(23649) Tohoku Main-belt Asteroid
Discovered on 1 February 1997 by N. Sato at Chichibu.
Tohoku is the name of the northeastern part of Honshu island, Japan. The Great East Japan Earthquake of 2011 March 11 occurred offshore. About 25000 lives were lost and many facilities were demolished.Naming citation (20110615/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Tohoku is today
Seen from above the solar system on 2026-10-14: Tohoku is 2.30 au from the Sun and 3.06 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 23649 |
| Provisional designation | 1997 CJ5 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.77 |
| Orbital period | 3.69 years |
| Semi-major axis | 2.39 au |
| Perihelion – aphelion | 2.03 – 2.75 au |
| Eccentricity | 0.151 |
| Inclination | 0.434° |
| Closest distance between its orbit and Earth's (MOID) | 1.02 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 1 February 1997
- (8424) Toshitsumita
- (8945) Cavaradossi
- (8946) Yoshimitsu
- (9233) Itagijun
- (9432) Iba
- (12035) Ruggieri
- (13196) Rogerssmith
- (15376) Martak
- (23648) Kolar