* Astronomy

Orbital elements:
2013 JR28                                           PHA, Earth MOID = 0.0346 AU
Epoch 2013 Apr. 18.0 TT = JDT 2456400.5                 MPC
M 328.62427              (2000.0)            P               Q
n   0.30034741     Peri.  228.67759     +0.89085899     +0.44091787
a   2.2082765      Node   104.89795     -0.37562499     +0.85034972
e   0.6496533      Incl.    6.49831     -0.25549194     +0.28722254
P   3.28           H   21.4           G   0.15           U   9

MPEC 2013 - J70

Key to Orbital elements

The 140 - 310 metre wide asteroid 2013 JR28 will make a close pass (13.7 lunar distances, 0.0353 AU), travelling at 16.82 km/second, to the Earth-Moon system on the 18th June, 2013 @ 14:57 UT ±07:24. 

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