431 Nephele
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| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | December 18, 1897 |
| Designations | |
| Named after | Nephele |
| Alternative names | 1897 DN |
| Minor planet category | Main belt (Themis) |
| Orbital characteristics | |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 551.872 Gm (3.689 AU) |
| Perihelion | 387.107 Gm (2.588 AU) |
| Semi-major axis | 469.489 Gm (3.138 AU) |
| Eccentricity | 0.175 |
| Orbital period | 2030.677 d (5.56 a) |
| Average orbital speed | 16.81 km/s |
| Mean anomaly | 210.253° |
| Inclination | 1.827° |
| Longitude of ascending node | 117.417° |
| Argument of perihelion | 212.678° |
| Physical characteristics | |
| Dimensions | 95.0 km |
| Mass | unknown |
| Mean density | unknown |
| Equatorial surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | unknown |
| Albedo | unknown |
| Temperature | unknown |
| Spectral type | C |
| Absolute magnitude (H) | 8.72 |
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431 Nephele is a large Themistian asteroid. It is spectral C-type and is probably composed of carbonaceous material.
It was discovered by Auguste Charlois on December 18, 1897 in Nice.
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