(257) Silesia
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Asteroid (257) Silesia |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 3.118 AU |
| eccentricity | 0.112 |
| Perihelion - aphelion | 2.768 AU - 3.468 AU |
| Inclination of the orbit plane | 3.6 ° |
| Length of the ascending node | 34.4 ° |
| Argument of the periapsis | 26.9 ° |
| Time of passage of the perihelion | August 3, 2010 |
| Sidereal period | 5 a 185 d |
| Mean orbital velocity | 16.8 km / s |
| Physical Properties | |
| Medium diameter | 73 km |
| Albedo | approx. 0.05 |
| Rotation period | 15 h 43 min |
| Absolute brightness | 9.47 likes |
| Spectral class | SMASSII: Ch |
| history | |
| Explorer | Johann Palisa |
| Date of discovery | April 5, 1886 |
| 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. | |
(257) Silesia is an asteroid of the outer main asteroid belt , which on April 5, 1886 by Johann Palisa at the observatory of Vienna was discovered.
Silesia is the Latin name for Silesia .
Silesia moves at a distance of 2.7452 ( perihelion ) to 3.4875 ( aphelion ) astronomical units around the sun in 5.5014 years . The orbit is inclined 3.6481 ° to the ecliptic , the orbital eccentricity is 0.1191.
Silesia has a mean diameter of around 73 kilometers. It has a dark carbon-rich surface with an albedo of 0.05.