(221) Eos Main-belt Asteroid
Discovered on 18 January 1882 by J. Palisa at Vienna.
Where Eos is today
Seen from above the solar system on 2026-10-14: Eos is 2.84 au from the Sun and 1.91 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 221 |
| Provisional designation | A882 BA |
| Orbit class | Main-belt Asteroid |
| Diameter | 95.5 km (#261 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.166 |
| Rotation period | 10.4 hours |
| Spectral type | S |
| Absolute magnitude (H) | 7.71 |
| Orbital period | 5.23 years |
| Semi-major axis | 3.01 au |
| Perihelion – aphelion | 2.71 – 3.32 au |
| Eccentricity | 0.101 |
| Inclination | 10.9° |
| Closest distance between its orbit and Earth's (MOID) | 1.70 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
More named asteroids discovered by J. Palisa
- (136) Austria
- (137) Meliboea
- (140) Siwa
- (142) Polana
- (143) Adria
- (151) Abundantia
- (153) Hilda
- (155) Scylla
- (156) Xanthippe
- (178) Belisana
- (182) Elsa
- (183) Istria
← (220) Stephania · (222) Lucia →