* Astronomy

Orbital elements:
2013 GC55                                                Earth MOID = 0.0486 AU
Epoch 2013 Apr. 18.0 TT = JDT 2456400.5                 MPC
M 351.32939              (2000.0)            P               Q
n   0.47130075     Peri.  204.88288     -0.68363058     +0.72007701
a   1.6353246      Node    22.60867     -0.60710524     -0.47065552
e   0.3709937      Incl.   18.01689     -0.40505858     -0.50987497
P   2.09           H   24.3           G   0.15           U   7

MPEC 2013 - G50

Key to Orbital elements

The 37 - 84 metre wide asteroid 2013 GC55 will make a close pass (19.7 lunar distances, 0.0507 AU), travelling at 11.22 km/second, to the Earth-Moon system on the 16th April, 2013 @ 16:56 UT ±00:20. 

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