* Astronomy

Orbital elements:

2011 ES4                                                 Earth MOID = 0.0001 AU
Epoch 2011 Feb. 8.0 TT = JDT 2455600.5                  MPC
M 274.96824              (2000.0)            P               Q
n   0.86656753     Peri.  273.50620     -0.28173411     +0.95928064
a   1.0896017      Node   340.09445     -0.85513242     -0.26056646
e   0.2426418      Incl.    3.39510     -0.43517172     -0.10902190
P   1.14           H   25.6           G   0.15           U   8

MPEC 2011 - E13

The 20 - 45 metre wide asteroid 2011 ES4 will make a close pass (11.2 lunar distances, 0.0287 AU), travelling at 6.97 km/second, to the Earth-Moon system on the 13th March, 2011 @ 10:08 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).