Astronomy:257 Silesia
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Short description: Asteroid
_Silesia.png) Modelled shape of Silesia from its lightcurve | |
| Discovery [1] | |
|---|---|
| Discovered by | J. Palisa |
| Discovery site | Vienna Observatory |
| Discovery date | 5 April 1886 |
| Designations | |
| (257) Silesia | |
| Pronunciation | /saɪˈliːʃiə/[3][4] |
| Named after | Silesia (region) [2] |
| A886 GB, 1929 DD 1952 FL1, 1952 HU | |
| Minor planet category | main-belt |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 129.94 yr (47462 d) |
| |{{{apsis}}}|helion}} | 3.4669 astronomical unit|AU (518.64 Gm) |
| |{{{apsis}}}|helion}} | 2.7711 AU (414.55 Gm) |
| 3.1190 AU (466.60 Gm) | |
| Eccentricity | 0.11154 |
| Orbital period | 5.51 yr (2012.0 d) |
| Mean anomaly | 30.606° |
| Mean motion | 0° 10m 44.148s / day |
| Inclination | 3.6351° |
| Longitude of ascending node | 34.364° |
| 27.605° | |
| Earth MOID | 1.78299 AU (266.732 Gm) |
| Jupiter MOID | 1.8503 AU (276.80 Gm) |
| TJupiter | 3.204 |
| Physical characteristics | |
| Dimensions | 72.66±2.2 km |
| Rotation period | 15.7095 h (0.65456 d) |
| Geometric albedo | 0.0545±0.003 |
| B–V = 0.761 U–B = 0.384 SCTU (Tholen) Ch (SMASS) | |
| Absolute magnitude (H) | 9.47 |
Silesia (minor planet designation: 257 Silesia) is a large Main belt asteroid, about 73 kilometers in diameter. It was discovered by Johann Palisa on 5 April 1886 at Vienna Observatory, Austria.
.png)
Light curve-based 3D-model of Silesia
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).[2]
References
- ↑ 1.0 1.1 "JPL Small-Body Database Browser: 257 Silesia". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2000257. Retrieved 11 May 2016.
- ↑ 2.0 2.1 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (257) Silesia. Springer Berlin Heidelberg. p. 38. doi:10.1007/978-3-540-29925-7_258. ISBN 978-3-540-00238-3.
- ↑ Silesia (3rd ed.), Oxford University Press, September 2005, http://oed.com/search?searchType=dictionary&q=Silesia (Subscription or UK public library membership required.)
- ↑ Noah Webster (1884) A Practical Dictionary of the English Language
External links
- 257 Silesia at AstDyS-2, Asteroids—Dynamic Site
- 257 Silesia at the JPL Small-Body Database
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