Welcome to the MMT Observatory


Latest News

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  • Tours Closed for Summer Season

    Due to scheduled maintenance to the Mt. Hopkins Road and at the MMTO, the tour season is closed down for the summer. Tours will resume toward the end of August or in early September, depending on the weather. Come visit us in the fall!

  • Observatory Improvements

    The observatory will be closed June 18 through July 1 for shutter seal replacement. As part of the new heated roof contract, the p-seal and flapper seal used to seal the gap between the two shutter halves when in the closed position will be replaced. This work was scheduled to take place before the start of the monsoon season. Regular shutdown will be July 24-August 13 during which various maintenance tasks are scheduled.

  • MMT Observing Schedule - May-August

    The observing schedule and program titles for May-August can be found here.