Angell Hall Observatory is an astronomical observatory owned and operated by University of Michigan. It is located on the UM Central Campus on top of Angell Hall in Ann Arbor, Michigan (USA). It has a computer-controlled 0.4-m Cassegrain telescope in its single dome, and a small radio telescope on the roof. In the past has housed a large, clock-driven refracting telescope and a reflecting telescope in side-by-side domes.