1990 SD4. Discovered 1990 Sept. 16 by T. Fujii and K. Watanabe at Kitami.

Named in honor of Seiji Ueda (1952– ), well known for his observations of comets and minor planets. He lives in Kushiro {see planet (4096)} and has been an enthusiastic astronomer since his junior high school days. He played an active part in ice hockey as a Japanese-league player for six years. After retirement, he renewed his interest in astronomy. Since 1987 he has used a Wright-Schmidt Camera of 16 cm aperture and has discovered many minor planets. (M 22503)