81 Terpsichore
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Discovery
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| Discovered by | Ernst Wilhelm Tempel |
| Discovery date | September 30, 1864 |
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Designations
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| Minor planet category |
Main belt |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 516.955 Gm (3.456 AU) |
| Perihelion | 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) |
| Average orbital speed | 17.43 km/s |
| Mean anomaly | 149.581° |
| Inclination | 7.809° |
| Longitude of ascending node | 1.497° |
| Argument of perihelion | 50.234° |
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Physical characteristics
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| 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 (tərp-sik'-ə-ree, IPA: /tɚrpˈsɪkəri/) 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
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This article about a C-type asteroid native to the Main Belt is a stub. You can help Wikipedia by expanding it. |
