1991 HD. Discovered 1991 Apr. 16 by A. Sugie at Taga.

Named in memory of Hisashi Terao (1855-1923), who was the first Japanese professor of astronomy (18841919) at Tokyo Imperial University, the first director (1888-1919) of the Tokyo Astronomical Observatory and the first president of the Astronomical Society of Japan. Soon after he finished the course of physics at the newly-established Tokyo University he was sent to Paris to study celestial mechanics under Tisserand {see planet (3663)}, his main interest being in transits of Venus. He was also one of the founders of Tokyo Science University and later served as its president. (M 25653)

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