* Astronomy

Orbital elements:
2013 KS1                                                 Earth MOID = 0.0063 AU
Epoch 2013 Apr. 18.0 TT = JDT 2456400.5                 MPC
M 318.34416              (2000.0)            P               Q
n   0.54510170     Peri.   62.62010     +0.40670258     +0.91323208
a   1.4841724      Node   231.39916     -0.84885873     +0.36785014
e   0.3888269      Incl.    1.79636     -0.33768605     +0.17519543
P   1.81           H   26.8           G   0.15           U   7

MPEC 2013 - K21

Key to Orbital elements

The 11 - 25 metre wide asteroid 2013 KS1 will make a close pass (4.8 lunar distances, 0.0123 AU), travelling at 9.50 km/second, to the Earth-Moon system on the 22nd May, 2013 @ 11:39 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).