(7105) Yousyozan Main-belt Asteroid
Discovered on 18 February 1977 by Kosai, H., Hurukawa, K. at Kiso.
Named for a 400-m mountain to the south of the Okayama station of the National Astronomical Observatory of Japan. Site testing for the observatory was conducted for about a year on this mountain, resulting in the observatory's construction. It was opened in 1960.Naming citation (19990202/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Yousyozan is today
Seen from above the solar system on 2026-10-14: Yousyozan is 2.69 au from the Sun and 3.42 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 7105 |
| Provisional designation | 1977 DB1 |
| Orbit class | Main-belt Asteroid |
| Rotation period | 3.18 hours |
| Absolute magnitude (H) | 14.68 |
| Orbital period | 3.74 years |
| Semi-major axis | 2.41 au |
| Perihelion – aphelion | 1.99 – 2.83 au |
| Eccentricity | 0.175 |
| Inclination | 2.95° |
| 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 18 February 1977
- (2330) Ontake
- (2924) Mitake-mura
- (2960) Ohtaki
- (3249) Musashino
- (3391) Sinon
- (3607) Naniwa
- (4186) Tamashima
- (4812) Hakuhou
- (4963) Kanroku
- (5017) Tenchi
- (5082) Nihonsyoki
- (7104) Manyousyu