(1009) siren
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Asteroid (1009) siren |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 2.6234 AU |
| eccentricity | 0.4582 |
| Perihelion - aphelion | 1.4214 AU - 3.8255 AU |
| Inclination of the orbit plane | 15.837 ° |
| Sidereal period | 4,249 a |
| Mean orbital velocity | 18.39 km / s |
| Physical Properties | |
| Medium diameter | ? km |
| Albedo | ? |
| Rotation period | ? H |
| Absolute brightness | 13.9 likes |
| Spectral class | ? |
| history | |
| Explorer | K. Reinmuth |
| Date of discovery | October 31, 1923 |
| Another name | 1923 PE |
| 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. | |
(1009) Sirene is an asteroid of the main belt that was discovered on October 31, 1923 by the German astronomer Karl Wilhelm Reinmuth , who worked at the observatory on the Königstuhl near Heidelberg .
The asteroid is named after the mythological figures of the sirens .