Last update 2002 March 13
UPDATE: On 1997 June 30, UTSO ceased operating due to lack of funds. An agreement was subsequently made with the Argentine observatory at El Leoncito to move the telescope, operate it, and maintain it, reserving 25% of the time for the University of Toronto. The instrument retained its name, Helen Sawyer Hogg Telescope (HSHT), as a continuing tribute to one of Canada's best-known astronomers.

View photographs of the dismantlement and move of the UTSO dome, HSHT, and supporting instrumentation. Also shown are the new site and construction work on the new building.

From 1971 until 1997, the University of Toronto Southern Observatory (UTSO) operated the 60-cm HSHT in the foothills of the Andes mountains in north-central Chile, where the skies are as nearly perfect for astronomical research as anywhere on Earth.

UTSO was open to all professional astonomers, regardless of institutional affiliation or national origin.

          Coordinates:  70 42.'0 W         Altitude:  2280 m
                        29 00.'5 S

The following hypertext links guide you through the UTSO pages:

Time applications (N/A)
Information for Travellers (N/A)
Current Schedule (N/A)

On 1996 September 6-7, the David Dunlap Observatory hosted an informal workshop to celebrate 25 years of operation at UTSO. View a photograph.

UTSO was operated in part by David Dunlap Observatory endowment funds, and in part with funds made available by the Natural Science and Engineering Research Council. UTSO was a research facility of the Department of Astronomy and Astrophysics at the University of Toronto.

Questions regarding UTSO and the HSHT should be directed to Robert Garrison:

Photographs courtesy of Ian Shelton ( and Robert Garrison.