(3133) Sendai Main-belt Asteroid
Discovered on 4 October 1907 by A. Kopff at Heidelberg.
Where Sendai is today
Seen from above the solar system on 2026-10-14: Sendai is 1.85 au from the Sun and 0.885 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3133 |
| Provisional designation | A907 TC |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.25 km (#7,371 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.298 |
| Rotation period | 5.75 hours |
| Absolute magnitude (H) | 12.91 |
| Orbital period | 3.22 years |
| Semi-major axis | 2.18 au |
| Perihelion – aphelion | 1.83 – 2.53 au |
| Eccentricity | 0.160 |
| Inclination | 6.56° |
| Closest distance between its orbit and Earth's (MOID) | 0.838 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.