The 48 - 110 metre wide asteroid 2015 KV18 made a close pass (48.5 LD, 0.1247 AU) travelling at 4.88 km/second, to the Earth-Moon system on the 18th May 2015 @ 22:05 UT ±09:45.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).