NASA
18th November 2013, 22:20
http://solarsystem.nasa.gov/planets/images/default-asteroids.jpg (http://solarsystem.nasa.gov/news/display.cfm?News_ID=45552)18 Nov 2013 - Update on Near-Earth Objects
While initial reports from the Minor Planet Center in Cambridge, Mass., categorized object 2013 US10 as a very large near-Earth asteroid, new observations now indicate that it is, in fact, a long-period comet, and it is now designated C/2013 US10.
More... (http://solarsystem.nasa.gov/news/display.cfm?News_ID=45552)
While initial reports from the Minor Planet Center in Cambridge, Mass., categorized object 2013 US10 as a very large near-Earth asteroid, new observations now indicate that it is, in fact, a long-period comet, and it is now designated C/2013 US10.
More... (http://solarsystem.nasa.gov/news/display.cfm?News_ID=45552)