The 330 - 750 metre wide asteroid (434154) 2002 SL will make a close pass (70.3 LD, 0.1806 AU) travelling at 9.86 km/second, to the Earth-Moon system on the 8th August 2015 @ 06:02 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).