76 Freia
From Wikipedia, the free encyclopedia
| Discovery | |
|---|---|
| Discovered by | Heinrich d'Arrest |
| Discovery date | October 21, 1862 |
| Designations | |
| Named after | Freyja |
| Alternative names | |
| Minor planet category | Outer main belt[1] (Cybele) |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 594.715 Gm (3.975 AU) |
| Perihelion | 427.898 Gm (2.860 AU) |
| Semi-major axis | 511.306 Gm (3.418 AU) |
| Eccentricity | 0.163 |
| Orbital period | 2307.979 d (6.32 a) |
| Average orbital speed | 16.00 km/s |
| Mean anomaly | 299.268° |
| Inclination | 2.116° |
| Longitude of ascending node | 204.535° |
| Argument of perihelion | 254.070° |
| Physical characteristics | |
| Dimensions | 183.7 km[1] |
| Mass | (1.97 ± 4.20) × 1018[2] kg |
| Mean density | 0.79 ± 1.69[2] g/cm3 |
| Equatorial surface gravity | 0.0513 m/s² |
| Escape velocity | 0.0971 km/s |
| Albedo | 0.036 [3] |
| Temperature | ~151 K |
| Spectral type | CP |
| Absolute magnitude (H) | 7.90 |
|
| |
76 Freia (/ˈfraɪ.ə/ FRY-ə) is a very large main-belt asteroid. It orbits in the outer part of the asteroid belt and is classified as a Cybele asteroid. Its composition is very primitive and it is extremely dark in color. Freia was discovered by the astronomer Heinrich d'Arrest on October 21, 1862, in Copenhagen, Denmark. It was his first and only asteroid discovery. It is named after the goddess Freyja in Norse mythology.
References
- ↑ 1.0 1.1 "JPL Small-Body Database Browser: 76 Freia". 2008-03-04 last obs. Retrieved 2010-09-05.
- ↑ 2.0 2.1 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- ↑ Asteroid Data Sets
| |||||
| ||||||||||||||||||||||
This article is issued from Wikipedia. The text is available under the Creative Commons Attribution/Share Alike; additional terms may apply for the media files.