1529 Oterma, provisional designation 1938 BC, is a reddish, rare-type Hildian asteroid from the outermost region of the asteroid belt, approximately 60 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland on 26 January 1938. In the 1990s, during a study of 47 Hilda asteroids, a rotational light-curve was obtained for this asteroid from photometric observations taken at the Swedish Uppsala Astronomical Observatory and other places. It gave a a rotation period of 15.75 hours with a brightness amplitude of 0.18 in magnitude (U=2).