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1500 Jyväskylä
1500 Jyväskylä, provisional designation 1938 UH, is a stony asteroid from the inner regions of the asteroid belt, roughly about 10 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at the Turku Observatory in southwestern Finland, on 16 October 1938.〔
The S-type asteroid orbits the Sun at a distance of 1.8–2.7 AU once every 3 years and 4 months (1,227 days). Its orbit shows an eccentricity of 0.19 and is tilted by 7 degrees to the plane of the ecliptic.
Little is known about the asteroids size, composition, albedo and rotation, despite having a well-observed orbit with the lowest possible uncertainty – which is denoted by a condition code of 0 – and an observation arc that spans over a time period of almost 70 years.〔 With an absolute magnitude of 13.06, the asteroid's diameter could be anywhere between 6 and 14 kilometers for an assumed albedo in the range of 0.05–0.25 ''(see NASA's conversion table)''.〔 Since the asteroid's spectral type is that of a brighter stony rather than a darker carbonaceous body, its diameter is on the lower end of NASA's generic conversion table, as an object's diameter decreases, when its albedo increases for a given absolute magnitude.〔
The minor planet was named for the Finnish town Jyväskylä.〔 It is the largest city in the region of Central Finland and on the Finnish Lakeland.
== References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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