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2015-03-06. NASA Spacecraft Becomes First to Orbit a Dwarf Planet.

posted Mar 8, 2015, 2:20 PM by Alan Gould   [ updated Mar 10, 2015, 9:06 AM by Alan Gould ]
NASA RELEASE 15-034. For GSS A Changing Cosmos chapter 7. Excerpt: NASA's Dawn spacecraft has become the first mission to achieve orbit around a dwarf planet. The spacecraft was approximately 38,000 miles (61,000 kilometers) from Ceres when it was captured by the dwarf planet’s gravity at about 4:39 a.m. PST (7:39 a.m. EST) Friday. ..."Since its discovery in 1801, Ceres was known as a planet, then an asteroid and later a dwarf planet," said Marc Rayman, Dawn chief engineer and mission director at JPL. "Now, after a journey of 3.1 billion miles (4.9 billion kilometers) and 7.5 years, Dawn calls Ceres, home."....  http://www.nasa.gov/press/2015/march/nasa-spacecraft-becomes-first-to-orbit-a-dwarf-planet/#.VPy7UmZIfZE. See also New York Times photos.