231 Vindobona

231 Vindobona

Discovery
Discovered by	Johann Palisa
Discovery date	September 10, 1882
Designations
Named after	Vienna
Alternative names	1962 UJ
Minor planet category	Main belt
Orbital characteristics
Epoch 30 January 2005 (JD 2453400.5)
Aphelion	3.379 AU
Perihelion	2.457 AU
Semi-major axis	2.918 AU
Eccentricity	0.158
Orbital period	1820.907 d (4.99 yr)
Average orbital speed	17.44 km/s
Mean anomaly	264.553°
Inclination	5.102°
Longitude of ascending node	350.928°
Argument of perihelion	267.314°
Physical characteristics
Dimensions	82.0 km
Rotation period	5.547 h
Albedo	0.055
Absolute magnitude (H)	9.2

231 Vindobona is a large Main belt asteroid. It was discovered by Austrian astronomer Johann Palisa on September 10, 1882. Vindobona is the Latin name for Vienna, Austria, the city where the discovery was made.

Its dark surface indicates a carbon-rich composition.

Photometric observations at the Organ Mesa Observatory in New Mexico during 2012 showed a rotation period of 14.245 ± 0.001 hours with a brightness variation of 0.20 ± 0.03 in magnitude. This is in agreement with previous results.

External links

• The Asteroid Orbital Elements Database
• Minor Planet Discovery Circumstances
• Asteroid Lightcurve Data File