(12221) Ogatakoan Main-belt Asteroid
Discovered on 14 November 1982 by Kosai, H., Hurukawa, K. at Kiso.
Born in Okayama prefecture, Ogata Koan (1810-1863) was a medical doctor with knowledge of European medicine in the late Edo period. During 20 years of teaching he educated 1000 young people at the Tekijyuku school, the spirit of which has been followed by the medical school at Osaka University.Naming citation (20030106/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Ogatakoan is today
Seen from above the solar system on 2026-10-14: Ogatakoan is 2.81 au from the Sun and 3.71 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12221 |
| Provisional designation | 1982 VS2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.30 km (#7,313 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.115 |
| Absolute magnitude (H) | 14.12 |
| Orbital period | 4.24 years |
| Semi-major axis | 2.62 au |
| Perihelion – aphelion | 2.39 – 2.84 au |
| Eccentricity | 0.0855 |
| Inclination | 1.98° |
| Closest distance between its orbit and Earth's (MOID) | 1.38 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 14 November 1982
- (3291) Dunlap
- (3320) Namba
- (3878) Jyoumon
- (4855) Tenpyou
- (4890) Shikanosima
- (7634) Shizutani-Kou
- (8144) Hiragagennai
- (11827) Wasyuzan
- (12682) Kawada
- (14338) Shibakoukan
- (14820) Aizuyaichi
- (14821) Motaeno