The 35 - 78 metre wide asteroid 2014 WW202 will make a close pass (68.6 LD, 0.1762 AU) travelling at 6.34 km/second, to the Earth-Moon system on the 15th March 2015 @ 00:09 UT ±1 day 13:13.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).