* Astronomy

Orbital elements:
2012 RK15                                                Earth MOID = 0.0046 AU
Epoch 2012 Sept. 30.0 TT = JDT 2456200.5                MPC
M 350.33435              (2000.0)            P               Q
n   0.27580093     Peri.   26.53291     +0.45011441     -0.89295929
a   2.3374315      Node    36.71656     +0.81792568     +0.41023561
e   0.6653223      Incl.    0.43632     +0.35832193     +0.18528481
P   3.57           H   23.4           G   0.15           U   7

MPEC 2012 - S08

The 55 - 120 metre wide asteroid 2012 RK15 will make a close pass (8.2 lunar distances, 0.0210 AU), travelling at 15.01 km/second, to the Earth-Moon system on the 24th September, 2012 @ 16:59 UT ±00:08. 

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