The 14 - 31 metre wide asteroid 2015 LR21 will make a close pass (2.5 LD, 0.0065 AU) travelling at 13.76 km/second, to the Earth-Moon system on the 20th June 2015 @ 06:15 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).
