(10400) Hakkaisan Main-belt Asteroid
Discovered on 1 November 1997 by T. Kobayashi at Oizumi.
Hakkaisan is a sacred mountain in Niigata prefecture, where religious training is carried out. The astronomical observatory of Nihon University has been located on the hillside since 1992.Naming citation (20031110/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Hakkaisan is today
Seen from above the solar system on 2026-10-14: Hakkaisan is 2.36 au from the Sun and 2.61 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10400 |
| Provisional designation | 1997 VX |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.08 km (#8,802 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.271 |
| Absolute magnitude (H) | 13.43 |
| Orbital period | 3.55 years |
| Semi-major axis | 2.33 au |
| Perihelion – aphelion | 2.00 – 2.65 au |
| Eccentricity | 0.140 |
| Inclination | 8.68° |
| Closest distance between its orbit and Earth's (MOID) | 1.00 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 1 November 1997
- (14555) Shinohara
- (14998) Ogosemachi
- (15921) Kintaikyo
- (15922) Masajisaito
- (26984) Fernand-Roland
- (27984) Herminefranz
- (33059) Matsuoka
- (44013) Iidetenmondai
- (46737) Anpanman
- (55875) Hirohatagaoka
- (192439) Cilek