(309) Fraternitas
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Asteroid (309) Fraternitas |
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| Properties of the orbit ( animation ) | |
| Orbit type | Middle main belt |
| Major semi-axis | 2,664 AU |
| eccentricity | 0.116 |
| Perihelion - aphelion | 2.355 AU - 2.973 AU |
| Inclination of the orbit plane | 3.7 ° |
| Length of the ascending node | 356.6 ° |
| Argument of the periapsis | 311.2 ° |
| Time of passage of the perihelion | December 10, 2009 |
| Sidereal period | 4 a 127 d |
| Mean orbital velocity | 18.2 km / s |
| Physical Properties | |
| Medium diameter | 45 km |
| Albedo | 0.0595 |
| Rotation period | 13 h 12 min |
| Absolute brightness | 10.4 mag |
| history | |
| Explorer | Johann Palisa |
| Date of discovery | April 6, 1891 |
| 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. | |
(309) Fraternitas is an asteroid of the main asteroid belt , which was discovered on April 6, 1891 by Johann Palisa at the observatory in Vienna .
Fraternitas moves at a distance of 2.3606 ( perihelion ) to 2.9688 ( aphelion ) astronomical units in 4.35 years around the sun . The orbit is 3.7219 ° inclined to the ecliptic , the orbital eccentricity is 0.1141.
Fraternitas has a diameter of 45 kilometers. It has a dark surface with an albedo of 0.060. It rotates around its own axis in 13 hours and 12 minutes.