Discovery [1] | |
---|---|
Discovered by | G. Neujmin |
Discovery site | Simeiz Obs. |
Discovery date | 25 August 1916 |
Designations | |
(830) Petropolitana | |
Pronunciation | /pɪˌtrɒpəlɪˈteɪnə/ |
Named after | Saint Petersburg (Russian city) [2] |
A916 QE ·1933 RK 1949 KW ·A917 YD 1916 ZZ ·1917 Σgb | |
Orbital characteristics [3] | |
Epoch 31 May 2020 (JD 2459000.5) | |
Uncertainty parameter 0 | |
Observation arc | 103.34 yr (37,745 d) |
Aphelion | 3.4169 AU |
Perihelion | 3.0002 AU |
3.2085 AU | |
Eccentricity | 0.0649 |
5.75 yr (2,099 d) | |
297.36° | |
0° 10m 17.4s / day | |
Inclination | 3.8028° |
340.28° | |
90.940° | |
Physical characteristics | |
Mean diameter | |
39.0±0.5 h [10] | |
Pole ecliptic latitude | |
9.10 [1] [3] | |
830 Petropolitana (prov. designation: A916 QEor1916 ZZ) is a bright background asteroid from the outer regions of the asteroid belt. It was discovered on 25 August 1916, by Russian astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula. [1] The stony S-type asteroid has a long rotation period of 39.0 hours and measures approximately 41 kilometers (25 miles) in diameter. It was named after the Russian city of Saint Petersburg. [2]
Petropolitana is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. [4] [5] It orbits the Sun in the outer asteroid belt at a distance of 3.0–3.4 AU once every 5 years and 9 months (2,099 days; semi-major axis of 3.21 AU). Its orbit has an eccentricity of 0.06 and an inclination of 4° with respect to the ecliptic. [3] The body's observation arc begins at Heidelberg Observatory on 3 September 1916, or nine nights after its official discovery observation at Simeiz. [1]
This minor planet was named by its Latin name "Petropolis", after the Russian city of Saint Petersburg. On the same night, Grigory Neujmin also discovered 829 Academia. Both asteroid were named on the occasion of the 200th anniversary of the founding of the Academy of Sciences in Staint Petersburg. The naming was also mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 82 ). [2]
In the Tholen classification, Petropolitana is a stony S-type asteroid, [3] [5] which are more common in the inner than in the outer asteroid belt.
In March 2005, a rotational lightcurve of Petropolitana was obtained from photometric observations by French amateur astronomer Pierre Antonini. Lightcurve analysis gave a rotation period of 39.0±0.5 hours with a brightness variation of 0.15±0.01 magnitude ( U=2 ). [10]
In 2016, a modeled lightcurve gave a concurring sidereal period of 37.347±0.005 hours using data from a large collaboration of individual observers (such as above). The study also determined two spin axes of (217.0°, 36.0°) and (34.0°, 41.0°) in ecliptic coordinates (λ, β). [11] In 2018, however, an international photometric survey, using archived photometric data from the Geneva Observatory as well from dedicated observations, modeled a far longer period of 169.52±0.06 hours with an amplitude of 0.42±0.05 magnitude ( U=2 ). The survey uses combines convex lightcurve inversion with a non-convex algorithm (SAGE) to derive their periods. [12]
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), and the Japanese Akari satellite, Petropolitana measures (41.22±1.6), (41.328±0.131) and (48.47±0.92) kilometers in diameter and its surface has an albedo of (0.2382±0.020), (0.216±0.049) and (0.174±0.008), respectively. [6] [7] [8] [9] Alternative mean-diameters published by the WISE team include (43.41±1.15 km) and (51.355±0.403 km) with corresponding albedos of (0.215±0.019) and (0.1542±0.0389). [5] The Collaborative Asteroid Lightcurve Link, adopts the results obtained by IRAS, that is an albedo of 0.2382 and a diameter of 41.22 kilometers based on an absolute magnitude of 9.10. [13]
Two asteroid occultations of Petropolitana from May 2012 and September 2015, gave a best-fit ellipse dimension of (48.0 km × 48.0 km) and (46.0 km × 46.0 km), respectively. [5] These timed observations are taken when the asteroid passes in front of a distant star.
606 Brangäne, provisional designation 1906 VB, is an asteroid from the central regions of the asteroid belt, approximately 36 kilometers in diameter. It was discovered on 18 September 1906, by astronomer August Kopff at the Heidelberg Observatory in southwest Germany. The unusual K-type asteroid is the namesake of the small Brangäne family and has a rotation period of 12.3 hours. It was named after Brangaine, a character from the opera Tristan und Isolde by Richard Wagner.
706 Hirundo is an elongated background asteroid, located in the central region of the asteroid belt. It was discovered by German astronomer Joseph Helffrich at the Heidelberg Observatory on 9 October 1910. The carbonaceous C-type asteroid (Cgh) has a rotation period of 22.0 hours and measures approximately 30 kilometers in diameter. It was named after the bird genus Hirundo, commonly known as swallows.
826 Henrika is a background asteroid from the central regions of the asteroid belt. It was discovered by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory on 28 April 1916. The carbonaceous C-type asteroid has a rotation period of 5.98 hours and measures approximately 21 kilometers in diameter. Any reference to the origin of the asteroid's name is unknown.
