(12277) Tajimasatonokai Main-belt Asteroid
Discovered on 17 November 1990 by T. Seki at Geisei.
Tajimasatonokai is an astronomy group which has long been engaged in popularizing astronomy by holding public viewing events and lectures around Toyooka city, Hyogo prefecture. Their activity often takes place at the nearby Tajima-kaigan beach, a famous tourist destination.Naming citation (MPC batch dated 2016-02-22), IAU / Minor Planet Center, via NASA/JPL
Where Tajimasatonokai is today
Seen from above the solar system on 2026-10-14: Tajimasatonokai is 2.71 au from the Sun and 3.67 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12277 |
| Provisional designation | 1990 WN2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.89 km (#9,100 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.322 |
| Rotation period | 9.99 hours |
| Absolute magnitude (H) | 13.49 |
| Orbital period | 4.33 years |
| Semi-major axis | 2.66 au |
| Perihelion – aphelion | 2.29 – 3.02 au |
| Eccentricity | 0.137 |
| Inclination | 14.6° |
| Closest distance between its orbit and Earth's (MOID) | 1.31 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.