1973 SQ4. Discovered 1973 Sept. 27 by L. I. Chernykh at Nauchnyj.
Named in memory of Academician Mstislav Vsevo-lodovich Keldysh (1911–1978), famous Soviet scientist and mathematician who made a valuable contribution to space science and engineering. He was president of the U.S.S.R. Academy of Sciences from 1961 to 1975. (M 5849)
Obituary published in Icarus, Vol. 41, p. 320–322 (1980).