The 37 - 83 metre wide asteroid 2015 FB34 will make a close pass (22.4 LD, 0.0575 AU) travelling at 6.89 km/second, to the Earth-Moon system on the 4th April 2015 @ 15:58 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).