The 13 - 30 metre wide asteroid 2018 GP4 will make a close pass (11.3 lunar distances, 0.02917 AU), travelling at 9.34 km/second, to the Earth on the 17th April 2018 @ 14:00 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).