161 Athor

161 Athor

A three-dimensional model of 161 Athor based on its light curve.
Discovery
Discovered by	James Craig Watson
Discovery site	Detroit Observatory
Discovery date	April 19, 1876
Designations
MPC designation	161
Named after	Hathor
Minor planet category	Main belt
Orbital characteristics
Epoch November 30, 2008
Aphelion	2.7075 AU
Perihelion	2.0507 AU
Semi-major axis	2.3791 AU
Eccentricity	0.138031
Orbital period	1340.35 days (3.67 years)
Mean anomaly	317.519°
Inclination	9.054°
Longitude of ascending node	18.766°
Argument of perihelion	294.4°
Physical characteristics
Dimensions	44.19 kilometres (27.46 mi) ± 3.3 kilometres (2.1 mi) Mean diameter 47.0 kilometres (29.2 mi) ± 0.2 kilometres (0.12 mi) circular fit
Rotation period	7.281 ± 0.001 hours 7.288 ± 0.007 hours
Albedo	0.198 ± 0.033
Spectral type	M
Absolute magnitude (H)	9.15

161 Athor is an M-type Main belt asteroid that was discovered by James Craig Watson on April 19, 1876, at the Detroit Observatory and named after Hathor, an Egyptian fertility goddess. An occultation by Athor was observed, on October 15, 2002, resulting in an estimated diameter of 47.0 kilometres (29.2 mi).