977 Philippa

977 Philippa
Discovery
Discovered by	B. Jekhovsky
Discovery site	Algiers Obs.
Discovery date	6 April 1922
Designations
MPC designation	(977) Philippa
Named after	Philippe de Rothschild; (French financier)
Alternative designations	A922 GA · 1922 LV; A914 YA · 1914 YA; A919 XA · 1919 XA
Minor planet category	main-belt · (outer); background
Orbital characteristics
	Epoch 31 May 2020 (JD 2459000.5)
	Uncertainty parameter 0
Observation arc	105.05 yr (38,370 d)
Aphelion	3.1990 AU
Perihelion	3.0366 AU
Semi-major axis	3.1178 AU
Eccentricity	0.0260
Orbital period (sidereal)	5.51 yr (2,011 d)
Mean anomaly	355.29°
Mean motion	0° 10m 44.4s / day
Inclination	15.174°
Longitude of ascending node	75.739°
Argument of perihelion	72.694°
Physical characteristics
Mean diameter	65.471±0.237 km; 65.67±5.3 km; 65.92±0.94 km;
Synodic rotation period	15.405±0.005 h
Geometric albedo	0.051±0.005; 0.0555±0.010; 0.056±0.002;
Spectral type	Tholen = C; X (S3OS2); B–V = 0.712±0.010; U–B = 0.370±0.020;
Absolute magnitude (H)	9.9

977 Philippa (prov. designation: A922 GA or 1922 LV) is a large background asteroid from the outer regions of the asteroid belt, approximately 65 kilometers (40 miles) in diameter. It was discovered on 6 April 1922, by Russian–French astronomer Benjamin Jekhowsky at the Algiers Observatory in Northern Africa. The C-type asteroid is likely irregular in shape and has a rotation period of 15.4 hours. It was named after French financier Baron Philippe de Rothschild (1902–1988).