(20391) Ivantsov Main-belt Asteroid
Discovered on 23 May 1998 by LINEAR at Socorro.
Anatoliy Ivantsov (b. 1974) is a Ukrainian astronomer at the Royal Observatory of Belgium, specializing in high precision astrometry and orbital mechanics of asteroids. His contributions include precovery, mass determination, ephemeris generation and coordination of astrometry campaigns for solar system objects with meter-class telescopes.Naming citation (WGSBN Bull. 6, #11, 17), IAU / Minor Planet Center, via NASA/JPL
Where Ivantsov is today
Seen from above the solar system on 2026-10-14: Ivantsov is 3.27 au from the Sun and 3.54 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20391 |
| Provisional designation | 1998 KT55 |
| Orbit class | Main-belt Asteroid |
| Diameter | 10.3 km (#4,947 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.127 |
| Absolute magnitude (H) | 12.89 |
| Orbital period | 4.33 years |
| Semi-major axis | 2.66 au |
| Perihelion – aphelion | 2.03 – 3.28 au |
| Eccentricity | 0.236 |
| Inclination | 17.5° |
| Closest distance between its orbit and Earth's (MOID) | 1.04 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Anatoliy
All asteroids named after someone called Anatoliy
Also discovered on 23 May 1998
- (12864) Ryandrake
- (18730) Wingip
- (18731) Vil'bakirov
- (19494) Gerbs
- (19495) Terentyeva
- (19500) Hillaryfultz
- (20366) Bonev
- (20367) Erikagibb
- (20382) Hiroshinaraoka
- (20383) Hirotakasawada
- (20384) Hongsuhyim
- (20385) Horiuchi