* Astronomy

Orbital elements:
2012 RN15                                                Earth MOID = 0.0460 AU
Epoch 2012 Sept. 30.0 TT = JDT 2456200.5                MPC
M  22.48235              (2000.0)            P               Q
n   0.60486886     Peri.  157.45823     +0.87465969     +0.48091771
a   1.3847198      Node   172.83867     -0.48469284     +0.86938775
e   0.2517480      Incl.   29.15545     -0.00657847     -0.11350376
P   1.63           H   24.5           G   0.15           U   7

MPEC 2012 - S11

The 34 - 76 metre wide asteroid 2012 RN15 made a close pass (18.9 lunar distances, 0.0484 AU), travelling at 15.96 km/second, to the Earth-Moon system on the 13th September, 2012 @ 23:04 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).