Nephele (minor planet designation: 431 Nephele) is a large Themistian asteroid. It is spectral C-type and is probably composed of carbonaceous material.
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 18 December 1897 |
| Designations | |
MPC designation | (431) Nephele |
| Pronunciation | /ˈnɛfəliː/[1] |
Named after | Nephele |
Alternative designations | 1897 DN |
Minor planet category | Main belt (Themis) |
| Adjectives | Nephelean /nɛfɪˈliːən/ |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 113.52 yr (41462 d) |
| Aphelion | 3.67837 AU (550.276 Gm) |
| Perihelion | 2.61178 AU (390.717 Gm) |
Semi-major axis | 3.14507 AU (470.496 Gm) |
| Eccentricity | 0.16957 |
Orbital period (sidereal) | 5.58 yr (2037.3 d) |
Mean anomaly | 230.611° |
Mean motion | 0° 10m 36.152s / day |
| Inclination | 1.82752° |
Longitude of ascending node | 117.229° |
Argument of perihelion | 216.161° |
| Physical characteristics | |
Mean diameter | 95.03±1.6 km |
Synodic rotation period | 18.821 h (0.7842 d) |
Geometric albedo | 0.0636±0.002 |
Spectral type | C |
Absolute magnitude (H) | 8.72 |
It was discovered by Auguste Charlois on 18 December 1897 in Nice.
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