* Astronomy

Orbital elements:
2012 HN40                                                Earth MOID = 0.0637 AU
Epoch 2012 Mar. 14.0 TT = JDT 2456000.5                 MPC
M 331.63764              (2000.0)            P               Q
n   0.22166914     Peri.  242.88035     +0.57649027     +0.78389246
a   2.7039535      Node    64.22009     -0.62926013     +0.60593674
e   0.6700433      Incl.   14.83739     -0.52123955     +0.13547427
P   4.45           H   20.2           G   0.15           U   5

MPEC 2012 - J34

The 220 - 500 metre wide asteroid 2012 HN40 will make a close pass (46.0 lunar distances, 0.1182 AU), travelling at 13.79 km/second, to the Earth-Moon system on the 15th June, 2012 @ 20:53 UT ±00:09. 

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