V02 | Command Module Observatory; observer: Thomas A. Polakis | | AZ | Command Module, Tempe |
| V03 | Big Water Observatory | | UT | Big Water |
| V04 | FRoST, Anderson Mesa Station, see #688 | | AZ | FRoST, Anderson Mesa |
| V05 | Rusty Mountain Observatory | | AZ | Rusty Mountain Observatory, Gold Canyon |
| V06 | Catalina Sky Survey-Kuiper, also see #703 | | AZ | Catalina Sky Survey-Kuiper |
| V07 | Whipple Observatory PAIRITEL (also see #696 and #G91) | | - | Whipple Observatory, Mount Hopkins-PAIRITEL |
| V08 | Mountain Creek Ranch | | AZ | Mountain Creek Ranch, Vail |
| V09 | Moka Observatory Src | | AZ | Moka Observatory, Benson |
| V10 | Sierra Sinagua Observatory | | AZ | Sierra Sinagua Observatory, Flagstaff |
| V11 | Saguaro Observatory | | AZ | Saguaro Observatory, Tucson |
| V12 | Elgin Observatory | | AZ | Elgin |
| V13 | Little Moose Observatory | | UT | Little Moose Observatory, Timber Lakes |
| V14 | Moose Springs Observatory | | UT | Moose Springs Observatory, Timber Lakes |
| V15 | OWL-Net, Mount Lemmon Observatory | | AZ | OWL-Net, Mt. Lemmon |
| V16 | Crowson Observatory, Dark Sky New Mexico Src | | NM | Dark Sky New Mexico, Animas |
| V17 | Leo Observatory | | AZ | Leo Observatory, Tucson |
| V19 | Whiskey Creek Observatory | | NM | Whiskey Creek Observatory |
| V20 | Killer Rocks Observatory | | NM | Killer Rocks Observatory, Pie Town |
| V21 | Cewanee Observatory at DSNM | | NM | Cewanee Observatory at DSNM |
| V23 | FOAH Observatory | | NM | FOAH Observatory, Magdalena |
| V24 | Sonoran Desert Skies Observatory, observer: Alex Helms | | AZ | Sonoran Desert Skies Observatory, Pearce |
| V26 | UAS-ISON Observatory, Cosala | | - | UAS-ISON Observatory, Cosalá |
| V27 | North Mesa Observatory | | NM | North Mesa Observatory, Los Alamos |
| V28 | Deep Sky West Observatory | | NM | Deep Sky West Observatory, Rowe |
| V29 | Cloudcroft Observatory (Tzec Maun Cloudcroft Facility located at Cloudcroft; also see Mayhill location: #H10) | | NM | Tzec Maun Cloudcroft Facility |
| V30 | Heaven on Earth Observatory | | NM | Heaven on Earth Observatory, Mayhill |
| V31 | Hazardous Observatory | | NM | Hazardous Observatory, Mayhill |
| V32 | Canvas View New Mexico Skies, (at Mayhill location) | | NM | Canvas View New Mexico Skies, Mayhill |
| V34 | Black Forest Observatory | | CO | Black Forest |
| V35 | Deep Sky Observatory | | TX | Deep Sky Observatory Collaborative, Pier 5 |
| V36 | The Ranch Observatory, Artesia | | NM | The Ranch Observatory, Lakewood |
| V37 | McDonald Observatory-LCO ELP, also see #711 | | TX | McDonald Observatory-LCO ELP |
| V38 | McDonald Observatory-LCO ELP Aqawan A #1, also see #711 | | TX | McDonald Observatory-LCO ELP Aqawan A #1 |
| V39 | McDonald Observatory-LCO ELP B | | TX | McDonald Observatory-LCO ELP B |
| V40 | Dark Sky Observatory | | TX | Dark Sky Observatory, Fort Davis |
| V41 | Rapid City Observatory | | SD | Rapid City |
| V42 | Dimension Point Observatory | | NM | Dimension Point, Mayhill |
| V58 | Medina Dome Observatory | | TX | Medina Dome, Medina |
| V59 | Millwood Observatory | | TX | Millwood Observatory, Comfort |
| V60 | Putnam Mountain Observatory Src | | TX | Putman Mountain Observatory |
| V61 | Shed of Science South Observatory | | TX | Shed of Science South, Pontotoc |
