* Astronomy

Orbital elements:
2013 DA                                                  Earth MOID = 0.0540 AU
Epoch 2013 Apr. 18.0 TT = JDT 2456400.5                 MPC
M  59.66460              (2000.0)            P               Q
n   0.58303506     Peri.  313.03542     -0.18732490     -0.96213055
a   1.4190780      Node   146.21107     +0.97255879     -0.20997729
e   0.3176802      Incl.   20.85933     +0.13798108     +0.17382272
P   1.69           H   23.9           G   0.15           U   7

MPEC 2013 - D12

Key to Orbital elements

The 44 - 99 metre wide asteroid 2013 DA made a close pass (22.9 lunar distances, 0.0589 AU), travelling at 13.06 km/second, to the Earth-Moon system on the 12th February, 2013 @ 11:18 UT ±00:23. 

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