1500 Jyväskylä (jyvæs-kylæ), provisional designation 1938 UH, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 16 October 1938, by Finnish astronomer Yrjö Väisälä at the Turku Observatory in Southwest Finland.[8] It was named for the Finnish town Jyväskylä.[2]
Classification and orbit
Jyväskylä is a member of the Flora family, a large collisional group of stony asteroids. It orbits the Sun in the inner main-belt at a distance of 1.8–2.7 AU once every 3 years and 4 months (1,227 days). Its orbit has an eccentricity of 0.19 and an inclination of 7° with respect to the ecliptic.[1] The body's observation arc begins at Turku, 3 weeks prior to its official discovery observation.[8]
Physical characteristics
In 2016, a modeled lightcurve was derived from data contained in the Lowell photometric database. Light-curve analysis gave it a rotation period of 8.8275 hours and a spin axis of (123°, −75.0°) in ecliptic coordinates (U=n.a.).[7]
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures between 7.39 and 8.095 kilometers in diameter, and its surface has an albedo between 0.161 and 0.31.[4][5][6] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of this family – and calculates a diameter of 6.63 kilometers, using an absolute magnitude of 13.06.[3]
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