Nephele
431 Nephele (A897 YB)
📋 A written introduction is coming — for now this page shows official values only.
Physical data
- Diameter
- 101.9 km
- Rotation period
- 13.53 hours
- Albedo
- 0.055
- Absolute magnitude H
- 9.08 mag
- Spectral type (Tholen)
- B
- Spectral type (SMASS)
- B
Orbit
- Orbit class (JPL)
- MBA — Main-belt Asteroid
- Semi-major axis
- 3.15 AU
- Eccentricity
- 0.173
- Inclination
- 1.83°
- Perihelion distance
- 2.6 AU
- Aphelion distance
- 3.69 AU
- Orbital period
- 2,040 days
- Perihelion passage
- JD 2460377.839
- Earth MOID
- 1.59 AU
Earth approach
- Potentially hazardous (PHA)
- No
- Near-Earth object (NEO)
- No
In everyday life
- About 102 km across — 25.5% of the 400 km Seoul–Busan expressway.
- One orbit takes about 2,040 Earth days (about 5.6 years).
- Sunlight needs about 26 minutes to reach it on average (semi-major axis 3.2 AU) — versus about 8 min 19 s to Earth.
Worked out from this object's official values.