(1686) De Sitter
Asteroid (1686) De Sitter |
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Properties of the orbit ( animation ) | |
Orbit type | Main belt asteroid |
Asteroid family | Themis family |
Major semi-axis | 3.1567 AU |
eccentricity | 0.1667 |
Perihelion - aphelion | 2.6306 AU - 3.6829 AU |
Inclination of the orbit plane | 0.625 ° |
Sidereal period | 5.609 a |
Mean orbital velocity | 16.76 km / s |
Physical Properties | |
Medium diameter | 32.92 km |
Dimensions | ? | kg
Albedo | 0.065 |
Medium density | ? g / cm³ |
Rotation period | ? H |
Absolute brightness | 10,981 mag |
Spectral class | ? |
history | |
Explorer | H. van Gent |
Date of discovery | September 28, 1935 |
Another name | 1935 SR 1 , 2929 RK 1 , 1933 GF |
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. |
(1686) De Sitter is an asteroid of the main belt that was discovered on September 28, 1935 by the Dutch astronomer Hendrik van Gent in Johannesburg .
The asteroid was named after the Dutch astronomer Willem de Sitter .