The 20 - 44 metre wide asteroid 2018 FB2 will make a close pass (9.98 lunar distances, 0.02564 AU), travelling at 6.70 km/second, to the Earth on the 30th March 2018 @ 06:33 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).