* Astronomy

Orbital elements:
2012 RW16                                                Earth MOID = 0.0525 AU
Epoch 2012 Sept. 30.0 TT = JDT 2456200.5                MPC
M   2.70282              (2000.0)            P               Q
n   0.25585471     Peri.  357.33806     +0.99936069     +0.03573648
a   2.4573882      Node     0.61691     -0.03072746     +0.87360664
e   0.5701229      Incl.    5.61688     -0.01827647     +0.48531880
P   3.85           H   25.2           G   0.15           U   7

MPEC 2012 - S22

The 24 - 54 metre wide asteroid 2012 RW16 made a close pass (21.3 lunar distances, 0.0547 AU), travelling at 7.41 km/second, to the Earth-Moon system on the 15th September, 2012 @ 23:28 UT ±00:04. 

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