106 Dione
From Wikipedia, the free encyclopedia
|
Discovery
|
|
|---|---|
| Discovered by | James Craig Watson |
| Discovery date | October 10, 1868 |
|
Designations
|
|
| Alternative names | |
| Minor planet category |
Main belt |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 556.376 Gm (3.719 AU) |
| Perihelion | 391.585 Gm (2.618 AU) |
| Semi-major axis | 473.981 Gm (3.168 AU) |
| Eccentricity | 0.174 |
| Orbital period | 2059.923 d (5.64 a) |
| Average orbital speed | 16.61 km/s |
| Mean anomaly | 161.899° |
| Inclination | 4.616° |
| Longitude of ascending node | 62.400° |
| Argument of perihelion | 329.534° |
|
Physical characteristics
|
|
| Dimensions | 146.6 km |
| Mass | 3.3×1018 kg |
| Mean density | ? g/cm³ |
| Equatorial surface gravity | 0.0410 m/s² |
| Escape velocity | 0.0775 km/s |
| Rotation period | ? d |
| Albedo | ? |
| Temperature | ~156 K |
| Spectral type | G |
| Absolute magnitude | 7.41 |
106 Dione is a large main belt asteroid. It probably has a composition similar to 1 Ceres. It was discovered by J. C. Watson on October 10, 1868 and named after Dione, a Titan in Greek mythology. Dione occulted a dim star on January 19, 1983. A diameter of 147 km was observed, closely matching the value acquired by the IRAS satellite. One of Saturn's satellites is also named Dione.
|
|||||
