* Astronomy

Orbital elements:
2013 LM31                                           PHA, Earth MOID = 0.0037 AU
Epoch 2013 Apr. 18.0 TT = JDT 2456400.5                 MPC
M 322.30670              (2000.0)            P               Q
n   0.27471396     Peri.  251.34030     +0.99476444     +0.09760162
a   2.3435932      Node   103.04994     -0.07806199     +0.91701344
e   0.6653635      Incl.    1.78193     -0.06595483     +0.38673024
P   3.59           H   20.0           G   0.15           U   7

MPEC 2013 - M07

Key to Orbital elements

The 250 - 570 metre wide asteroid 2013 LM31 will make a close pass (55.7 lunar distances, 0.1431 AU), travelling at 12.69 km/second, to the Earth-Moon system on the 2nd August, 2013 @ 05:08 UT ±02:27. 

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