Named in memory of Shotaro Miyamoto (1912-1992), professor of astrophysics at Kyoto University. His interests included relativistic cosmology, planetary nebulae, solar physics, lunar geology and Martian meteorology. He also contributed greatly to the popularization of astronomy through his many books and radio and television broadcasts. Director of the Kwasan and Hida Observatories, he also served as president of the International Lunar Society, vice president of the International Association of Planetology, president of the Astronomical Society of Japan and vice president of the Oriental Astronomical Association. Name proposed by the discoverer following a suggestion by K. Sakka and T. Sato.