* Astronomy

The 44 - 99 metre wide asteroid 2013 RN9 made a close pass (29.1 lunar distances, 0.0748 AU), travelling at 9.39 km/second, to the Earth-Moon system on the 9th October 2013 @ 08:37 UT ±00:02. 

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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).