* Astronomy

Orbital elements:
2011 QS2                                                 Earth MOID = 0.0751 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5                 MPC
M 333.99784              (2000.0)            P               Q
n   0.45260522     Peri.   78.66877     +0.70790494     -0.68352744
a   1.6800531      Node   324.02696     +0.46979877     +0.64378831
e   0.5017670      Incl.   17.63290     +0.52740848     +0.34398669
P   2.18           H   20.4           G   0.15           U   7

MPEC 2011 - Q09

The 220 - 490 metre wide asteroid 2011 QS2 will make a close pass (47.6 lunar distances, 0.1222 AU), travelling at 13.01 km/second, to the Earth-Moon system on the 3rd September, 2011 @ 03:14 UT ±00:11.

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