77 Frigga
| Discovery | |
|---|---|
| Discovered by | Christian Heinrich Friedrich Peters |
| Discovery date | November 12, 1862 |
| Designations | |
Named after | Frigg |
| Main belt | |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 452.196 Gm (3.023 AU) |
| Perihelion | 346.228 Gm (2.314 AU) |
| 399.212 Gm (2.669 AU) | |
| Eccentricity | 0.133 |
| 1592.266 d (4.36 a) | |
Average orbital speed | 18.15 km/s |
| 346.682° | |
| Inclination | 2.433° |
| 1.332° | |
| 61.419° | |
| Physical characteristics | |
| Dimensions | 69.2 km[1] |
| Mass | (1.74 ± 0.68) × 1018 kg[2] |
Mean density | 11.05 ± 4.34[2] g/cm3 |
| 0.0193 m/s² | |
| 0.0366 km/s | |
| 9.0 hr[1] | |
| Albedo | 0.144[1][3] |
| Temperature | ~170 K |
Spectral type | M |
| 8.52[1] | |
|
| |
77 Frigga (/ˈfrɪɡə/ FRIG-ə) is a large, M-type, possibly metallic main-belt asteroid. It was discovered by C. H. F. Peters on November 12, 1862. It is named after Frigg, the Norse goddess.
Frigga has been studied by radar.[4]
References
- 1 2 3 4 "JPL Small-Body Database Browser: 77 Frigga" (2012-01-04 last obs). Jet Propulsion Laboratory. Retrieved 2012-01-27.
- 1 2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336
, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1. - ↑ Asteroid Data Sets
- ↑ "Radar-Detected Asteroids and Comets". NASA/JPL Asteroid Radar Research. Retrieved 2012-01-27.
External links
- Orbital simulation from JPL (Java) / Ephemeris
- 77 Frigga at the JPL Small-Body Database
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