Named in honor of Rune Fogelquist (b. 1924) for his inspiring activities in astronomy popularization within the Mariestad Astronomy Club, located near Lake Vänern in southern Sweden, and the building and running of the nearby Bifrost Observatory, the main instrument at which is a 0.60-m reflector. The observatory has about 1000 visitors annually. The naming commemorates the twentieth anniversary of the Mariestad Astronomy Club, celebrated in August 1998. Name proposed and citation prepared by H. Rickman.