The 31 - 69 metre wide asteroid 2015 BL514 will make a close pass (40.1 LD, 0.1032 AU) travelling at 5.64 km/second, to the Earth-Moon system on the 18th February 2015 @ 21:25 UT ±00:06.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).