891 Gunhild

891 Gunhild
	Modelled shape of Gunhild from its lightcurve
Discovery
Discovered by	M. F. Wolf
Discovery site	Heidelberg Obs.
Discovery date	17 May 1918
Designations
MPC designation	(891) Gunhild
Named after	unknown
Alternative designations	A918 KB · 1977 FH; 1999 CF154 · A915 VE; 1918 DQ · 1915 VE
Minor planet category	main-belt · (outer); background
Orbital characteristics
	Epoch 31 May 2020 (JD 2459000.5)
	Uncertainty parameter 0
Observation arc	101.70 yr (37,145 d)
Aphelion	2.9444 AU
Perihelion	2.7799 AU
Semi-major axis	2.8622 AU
Eccentricity	0.0287
Orbital period (sidereal)	4.84 yr (1,769 d)
Mean anomaly	232.57°
Mean motion	0° 12m 12.6s / day
Inclination	13.559°
Longitude of ascending node	105.85°
Argument of perihelion	292.38°
Physical characteristics
Mean diameter	51.95±5.6 km; 55.747±0.321 km; 63.80±0.67 km;
Synodic rotation period	11.892±0.001 h
Geometric albedo	0.049±0.001; 0.057±0.019; 0.0718±0.018;
Spectral type	D (S3OS2-TH); T (S3OS2-BB); D (SDSS-MOC);
Absolute magnitude (H)	10.0

891 Gunhild (prov. designation: A918 KB or 1918 DQ) is a large background asteroid from the outer regions of the asteroid belt, that measures approximately 58 kilometers (36 miles) in diameter. It was discovered on 17 May 1918, by astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory in southwest Germany. The dark D-type asteroid has a rotation period of 11.9 hours. Any reference of the asteroid's name to a person is unknown.

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