(21104) Sveshnikov Mars-crossing Asteroid
Discovered on 8 August 1992 by E. W. Elst at Caussols.
Mikhail Leonidovich Sveshnikov (b. 1941) is a well-known expert in celestial mechanics and astrometry. He is Editor-in-Chief of the Russian Naval Astronomical Almanac. From 2001 to 2004, he headed the Laboratory of the astronomical yearbooks of the Institute of Applied Astronomy of the Russian Academy of Sciences.Naming citation (20110715/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Sveshnikov is today
Seen from above the solar system on 2026-10-14: Sveshnikov is 2.97 au from the Sun and 3.93 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21104 |
| Provisional designation | 1992 PY |
| Orbit class | Mars-crossing Asteroid |
| Diameter | 3.61 km (#13,672 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.446 |
| Rotation period | 2.84 hours |
| Absolute magnitude (H) | 13.83 |
| Orbital period | 3.58 years |
| Semi-major axis | 2.34 au |
| Perihelion – aphelion | 1.65 – 3.04 au |
| Eccentricity | 0.297 |
| Inclination | 21.4° |
| Closest distance between its orbit and Earth's (MOID) | 0.794 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Mikhail
- (2205) Glinka
- (2222) Lermontov
- (4729) Mikhailmil'
- (4920) Gromov
- (5043) Zadornov
- (5931) Zhvanetskij
- (6214) Mikhailgrinev
- (6538) Muraviov
- (7161) Golitsyn
- (7268) Chigorin
- (7322) Lavrentina
- (7370) Krasnogolovets
All asteroids named after someone called Mikhail
Also discovered on 8 August 1992
- (7296) Lamarck
- (8523) Bouillabaisse
- (8687) Caussols
- (8688) Delaunay
- (9059) Dumas
- (12320) Loschmidt
- (13088) Filipportera
- (20032) McNish
- (20033) Michaelnoble
- (22341) Francispoulenc
- (90732) Opdebeeck