(6669) Obi Main-belt Asteroid
Discovered on 5 May 1994 by Endate, K., Watanabe, K. at Kitami.
Named in honor of Shinya Obi (b. 1925), professor emeritus of the University of Tokyo. In addition to his numerous research papers, he has published many popular astronomy books. He has just retired as president of the University of the Air, which educates via communication satellites. Name proposed by the discoverers following a suggestion by A. Fujii and A. Abe.Naming citation (19980411/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
🐶 Obi as a dog name🐱 Obi as a cat name
Where Obi is today
Seen from above the solar system on 2026-10-14: Obi is 2.35 au from the Sun and 3.32 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 6669 |
| Provisional designation | 1994 JA1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.17 km (#8,687 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.321 |
| Spectral type | S |
| Absolute magnitude (H) | 13.39 |
| Orbital period | 3.27 years |
| Semi-major axis | 2.20 au |
| Perihelion – aphelion | 1.73 – 2.67 au |
| Eccentricity | 0.214 |
| Inclination | 6.21° |
| Closest distance between its orbit and Earth's (MOID) | 0.728 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.