* Astronomy

Orbital elements:
2011 WU4                                                 Earth MOID = 0.0834 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5                 MPC
M 310.91234              (2000.0)            P               Q
n   0.36204059     Peri.   85.98818     -0.45683886     -0.88769596
a   1.9496854      Node    31.39907     +0.76618084     -0.42544295
e   0.5224889      Incl.    6.32472     +0.45195705     -0.17605163
P   2.72           H   22.5           G   0.15           U   8

MPEC 2011 - W27

The 85 - 190 metre wide asteroid 2011 WU4 will make a close pass (32.8 lunar distances, 0.0844 AU), travelling at 10.06 km/second, to the Earth-Moon system on the 9th December, 2011 @ 09:42 UT ±00:55.

See more

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