(10138) Ohtanihiroshi Main-belt Asteroid
Discovered on 16 September 1993 by Endate, K., Watanabe, K. at Kitami.
Hiroshi Ohtani (b. 1939) is a professor in the department of astronomy at Kyoto University. His research themes include observational and theoretical studies of interstellar matter and observational study of active galaxies, especially of Seyfert and related galaxies.Naming citation (20020328/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Ohtanihiroshi is today
Seen from above the solar system on 2026-10-14: Ohtanihiroshi is 2.43 au from the Sun and 1.55 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10138 |
| Provisional designation | 1993 SS1 |
| Orbit class | Main-belt Asteroid |
| Rotation period | 13.2 hours |
| Absolute magnitude (H) | 14.08 |
| Orbital period | 4.15 years |
| Semi-major axis | 2.58 au |
| Perihelion – aphelion | 2.21 – 2.96 au |
| Eccentricity | 0.146 |
| Inclination | 4.03° |
| Closest distance between its orbit and Earth's (MOID) | 1.22 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Hiroshi
- (4965) Takeda
- (5379) Abehiroshi
- (5830) Simohiro
- (6244) Okamoto
- (7250) Kinoshita
- (7254) Kuratani
- (7264) Hirohatanaka
- (8197) Mizunohiroshi
- (8543) Tsunemi
- (8707) Arakihiroshi
- (8891) Irokawa
- (8923) Yamakawa
All asteroids named after someone called Hiroshi
Also discovered on 16 September 1993
- (6923) Borzacchini
- (6980) Kyusakamoto
- (8040) Utsumikazuhiko
- (8194) Satake
- (10559) Yukihisa
- (10821) Kimuratakeshi
- (10822) Yasunori
- (10823) Sakaguchi
- (12357) Toyako
- (16644) Otemaedaigaku
- (19228) Uemuraikuo
- (27815) Katsuhito