Melpomene
18 Melpomene (A852 MA)
📋 A written introduction is coming — for now this page shows official values only.
Physical data
- Diameter
- 139.594 km
- Rotation period
- 11.57 hours
- Albedo
- 0.181
- Absolute magnitude H
- 6.35 mag
- Spectral type (Tholen)
- S
- Spectral type (SMASS)
- S
Orbit
- Orbit class (JPL)
- MBA — Main-belt Asteroid
- Semi-major axis
- 2.3 AU
- Eccentricity
- 0.218
- Inclination
- 10.1°
- Perihelion distance
- 1.8 AU
- Aphelion distance
- 2.8 AU
- Orbital period
- 1,270 days
- Perihelion passage
- JD 2461468.898
- Earth MOID
- 0.812 AU
Earth approach
- Potentially hazardous (PHA)
- No
- Near-Earth object (NEO)
- No
In everyday life
- About 140 km across — 34.9% of the 400 km Seoul–Busan expressway.
- One orbit takes about 1,270 Earth days (about 3.5 years).
- Sunlight needs about 19 minutes to reach it on average (semi-major axis 2.3 AU) — versus about 8 min 19 s to Earth.
Worked out from this object's official values.