* Astronomy

The 220 - 490 metre wide asteroid 2004 SB1 will make a close pass (67.9 lunar distances, 0.1745 AU), travelling at 19.57 km/second, to the Earth-Moon system on the 5th October 2013 @ 20:25 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).