Astronomy:390 Alma
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Short description: Main-belt asteroid
.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 | |
| Minor planet category | Main belt (Eunomia family) |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 122.02 yr (44568 d) |
| |{{{apsis}}}|helion}} | 3.00211 astronomical unit|AU (449.109 Gm) |
| |{{{apsis}}}|helion}} | 2.29906 AU (343.934 Gm) |
| 2.65059 AU (396.523 Gm) | |
| Eccentricity | 0.13262 |
| Orbital period | 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[1] 24 km[2] |
| Mean density | ~2.7 g/cm3[3] |
| Rotation period | 3.74 h (0.156 d)[1] 0.156 d[4] |
| Geometric albedo | 0.2190±0.029 |
| S-type asteroid | |
| Absolute magnitude (H) | 10.39 |
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]
References
- ↑ 1.0 1.1 1.2 1.3 "390 Alma (1894 BC)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=390;cad=1.
- ↑ "Supplemental IRAS Minor Planet Survey". Archived from the original on 2006-06-23. https://archive.today/20060623213811/http://www.psi.edu/pds/archive/astdata04/simps04/diamalb.tab.
- ↑ G. A. Krasinsky (2002). "Hidden Mass in the Asteroid Belt". Icarus 158 (1): 98. doi:10.1006/icar.2002.6837. Bibcode: 2002Icar..158...98K.
- ↑ "PDS lightcurve data". Archived from the original on 2006-06-14. https://archive.today/20060614093519/http://www.psi.edu/pds/archive/lc.html.
External links
- 390 Alma at AstDyS-2, Asteroids—Dynamic Site
- 390 Alma at the JPL Small-Body Database
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