Named in honor of Yu-che Chang {1902–1986}, one of the leading astronomers in the Peoples Republic of China, Director of the Purple Mountain Observatory, Nanking, since 1950, and long an active observer of minor planets and comets and computer of their orbits. He has also determined rotation periods of minor planets and has worked on spectroscopic binaries. From 1927 to 1929 he was on the staff of the Yerkes Observatory. (M 4420) _ _.