257 Silesia

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257 Silesia
000257-asteroid shape model (257) Silesia.png
Modelled shape of Silesia from its lightcurve
Discovery [1]
Discovered by J. Palisa
Discovery site Vienna Observatory
Discovery date5 April 1886
Designations
(257) Silesia
Pronunciation /saɪˈliːʃiə/ [2] [3]
Named after
 Silesia (region) [4]
A886 GB, 1929 DD
1952 FL1, 1952 HU
main-belt
Orbital characteristics [1]
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)
TJupiter 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 5 April 1886 at Vienna Observatory, Austria.

    Light curve-based 3D-model of Silesia 257Silesia (Lightcurve Inversion).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). [4]

    References

    1. 1 2 "JPL Small-Body Database Browser: 257 Silesia" (2015-09-16 last obs.). Jet Propulsion Laboratory. Archived from the original on 20 September 2020. Retrieved 11 May 2016.
    2. ↑ "Silesia" . Oxford English Dictionary (Online ed.). Oxford University Press.(Subscription or participating institution membership required.)
    3. ↑ Noah Webster (1884) A Practical Dictionary of the English Language
    4. 1 2 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.


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