Spacewatch is a project at the University of Arizona that specializes in the study of minor planets, and including various types of asteroids and comets.
The project leader is Dr. Robert S. McMillan.
Spacewatch discovered a moon of Jupiter, now named Callirrhoe, which was originally mistaken for an asteroid.
Other notable discoveries include 5145 Pholus, 20000 Varuna, 1998 KY26 and (35396) 1997 XF11. The project also recovered 719 Albert (a long-lost asteroid), and found the periodic comet 125P/Spacewatch .
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