31 Euphrosyne
| Orbital characteristics 1 | |
|---|---|
| Orbit type | Main belt |
| Semimajor axis | 3.149 AU |
| Perihelion distance | 2.436 AU |
| Aphelion distance | 3.862 AU |
| Orbital period | 5.59 years |
| Inclination | 26.32° |
| Eccentricity | 0.226 |
| Physical characteristics 1 | |
| Diameter | 255.9 km |
| Rotation period 3 | 5.531 hours |
| Abs. magnitude | 6.74 |
| History 2 | |
| Discoverer | J. Ferguson, 1854 |
31 Euphrosyne (ew-fros'-i-nee or ew-froz'-i-nee) is one of the largest main belt asteroids.
Euphrosyne was discovered by James Ferguson on September 1, 1854. It was the first asteroid found from North America. It is named after Euphrosyne, one of the Charites in Greek mythology.
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