(71) Niobe Main-belt Asteroid
Discovered on 13 August 1861 by R. Luther at Dusseldorf.
Where Niobe is today
Seen from above the solar system on 2026-10-14: Niobe is 3.12 au from the Sun and 2.24 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 71 |
| Provisional designation | A861 PA |
| Orbit class | Main-belt Asteroid |
| Diameter | 83.4 km (#346 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.305 |
| Rotation period | 35.9 hours |
| Spectral type | S |
| Absolute magnitude (H) | 7.23 |
| Orbital period | 4.57 years |
| Semi-major axis | 2.75 au |
| Perihelion – aphelion | 2.27 – 3.24 au |
| Eccentricity | 0.177 |
| Inclination | 23.2° |
| Closest distance between its orbit and Earth's (MOID) | 1.40 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
More named asteroids discovered by R. Luther
- (17) Thetis
- (26) Proserpina
- (28) Bellona
- (35) Leukothea
- (37) Fides
- (47) Aglaja
- (53) Kalypso
- (57) Mnemosyne
- (58) Concordia
- (68) Leto
- (78) Diana
- (82) Alkmene
← (70) Panopaea · (72) Feronia →