The 51 - 110 metre wide asteroid 2015 FL120 will make a close pass (58.8 LD, 0.1511 AU) travelling at 6.44 km/second, to the Earth-Moon system on the 14th April 2015 @ 14:26 UT ±01:00.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).