| V62 | Live Oak Observatory | | TX | Live Oak Observatory, Pontotoc |
| V63 | Tara Observatory | | TX | Tara Observatory, Cherokee |
| V70 | Starry Night Observatory | | TX | Starry Night Observatory, Columbus |
| V72 | Omaha Observatory | | NE | Omaha |
| V74 | Katy Observatory | | TX | Katy Observatory, Katy |
| V78 | Spirit Marsh Observatory | | MN | Spirit Marsh Observatory. Sauk Centre |
| V81 | Fayetteville Observatory | | NC | Fayetteville |
| V83 | Rolling Hills Observatory | | MO | Rolling Hills Observatory, Warrensburg |
| V86 | Rattle Snake Observatory | | MO | Rattle Snake Observatory, Sedalia |
| V88 | River Ridge Observatory | | AR | River Ridge Observatory, Conway |
| V93 | Pin Oak Observatory, Fort Madison | | IA | Pin Oak Observatory, Fort Madison |
| V94 | Cherokeeridge Observatory | | IA | Cherokeeridge Observatory, Fort Madison |
| W04 | Mark Evans Observatory | | IL | Mark Evans Observatory, Bloomington |
| W08 | Jimginny Observatory | | IL | Jimginny Observatory, Naperville |
| W11 | Calumet Astronomy Center | | IN | Northwest Indiana Robotic Telescope, Lowell |
| W14 | Harvest Observatory | | AL | Harvest |
| W16 | Pleasant Groves Observatory | | AL | Pleasant Groves Observatory |
| W19 | Kalamazoo Observatory | | MI | Kalamazoo |
| W23 | Hevonen Farm Observatory | | OH | Hevonen Farm Observatory, Oxford |
| W22 | WestRock Observatory Src | | GA | WestRock Observatory, Columbus |
| W25 | RMS Observatory | | OH | RMS Observatory, Cincinnati |
| W28 | Ex Nihilo Observatory | | GA | Ex Nihilo Observatory, Winder |
| W30 | Georgia College Observatory | | GA | Georgia College Observatory, Milledgeville |
| W31 | Deerlick Observatory | | GA | Deerlick Observatory, Crawfordville |
| W32 | Crawfordville Observatory | | GA | Crawfordville Observatory |
| W33 | Transit Dreams Observatory | | SC | Transit Dreams Observatory, Campobello |
| W34 | Squirrel Valley Observatory Src | | NC | Squirrel Valley Observatory, Columbus |
| W42 | Mind's Eye Observatory Src | | FL | St Sebastian Preserve Sebastian, Florida Sebastian |
| W38 | Dark Sky Observatory Src | | NC | Dark Sky Observatory, Boone |
| W46 | Foxfire Village Observatory, Foxfire | | NC | Foxfire Village |
| W49 | CBA-MM Observatory | | WV | CBA-MM Observatory, Mountain Meadows |
| W50 | Apex | | NC | Apex |
| W53 | Hagerstown Observatory | | MD | Hagerstown |
| W54 | Mark Slade Remote Observatory Src Archived 2021-11-11 at the Wayback Machine | | VA | Mark Slade Remote Observatory, Wilderness |
| W55 | Natelli Observatory | | MD | Natelli Observatory, Frederick |
| W61 | Leeside Observatory | | ON | Leeside Observatory, Elgin |
| W62 | Comet Hunter Observatory 2 | | PA | Comet Hunter Observatory2, New Ringgold |
| W63 | Astronomical Observatory Technological University Of Pereira (Observatorio Astronómico De la Universidad Tecnológica De Pereira) | | Risaralda | Observatorio Astronomico UTP, Pereira |
| W65 | GOZ Observatory (Observatoire GOZ), Montpellier | | QBC | Observatoire GOZ, Montpellier |
| W66 | SVH Observatory | | NJ | SVH Observatory, Blairstown |
| W67 | Paul Robinson Observatory | | NJ | Paul Robinson Observatory, Voorhees State Park |
| W68 | ATLAS-CHL | | IV | El Sauce Observatory, Rio Hurtado |
| W70 | Loose Goose Observatory | | QC | Loose Goose Observatory, Saint-Jérôme |
