76 Freia

76 Freia

A three-dimensional model of 76 Freia based on its light curve.
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±4 km[1]
Mass	(1.97 ± 4.20) × 10^18 kg[2]
Mean density	0.79 ± 1.69[2] g/cm^3
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. "JPL Small-Body Database Browser: 76 Freia" (2008-03-04 last obs). Retrieved 2010-09-05.
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

External links

• 76 Freia at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters