Tetsuo Yanaka (1954– ) is a post office clerk and amateur astronomer in Japan. He started his visual search for comets in 1970, and after sweeping for 1068 hours, he independently discovered C/1988 P1. Five months later, he discovered two more comets, C/1988 Y1 and C/1989 A1, only three days apart. (M 46111) _ _.