* Astronomy

Orbital elements:
2005 UC                                                  Earth MOID = 0.1243 AU
Epoch 2012 Sept. 30.0 TT = JDT 2456200.5                MPC
M   2.05801              (2000.0)            P               Q
n   0.28444421     Peri.  150.35488     +0.98767855     -0.14427338
a   2.2898374      Node   218.09066     +0.11714164     +0.93847220
e   0.5131623      Incl.    5.64037     +0.10377338     +0.31377559
P   3.47           H   19.9           G   0.15           U   1

MPEC 2012 - O30

The 270 - 610 metre wide asteroid 2005 UC will make a close pass (77.5 lunar distances, 0.1992 AU), travelling at 7.55 km/second, to the Earth-Moon system on the 17th September, 2012 @ 16:43 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).