The 10 - 22 metre wide asteroid 2015 HP171 will make a close pass (75.1 LD, 0.1929 AU) travelling at 16.63 km/second, to the Earth-Moon system on the 28th May 2015 @ 16:30 UT ±00:01.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
