The 16 - 36 metre wide asteroid 2015 HK10 will make a close pass (33.9 LD, 0.0871 AU) travelling at 5.18 km/second, to the Earth-Moon system on the 10th June 2015 @ 19:27 UT ±02:55.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).