(1990) Pilcher
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Asteroid (1990) Pilcher |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 2.1742 AU |
| eccentricity | 0.0512 |
| Perihelion - aphelion | 2.0628 AU - 2.2856 AU |
| Inclination of the orbit plane | 3.131 ° |
| Sidereal period | 3.206 a |
| Mean orbital velocity | 20.20 km / s |
| Physical Properties | |
| Medium diameter | approx. 7 km |
| Albedo | ? |
| Rotation period | ? H |
| Absolute brightness | 13.14 mag |
| Spectral class | S. |
| history | |
| Explorer | K. Reinmuth |
| Date of discovery | March 9, 1956 |
| Another name | 1956 EE, 1937 JL, 1940 FA |
| 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. | |
(1990) Pilcher is an asteroid of the main belt that was discovered on March 9, 1956 by the German astronomer Karl Wilhelm Reinmuth at the Heidelberg-Königstuhl State Observatory at the University of Heidelberg .
The asteroid is named after the American astronomer Frederick Pilcher .