Terpsichore
81 Terpsichore (A864 SA)
📋 A written introduction is coming — for now this page shows official values only.
Physical data
- Diameter
- 117.727 km
- Rotation period
- 10.943 hours
- Albedo
- 0.045
- Absolute magnitude H
- 8.66 mag
- Spectral type (Tholen)
- C
- Spectral type (SMASS)
- Cb
Orbit
- Orbit class (JPL)
- MBA — Main-belt Asteroid
- Semi-major axis
- 2.85 AU
- Eccentricity
- 0.212
- Inclination
- 7.8°
- Perihelion distance
- 2.25 AU
- Aphelion distance
- 3.46 AU
- Orbital period
- 1,760 days
- Perihelion passage
- JD 2460420.590
- Earth MOID
- 1.27 AU
Earth approach
- Potentially hazardous (PHA)
- No
- Near-Earth object (NEO)
- No
In everyday life
- About 118 km across — 29.4% of the 400 km Seoul–Busan expressway.
- One orbit takes about 1,760 Earth days (about 4.8 years).
- Sunlight needs about 24 minutes to reach it on average (semi-major axis 2.9 AU) — versus about 8 min 19 s to Earth.
Worked out from this object's official values.