(817) Annika
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Asteroid (817) Annika |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 2.591 AU |
| eccentricity | 0.18 |
| Perihelion - aphelion | 2.126 AU - 3.056 AU |
| Inclination of the orbit plane | 11.3 ° |
| Length of the ascending node | 125.7 ° |
| Argument of the periapsis | 284.4 ° |
| Time of passage of the perihelion | May 11, 2011 |
| Sidereal period | 4 a 62 d |
| Mean orbital velocity | 18.4 km / s |
| Physical Properties | |
| Medium diameter | approx. 22 km |
| Albedo | 0.17 |
| Rotation period | 10 h 34 min |
| Absolute brightness | 10.8 mag |
| history | |
| Explorer | Max Wolf |
| Date of discovery | February 6, 1916 |
| Another name | 1916 YW |
| 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. | |
(817) Annika is an asteroid of the main belt that was discovered on February 6, 1916 by the German astronomer Max Wolf in Heidelberg .
The origin of the name is unknown.