834 Burnhamia is a large background asteroid, approximately 61 kilometers in diameter, that is located in the outer region of the asteroid belt. It was discovered on 20 September 1916, by German astronomer Max Wolf at the Heidelberg Observatory in southwest Germany. The X-type asteroid (GS) has a rotation period of 13.9 hours. It was named after American astronomer Sherburne Wesley Burnham (1838–1921).
835 Olivia is a dark background asteroid from the outer regions of the asteroid belt. It was discovered by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory on 23 September 1916. The carbonaceous C-type asteroid measures approximately 35 kilometers in diameter, and is one of few low-numbered asteroids with an undetermined rotation period. Any reference to the origin of the asteroid's name is unknown.
842 Kerstin is a dark background asteroid from the outer regions of the asteroid belt. It was discovered on 1 October 1916, by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory in southwest Germany. The assumed C-type asteroid has a rotation period of 18.7 hours and measures approximately 41 kilometers in diameter. Any reference of the origin of the asteroid's name is unknown.
907 Rhoda is a large background asteroid from the central region of the asteroid belt, that measures approximately 75 kilometers in diameter. It was discovered on 12 November 1918, by astronomer Max Wolf at the Heidelberg Observatory in southwest Germany. The dark C/X-type asteroid has a long rotation period of 22.4 hours and is likely spherical in shape. It was named after Rhoda Barnard, wife of American astronomer Edward Emerson Barnard (1857–1923).
Lagrangea, provisional designation 1923 OU, is a carbonaceous background asteroid from the outer region of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 12 September 1923, by Russian astronomer Sergey Belyavsky at the Simeiz Observatory on the Crimean peninsula. The asteroid was named after Italian mathematician and astronomer Joseph-Louis Lagrange.
1135 Colchis ; prov. designation: 1929 TA) is a background asteroid from the central region of the asteroid belt. It was discovered on 3 October 1929, by Soviet astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula. The X-type asteroid has a rotation period of hours 23.5 and measures approximately 49 kilometers in diameter. It was named for the ancient Kingdom of Colchis.
1118 Hanskya is a large background asteroid, approximately 77 kilometers in diameter, located in the outer regions of the asteroid belt. Discovered by Sergey Belyavsky and Nikolaj Ivanov in 1927, it was named after Russian astronomer Aleksey Hansky. The presumed dark C-type asteroid has a rotation period of 15.6 hours.
2531 Cambridge, provisional designation 1980 LD, is a stony Eoan asteroid from the outer regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 11 June 1980, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Arizona, United States. The asteroid was named for the Cambridge University.
1294 Antwerpia (prov. designation: 1933 UB1) is a dark background asteroid from the central regions of the asteroid belt. It was discovered on 24 October 1933, by astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle. The carbonaceous C-type asteroid has a rotation period of 6.6 hours and measures approximately 35 kilometers (22 miles) in diameter. It was named for the Belgian city of Antwerp.
3544 Borodino (prov. designation: 1977 RD4) is a stony background asteroid from the inner regions of the asteroid belt, approximately 9 kilometers (5.6 miles) in diameter. It was discovered on 7 September 1977, by Soviet astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula. The likely elongated S-type asteroid has a rotation period of 5.44 hours. It was named for the Russian village of Borodino where the Battle of Borodino took place.
1275 Cimbria is a Eunomia asteroid from the central regions of the asteroid belt, approximately 27 kilometers in diameter. It was discovered on 30 November 1932, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southern Germany. The asteroid was named after the Cimbri, an ancient Germanic tribe.
1328 Devota, provisional designation 1925 UA, is a dark background asteroid from the outermost regions of the asteroid belt, approximately 56 kilometers in diameter. It was discovered on 21 October 1925, by Russian–French astronomer Benjamin Jekhowsky at the Algiers Observatory in North Africa. The asteroid was named after Argentine astronomer Fortunato Devoto.
1524 Joensuu, provisional designation 1939 SB, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 42 kilometers in diameter. It was discovered on 18 September 1939, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, and named for the town of Joensuu.
1760 Sandra, provisional designation 1950 GB, is a carbonaceous asteroid from the outer regions of the asteroid belt, approximately 35 kilometers in diameter. It was discovered on 10 April 1950, by South African astronomer Ernest Johnson at Union Observatory in Johannesburg, and named after his granddaughter Sandra.
1847 Stobbe, provisional designation A916 CA, is an asteroid from the middle region of the asteroid belt, approximately 23 kilometers in diameter.
1801 Titicaca (prov. designation: 1952 SP1) is a stony Eos asteroid from the asteroid belt, approximately 22 kilometers in diameter. It was discovered on 23 September 1952, by Argentine astronomer Miguel Itzigsohn at La Plata Observatory in the capital of the province of Buenos Aires. It was named after Lake Titicaca in South America.
1535 Päijänne, provisional designation 1939 RC, is an asteroid from the outer region of the asteroid belt, approximately 25 kilometers in diameter. It was discovered on 9 September 1939, by Finnish astronomer Yrjö Väisälä at the Turku Observatory in Southwest Finland. It was later named for Lake Päijänne.