(990) Yerkes
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Asteroid (990) Yerkes |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 2.6682 AU |
| eccentricity | 0.2164 |
| Perihelion - aphelion | 2.0908 AU - 3.2455 AU |
| Inclination of the orbit plane | 8.78 ° |
| Sidereal period | 4,358 a |
| Mean orbital velocity | 18.23 km / s |
| Physical Properties | |
| Medium diameter | 18.46 km |
| Albedo | 0.130 |
| Rotation period | ? H |
| Absolute brightness | 11,679 likes |
| Spectral class | ? |
| history | |
| Explorer | George Van Biesbroeck |
| Date of discovery | 1922 |
| Another name | 1922 MZ, 1961 UB 1 , A913 UA |
| 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. | |
(990) Yerkes is an asteroid of the main belt , which on 23 November 1922 by Belgian astronomer George Van Biesbroeck at Yerkes Observatory in Williams Bay , Wisconsin was discovered.
The name is derived from the Yerkes Observatory , where the asteroid was discovered.