1990 XE. Discovered 1990 Dec. 7 by K. Suzuki and T. Urata at Toyota.

Named for the Kyoto University's Kwasan Observatory, which is located at the top of Kwasan hill on the eastern side of Kyoto city {see planet (4352)}. Kwasan Observatory was established in 1929 and is known for its observational studies of the solar system, especially of Mars, Pluto, minor planets, comets and natural satellites. (M 21610)

Name proposed by T. Mitani, who observed this planet at Kyoto on 1953 Nov. 3.

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