Dwarf Planet Found

A new dwarf planet has been discovered orbiting in the Kuiper Belt. 2015 RR245 is believed to be about 700 km in diameter with an highly elliptical orbit, believed to have a perihelion of 34 AU and an apohelion of 120 AU. The dwarf planet would have an orbital period of approximately 700 years.
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Dawn at Ceres

NASA’s Dawn spacecraft entered orbit around Ceres at approximately 7:40 ET on the morning on March 6, the first time a spacecraft has orbited a dwarf planet. Ceres is the largest asteroid and the first discovered, on January 1, 1801. Originally classified as a planet, it was re-classified as an asteroid when it was clear that it was only one of many objects between Mars and Jupiter. Dawn previously orbited Vesta, the second largest asteroid and the fourth discovered, from 2011-2012. This is the first time a spacecraft went into orbit around two objects outside the Earth-Moon system. Dawn will begin its study of Ceres next month and will remain in orbit until 2016.

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