(312) Pierretta Main-belt Asteroid
Discovered on 28 August 1891 by A. Charlois at Nice.
Where Pierretta is today
Seen from above the solar system on 2026-10-14: Pierretta is 3.02 au from the Sun and 2.10 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 312 |
| Provisional designation | A891 QA |
| Orbit class | Main-belt Asteroid |
| Diameter | 46.2 km (#826 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.230 |
| Rotation period | 10.3 hours |
| Spectral type | S |
| Absolute magnitude (H) | 8.95 |
| Orbital period | 4.64 years |
| Semi-major axis | 2.78 au |
| Perihelion – aphelion | 2.34 – 3.23 au |
| Eccentricity | 0.160 |
| Inclination | 9.04° |
| Closest distance between its orbit and Earth's (MOID) | 1.34 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
More named asteroids discovered by A. Charlois
- (267) Tirza
- (272) Antonia
- (277) Elvira
- (282) Clorinde
- (283) Emma
- (284) Amalia
- (285) Regina
- (289) Nenetta
- (293) Brasilia
- (294) Felicia
- (296) Phaetusa
- (297) Caecilia
← (311) Claudia · (313) Chaldaea →