257 Silesia
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Light curve-based 3D-model of 257 Silesia
|
|
| Discovery | |
|---|---|
| Discovered by | J. Palisa |
| Discovery site | Vienna Observatory |
| Discovery date | 5 April 1886 |
| Designations | |
| MPC designation | 257 Silesia |
|
Named after
|
Silesia (region) |
| 1929 DD · 1952 FL1 1952 HU |
|
| main-belt | |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 129.94 yr (47462 d) |
| Aphelion | 3.4669 AU (518.64 Gm) |
| Perihelion | 2.7711 AU (414.55 Gm) |
| 3.1190 AU (466.60 Gm) | |
| Eccentricity | 0.11154 |
| 5.51 yr (2012.0 d) | |
| 30.606° | |
| 0° 10m 44.148s / day | |
| Inclination | 3.6351° |
| 34.364° | |
| 27.605° | |
| Earth MOID | 1.78299 AU (266.732 Gm) |
| Jupiter MOID | 1.8503 AU (276.80 Gm) |
| Jupiter Tisserand parameter | 3.204 |
| Physical characteristics | |
| Dimensions | 72.66±2.2 km |
| 15.7095 h (0.65456 d) | |
| 0.0545±0.003 | |
|
B–V = 0.761 U–B = 0.384 SCTU (Tholen) Ch (SMASS) |
|
| 9.47 | |
257 Silesia is a large Main belt asteroid, about 73 kilometers in diameter. It was discovered by Johann Palisa on April 5, 1886 at Vienna Observatory, Austria.
It is named after Silesia, the province of the discoverer's birthplace (nowadays most of Silesia is in Poland, but Palisa's birthplace is in the small part of Silesia that is in the Czech Republic).
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