Named in honor of Sergej Konstantinovich Kostinsky (1867–1936), one of the founders of astrophotography and photographical astrometry in Russia, a corresponding member of the U.S.S.R. Academy of Sciences and a staff member of the Pulkovo Observatory. He made numerous determinations of stellar parallaxes and proper motions, studied star clusters and nebulae, as well as planets and their satellites. (M 10548) _ _.