The 49 - 110 metre wide asteroid 2015 QG made a close pass (10.9 LD, 0.0281 AU) travelling at 13.69 km/second, to the Earth-Moon system on the 13th August 2015 @ 19:12 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).