| W71 | Rand II Observatory | | NY | Rand II Observatory, Lake Placid |
| W72 | Trumbull Observatory | | CT | Trumbull Observatory, Trumbull |
| W73 | Moquegua Observatory (Observatorio Astronomico de Moquegua) | | - | Observatorio Astronomico de Moquegua, Carumas |
| W74 | Danish National Telescope, ESO-La Silla Observatory | | - | Danish Telescope, La Silla |
| W75 | SPECULOOS-South Observatory, Paranal | | Af | SPECULOOS-South Observatory, Paranal |
| W76 | CHILESCOPE Observatory, Río Hurtado | | Co | CHILESCOPE Observatory, Rio Hurtad |
| W77 | Skyledge Observatory | | CT | Skyledge Observatory, Killingworth |
| W78 | Clay Telescope | | MA | Clay Telescope, Harvard University |
| W79 | Cerro Tololo-LCO Aqawan B #1, see #807 | | Co | Cerro Tololo-LCO Aqawan B #1 |
| W80 | Westwood Observatory | | MA | Westwood |
| W81 | Nebula Knoll Observatory | | NH | Nebula Knoll Observatory, East Wakefield |
| W82 | Mendel Observatory | | MA | Mendel Observatory, Merrimack College |
| W83 | Whitin Observatory | | MA | Whitin Observatory, Wellesley |
| W84 | Cerro Tololo-Dark Energy Camera (DECam) of The Dark Energy Survey, also see #807 | | Co | Cerro Tololo-DECam |
| W85 | Cerro Tololo-LCO A, at #807 | | Co | Cerro Tololo-LCO A |
| W86 | Cerro Tololo-LCO B, at #807 | | Co | Cerro Tololo-LCO B |
| W87 | Cerro Tololo-LCO C, at #807 | | Co | Cerro Tololo-LCO C |
| W88 | Slooh (Slooh.com) | | Co | Slooh.com Chile Observatory, La Dehesa |
| W89 | Cerro Tololo-LCO Aqawan A #1, at #807 | | Co | Cerro Tololo-LCO Aqawan A #1 |
| W90 | Phillips Exeter Academy Grainger Observatory | | NH | Phillips Exeter Academy Grainger Observatory |
| W91 | VHS-VISTA, Cerro Paranal | | - | VHS-VISTA, Cerro Paranal |
| W92 | MASTER-OAFA Observatory | | J | MASTER-OAFA Observatory, San Juan |
| W93 | Korea Microlensing Telescope Network-CTIO | | Af | Korea Microlensing Telescope Network-CTIO |
| W94 | AMACS1, San Pedro de Atacama | | Af | AMACS1, San Pedro de Atacama |
| W95 | Panamanian Observatory (Observatorio Panameño en San Pedro de Atacama) | | Af | Observatorio Panameno, San Pedro de Atacama |
| W96 | CAO (since 2013) | | Af | CAO, San Pedro de Atacama (since 2013) |
| W97 | Atacama Desert Observatory | | Af | Atacama Desert Observatory, San Pedro de Atacama |
| W98 | Polonia Observatory | | Af | Polonia Observatory, San Pedro de Atacama |
| W99 | Atacama Desert Observatory | | Af | SON, San Pedro de Atacama Station |
| X00 | Tolar Observatory (Observatorio Astronomico Tolar) | | - | Observatorio Astronomico Tolar |
| X01 | Hurtado Observatory | | - | Observatory Hurtado, |
| X02 | Telescope Live Observatory | | - | Telescope Live, El Sauce |
| X03 | SADR Observatory (Observatoire SADR) | | - | Observatoire SADR, Poroto |
| X04 | MCD Observatory, Saint-Anaclet | | QC | |
| X05 | Simonyi Survey Telescope, Vera C. Rubin Observatory | | Vera C. Rubin Observatory | |
| X09 | Deep Random Survey | | IV | Deep Random Survey, Rio Hurtado |
| X12 | Los Cabezones Observatory (Observatorio Los Cabezones) | | - | Observatorio Los Cabezones |
| X13 | Bosque Alegre Observatory (Observatorio Remoto Bosque Alegre; Estación Astrofísica de Bosque Alegre, Observatorio Astronómico de Córdoba) | | Cór | Observatorio Remoto Bosque Alegre |
| X14 | Orbis Tertius Observatory (Observatorio Orbis Tertius) | | Cór | Observatorio Orbis Tertius, Córdoba |
