944 Hidalgo information

944 Hidalgo
	Animation of 944 Hidalgo's movement over 5 minutes in 2003, taken by the Very Large Telescope.
Discovery
Discovered by	W. Baade
Discovery site	Bergedorf Obs.
Discovery date	31 October 1920
Designations
MPC designation	(944) Hidalgo
Pronunciation	/hɪˈdælɡoʊ/
Named after	Miguel Hidalgo y Costilla; (Mexican revolutionary)
Alternative designations	1920 HZ · A920 UB
Minor planet category	centaur · main-belt ; unusual
Symbol	(astrological)
Orbital characteristics
	Epoch 27 April 2019 (JD 2458600.5)
	Uncertainty parameter 0
Observation arc	97.97 yr (35,784 d)
Aphelion	9.5345 AU
Perihelion	1.9474 AU
Semi-major axis	5.7410 AU
Eccentricity	0.6608
Orbital period (sidereal)	13.76 yr (5,024 d)
Mean anomaly	13.078°
Mean motion	0° 4m 18.12s / day
Inclination	42.521°
Longitude of ascending node	21.420°
Argument of perihelion	56.651°
Jupiter MOID	0.3285 AU
TJupiter	2.0690
Physical characteristics
Mean diameter	52.45±3.60 km; 61.4±12.7 km
Synodic rotation period	10.063±0.0003 h
Geometric albedo	0.028; 0.042
Spectral type	Tholen = D
Absolute magnitude (H)	10.77

944 Hidalgo /hɪˈdælɡoʊ/ is a centaur and unusual object on an eccentric, cometary-like orbit between the asteroid belt and the outer Solar System, approximately 52 kilometers (32 miles) in diameter. Discovered by German astronomer Walter Baade in 1920, it is the first member of the dynamical class of centaurs ever to be discovered. The dark D-type object has a rotation period of 10.1 hours and likely an elongated shape.^[9] It was named after Mexican revolutionary Miguel Hidalgo y Costilla.^[3]

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[2] "hidalgo". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)

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