SPACEWATCH® is the name of a group at the University of Arizona's Lunar and Planetary Laboratory founded by Prof. Tom Gehrels and Dr. Robert S. McMillan in 1980. Today, Spacewatch is led by Dr. Robert S. McMillan.
The construction of Steward Observatory was dedicated in 1923. The 36 inch diameter Newtonian telescope was the first astronomical telescope to have been built using all American-made products, and it was built on a then isolated patch of University land—a former ostrich farm. By 1963, the observatory's original telescope was removed from the dome and relocated to a darker location on a mountain: Kitt Peak, where it stands today. This telescope continues in regular and productive use by the Spacewatch Project