390 Alma
Alma (minor planet designation: 390 Alma) is an asteroid from the intermediate asteroid belt, approximately 24 kilometers in diameter. It was Guillaume Bigourdan's only asteroid discovery. He discovered it on 24 March 1894 in Paris.
A three-dimensional model of 390 Alma based on its light curve | |
| Discovery | |
|---|---|
| Discovered by | Guillaume Bigourdan |
| Discovery date | 24 March 1894 |
| Designations | |
MPC designation | (390) Alma |
Named after | Alma River |
Alternative designations | 1894 BC; 1930 QW; 1950 BV; 1950 CH; 1953 YB; 1963 DF |
Minor planet category | Main belt (Eunomia family) |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 122.02 yr (44568 d) |
| Aphelion | 3.00211 AU (449.109 Gm) |
| Perihelion | 2.29906 AU (343.934 Gm) |
Semi-major axis | 2.65059 AU (396.523 Gm) |
| Eccentricity | 0.13262 |
Orbital period (sidereal) | 4.32 yr (1576.2 d) |
Mean anomaly | 136.953° |
Mean motion | 0° 13m 42.229s / day |
| Inclination | 12.1645° |
Longitude of ascending node | 305.223° |
| 190.194° | |
| Physical characteristics | |
| Dimensions | 23.74±1.4 km 24 km |
Mean density | ~2.7 g/cm3 |
Synodic rotation period | 3.74 h (0.156 d) 0.156 d |
| 0.2190±0.029 | |
| S-type asteroid | |
| 10.39 | |
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.