77 Frigga

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77 Frigga
Discovery
Discovered by Christian Heinrich Friedrich Peters
Discovery date November 12, 1862
Designations
MPC designation (77) Frigga
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
Equatorial surface gravity
0.0193 m/s²
Equatorial escape velocity
0.0366 km/s
9.0 hr[1]
0.144[1][3]
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[edit]

  1. ^ a b c d "JPL Small-Body Database Browser: 77 Frigga" (2012-01-04 last obs). Jet Propulsion Laboratory. Retrieved 2012-01-27. 
  2. ^ a b Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336Freely accessible, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  3. ^ Asteroid Data Sets Archived 2010-01-17 at WebCite
  4. ^ "Radar-Detected Asteroids and Comets". NASA/JPL Asteroid Radar Research. Retrieved 2012-01-27. 

External links[edit]