The 34 - 75 metre wide asteroid 2014 WO4 will make a close pass (4.0 lunar distances, 0.0102 AU) travelling at 20.00 km/second, to the Earth-Moon system on the 20th November 2014 @ 21:36 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).
