Lowell (Martian crater) Lowell (Martian crater) The Lowell Crater is a large impact crater on Aonia Terra in the Thaumasia quadrangle of Mars. The crater is about 203 kilometers (127 miles) in diameter. Lowell Crater has a ring of mountains on its floor which gives it a sort of bull's eye appearance. Its nearby features include the craters Slipher to the north, Douglass to the east, and Coblentz to the southwest, the small mountain Aonia Mons to the west, and Aonia Planum to the southeast. Lowell Crater is named for Percival Lowell who built the Lowell Observatory in Flagstaff, Arizona, in 1894, and
Perkins Observatory instrument on site, interest in Perkins Observatory within the Ohio State University Astronomy Department declined. The on-site staff shrank until there was just a part-time secretary and a building superintendent who had only a small maintenance budget. Few of the observatory’s Directors (employees of OSU) spent much time at the observatory. There was not even enough money in the budget to maintain subscriptions to prominent astronomy magazines for the Observatory’s library. For some years a small dome detached and separated from the main observatory building housed a 0.6-meter f1.8 Schmidt telescope. In 1990 this instrument was moved to Lowell Observatory