124 Alkeste
From Wikipedia, the free encyclopedia
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Discovery
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| Discovered by | Christian Heinrich Friedrich Peters |
| Discovery date | August 23, 1872 |
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Designations
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| Minor planet category |
Main belt |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 423.558 Gm (2.831 AU) |
| Perihelion | 363.297 Gm (2.428 AU) |
| Semi-major axis | 393.427 Gm (2.630 AU) |
| Eccentricity | 0.077 |
| Orbital period | 1557.784 d (4.26 a) |
| Average orbital speed | 18.34 km/s |
| Mean anomaly | 253.158° |
| Inclination | 2.951° |
| Longitude of ascending node | 188.184° |
| Argument of perihelion | 63.214° |
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Physical characteristics
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| Dimensions | 76.4 km |
| Mass | 4.7×1017 kg |
| Mean density | ? g/cm³ |
| Equatorial surface gravity | 0.0214 m/s² |
| Escape velocity | 0.0404 km/s |
| Rotation period | ? d |
| Albedo | ? |
| Temperature | ~172 K |
| Spectral type | S |
| Absolute magnitude | 8.11 |
124 Alkeste is a large Main belt asteroid. It is an S-type. C.H.F. Peters discovered the asteroid on August 23, 1872, and named it after Alcestis, a woman in Greek mythology. Only one stellar occultation by Alkeste has been observed. It passed over the third magnitude star Beta Virginis on June 24, 2003. The event was observed from Australia and New Zealand.
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