* Astronomy

Orbital elements:
2012 XJ112                                               Earth MOID = 0.0008 AU
Epoch 2012 Sept. 30.0 TT = JDT 2456200.5                MPC
M 348.41724              (2000.0)            P               Q
n   0.73608910     Peri.  101.63752     +0.99881766     +0.02477421
a   1.2148308      Node   256.95327     -0.03910424     +0.92061116
e   0.3679975      Incl.    2.46078     +0.02888135     +0.38969390
P   1.34           H   27.0           G   0.15           U   8

MPEC 2012 - X76

The 11 - 24 metre wide asteroid 2012 XJ112 made a close pass (2.4 lunar distances, 0.0061 AU), travelling at 11.03 km/second, to the Earth-Moon system on the 10th December, 2012 @ 05:27 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).