| X31 | Galileo Galilei Observatory (Oro Verde Observatory; Observatorio Astronómico de Oro Verde) | | E | Galileo Galilei Observatory, Oro Verde |
| X38 | Pueyrredon Observatory (Observatorio Pueyrredon) | | BA | Observatorio Pueyrredon, La Lonja |
| X39 | Antares Observatory (Observatorio Antares), also see U.S. observatory #H55 | | BA | Observatorio Antares, Pilar |
| X50 | Montevideo Astronomical Observatory (Observatorio Astronomico de Montevideo) | | - | Observatorio Astronomico de Montevideo |
| X57 | CMF Observatory (Polo Astronômico Casimiro Montenegro Filho) and planetarium Src | | PR | Polo Astronomico CMF, Foz do Iguaçu |
| X70 | OATU Observatory (Observatorio OATU) | | SP | Observatorio OATU, Tupi Paulista |
| X74 | Campo dos Amarais Observatory | | SP | Observatorio Campo dos Amarais |
| X87 | Dogsheaven Observatory | | DF | Dogsheaven Observatory, Brasília |
| X88 | Adhara Observatory (Observatório Adhara) | | SP | Observatorio Adhara, Sorocaba |
| X89 | Rocca Observatory | | DF | Rocca Observatory, Brasília |
| X90 | Carina Observatory | | DF | Carina Observatory, Brasília |
| Y00 | SONEAR Observatory ( SONEAR Observatory ), Southern Observatory for Near Earth Asteroids Research (Src) | | MG | SONEAR Observatory, Oliveira |
| Y16 | ROCG Observatory | | - | ROCG, Campos dos Goytacazes |
| Y28 | OASI Observatory, Itacuruba | | PE | OASI, Nova Itacuruba |
| Y40 | Discovery Observatory | | - | Discovery Observatory, Caruaru |
| Y64 | Transient Survey Telescope, TST, Tenerife | | CN | Transient Survey Telescope, TST, Teide |
| Y65 | Two-meter Twin Telescope, TTT1, Tenerife | | CN | Two-meter Twin Telescope, TTT1, Teide |
| Y66 | Two-meter Twin Telescope, TTT2, Tenerife | | CN | Two-meter Twin Telescope, TTT2, Teide |
| Y68 | Two-meter Twin Telescope, TTT3, Tenerife | | CN | Two-meter Twin Telescope, TTT3, Teide |
| Z02 | HAO observatory (at Oukaïmeden Observatory) | | - | HAO observatory, Oukaimeden |
| Z03 | Rio Cofio Observatory | | MD | Rio Cofio, Robledo de Chavela |
| Z05 | Horus Observatory (Observatorio Horus) | | - | Observatorio Horus, Cártama |
| Z06 | Marina Sky Observatory | | Cas | Marina Sky, Nerpio |
| Z07 | Ad Astra Sangos Observatory | | AN | Ad Astra Sangos Observatory, Alhendin |
| Z08 | Telescope Live | | AN | Telescope Live, Oria |
| Z09 | Old Orchard Observatory | | ENG | Old Orchard Observatory, Fiddington |
| Z10 | PGC Observatory, Fregenal de la Sierra | | Ext | PGC, Fregenal de la Sierra |
| Z11 | Appledorne Observatory | | ENG | Appledorne Observatory, Farnsfield |
| Z12 | La Romaneta Observatory, Monòver | | Val | La Romaneta, Monovar |
| Z13 | AGP GUAM 4 Observatory (Observatorio AGP GUAM 4), Málaga | | - | Observatorio AGP GUAM 4, Malaga |
| Z14 | ART Observatory | | Ext | ART, Fregenal de la Sierra |
| Z15 | Southwater Observatory | | ENG | Southwater |
| Z16 | Cartagena Astronomical Association Observatory (Asociacion Astronomica de Cartagena) | | Murcia | Asociacion Astronomica de Cartagena |
| Z17 | Tenerife-LCO Aqawan A #2 | | CN | Tenerife-LCO Aqawan A #2 |
| Z18 | Gran Telescopio Canarias (GranTeCan or GTC; Great Canary Telescope), at Roque de los Muchachos Observatory | | CN | Gran Telescopio Canarias, Roque de los Muchachos |
| Z19 | Galileo National Telescope (Telescopio Nazionale Galileo; TNG) | | CN | La Palma-TNG |
