74 Galatea
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Discovery | |
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Discovered by: | Ernst Wilhelm Tempel |
Discovery date: | August 29, 1862 |
Orbital characteristics | |
Epoch December 31, 2006 (JD 2454100.5) | |
Aphelion | 515.376 Gm (3.445 AU) |
Perihelion: | 315.937 Gm (2.112 AU) |
Semi-major axis: | 415.657 Gm (2.778 AU) |
Eccentricity: | 0.240 |
Orbital period: | 1691.658 d (4.63 a) |
Avg. orbital speed: | 17.61 km/s |
Mean anomaly: | 36.838° |
Inclination: | 4.075° |
Longitude of ascending node: | 197.313° |
Argument of perihelion: | 174.519° |
Physical characteristics | |
Dimensions: | 118.7 km |
Mass: | 1.8×1018 kg |
Mean density: | ? g/cm³ |
Equatorial surface gravity: | 0.0332 m/s² |
Escape velocity: | 0.0628 km/s |
Rotation period: | ? d |
Albedo: | 0.043 [1] |
Temperature: | ~167 K |
Spectral type: | ? |
Absolute magnitude: | 8.66 |
74 Galatea (gal'-a-tee'-a) is a large asteroid located between the orbits of Mars and Jupiter. Its surface is very dark in color. Galatea was found by a comet discoverer, Ernst Tempel on August 29, 1862 in Marseilles, France. It was his third asteroid discovery. It is named after one of the two Galateas in Greek mythology. A stellar occultation by Galatea happened on September 8, 1987. The name Galatea has also been given to one of Neptune's satellites.
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73 Klytia | 74 Galatea | 75 Eurydike
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Near-Earth asteroids · Main belt · Jupiter Trojans · Neptune Trojans · Comets · Kuiper belt · Oort cloud |