93 Minerva
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Discovery
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| Discovered by | James Craig Watson |
| Discovery date | August 24, 1867 |
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Designations
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| Minor planet category |
Main belt |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 470.348 Gm (3.144 AU) |
| Perihelion | 353.703 Gm (2.364 AU) |
| Semi-major axis | 412.026 Gm (2.754 AU) |
| Eccentricity | 0.142 |
| Orbital period | 1669.541 d (4.57 a) |
| Average orbital speed | 17.86 km/s |
| Mean anomaly | 226.139° |
| Inclination | 8.557° |
| Longitude of ascending node | 4.148° |
| Argument of perihelion | 275.747° |
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Physical characteristics
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| Dimensions | 141.0 km |
| Mass | 2.9×1018 kg |
| Mean density | ? g/cm³ |
| Equatorial surface gravity | 0.0394 m/s² |
| Escape velocity | 0.0745 km/s |
| Rotation period | ? d |
| Albedo | 0.088 [1] |
| Temperature | ~168 K |
| Spectral type | C |
| Absolute magnitude | 7.7 |
93 Minerva (mi-nerr'-və, IPA: /mɨˈnɝvə/) is a large main belt asteroid. It is a C-type asteroid, meaning that it has a dark surface and possibly a primitive carbonaceous composition. It was discovered by J. C. Watson on August 24, 1867 and named after Minerva, the Roman equivalent of Athena, goddess of wisdom. An occultation of a star by Minerva was observed in France, Spain and the United States on November 22, 1982. An occultation diameter of ~170 km was measured from the observations. Since then two more occultations have been observed, which give an estimated mean diameter of ~150 km for diameter.[2]
[edit] References
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