251 Sophia

251 Sophia
Discovery
Discovered by	Johann Palisa
Discovery date	4 October 1885
Designations
Alternative names	A907 UA, 1950 RH₁, 1953 FN₁
Minor planet category	Main belt
Orbital characteristics^[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	130.20 yr (47556 d)
Aphelion	3.40444 AU (509.297 Gm)
Perihelion	2.79047 AU (417.448 Gm)
Semi-major axis	3.09745 AU (463.372 Gm)
Eccentricity	0.099110
Orbital period	5.45 yr (1991.2 d)
Average orbital speed	16.94 km/s
Mean anomaly	299.994°
Mean motion	0° 10^m 50.876^s / day
Inclination	10.5103°
Longitude of ascending node	156.156°
Argument of perihelion	285.776°
Earth MOID	1.82811 AU (273.481 Gm)
Jupiter MOID	1.83362 AU (274.306 Gm)
Jupiter Tisserand parameter	3.190
Physical characteristics
Dimensions	7004284200000000000♠28.42±4.5 km
Mass	unknown
Mean density	unknown
Equatorial surface gravity	unknown
Equatorial escape velocity	unknown
Rotation period	20.216 h (0.8423 d)
Geometric albedo	6999218800000000000♠0.2188±0.091
Temperature	unknown
Spectral type	unknown
Absolute magnitude (H)	9.9

251 Sophia is a main belt asteroid.

It was discovered by Johann Palisa on October 4, 1885 in Vienna and was named after Sophia, wife of astronomer Hugo von Seeliger.

References

Minor planets navigator

250 Bettina 251 Sophia 252 Clementina

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