(818) Kapteynia
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Asteroid (818) Kapteynia |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 3.167 AU |
| eccentricity | 0.096 |
| Perihelion - aphelion | 2.862 AU - 3.472 AU |
| Inclination of the orbit plane | 15.7 ° |
| Length of the ascending node | 70.8 ° |
| Argument of the periapsis | 293.5 ° |
| Time of passage of the perihelion | May 7, 2010 |
| Sidereal period | 5 a 233 d |
| Mean orbital velocity | 16.7 km / s |
| Physical Properties | |
| Medium diameter | approx. 49 km |
| Albedo | 0.17 |
| Rotation period | 16 h 21 min |
| Absolute brightness | 9.1 mag |
| history | |
| Explorer | Max Wolf |
| Date of discovery | February 21, 1916 |
| Another name | 1916 YZ, 1929 JC |
| 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. | |
(818) Kapteynia is an asteroid of the main belt , which was discovered on February 21, 1916 by the German astronomer Max Wolf in Heidelberg .
The asteroid was named after the Dutch astronomer Jacobus Kapteyn .