Pierretta (minor planet designation: 312 Pierretta) (A891 QA) is a 46 km main-belt asteroid discovered on 28 Aug 1891 by Auguste Charlois at Nice.[2]
A three-dimensional model of 312 Pierretta based on its light curve | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery site | Nice Observatory |
| Discovery date | 28 August 1891 |
| Designations | |
MPC designation | (312) Pierretta |
| Pronunciation | /piəˈrɛtə/[1] |
Alternative designations | A891 QA |
Minor planet category | Main belt |
| Orbital characteristics[2] | |
| Epoch 31 May 2020 (JD 2459000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 128.66 yr (46994 d) |
| Aphelion | 3.227 AU (482.8 Gm) |
| Perihelion | 2.338 AU (349.8 Gm) |
Semi-major axis | 2.782 AU (416.2 Gm) |
| Eccentricity | 0.15982 |
Orbital period (sidereal) | 4.64 yr (1695.1 d) |
Mean anomaly | 339.6932° |
Mean motion | 0° 12m 44.554s / day |
| Inclination | 9.029344° |
Longitude of ascending node | 6.25477° |
Argument of perihelion | 262.764° |
| Physical characteristics | |
| Dimensions | 49.96±1.5 km |
Synodic rotation period | 10.282 h (0.4284 d) |
Geometric albedo | 0.1967±0.013 |
Spectral type | S/Sk |
Absolute magnitude (H) | 8.89 |
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