The 11 - 25 metre wide asteroid 2013 WV43 will make a close pass (9.5 lunar distances, 0.0243 AU), travelling at 8.78 km/second, to the Earth-Moon system on the 3rd December, 2013 @ 04:02 UT ±00:03.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).