Dido
209 Dido (A879 UC)
📋 A written introduction is coming — for now this page shows official values only.
Physical data
- Diameter
- 179.008 km
- Rotation period
- 5.7366 hours
- Albedo
- 0.028
- Absolute magnitude H
- 8.3 mag
- Spectral type (Tholen)
- C
- Spectral type (SMASS)
- Xc
Orbit
- Orbit class (JPL)
- MBA — Main-belt Asteroid
- Semi-major axis
- 3.15 AU
- Eccentricity
- 0.052
- Inclination
- 7.17°
- Perihelion distance
- 2.99 AU
- Aphelion distance
- 3.32 AU
- Orbital period
- 2,050 days
- Perihelion passage
- JD 2461964.943
- Earth MOID
- 1.99 AU
Earth approach
- Potentially hazardous (PHA)
- No
- Near-Earth object (NEO)
- No
In everyday life
- About 179 km across — 44.8% of the 400 km Seoul–Busan expressway.
- One orbit takes about 2,050 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.