The 3 - 6 metre wide asteroid 2017 FJ3 will make a close pass (2.6 LD, 0.0066 AU), travelling at 2.26 km/second, to the Earth-Moon system on the 22nd March 2017 @ 20:59 UT ±00:03.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).