The 33 - 75 metre wide asteroid 2015 HZ will make a close pass (32.9 LD, 0.0844 AU) travelling at 5.92 km/second, to the Earth-Moon system on the 6th May 2015 @ 09:35 UT ±00:05.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).