* Astronomy

The 28 - 62 metre wide asteroid 2013 RX73 made a close pass (25.7 lunar distances, 0.0659 AU), travelling at 2.87 km/second, to the Earth-Moon system on the 9th October 2013 @ 00:11 UT ±00:06. 

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