The 48 - 110 metre wide asteroid 2018 FF1 will make a close pass (71.4 lunar distances, 0.1837 AU), travelling at 5.16 km/second, to the Earth on the 8th April 2018 @ 21:53 UT ±00:06.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
