(2121) Sevastopol
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Asteroid (2121) Sevastopol |
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| Properties of the orbit ( animation ) | |
| Orbit type | Inner main belt asteroid |
| Major semi-axis | 2.1835 AU |
| eccentricity | 0.1786 |
| Perihelion - aphelion | 1.7935 AU - 2.5734 AU |
| Inclination of the orbit plane | 4.3783 ° |
| Length of the ascending node | 145.7097 ° |
| Argument of the periapsis | 160.127 ° |
| Time of passage of the perihelion | 19th January 2020 |
| Sidereal period | 3.23 a |
| Mean orbital velocity | 20.15 km / s |
| Physical Properties | |
| Medium diameter | 8.736 (± 0.037) km |
| Albedo | 0.308 (± 0.023) |
| Rotation period | 2.90640 h (± 0.00002) |
| Absolute brightness | 12.2 mag |
| history | |
| Explorer | Tamara Smirnova |
| Date of discovery | June 27, 1971 |
| Another name | 1971 ME , 1932 HM, 1936 WD, 1938 DY, 1939 TO, 1952 SZ, 1968 QJ 1 , 1977 ED 2 , 1978 WG |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(2121) Sevastopol is an asteroid of the main inner belt that was discovered by the Soviet astronomer Tamara Smirnova on June 27, 1971 at the Crimean Observatory in Nautschnyj ( IAU code 095).
There had been unconfirmed sightings of the asteroid before: on April 29, 1932 under the provisional designation 1932 HM at the Union Observatory in Johannesburg , in November 1936 (1936 WD) at the French Observatoire de Nice , 1938 (1938 DY) at Iso-Heikkilä -Observatory of the University of Turku , 1939 (1939 TO) again at the Union Observatory in Johannesburg, on September 29, 1952 (1952 SZ) at the Goethe Link Observatory in Indiana and on August 28, 1968 (1968 QJ 1 ) in the Crimea Observatory in Nautschnyj.
The mean diameter of (2121) Sevastopol was calculated to be 8.736 (± 0.037) km , the albedo as 0.308 (± 0.023). The rotation period is 2.90640 h (± 0.00002).
The Italian astronomer Vincenzo Zappalà defines in a publication from 1995 (et al.) That the asteroid belongs to the Augusta family, a group of asteroids named after (254) Augusta .
(2121) Sevastopol was on 28 January 1983 after Sevastopol named, the largest town on the peninsula of Crimea . The name was given to mark the 200th anniversary of the city's founding.
Moon S / 2010 (2121) 1
During photometric observations of (2121) Sevastopol between July 23 and August 24, 2010, it was found that the asteroid at a distance of 26 km has a companion that is approximately 41 percent of its size, namely 3.54 km (± 0.017 ) km. It takes the Moon 1.546 days to orbit Sevastopol around (2121). Both bodies orbit a common center of gravity in 37.1 hours. The companion was given the provisional designation S / 2010 (2121) 1 .
Web links
- (2121) Sevastopol in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (2121) Sevastopol in the Small-Body Database of the Jet Propulsion Laboratory (English).
- Discovery Circumstances of (2121) Sevastopol according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
- Overview page about the companion of (2121) Sevastopol , last updated on September 21, 2014 (English)
Individual evidence
- ↑ (2121) Sevastopol at the IAU Minor Planet Center (English)
- ↑ Database with the assignment of 12,487 asteroids to asteroid groups (English)
- ^ Lutz D. Schmadel : Dictionary of Minor Planet Names . Springer, Heidelberg 2012, 6th edition, page 164f (English)
- ↑ David Higgins, Petr Pravec , Peter Kušnirák , Joseph Pollock , Julian Oey , Marek Husárik, Gabriel Cervak, Daniel E. Reichart, Kevin M. Ivarsen, Joshua Haislip, Aaron P. LaCluyze: Electronic Telegram No. 2427 of the International Astronomical Union (IAU)