(2391) Tomita Main-belt Asteroid
Discovered on 9 January 1957 by K. Reinmuth at Heidelberg.
Where Tomita is today
Seen from above the solar system on 2026-10-14: Tomita is 2.65 au from the Sun and 3.60 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 2391 |
| Provisional designation | 1957 AA |
| Orbit class | Main-belt Asteroid |
| Diameter | 17.9 km (#2,505 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0700 |
| Rotation period | 7.95 hours |
| Absolute magnitude (H) | 12.81 |
| Orbital period | 3.81 years |
| Semi-major axis | 2.44 au |
| Perihelion – aphelion | 2.11 – 2.77 au |
| Eccentricity | 0.135 |
| Inclination | 3.02° |
| Closest distance between its orbit and Earth's (MOID) | 1.13 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.