Masahiro Koishikawa (小石川 正弘, Koishikawa Masahiro, 1952 – 26 August 2020) was a Japanese astronomer. He studied both major and minor planets, and discovered multiple asteroids.[2]
Koishikawa was a staff member of the Sendai Astronomical Observatory frin 1972. His research was based out of the Sendai's Ayashi (391) station. The main-belt asteroid 6097 Koishikawa, discovered by Kin Endate and Kazuro Watanabe at Kitami in 1991, was named in his honor.[2] He died on 26 August 2020 from lung cancer.[3]
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