The 17 - 39 metre wide asteroid 2015 LF21 made a close pass (3.2 LD, 0.0081 AU) travelling at 19.34 km/second, to the Earth-Moon system on the 11th June 2015 @ 21:13 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).
