* Astronomy

The 440 - 980 metre wide asteroid 1991 TF3 will make a close pass (33.4 lunar distances, 0.0857 AU), travelling at 13.84 km/second, to the Earth-Moon system on the 16th September, 2011 @ 23:10 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).