* Astronomy

The 80 - 180 metre wide asteroid 2013 ST19 will make a close pass (43.2 lunar distances, 0.1110 AU), travelling at 12.25 km/second, to the Earth-Moon system on the 28th September, 2013 @ 07:17 UT ±00:27. 

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