Named in honor of Henry Norris Russell {1877–1957}, one of the world’s most distinguished astronomers, noted for the H-R diagram and his brilliant research on a variety of topics in fundamental astronomy, astrophysics, and the analysis of atomic spectra (RS-or Russell-Saunders coupling). His advice and counsel were sought by many astronomers who valued his scientific judgement and respected his wide range of interests and encyclopedic knowledge of many subjects. His Ph.D. thesis at Princeton was on the general perturbations of the major axis of the orbit of {433} Eros by the action of Mars. (M 3143) _ _.