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.[1]
.png) A three-dimensional model of 390 Alma based on its light curve | |
| Discovery | |
|---|---|
| Discovered by | Guillaume Bigourdan |
| Discovery date | 24 March 1894 |
| Designations | |
| (390) Alma | |
Named after | Alma River |
| 1894 BC; 1930 QW; 1950 BV; 1950 CH; 1953 YB; 1963 DF | |
| Main belt (Eunomia family) | |
| Orbital characteristics[1] | |
| 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) |
| 2.65059 AU (396.523 Gm) | |
| Eccentricity | 0.13262 |
| 4.32 yr (1576.2 d) | |
| 136.953° | |
| 0° 13m 42.229s / day | |
| Inclination | 12.1645° |
| 305.223° | |
| 190.194° | |
| Physical characteristics | |
| Dimensions | 23.74±1.4 km[1] 24 km[2] |
Mean density | ~2.7 g/cm³[3] |
| 3.74 h (0.156 d)[1] 0.156 d[4] | |
| 0.2190±0.029 | |
| S-type asteroid | |
| 10.39 | |
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 23 June 2006.
- G. A. Krasinsky; et al. (2002). "Hidden Mass in the Asteroid Belt". Icarus. 158: 98. Bibcode:2002Icar..158...98K. doi:10.1006/icar.2002.6837.
- "PDS lightcurve data". Archived from the original on 14 June 2006.
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