Masayuki Yanai

Masayuki Yanai (箭内 政之, Yanai Masayuki^?, born 1959) is a Japanese astronomer. He is a prolific co-discoverer of minor planets. One of his co-discoveries is the dark, inner main-belt asteroid 3915 Fukushima. He retired from docent for astronomy at Sapporo Science Center.

The asteroid 4260 Yanai, discovered by Japanese astronomers Seiji Ueda and Hiroshi Kaneda at Kushiro Observatory (399) in 1989, was named in his honor on 8 July 1990 (M.P.C. 16593).

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