(106) Dione Main-belt Asteroid
Discovered on 10 October 1868 by J. C. Watson at Ann Arbor.
Where Dione is today
Seen from above the solar system on 2026-10-14: Dione is 2.73 au from the Sun and 1.82 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 106 |
| Provisional designation | A868 TA |
| Orbit class | Main-belt Asteroid |
| Diameter | 208 km (#25 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0440 |
| Rotation period | 16.2 hours |
| Spectral type | G |
| Absolute magnitude (H) | 7.76 |
| Orbital period | 5.68 years |
| Semi-major axis | 3.18 au |
| Perihelion – aphelion | 2.68 – 3.69 au |
| Eccentricity | 0.159 |
| Inclination | 4.57° |
| Closest distance between its orbit and Earth's (MOID) | 1.68 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
More named asteroids discovered by J. C. Watson
- (79) Eurynome
- (93) Minerva
- (94) Aurora
- (100) Hekate
- (101) Helena
- (103) Hera
- (104) Klymene
- (105) Artemis
- (115) Thyra
- (119) Althaea
- (121) Hermione
- (128) Nemesis
← (105) Artemis · (107) Camilla →