(12003) Hideosugai Outer Main-belt Asteroid
Discovered on 20 March 1996 by T. Okuni at Nanyo.
Hideo Sugai (b. 1930), a retired teacher, is a Japanese amateur astronomer. He has been observing variable stars since 1951, and his data have been reported to the Variable Star Observers League in Japan.Naming citation (20010804/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Hideosugai is today
Seen from above the solar system on 2026-10-14: Hideosugai is 3.40 au from the Sun and 4.38 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12003 |
| Provisional designation | 1996 FM5 |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 22.8 km (#1,881 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0450 |
| Rotation period | 9.01 hours |
| Absolute magnitude (H) | 12.29 |
| Orbital period | 6.17 years |
| Semi-major axis | 3.36 au |
| Perihelion – aphelion | 3.06 – 3.67 au |
| Eccentricity | 0.0909 |
| Inclination | 9.81° |
| Closest distance between its orbit and Earth's (MOID) | 2.09 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Hideo
- (4948) Hideonishimura
- (6902) Hideoasada
- (7442) Inouehideo
- (8036) Maehara
- (9114) Hatakeyama
- (12047) Hideomitani
- (24816) Einagahideo
- (25143) Itokawa
- (90953) Hideosaitou
All asteroids named after someone called Hideo