![]() Modelled shape of Prisma from its lightcurve | |
Discovery [1] | |
---|---|
Discovered by | A. Schwassmann |
Discovery site | Bergedorf Obs. |
Discovery date | 17 March 1931 |
Designations | |
(1192) Prisma | |
Named after | Bergedorf Spectral Catalogue (astronomical catalog) [2] |
1931 FE | |
main-belt ·(inner) Phocaea [3] [4] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 85.77 yr (31,328 days) |
Aphelion | 2.9762 AU |
Perihelion | 1.7561 AU |
2.3661 AU | |
Eccentricity | 0.2578 |
3.64 yr (1,329 days) | |
297.62° | |
0° 16m 14.88s / day | |
Inclination | 23.902° |
1.3517° | |
131.44° | |
Physical characteristics | |
Dimensions | 7.22 km (calculated) [3] 7.377±0.193 km [5] 9.27±0.25 km [6] |
6.546±0.0170 h [7] 6.558 h [8] 6.55836±0.00005 h [9] [10] | |
0.144±0.009 [6] 0.220±0.022 [5] 0.23 (assumed) [3] | |
S [3] | |
12.497±0.008(R) [7] ·12.87±0.47 [11] ·12.92 [1] [3] [5] [6] | |
1192 Prisma, provisional designation 1931 FE, is an elongated Phocaea asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by German astronomer Friedrich Schwassmann at the Bergedorf Observatory in Hamburg on 17 March 1931. [12] The asteroid was named after the Bergedorf Spectral Catalogue, an astronomical catalog. [2]
Prisma is a member of the Phocaea family ( 701 ), a prominent family of S-type asteroids with their largest members being 25 Phocaea and 587 Hypsipyle. There are many Mars-crossers among this family of relatively eccentric inner main-belt asteroids . [13]
The asteroid orbits the Sun at a distance of 1.8–3.0 AU once every 3 years and 8 months (1,329 days). Its orbit has an eccentricity of 0.26 and an inclination of 24° with respect to the ecliptic. [1] The body's observation arc begins at Bergedorf, one week after its official discovery observation. [12]
Photometric observations of Prisma gave a well defined rotational lightcurve with a period between 6.546 and 6.558 hours and a high brightness variation of 0.85–1.16 magnitude, which strongly indicates that the body has an elongated, non-spheroidal shape ( U=3/3 ). [7] [8]
A modeled lightcurve based on optical data from a large collaboration network also found a spin axis of (133.0°, −78.0°) in ecliptic coordinates (λ, β) ( Q=n.a. ). [9] [10]
According to the surveys carried out by the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Prisma measures between 7.38 and 9.27 kilometers in diameter and its surface has an albedo between 0.144 and 0.220. [5] [6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo of 0.23 and calculates a diameter of 7.22 kilometers based on an absolute magnitude of 12.92. [3]
This minor planet was named "Prisma" (prism) in honour of the Bergedorf Spectral Catalogue (German : Bergedorfer Spektralkatalog), as prisms are one method of obtaining spectra. [2] The official naming citation was also published in Paul Herget's The Names of the Minor Planets in 1955 ( H 111 ). [2]
Brucia is a stony Phocaea asteroid and former Mars-crosser from the inner regions of the asteroid belt, approximately 33 kilometers in diameter. It was the first asteroid to be discovered by the use of astrophotography.
Phocaea is a stony asteroid from the inner regions of the asteroid belt, approximately 75 kilometers in diameter. It is the parent body of the Phocaea family. Discovered by Jean Chacornac in 1853, it was named after the ancient Greek city of Phocaea.
1834 Palach, provisional designation 1969 QP, is a stony Eoan asteroid from the outer region of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 22 August 1969 by Czech astronomer Luboš Kohoutek at Bergedorf Observatory in Hamburg, Germany, and named after Czech student Jan Palach.
Lilofee, provisional designation 1923 OK, is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 33 kilometers in diameter. It was discovered on 13 September 1923, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after the Black Forest mermaid "Lilofee" from German folklore.
1164 Kobolda, provisional designation 1930 FB, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. Discovered by Karl Reinmuth at Heidelberg Observatory in 1930, the asteroid was later named after German astronomer Hermann Kobold.
9963 Sandage, provisional designation 1992 AN, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter.
6398 Timhunter, provisional designation 1991 CD1, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 5.5 kilometers in diameter. It was discovered on 10 February 1991, by American astronomer couple Carolyn and Eugene Shoemaker, in collaboration with Canadian astronomer David H. Levy at Palomar Observatory in California, United States. It was named for American amateur astronomer Tim Hunter.
