257 Silesia

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.

257 Silesia
Modelled shape of Silesia from its lightcurve
Discovery[1]
Discovered byJ. Palisa
Discovery siteVienna Observatory
Discovery date5 April 1886
Designations
(257) Silesia
Pronunciation/sˈlʃiə/[2][3]
Named after
Silesia (region)[4]
1929 DD · 1952 FL1
1952 HU
main-belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc129.94 yr (47462 d)
Aphelion3.4669 AU (518.64 Gm)
Perihelion2.7711 AU (414.55 Gm)
3.1190 AU (466.60 Gm)
Eccentricity0.11154
5.51 yr (2012.0 d)
30.606°
0° 10m 44.148s / day
Inclination3.6351°
34.364°
27.605°
Earth MOID1.78299 AU (266.732 Gm)
Jupiter MOID1.8503 AU (276.80 Gm)
TJupiter3.204
Physical characteristics
Dimensions72.66±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

    Description

    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. "JPL Small-Body Database Browser: 257 Silesia" (2015-09-16 last obs.). Jet Propulsion Laboratory. 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. 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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