* Astronomy

Orbital elements:
2013 NK4                                            PHA, Earth MOID = 0.0129 AU
Epoch 2013 Apr. 18.0 TT = JDT 2456400.5                 MPC
M 190.67507              (2000.0)            P               Q
n   0.96209794     Peri.   51.41201     +0.09901321     -0.99319480
a   1.0162250      Node    33.06123     +0.87445736     +0.05743516
e   0.5449886      Incl.    6.45416     +0.47489020     +0.10131775
P   1.02           H   18.7           G   0.15           U   9

MPEC 2013 - N15

Key to Orbital elements

The 480 - 1100 metre wide asteroid 2013 NK4 will make a close pass (45.6 lunar distances, 0.1172 AU), travelling at 17.86 km/second, to the Earth-Moon system on the 13th August, 2013 @ 18:50 UT ±05:03. 

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