(31105) Oguniyamagata Main-belt Asteroid
Discovered on 27 July 1997 by T. Okuni at Nanyo.
Oguni town, situated in the southwestern part of Yamagata prefecture Japan, has a population of 8900 and is surrounded by the Asahi and Iide mountain ranges of the Bandai-Asahi National Park.Naming citation (20121029/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Oguniyamagata is today
Seen from above the solar system on 2026-10-14: Oguniyamagata is 2.29 au from the Sun and 2.59 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 31105 |
| Provisional designation | 1997 OW2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.52 km (#13,912 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.331 |
| Rotation period | 5.91 hours |
| Absolute magnitude (H) | 14.62 |
| Orbital period | 3.28 years |
| Semi-major axis | 2.21 au |
| Perihelion – aphelion | 1.91 – 2.50 au |
| Eccentricity | 0.135 |
| Inclination | 5.53° |
| Closest distance between its orbit and Earth's (MOID) | 0.922 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.