(12127) Mamiya Main-belt Asteroid
Discovered on 9 September 1999 by K. Watanabe at Sapporo.
Rinzo Mamiya (1780-1844) was an explorer and surveyor of the northern area of Japan. In 1809, he reached the north Sakhalin and showed that Karafuto (Sakhalin) is an island separated by a narrow channel, now called the Mamiya strait.Naming citation (20010109/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Mamiya is today
Seen from above the solar system on 2026-10-14: Mamiya is 2.09 au from the Sun and 1.11 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12127 |
| Provisional designation | 1999 RD37 |
| Orbit class | Main-belt Asteroid |
| Diameter | 11.0 km (#4,561 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0480 |
| Rotation period | 7.87 hours |
| Absolute magnitude (H) | 13.84 |
| Orbital period | 3.84 years |
| Semi-major axis | 2.45 au |
| Perihelion – aphelion | 1.99 – 2.91 au |
| Eccentricity | 0.187 |
| Inclination | 3.56° |
| Closest distance between its orbit and Earth's (MOID) | 0.987 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 9 September 1999
- (12130) Mousa
- (12589) Davidanand
- (12590) Ballantine
- (12591) Bergey
- (12592) Brianchen
- (12593) Shashlov
- (12594) Sidorclare
- (12595) Amandashaw
- (12596) Shukla
- (12597) Williamdaniel
- (12598) Sierra
- (12599) Singhal