777 Gutemberga

777 Gutemberga
Discovery
Discovered by	F. Kaiser
Discovery site	Heidelberg Obs.
Discovery date	24 January 1914
Designations
MPC designation	(777) Gutemberga
Named after	Johannes Gutenberg; (German inventor)
Alternative designations	A914 BF · 1926 EF; A924 YB · 1914 TZ
Minor planet category	main-belt · (outer); background;
Orbital characteristics
	Epoch 31 May 2020 (JD 2459000.5)
	Uncertainty parameter 0
Observation arc	105.60 yr (38,570 d)
Aphelion	3.5831 AU
Perihelion	2.8745 AU
Semi-major axis	3.2288 AU
Eccentricity	0.1097
Orbital period (sidereal)	5.80 yr (2,119 d)
Mean anomaly	79.152°
Mean motion	0° 10m 11.64s / day
Inclination	12.942°
Longitude of ascending node	283.27°
Argument of perihelion	264.44°
Physical characteristics
Dimensions	66.0 km × 66.0 km
Mean diameter	65.37±1.03 km; 65.57±1.9 km; 71.749±0.095 km;
Synodic rotation period	12.838±0.006 h
Geometric albedo	0.042±0.006; 0.0494±0.003; 0.050±0.002;
Spectral type	C (S3OS2-TH); Cb (S3OS2-BB);
Absolute magnitude (H)	9.80

777 Gutemberga (prov. designation: A914 BF or 1914 TZ) is a dark and large background asteroid, approximately 66 kilometers (41 miles) in diameter, from the outer regions of the asteroid belt. It was discovered by German astronomer Franz Kaiser at the Heidelberg-Königstuhl State Observatory on 24 January 1914. The carbonaceous C-type asteroid (Cb) has a rotation period of 12.8 hours. It was named after Johannes Gutenberg (ca. 1400–1468), who introduced the printing press to Europe and started the Printing Revolution.