(251) Sophia Main-belt Asteroid
Discovered on 4 October 1885 by J. Palisa at Vienna.
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Where Sophia is today
Seen from above the solar system on 2026-10-14: Sophia is 3.22 au from the Sun and 2.77 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 251 |
| Provisional designation | A885 TA |
| Orbit class | Main-belt Asteroid |
| Diameter | 27.5 km (#1,518 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.234 |
| Rotation period | 20.2 hours |
| Absolute magnitude (H) | 9.95 |
| Orbital period | 5.46 years |
| Semi-major axis | 3.10 au |
| Perihelion – aphelion | 2.81 – 3.39 au |
| Eccentricity | 0.0933 |
| Inclination | 10.5° |
| Closest distance between its orbit and Earth's (MOID) | 1.85 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.