(38669) Michikawa = 2000 PX3
Michikawa is the name of the area in Yurihonjo City, Akita Prefecture,
Japan. From 1955 to 1962, the first rocket range in Japan, the Akita Rocket
Range of the University of Tokyo, was located in this area.
A complete set of naming citations of the numbered minor planets is available in the Dictionary of Minor Planet Names, edited by Lutz Schmadel.