The asteroid 2917, discovered in 1980, was named Asteroid Sawyer Hogg in 1984. Helen Sawyer Hogg contributed to the advancement of astronomy and was world renowned for her research on variable stars. J.A. Braschear Co., of Allegheny, PA manufactured the original lens and Perkin-Elmer Corporation of Norwalk, CT, the current lens. The telescope axis is at an angle of 45 degrees, the latitude of Ottawa. Warner and Swasey Company of Cleveland, Ohio manufactured the telescope mounting and the original driving mechanism, a conical pendulum clock.
Electricity drives the telescope now.
For further information on telescopes and Helen Sawyer Hogg visit Science Information or the Library at the Canada Science and Technology Museum.