| Z20 | Mercator Telescope | | CN | La Palma-MERCATOR |
| Z21 | Tenerife-LCO Aqawan A #1 | | CN | Tenerife-LCO Aqawan A #1 |
| Z22 | MASTER-IAC Observatory | | CN | MASTER-IAC Observatory, Tenerife |
| Z23 | Nordic Optical Telescope at Roque de los Muchachos Observatory | | Can | Nordic Optical Telescope, La Palma |
| Z24 | Tenerife Observatory-LCO B | | CN | Tenerife Observatory-LCO B, Tenerife |
| Z25 | Artemis Observatory | | Canary Islands | Artemis Observatory, Teide |
| Z26 | Arcangel Observatory (Observatorio Astronomico Arcangel) | | - | Observatorio Astronomico Arcangel, Las Zocas |
| Z27 | Coralito Observatory (Observatorio Coralito) | | - | Observatorio Coralito, La Laguna |
| Z28 | Northern Skygems Observatory | | CLM | Northern Skygems Observatory, Nerpio |
| Z29 | Sobradillo Observatory | | CL | Observatorio Astronomico Sobradillo |
| Z30 | Glyn Marsh Observatory | | IM | Glyn Marsh Observatory, Douglas |
| Z31 | Tenerife Observatory-LCO A | | CN | Tenerife Observatory-LCO A, Tenerife |
| Z32 | Javalambre Observatory, Gúdar-Javalambre | | - | Observatorio Astrofisico de Javalambre |
| Z33 | 6ROADS Observatory 2 | | CM | 6ROADS Observatory 2, Nerpio |
| Z34 | NNHS Drummonds Observatory | | ENG | NNHS Drummonds Observatory |
| Z35 | OAO University of Valencia Observatory at Aras de los Olmos | | V | OAO University of Valencia Observatory at Aras de los Olmos |
| Z36 | Cancelada Observatory | | AN | Cancelada |
| Z37 | Northolt Branch Observatory 3 | | ENG | Northolt Branch Observatory 3, Blandford Forum |
| Z38 | Picoto Observatory | | - | Picoto Observatory, Leiria |
| Z39 | Costa Teguise Observatory (Observatorio Costa Teguise) | | - | Observatorio Costa Teguise |
| Z40 | El Manzanillo Observatory | | AN | El Manzanillo Observatory, Puerto de la Torre |
| Z41 | Irydeo Observatory Src | | MD | Irydeo Observatory, Camarma de Esteruelas |
| Z42 | Rushay Farm Observatory | | ENG | Rushay Farm Observatory, Sturminster Newton |
| Z43 | Landéhen Observatory | | Brittany | Landéhen |
| Z44 | Terminus Observatory (Observatorio Terminus) | | GA | Observatorio Terminus, A Coruña |
| Z45 | Cosmos Observatory | | AN | Cosmos Observatory, Marbella |
| Z46 | Cardiff Observatory | | WLS | Cardiff |
| Z47 | Runcorn Observatory | | ENG | Runcorn |
| Z48 | Northolt Branch Observatory 2 | | ENG | Northolt Branch Observatory 2, Shepherd's Bush |
| Z49 | Alston Observatory, Longridge | | ENG | Alston Observatory |
| Z50 | Mazariegos Observatory | | CL | Mazariegos |
| Z51 | Anunaki Observatory | | MD | Anunaki Observatory, Rivas-Vaciamadrid |
| Z52 | The Studios Observatory | | ENG | The Studios Observatory, Grantham |
| Z53 | TRAPPIST–North, at Oukaïmden Observatory (#J43) | | - | TRAPPIST-North, Oukaïmeden |
| Z54 | Greenmoor Observatory | | ENG | Greenmoor Observatory, Woodcote |
| Z55 | Uraniborg Observatory, Ecija Sevilla Src | | - | Uraniborg Observatory, Ecija |
| Z56 | Knocknaboola Observatory | | - | Knocknaboola |
| Z57 | Zuben Observatory (Observatorio Zuben) | | - | Observatorio Zuben, Alhaurín de la Torre |
| Z58 | ESA Cebreros TBT Observatory | | - | ESA Cebreros TBT Observatory, Cebreros |
| Z59 | Chelford Observatory | | - | Chelford Observatory |
| Z60 | Zaldibia Observatory (Observatorio Zaldibia) | | - | Observatorio Zaldibia |
