1951 RJ. Discovered 1951 Sept. 4 by K. Reinmuth at Heidelberg.
Named in honor of Keiji Saito, astrophysicist at the Tokyo Astronomical Observatory during 1961–1985 who has studied the physics of comets and meteors. While still a college student, he was an independent discoverer of the nova T CrB at its 1946 recurrence and has inspired many amateur astronomers in Japan. (M 11748)
Name proposed by H. Oishi, who made the key identification involving this planet.