81 Terpsichore
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| Discovery | |
|---|---|
| Discovered by: | Ernst Wilhelm Tempel |
| Discovery date: | September 30, 1864 |
| Alternative names: | |
| Minor planet category: | Main belt |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion distance: | 516.955 Gm (3.456 AU) |
| Perihelion distance: | 337.132 Gm (2.254 AU) |
| Semi-major axis: | 427.044 Gm (2.855 AU) |
| Eccentricity: | 0.211 |
| Orbital period: | 1761.647 d (4.82 a) |
| Avg. orbital speed: | 17.43 km/s |
| Mean anomaly: | 149.581° |
| Inclination: | 7.809° |
| Longitude of ascending node: | 1.497° |
| Argument of perihelion: | 50.234° |
| Physical characteristics | |
| Dimensions: | 119.1 km |
| Mass: | 1.8×1018 kg |
| Mean density: | ? g/cm³ |
| Equatorial surface gravity: | 0.0333 m/s² |
| Escape velocity: | 0.0630 km/s |
| Rotation period: | ? d |
| Albedo: | 0.051 [1] |
| Temperature: | ~165 K |
| Spectral type: | C |
| Absolute magnitude: | 8.48 |
81 Terpsichore (turp-sik'-a-ree) is a large and very dark main belt asteroid. It has most likely a very primitive carbonaceous composition. It was found by the prolific comet discoverer Ernst Tempel on September 30, 1864. It is named after Terpsichore, the Muse of dance in Greek mythology.
[edit] References
| Minor planets | ||
|---|---|---|
| Previous minor planet | 81 Terpsichore | Next minor planet |
| List of asteroids | ||
Vulcanoids · Near-Earth asteroids · Main belt · Jupiter Trojans · Centaurs · Damocloids · Comets · Trans-Neptunians (Kuiper belt • Scattered disc • Oort cloud)
For other objects and regions, see Asteroid groups and families, Binary asteroids, Asteroid moons and the Solar System.
For a complete listing, see List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names.
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