The 46 - 100 metre wide asteroid 2015 BN will make a close pass (64.2 LD, 0.1650 AU) travelling at 3.81 km/second, to the Earth-Moon system on the 15th February 2015 @ 19:37 UT ±00:46.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).