The 280 - 620 metre wide asteroid 2013 RM43 will make a close pass (30.9 lunar distances, 0.0795 AU), travelling at 14.74 km/second, to the Earth-Moon system on the 7th November, 2013 @ 16:48 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).