(984) Gretia
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Asteroid (984) Gretia |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 2.8064 AU |
| eccentricity | 0.1950 |
| Perihelion - aphelion | 2.2592 AU - 3.3537 AU |
| Inclination of the orbit plane | 9.082 ° |
| Sidereal period | 4,702 a |
| Mean orbital velocity | 17.78 km / s |
| Physical Properties | |
| Medium diameter | 31.91 km |
| Albedo | 0.4239 |
| Rotation period | 5.781 h |
| Absolute brightness | 9,351 mag |
| Spectral class | ? |
| history | |
| Explorer | K. Reinmuth |
| Date of discovery | 1922 |
| Another name | 1922 MH, 1973 LC |
| 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. | |
(984) Gretia is an asteroid of the main belt , which on 27 August 1922 by the German astronomer Karl Wilhelm Reinmuth at Heidelberg State Observatory King chair of the University of Heidelberg was discovered.
The asteroid was named after the daughter-in-law of the German astronomer Albrecht Kahrstedt .