Named in honor of Masanori Matsuyama (1950– ), who started observing minor planets in 1987 and has discovered many new minor planets since then. He lives in Kushiro {see planet (4096)} and makes observations of minor planets and comets as a member of “Hokkaido Showakusei Suisei Kaigi”. (M 22503) _ _.
Discovered on 23-1-1991 in Kushiro by Ueda, S., Kaneda, H.