(133) Cyrene Main-belt Asteroid
Discovered on 16 August 1873 by J. C. Watson at Ann Arbor.
Where Cyrene is today
Seen from above the solar system on 2026-10-14: Cyrene is 3.07 au from the Sun and 3.82 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 133 |
| Provisional designation | A873 QA |
| Orbit class | Main-belt Asteroid |
| Diameter | 72.2 km (#447 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.279 |
| Rotation period | 12.7 hours |
| Spectral type | SR |
| Absolute magnitude (H) | 8.04 |
| Orbital period | 5.39 years |
| Semi-major axis | 3.07 au |
| Perihelion – aphelion | 2.67 – 3.47 au |
| Eccentricity | 0.130 |
| Inclination | 7.24° |
| Closest distance between its orbit and Earth's (MOID) | 1.67 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
More named asteroids discovered by J. C. Watson
- (79) Eurynome
- (93) Minerva
- (94) Aurora
- (100) Hekate
- (101) Helena
- (103) Hera
- (104) Klymene
- (105) Artemis
- (106) Dione
- (115) Thyra
- (119) Althaea
- (121) Hermione
← (132) Aethra · (134) Sophrosyne →