(989) Schwassmannia
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Asteroid (989) Schwassmannia |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 2.6576 AU |
| eccentricity | 0.2528 |
| Perihelion - aphelion | 1.9858 AU - 3.3293 AU |
| Inclination of the orbit plane | 14.727 ° |
| Sidereal period | 4,332 a |
| Mean orbital velocity | 18.27 km / s |
| Physical Properties | |
| Medium diameter | 12.86 km |
| Albedo | 0.204 |
| Rotation period | ? H |
| Absolute brightness | 11,833 mag |
| Spectral class | ? |
| history | |
| Explorer | A. Schwassmann |
| Date of discovery | 1922 |
| Another name | 1922 MW, 1935 UE, 1935 UF |
| 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. | |
(989) Schwassmannia is an asteroid of the main belt that was discovered on November 18, 1922 by the German astronomer F. K. Arnold Schwassmann in Bergedorf .
The asteroid is named after its discoverer.