* Astronomy

Orbital elements:
2011 WC39                                                Earth MOID = 0.0835 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5                 MPC
M 320.45222              (2000.0)            P               Q
n   0.54504441     Peri.  331.97143     +0.68222041     -0.71528786
a   1.4842764      Node    74.56870     +0.69675360     +0.57324217
e   0.2889993      Incl.    9.03971     +0.22160715     +0.39969576
P   1.81           H   23.1           G   0.15           U   7

MPEC 2011 - W51

The 64 - 140 metre wide asteroid 2011 WC39 made a close pass (36.6 lunar distances, 0.0941 AU), travelling at 5.52 km/second, to the Earth-Moon system on the 22nd November, 2011 @ 14:23 UT ±03:21.

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