The 12 - 26 metre wide asteroid 2015 HU10 made a close pass (48.3 LD, 0.1242 AU) travelling at 7.06 km/second, to the Earth-Moon system on the 18th April 2015 @ 02:38 UT ±00:25.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).