826 Henrika information

826 Henrika
Discovery
Discovered by	M. F. Wolf
Discovery site	Heidelberg Obs.
Discovery date	28 April 1916
Designations
MPC designation	(826) Henrika
Named after	unknown
Alternative designations	A916 HD · 1930 MG; 1934 HE · 1935 SW1; 1948 PJ1 · 1957 QC; 1962 UK · 1962 VC; 1916 ZO
Minor planet category	main-belt · (middle); background ;
Orbital characteristics
	Epoch 31 May 2020 (JD 2459000.5)
	Uncertainty parameter 0
Observation arc	103.52 yr (37,809 d)
Aphelion	3.2705 AU
Perihelion	2.1532 AU
Semi-major axis	2.7119 AU
Eccentricity	0.2060
Orbital period (sidereal)	4.47 yr (1,631 d)
Mean anomaly	51.962°
Mean motion	0° 13m 14.52s / day
Inclination	7.1048°
Longitude of ascending node	230.22°
Argument of perihelion	36.697°
Physical characteristics
Mean diameter	19.28±2.3 km; 21.83±0.43 km; 22.556±0.258 km;
Synodic rotation period	5.9846±0.0001 h
Geometric albedo	0.114±0.005; 0.1435±0.042; 0.166±0.025;
Spectral type	SMASS = C ; undefined (MOVIS);
Absolute magnitude (H)	11.6

826 Henrika (prov. designation: A916 HD or 1916 ZO) is a background asteroid from the central regions of the asteroid belt. It was discovered by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory on 28 April 1916.^[1] The carbonaceous C-type asteroid has a rotation period of 5.98 hours and measures approximately 21 kilometers (13 miles) in diameter. Any reference to the origin of the asteroid's name is unknown.^[2]

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