* Astronomy

Orbital elements:
2013 ES                                                  Earth MOID = 0.0266 AU
Epoch 2013 Apr. 18.0 TT = JDT 2456400.5                 MPC
M  11.93147              (2000.0)            P               Q
n   0.21906318     Peri.  342.06246     -0.88337666     -0.46852971
a   2.7253553      Node   169.97635     +0.43749334     -0.83296330
e   0.6288361      Incl.    3.69164     +0.16806325     -0.29436722
P   4.50           H   25.6           G   0.15           U   7

MPEC 2013 - E13

Key to Orbital elements

The 20 - 46 metre wide asteroid 2013 ES made a close pass (10.6 lunar distances, 0.0273 AU), travelling at 8.11 km/second, to the Earth-Moon system on the 1st March, 2013 @ 17:19 UT ±00:04. 

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