The 250 - 550 metre wide asteroid 2015 MP1 will make a close pass (63.1 LD, 0.1620 AU) travelling at 13.26 km/second, to the Earth-Moon system on the 1st July 2015 @ 04:32 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).