The 37 - 82 metre wide asteroid 2015 OA26 made a close pass (2.4 LD, 0.0061 AU) travelling at 11.06 km/second, to the Earth-Moon system on the 18th July 2015 @ 11:19 UT ±00:02.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).