| Z61 | Montecanal Observatory | | - | Montecanal Observatory, Zaragoza |
| Z62 | Forcarei Observatory (Observatorio Forcarei) | | - | Observatorio Forcarei |
| Z63 | skybor Observatory | | - | Skybor Observatory, Borja |
| Z64 | Miron del Cielo Observatory (Observatorio el Miron del Cielo) | | - | Observatorio el Miron del Cielo |
| Z65 | Corgas Observatory (Observatorio Astronómico Corgas) Src Archived 2019-01-19 at the Wayback Machine | | GA | Observatorio Astronomico Corgas |
| Z66 | Deimos Sky Survey (DeSS) Src Archived 2019-03-29 at the Wayback Machine | | CM | DeSS Deimos Sky Survey, Niefla Mountain |
| Z67 | Dunboyne Castle Observatory Src | | - | Dunboyne Castle Observatory |
| Z68 | Torreáguila Observatory (Observatorio Torreáguila) | | Extremadura | Observatorio Torreaguila, Barbaño |
| Z69 | Mazagon Observatory (Observatorio Mazagón Huelva; Observatorio Mazagón) Src | | AN | Observatorio Mazagón Huelva |
| Z70 | Ponferrada Observatory | | CL | Ponferrada |
| Z71 | Observatorio Norba Caesarina, Cáceres Observatorio Src | | - | Observatorio Norba Caesarina, Aldea Moret |
| Z72 | Cademuir Observatory | | - | Cademuir Observatory, Dalkey |
| Z73 | Nuevos Horizontes Observatory (Observatorio Nuevos Horizontes) | | - | Observatorio Nuevos Horizontes, Camas |
| Z74 | Amanecer de Arrakis Observatory, observer: Francisco Soldán | | AN | Amanecer de Arrakis |
| Z75 | Sirius Observatory (Observatorio Sirius) | | - | Observatorio Sirius, Las Lomas |
| Z76 | Carda Observatory (Observatorio Carda) | | Asturias | Observatorio Carda, Villaviciosa |
| Z77 | Osuna Observatory | | AN | Osuna |
| Z78 | Arroyo Observatory | | - | Arroyo Observatory, Arroyo Hurtado |
| Z79 | Calar Alto TNO Survey, at #493 | | AN | Calar Alto TNO Survey |
| Z80 | Northolt Branch Observatory | | ENG | Northolt Branch Observatory |
| Z81 | Estrella de Mar Observatory (Observatorio Estrella de Mar) | | - | Observatorio Estrella de Mar |
| Z82 | BOOTES-2 Observatory | | - | BOOTES-2 Observatory, Algarrobo |
| Z83 | Chicharronian 3C Observatory | | MD | Chicharronian 3C Observatory, Tres Cantos |
| Z84 | Calar Alto-Schmidt (see also #493) Src | | AN | Calar Alto-Schmidt |
| Z85 | Sierra Contraviesa Observatory (Observatorio Sierra Contraviesa) | | - | Observatorio Sierra Contraviesa |
| Z86 | St. Mellons Observatory | | WLS | St. Mellons |
| Z87 | Stanley Laver Observatory | | ENG | Stanley Laver Observatory, Pontesbury |
| Z88 | Fosseway Observatory | | ENG | Fosseway Observatory, Stratton-on-the-Fosse |
| Z89 | Macclesfield Observatory | | ENG | Macclesfield |
| Z90 | Albox Observatory | | AN | Albox |
| Z91 | Curdridge Observatory | | ENG | Curdridge |
| Z92 | West Park Observatory | | ENG | West Park Observatory, Leeds |
| Z93 | Observatorio Polop | | V | Observatorio Polop, Alicante |
| Z94 | Kempshott Observatory | | ENG | Kempshott |
| Z95 | Astronomía Para Todos Remote Observatory | | - | Astronomia Para Todos Remote Observatory |
| Z96 | Cesaraugusto Observatory (Observatorio Cesaraugusto) | | - | Observatorio Cesaraugusto |
| Z97 | OPERA Observatory (Observatoire OPERA) | | - | OPERA Observatory, Saint Palais |
| Z98 | TRZ Observatory (Observatorio TRZ) | | V | Observatorio TRZ, Bétera |
| Z99 | Clixby Observatory | | ENG | Clixby Observatory, Cleethorpes |
