77 Frigga

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)
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) 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. 1 2 3 4 "JPL Small-Body Database Browser: 77 Frigga" (2012-01-04 last obs). Jet Propulsion Laboratory. Retrieved 2012-01-27.
    2. 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.
    3. Asteroid Data Sets
    4. "Radar-Detected Asteroids and Comets". NASA/JPL Asteroid Radar Research. Retrieved 2012-01-27.

    External links


    This article is issued from Wikipedia - version of the Thursday, May 05, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.