* Astronomy

Orbital elements:
2009 EM1                                                 Earth MOID = 0.1182 AU
Epoch 2013 Apr. 18.0 TT = JDT 2456400.5                 MPC
M   9.13522              (2000.0)            P               Q
n   0.24640875     Peri.  185.75710     -0.99255739     -0.10238678
a   2.5197955      Node   347.76334     +0.12041090     -0.74425230
e   0.5593756      Incl.   18.12339     +0.01819483     -0.66000414
P   4.00           H   22.9           G   0.15           U   1

MPEC 2013 - E24

Key to Orbital elements

The 70 - 160 metre wide asteroid 2009 EM1 will make a close pass (48.3 lunar distances, 0.1240 AU), travelling at 11.75 km/second, to the Earth-Moon system on the 8th March, 2013 @ 18:05 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).