The 26 - 58 metre wide asteroid 2018 FW1 will make a close pass (9.20 LD, 0.02365 AU), travelling at 7.33 km/second, to the Earth-Moon system on the 24th March 2018 @ 18:49 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).