5176 Yoichi is a background asteroid discovered by S. Ueda (born 1952) and H. Kaneda in Kushiro Observatory on 4 January 1989.
5176 Yoichi, provisional designation 1989 AU, is a background asteroid from the central regions of the asteroid belt, approximately 17 kilometers (11 miles) in diameter. It was discovered on 4 January 1989, by Japanese astronomers Seiji Ueda and Hiroshi Kaneda at the Kushiro Observatory on Hokkaido, Japan. Seiji Ueda ( , Ueda Seiji, born 1952) is a Japanese astronomer. 
