* Astronomy

Orbital elements:
2012 KW                                                  Earth MOID = 0.0055 AU
Epoch 2012 Mar. 14.0 TT = JDT 2456000.5                 MPC
M 308.10118              (2000.0)            P               Q
n   0.53278808     Peri.  213.36583     +0.06297110     +0.97698958
a   1.5069530      Node    61.00486     -0.85711353     +0.15754120
e   0.3527840      Incl.   13.47264     -0.51126415     -0.14377809
P   1.85           H   26.6           G   0.15           U   7

MPEC 2012 - K10

The 13 - 29 metre wide asteroid 2012 KW will make a close pass (3.4 lunar distances, 0.0086 AU), travelling at 10.14 km/second, to the Earth-Moon system on the 21st May, 2012 @ 20:27 UT ±00:12. 

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