(6185) Mitsuma Main-belt Asteroid
Discovered on 20 December 1987 by T. Kojima at Chiyoda.
Shigeo Mitsuma (1956-2012) was a member of Hoshinohiroba (the Japanese Comet Observers Network) and an independent discoverer of C/1987 B1 (Nishikawa-Takamizawa-Tago). He also observed sunspots and search for novae.Naming citation (20121228/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Mitsuma is today
Seen from above the solar system on 2026-10-14: Mitsuma is 2.23 au from the Sun and 1.25 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 6185 |
| Provisional designation | 1987 YD |
| Orbit class | Main-belt Asteroid |
| Diameter | 9.95 km (#5,129 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0740 |
| Rotation period | 21.1 hours |
| Absolute magnitude (H) | 13.27 |
| Orbital period | 3.58 years |
| Semi-major axis | 2.34 au |
| Perihelion – aphelion | 1.94 – 2.74 au |
| Eccentricity | 0.172 |
| Inclination | 8.76° |
| Closest distance between its orbit and Earth's (MOID) | 0.966 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Shigeo
All asteroids named after someone called Shigeo
Also discovered on 20 December 1987
More named asteroids discovered by T. Kojima
- (3774) Megumi
- (3786) Yamada
- (3829) Gunma
- (3995) Sakaino
- (3998) Tezuka
- (3999) Aristarchus
- (4041) Miyamotoyohko
- (4156) Okadanoboru
- (4288) Tokyotech
- (4493) Naitomitsu
- (4576) Yanotoyohiko
- (4632) Udagawa
← (6184) Nordlund · (6186) Zenon →