Named in memory of Sachiko Isoda (1912–1993), who joined the Tokyo Astronomical Observatory in 1943 as a computing assistant. After the war she moved to the Department of Astronomy at University of Tokyo and was for many years secretary to Y. Hagihara {see planet  (1971)}. After her formal retirement she stayed on as a part-time employee, and her fine work impressed many astronomers who graduated from the Univerity of Tokyo. (M 30099) _ _.