The 16 - 36 metre wide asteroid 2016 HF2 will make a close pass (62.4 lunar distances, 0.16036 AU), travelling at 4.52 km/second, to the Earth on the 3rd June 2018 @ 14:18 UT ±07:11.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).