The telescope was used by generations of students at the Oak Ridge Observatory in the Harvard College Observatory until closed in 2005, the Cook Memorial Telescope is now on loan to the Museum as the primary instrument in the Phoebe Waterman Haas Public Observatory.
The telescope was used by generations of students at the Harvard-Smithsonian Oak Ridge Observatory in Harvard, Massachusetts. When Harvard-Smithsonian Oak Ridge Observatory in 2005, the Cook Memorial Telescope is now on loan to the Museum as the primary instrument in the Phoebe Waterman Haas Public Observatory.