The grainy , black and white photos show the asteroid , about a third of a mile in size , spinning through space , with its 230-foot-wide moon trailing behind . The asteroid was its closest on Sunday morning , but the best viewing was Monday night . Asteroid 2011 ##P passed within 750,000 miles of Earth . Satellite photos released Monday showed small satellites orbiting the asteroid .
The asteroid was its closest on Sunday morning , but the best viewing was Monday night . Asteroid 2011 ##P passed within 750,000 miles of Earth . Satellite photos released Monday showed small satellites orbiting the asteroid .