The 8 - 19 metre wide asteroid 2018 FO4 will make a close pass (7.69 lunar distances, 0.0197 AU), travelling at 6.27 km/second, to the Earth on the 28th March 2018 @ 20:15 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).