(20151) Utsunomiya Main-belt Asteroid
Discovered on 5 October 1996 by A. Nakamura at Kuma Kogen.
Syogo Utsunomiya (b. 1956) is a farmer and renowned amateur astronomer in Japan. During his 27-year visual search for comets, Utsunomiya discovered C/1997 T1 and C/2000 W1, and in 1995 he rediscovered 122P/de Vico. He is the first Japanese person to receive the Edgar Wilson Award.Naming citation (20010804/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Utsunomiya is today
Seen from above the solar system on 2026-10-14: Utsunomiya is 2.84 au from the Sun and 3.77 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20151 |
| Provisional designation | 1996 TO6 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.84 km (#15,586 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.105 |
| Absolute magnitude (H) | 15.9 |
| Orbital period | 3.55 years |
| Semi-major axis | 2.33 au |
| Perihelion – aphelion | 1.80 – 2.86 au |
| Eccentricity | 0.228 |
| Inclination | 11.6° |
| Closest distance between its orbit and Earth's (MOID) | 0.841 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 5 October 1996
- (8725) Keiko
- (13185) Agasthenes
- (19303) Chinacyo
- (19304) Yoshidaseiko
- (20150) Changshuhong
- (20158) Allton
- (21284) Pandion
- (35283) Bradtimerson
- (79333) Yusaku