Named in honor of Kazutaka Kato (b. 1949), director of the Hiroshima City Planetarium. He was president of the Hiroshima Astronomical Society from 1975 to 1980 and was admired for his enthusiasm in presenting the universe to the general public in easily understood terms. His support activities at the society ranged from telescope design to discussions of astrophysical discoveries. Name proposed by the discoverers following a suggestion by Y. Yamada.