(20461) Dioretsa
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Asteroid (20461) Dioretsa |
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|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | Centaurs / Damocloids |
| Major semi-axis | 23.903 AU |
| eccentricity | 0.8995 |
| Perihelion - aphelion | 2.402 AU - 45.404 AU |
| Inclination of the orbit plane | 160.428 ° |
| Sidereal period | 116.87 a |
| Physical Properties | |
| Medium diameter | 14 km |
| Albedo | 0.03 |
| Absolute brightness | 13.8 mag |
| history | |
| Explorer | LINEAR |
| Date of discovery | June 8, 1999 |
| Another name | 1999 LD 31 |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(20461) Dioretsa is an approximately 14 km large asteroid belonging to the group of centaurs and damocloids . It was discovered in 1999. Its orbit has a high eccentricity of 0.8995 and has a retrograde orbit with an inclination of 160.428 ° .
The name corresponds to the word "asteroid" spelled backwards to illustrate the fact that it is the first known asteroid with retrograde orbit.
The orbit of (20461) Dioretsa is also similar to the orbit of a comet, reaching 2.4 AU when it is close to the Sun and 45.2 AU when it is distant. This leads to the assumption that the asteroid originally came from the Oort cloud .
See also
Individual evidence
- ^ Johnson's Archives: List of Known Trans-Neptunian Objects
- ^ Damocloids, an extraordinary family of asteroids