The 580 - 1300 metre wide asteroid (337866) 2001 WL15 will make a close pass (31.3 LD, 0.0804 AU) travelling at 7.23 km/second, to the Earth-Moon system on the 14th January 2016 @ 13:03 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).