Dawn
Space probe
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Dawn is a retired space probe that was launched by NASA in September 2007 with the mission of studying two of the three known protoplanets of the asteroid belt: Vesta and Ceres. Wikipedia
Cost: 446 million USD (2007)
Launch date: September 27, 2007 at 7:34 AM EDT
Manufacturers: Jet Propulsion Laboratory, University of California, Los Angeles, and Orbital Sciences Corporation
Max speed: 25,640 mph
Apoapsis altitude: 3,973.866 kilometres (2,469.246 mi)
Closest approach: February 18, 2009, 00:27:58 UTC
COSPAR ID: 2007-043A