* Astronomy

Orbital elements:
2012 US18                                                Earth MOID = 0.0039 AU
Epoch 2012 Sept. 30.0 TT = JDT 2456200.5                MPC
M 298.30541              (2000.0)            P               Q
n   0.76000755     Peri.  266.00078     -0.37081663     -0.92826540
a   1.1892070      Node   205.82310     +0.87600843     -0.33938070
e   0.3530535      Incl.    3.76555     +0.30838979     -0.15213179
P   1.30           H   28.6           G   0.15           U   7

MPEC 2012 - U46

The 5 - 11 metre wide asteroid 2012 US18 will make a close pass (1.6 lunar distances, 0.0042 AU), travelling at 9.98 km/second, to the Earth-Moon system on the 22nd October, 2012 @ 11:15 UT ±00:06. 

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