Additional information from http://neo.jpl.nasa.gov/news/news171.html http://neo.jpl.nasa.gov/news/news171.html : - the asteroid is 400 meters in size - it's

Additional information from http://neo.jpl.nasa.gov/news/news171.html http://neo.jpl.nasa.gov/news/news171.html : - the asteroid is 400 meters in size - it's a "C-type" asteroid (http://en.wikipedia.org/wiki/C-type_asteroid http://en.wikipedia.org/wiki/C-type_asteroid)