(343) Ostara Main-belt Asteroid
Discovered on 15 November 1892 by M. F. Wolf at Heidelberg.
Where Ostara is today
Seen from above the solar system on 2026-10-14: Ostara is 2.47 au from the Sun and 2.52 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 343 |
| Provisional designation | A892 VA |
| Orbit class | Main-belt Asteroid |
| Diameter | 18.2 km (#2,465 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0920 |
| Rotation period | 110 hours |
| Spectral type | CSGU |
| Absolute magnitude (H) | 11.69 |
| Orbital period | 3.75 years |
| Semi-major axis | 2.41 au |
| Perihelion – aphelion | 1.86 – 2.97 au |
| Eccentricity | 0.229 |
| Inclination | 3.26° |
| Closest distance between its orbit and Earth's (MOID) | 0.868 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.