(909) Ulla
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Asteroid (909) Ulla |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Asteroid family | Ulla family |
| Major semi-axis | 3.5394 AU |
| eccentricity | 0.1000 |
| Perihelion - aphelion | 3.1854 AU - 3.8935 AU |
| Inclination of the orbit plane | 18.754 ° |
| Sidereal period | 6,659 a |
| Mean orbital velocity | 15.83 km / s |
| Physical Properties | |
| Medium diameter | 116.44 km |
| Albedo | 0.0343 |
| Rotation period | 8.71 h |
| Absolute brightness | 8,543 likes |
| Spectral class | S. |
| history | |
| Explorer | Karl Wilhelm Reinmuth |
| Date of discovery | 1919 |
| Another name | 1919 FA, 1966 DM |
| 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. | |
(909) Ulla is an asteroid of the main belt that was discovered on February 7, 1919 by the German astronomer Karl Wilhelm Reinmuth in Heidelberg .
The asteroid was named after the daughter of a friend of the discoverer.