* Astronomy

Orbital elements:
2011 ET4                                                 Earth MOID = 0.1809 AU
Epoch 2011 Feb. 8.0 TT = JDT 2455600.5                  MPC
M   2.68404              (2000.0)            P               Q
n   0.47283683     Peri.  149.75132     -0.75257634     -0.64883133
a   1.6317809      Node   347.67763     +0.44731051     -0.37837178
e   0.3011313      Incl.   31.79976     +0.48326201     -0.66019142
P   2.08           H   21.0           G   0.15           U   8

MPEC 2011 - E14

The 180 - 390 metre wide asteroid 2011 ET4 will make a close pass (71.9 lunar distances, 0.1847 AU), travelling at 16.89 km/second, to the Earth-Moon system on the 5th March, 2011 @ 12:35 UT ±03:45.

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