The 46 - 100 metre wide asteroid 2016 FF1 will make a close pass (58.96 lunar distances, 0.15150 AU), travelling at 8.23 km/second, to the Earth on the 4th April 2018 @ 14:11 UT ±02:01.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).