* Astronomy

Orbital elements:
2012 UW158                                               Earth MOID = 0.0269 AU
Epoch 2012 Sept. 30.0 TT = JDT 2456200.5                MPC
M   6.75485              (2000.0)            P               Q
n   0.29314461     Peri.  282.07902     +0.59016256     +0.74906059
a   2.2443027      Node    31.13249     -0.29862741     +0.54900130
e   0.6880195      Incl.   35.60778     -0.75001988     +0.37081775
P   3.36           H   23.8           G   0.15           U   7

MPEC 2012 - U108

The 45 - 100 metre wide asteroid 2012 UW158 made a close pass (10.6 lunar distances, 0.0272 AU), travelling at 26.57 km/second, to the Earth-Moon system on the 22nd October, 2012 @ 13:04 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).