(4809) Robert Ball
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Asteroid (4809) Robertball |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 2.5673 AU |
| eccentricity | 0.2489 |
| Perihelion - aphelion | 1.9283 AU - 3.2063 AU |
| Inclination of the orbit plane | 13.6766 ° |
| Length of the ascending node | 169.3126 ° |
| Argument of the periapsis | 173.3744 ° |
| Sidereal period | 4.11 a |
| Mean orbital velocity | 18.59 km / s |
| Physical Properties | |
| Absolute brightness | 12.8 mag |
| history | |
| Explorer | M. Wolf |
| Date of discovery | September 5, 1928 |
| Another name | 1928 RB , 1969 PS, 1988 CP 6 |
| 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. | |
(4809) Robertball is an asteroid of the main belt that was discovered on September 5, 1928 by the German astronomer Max Wolf at the State Observatory Heidelberg-Königstuhl ( IAU code 024) near Heidelberg .
The asteroid was named on November 26, 2004 after the Irish astronomer, mathematician and author of popular science books Robert Stawell Ball (1840-1913).
See also
Web links
- Asteroid Robertball: Discovery Circumstances according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics, Cambridge, USA
- (4809) Robertball in the Small-Body Database of the Jet Propulsion Laboratory .
- (4809) Robertball in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).