The 31 - 68 metre wide asteroid 2007 CX50 will make a close pass (50.3 lunar distances, 0.1293 AU) travelling at 6.18 km/second, to the Earth-Moon system on the 20th October 2014 @ 20:51 UT ±17:11.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).