1568 Aisleen, provisional designation 1946 QB, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 12.5 kilometers in diameter. It was discovered on 21 August 1946, by South African astronomer Ernest Johnson at Johannesburg Observatory in South Africa. It is named for the discoverer's wife, Aisleen Johnson.
1987 Kaplan, provisional designation 1952 RH, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered on 11 September 1952, by Soviet astronomer Pelageya Shajn at the Simeiz Observatory on the Crimean peninsula. The asteroid was named after Soviet astrophysicist Samuil Kaplan.
1378 Leonce, provisional designation 1936 DB, is a dark Nysian asteroid from the inner regions of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 21 February 1936, by Belgian astronomer Fernand Rigaux at the Royal Observatory of Belgium in Uccle, who named it after his father, Leonce Rigaux.
3322 Lidiya, provisional designation 1975 XY1, is a stony Phocaea asteroid and potentially slow rotator from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 1 December 1975, by Soviet astronomer Tamara Smirnova at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula. The asteroid was named after Russian aviator Lidiya Zvereva.
2696 Magion, provisional designation 1980 HB, is a dark background asteroid and a slow rotator from the inner regions of the asteroid belt, approximately 21 kilometers in diameter. It was discovered on 16 April 1980, by Slovak astronomer Ladislav Brožek at the Kleť Observatory in former Czechoslovakia. The X-type asteroid has an ambiguous rotation period of 480 hours and is possibly a tumbler. It was named for the first Czechoslovak satellite, Magion 1, launched in 1978.
1174 Marmara, provisional designation 1930 UC, is a stony Eoan asteroid from the outer regions of the asteroid belt, approximately 17 kilometers in diameter. It was discovered on 17 October 1930, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. The asteroid was later named after the Sea of Marmara, located between Europe and Asia.
1841 Masaryk (prov. designation: 1971 UO1) is a carbonaceous background asteroid from the outer region of the asteroid belt, approximately 46 kilometers in diameter. It was discovered on 26 October 1971, by Czech astronomer Luboš Kohoutek at Bergedorf Observatory in Hamburg, Germany. The asteroid was named after the first President of Czechoslovakia, Tomáš Garrigue Masaryk.
1318 Nerina, provisional designation 1934 FG, is a Phocaea asteroid from the inner regions of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 24 March 1934, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The possibly metallic X-type asteroid has a notably short rotation period of 2.5 hours. It was named for the flowering plant Nerine, also known as "Guernsey lily" or "Jersey lily".
1512 Oulu, provisional designation 1939 FE, is a dark Hildian asteroid, slow rotator and possibly the largest known tumbler orbiting in the outermost region of the asteroid belt. With a diameter of approximately 80 kilometers, it belongs to the fifty largest asteroids in the outer main-belt. The body was discovered on 18 March 1939, by Finnish astronomer Heikki Alikoski at Turku Observatory in Southwest Finland and named for the Finnish town Oulu.
1350 Rosselia, provisional designation 1934 TA, is a stony Koronian asteroid from the outer regions of the asteroid belt, approximately 22 kilometers in diameter. Discovered by astronomer Eugène Delporte at the Royal Observatory of Belgium in 1934, the asteroid was later named after Marie-Thérèse Rossel, editor of the Belgian newspaper Le Soir.
1276 Ucclia is a carbonaceous Alauda asteroid from the outer region of the asteroid belt, approximately 31 kilometers in diameter. It was discovered on 24 January 1933 by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle. Two nights later, the body was independently discovered by Richard Schorr at Bergedorf Observatory in Hamburg, Germany. It was named for the Belgium city of Uccle and its discovering observatory.
2014 Vasilevskis, provisional designation 1973 JA, is a stony Phocaean asteroid from the inner regions of the asteroid belt, approximately 10 kilometers (6.2 mi) in diameter. It was discovered on 2 May 1973, by American astronomer Arnold Klemola at the U.S. Lick Observatory on Mount Hamilton, California. It was named after Stanislavs Vasilevskis, staff member at the discovering observatory.
24827 Maryphil, provisional designation 1995 RA, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 2 September 1995, by American astronomer Timothy Spahr at the Catalina Station near Tucson, Arizona, who named it for his parents, Mary & Phil Spahr.