The 12 - 27 metre wide asteroid 2013 RM73 will make a close pass (2.3 lunar distances, 0.0058 AU), travelling at 9.90 km/second, to the Earth-Moon system on the 17th September, 2013 @ 00:37 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).
