The 160 - 360 metre wide asteroid 2005 SB71 will make a close pass (66.2 LD, 0.1701 AU) travelling at 11.38 km/second, to the Earth-Moon system on the 8th May 2015 @ 00:53 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).