The 15 - 33 metre wide asteroid 2015 RL35 made a close pass (27.0 LD, 0.0693 AU) travelling at 3.52 km/second, to the Earth-Moon system on the 7th September 2015 @ 04:21 UT ±00:36.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).