145 Adeona

145 Adeona

Discovery[1] and designation
Discovered by	Christian Heinrich Friedrich Peters
Discovery date	June 3, 1875
Designations
Named after	Adeona
Alternate name(s)
Minor planet category	Main belt
Orbital characteristics[2]
Epoch December 31, 2006 (JD 2454100.5)
Aphelion	457.677 Gm (3.059 AU)
Perihelion	341.958 Gm (2.286 AU)
Semi-major axis	399.817 Gm (2.673 AU)
Eccentricity	0.145
Orbital period	1595.888 d (4.37 a)
Average orbital speed	18.12 km/s
Mean anomaly	163.291°
Inclination	12.637°
Longitude of ascending node	77.454°
Argument of perihelion	44.899°
Proper orbital elements
Physical characteristics
Dimensions	151.1 km
Mass	3.6×1018 kg
Mean density	2.0 g/cm³
Equatorial surface gravity	0.0422 m/s²
Equatorial escape velocity	0.0799 km/s
Sidereal rotation period	? d
Axial tilt	?°
Pole ecliptic latitude	?
Pole ecliptic longitude	?
Geometric albedo	0.10
Temperature	~170 K
Spectral type	C
Absolute magnitude (H)	8.13

145 Adeona is a rather large main-belt asteroid. Its surface is very dark, and probably composed of primitive carbonaceous material.^{[citation needed]} The Adeona family of asteroids is named after it.

It was discovered by C. H. F. Peters on June 3, 1875, from the observatory at Hamilton College, Clinton, New York. Peters named it after Adeona, the Roman goddess of homecoming, because he had recently returned from a journey across the world to observe the transit of Venus. Peters also discovered 144 Vibilia on the same night.

Adeona has been observed to occult a star once, on July 9, 2002.^{[citation needed]}