48 Doris
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Discovery
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| Discovered by | Hermann Mayer Salomon Goldschmidt |
| Discovery date | September 19, 1857 |
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Designations
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| Minor planet category |
Main belt |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 500.093 Gm (3.343 AU) |
| Perihelion | 430.463 Gm (2.877 AU) |
| Semi-major axis | 465.278 Gm (3.110 AU) |
| Eccentricity | 0.075 |
| Orbital period | 2003.453 d (5.49 a) |
| Average orbital speed | 16.87 km/s |
| Mean anomaly | 336.191° |
| Inclination | 6.554° |
| Longitude of ascending node | 183.754° |
| Argument of perihelion | 257.583° |
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Physical characteristics
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| Dimensions | 221.8 km |
| Mass | 1.1×1019 kg |
| Mean density | ? g/cm³ |
| Equatorial surface gravity | 0.0620 m/s² |
| Escape velocity | 0.1173 km/s |
| Rotation period | ? d |
| Albedo | 0.062 [1] |
| Temperature | ~158 K |
| Spectral type | C |
| Absolute magnitude | 6.90 |
48 Doris (IPA: /ˈdɔrɨs/, Greek Δωρις) is one of the largest main belt asteroids. Doris was discovered by H. Goldschmidt on September 19, 1857 and named after Doris, an Oceanid in Greek mythology.
[edit] References
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