The 480 - 1100 metre wide asteroid (206378) 2003 RB will make a close pass (20.7 LD, 0.0531 AU) travelling at 8.47 km/second, to the Earth-Moon system on the 22nd August 2015 @ 02:59 UT ±00:01.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
