Diana
78 Diana (A863 EA)
📋 A written introduction is coming — for now this page shows official values only.
Physical data
- Diameter
- 120.6 km
- Rotation period
- 7.2991 hours
- Albedo
- 0.0706
- Absolute magnitude H
- 8.39 mag
- Spectral type (Tholen)
- C
- Spectral type (SMASS)
- Ch
Orbit
- Orbit class (JPL)
- MBA — Main-belt Asteroid
- Semi-major axis
- 2.62 AU
- Eccentricity
- 0.204
- Inclination
- 8.68°
- Perihelion distance
- 2.09 AU
- Aphelion distance
- 3.16 AU
- Orbital period
- 1,550 days
- Perihelion passage
- JD 2461883.806
- Earth MOID
- 1.11 AU
Earth approach
- Potentially hazardous (PHA)
- No
- Near-Earth object (NEO)
- No
In everyday life
- About 121 km across — 30.2% of the 400 km Seoul–Busan expressway.
- One orbit takes about 1,550 Earth days (about 4.2 years).
- Sunlight needs about 22 minutes to reach it on average (semi-major axis 2.6 AU) — versus about 8 min 19 s to Earth.
Worked out from this object's official values.