| Minorplanet: | yes |
| Background: |
|
| 431 Nephele | |
| Discoverer: | Auguste Charlois |
| Discovered: | 18 December 1897 |
| Mpc Name: | (431) Nephele |
| Pronounced: | [1] |
| Adjective: | Nephelean |
| Alt Names: | 1897 DN |
| Named After: | Nephele |
| Mp Category: | Main belt (Themis) |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Semimajor: | 3.14507AU |
| Perihelion: | 2.61178AU |
| Aphelion: | 3.67837abbr=onNaNabbr=on |
| Eccentricity: | 0.16957 |
| Period: | 5.58 yr (2037.3 d) |
| Inclination: | 1.82752° |
| Asc Node: | 117.229° |
| Arg Peri: | 216.161° |
| Mean Anomaly: | 230.611° |
| Mean Diameter: | |
| Density: | 1.678 ± 0.935/0.54 g/cm |
| Rotation: | 18.821abbr=onNaNabbr=on |
| Spectral Type: | C |
| Abs Magnitude: | 9.12 |
| Mean Motion: | / day |
| Observation Arc: | 113.52 yr (41462 d) |
| Uncertainty: | 0 |
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 18 December 1897 in Nice.