* Astronomy

Orbital elements:
2012 SK50                                                Earth MOID = 0.0566 AU
Epoch 2012 Sept. 30.0 TT = JDT 2456200.5                MPC
M  11.18231              (2000.0)            P               Q
n   0.66588039     Peri.  163.02589     +0.98595907     +0.16578024
a   1.2987889      Node   187.51734     -0.16540019     +0.95302435
e   0.1884338      Incl.    8.81150     -0.02296710     +0.25349853
P   1.48           H   24.8           G   0.15           U   7

MPEC 2012 - S71

The 31 - 69 metre wide asteroid 2012 SK50 made a close pass (22.3 lunar distances, 0.0573 AU), travelling at 5.28 km/second, to the Earth-Moon system on the 24th September, 2012 @ 04:55 UT ±00:29. 

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