(8957) Koujounotsuki Main-belt Asteroid
Discovered on 22 March 1998 by T. Seki at Geisei.
Named for a song composed in 1901 by Rentaro Taki (1879-1903). In English, the song's title is “The Moon over the Ruins of a Castle”. The reference is specifically to Oka castle, symbol of Takeda City, in Oita Prefecture.Naming citation (19990728/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Koujounotsuki is today
Seen from above the solar system on 2026-10-14: Koujounotsuki is 2.59 au from the Sun and 2.71 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 8957 |
| Provisional designation | 1998 FM125 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.07 km (#12,572 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.265 |
| Rotation period | 87.2 hours |
| Absolute magnitude (H) | 14.18 |
| Orbital period | 3.41 years |
| Semi-major axis | 2.27 au |
| Perihelion – aphelion | 1.91 – 2.62 au |
| Eccentricity | 0.156 |
| Inclination | 3.07° |
| Closest distance between its orbit and Earth's (MOID) | 0.930 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 22 March 1998
- (9122) Hunten
- (11695) Mattei
- (11696) Capen
- (11704) Gorin
- (12079) Kaibab
- (12084) Unno
- (12496) Ekholm
- (13234) Natashaowen
- (15970) Robertbrownlee
- (17776) Troska
- (17822) Tonireland
- (20315) Dotson
More named asteroids discovered by T. Seki
- (2396) Kochi
- (2571) Geisei
- (2582) Harimaya-Bashi
- (2621) Goto
- (2835) Ryoma
- (2880) Nihondaira
- (2961) Katsurahama
- (3150) Tosa
- (3182) Shimanto
- (3262) Miune
- (3431) Nakano
- (3785) Kitami
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