931 Whittemora

931 Whittemora
Discovery
Discovered by	F. Gonnessiat
Discovery site	Algiers Obs.
Discovery date	19 March 1920
Designations
MPC designation	(931) Whittemora
Named after	Thomas Whittemore; (American archaeologist)
Alternative designations	A920 FB · 1920 GU; A904 HB · 1904 HB
Minor planet category	main-belt (outer); background;
Orbital characteristics
	Epoch 31 May 2020 (JD 2459000.5)
	Uncertainty parameter 0
Observation arc	115.71 yr (42,264 d)
Aphelion	3.9061 AU
Perihelion	2.4319 AU
Semi-major axis	3.1690 AU
Eccentricity	0.2326
Orbital period (sidereal)	5.64 yr (2,061 d)
Mean anomaly	340.57°
Mean motion	0° 10m 28.92s / day
Inclination	11.484°
Longitude of ascending node	111.00°
Argument of perihelion	315.45°
Physical characteristics
Mean diameter	45.27±3.4 km; 45.298±0.727 km; 48.98±1.01 km;
Synodic rotation period	19.199±0.005 h
Geometric albedo	0.148±0.007; 0.170±0.050; 0.1704±0.028;
Spectral type	Tholen = M; M0 (Barucci); B–V = 0.700±0.030; U–B = 0.218±0.029;
Absolute magnitude (H)	9.3

931 Whittemora (prov. designation: A920 FB or 1920 GU) is a metallic background asteroid, approximately 46 kilometers (29 miles) in diameter, located in the outer region of the asteroid belt. It was discovered by French astronomer François Gonnessiat at the Algiers Observatory in North Africa on 19 March 1920. The M-type asteroid has a rotation period of 19.2 hours. It was named after American archaeologist Thomas Whittemore (1871–1950).