45 Eugenia
Asteroid with 2 moons / From Wikipedia, the free encyclopedia
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Eugenia (minor planet designation: 45 Eugenia) is a large asteroid of the asteroid belt. It is famed as one of the first asteroids to be found to have a moon orbiting it. It was also the second triple asteroid to be discovered, after 87 Sylvia.
Quick Facts Discovery, Discovered by ...
Discovery[1] | |
---|---|
Discovered by | H. Goldschmidt |
Discovery date | 27 June 1857 |
Designations | |
(45) Eugenia | |
Pronunciation | /juːˈdʒiːniə/[2] |
Named after | Empress Eugénie |
1941 BN | |
Main belt | |
Adjectives | Eugenian |
Orbital characteristics[3] | |
Epoch 26 November 2005 (JD 2453701.5) | |
Aphelion | 440.305 Gm (2.943 AU) |
Perihelion | 373.488 Gm (2.497 AU) |
406.897 Gm (2.720 AU) | |
Eccentricity | 0.082 |
1638.462 d (4.49 a) | |
45.254° | |
Inclination | 6.610° |
147.939° | |
85.137° | |
Known satellites | Petit-Prince S/2004 (45) 1 |
Physical characteristics | |
Dimensions | 232 × 193 × 161 km[4] 305 × 220 × 145 km[5][6] |
Mean radius | 94±1 km[7] 107.3±2.1 km[5] |
Mass | (5.8±0.1)×1018 kg[7] (5.69±0.1)×1018 kg[4] (5.8±0.2)×1018 kg[8][9][lower-alpha 1] |
Mean density | 1.66±0.07 g/cm3[7] 1.1±0.1 g/cm3[4] 1.1±0.3 g/cm3[9] |
Equatorial surface gravity | 0.017 m/s²[lower-alpha 2] |
Equatorial escape velocity | 0.071 km/s[lower-alpha 2] |
0.2375 d (5.699 h)[10] | |
117±10° | |
Pole ecliptic latitude | −30±10°[6] |
Pole ecliptic longitude | 124±10° |
0.065 (calculated)[7] 0.040±0.002[5] | |
F[11] | |
7.46[5] | |
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