* Astronomy

Orbital elements:
2012 KZ3                                                 Earth MOID = 0.1007 AU
Epoch 2012 Mar. 14.0 TT = JDT 2456000.5                 MPC
M 333.41721              (2000.0)            P               Q
n   0.41017368     Peri.  173.06362     -0.54025151     +0.83437358
a   1.7940072      Node    64.18082     -0.77778070     -0.44552354
e   0.3800003      Incl.    6.97487     -0.32122499     -0.32454506
P   2.40           H   24.7           G   0.15           U   8

MPEC 2012 - K20

The 30 - 68 metre wide asteroid 2012 KZ3 will make a close pass (39.3 lunar distances, 0.1010 AU), travelling at 5.32 km/second, to the Earth-Moon system on the 21st May, 2012 @ 13:48 UT ±09:22. 

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