* Astronomy

Orbital elements:
2011 YX15                                                Earth MOID = 0.0176 AU
Epoch 2012 Mar. 14.0 TT = JDT 2456000.5                 MPC
M 103.02737              (2000.0)            P               Q
n   0.82366821     Peri.  125.14113     +0.71310141     -0.66564629
a   1.1271140      Node   277.69315     +0.54905967     +0.72540391
e   0.1630629      Incl.   12.82661     +0.43591268     +0.17522610
P   1.20           H   25.4           G   0.15           U   6

MPEC 2011 - Y48

The 22 - 49 metre wide asteroid 2011 YX15 made a close pass (8.3 lunar distances, 0.0213 AU), travelling at 7.73 km/second, to the Earth-Moon system on the 27th December, 2011 @ 06:51 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).