The 20 - 46 metre wide asteroid 2014 GD34 will make a close pass (25.0 lunar distances, 0.0642 AU), travelling at 4.49 km/second, to the Earth-Moon system on the 9th April 2014 @ 07:55 UT ±00:52.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).