(31) Euphrosyne Main-belt Asteroid
Discovered on 1 September 1854 by J. Ferguson at Washington.
Where Euphrosyne is today
Seen from above the solar system on 2026-10-14: Euphrosyne is 3.80 au from the Sun and 3.96 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 31 |
| Provisional designation | A854 RA |
| Orbit class | Main-belt Asteroid |
| Diameter | 267 km (#10 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0530 |
| Rotation period | 5.53 hours |
| Spectral type | C |
| Absolute magnitude (H) | 6.83 |
| Orbital period | 5.62 years |
| Semi-major axis | 3.16 au |
| Perihelion – aphelion | 2.48 – 3.84 au |
| Eccentricity | 0.216 |
| Inclination | 26.3° |
| Closest distance between its orbit and Earth's (MOID) | 1.59 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
More named asteroids discovered by J. Ferguson
← (30) Urania · (32) Pomona →