| Minorplanet | yes |
|---|---|
| Background |
|
| Discoverer | Guillaume Bigourdan |
| Discovered | 24 March 1894 |
| Mpc name | (390) Alma |
| Alt names | 1894 BC; 1930 QW; 1950 BV; 1950 CH; 1953 YB; 1963 DF |
| Named after | Alma River |
| Mp category | Main belt (Eunomia family) |
| Epoch | 31 July 2016 (JD 2457600.5) |
| Semimajor | 2.65059 AU (396.523 Gm) |
| Perihelion | 2.29906 AU (343.934 Gm) |
| Aphelion | 3.00211 AU (449.109 Gm) |
| Eccentricity | 0.13262 |
| Period | 4.32 yr (1576.2 d) |
| Inclination | 12.1645° |
| Asc node | 305.223° |
| Arg peri | 190.194° |
| Mean anomaly | 136.953° |
| Dimensions | 23.74 ± 1.4 km[1] 24 km[2] |
| Density | ~2.7 g/cm3[3] |
| Rotation | 3.74 h[1] 0.156 d[4] |
| Abs magnitude | 10.39 |
| Albedo | 0.2190 ± 0.029 |
| Mean motion | / day |
| Observation arc | 122.02 yr (44568 d) |
| Uncertainty | 0 |
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.[1]
References
- ^ "390 Alma (1894 BC)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 10 May 2016.
- ^ "Supplemental IRAS Minor Planet Survey". Archived from the original on 2006-06-23.
- ^ G. A. Krasinsky et al. (2002). "Hidden Mass in the Asteroid Belt". Icarus. 158 (1): 98. Bibcode:2002Icar..158...98K. doi:10.1006/icar.2002.6837
- ^ "PDS lightcurve data". Archived from the original on 2006-06-14.