(209) Dido Main-belt Asteroid
Discovered on 22 October 1879 by C. H. F. Peters at Clinton.
👶 Dido as a baby name🐶 Dido as a dog name
Where Dido is today
Seen from above the solar system on 2026-10-14: Dido is 3.22 au from the Sun and 3.72 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 209 |
| Provisional designation | A879 UC |
| Orbit class | Main-belt Asteroid |
| Diameter | 179 km (#45 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0280 |
| Rotation period | 5.74 hours |
| Spectral type | C |
| Absolute magnitude (H) | 8.3 |
| Orbital period | 5.60 years |
| Semi-major axis | 3.15 au |
| Perihelion – aphelion | 2.99 – 3.32 au |
| Eccentricity | 0.0520 |
| Inclination | 7.17° |
| Closest distance between its orbit and Earth's (MOID) | 1.99 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.