* Astronomy

Orbital elements:
2011 YB63                                                Earth MOID = 0.0017 AU
Epoch 2012 Mar. 14.0 TT = JDT 2456000.5                 MPC
M  18.05600              (2000.0)            P               Q
n   0.35529000     Peri.  210.23295     -0.61438679     -0.78853587
a   1.9743041      Node   277.68808     +0.72928489     -0.55438731
e   0.5201279      Incl.    1.57301     +0.30111864     -0.26620647
P   2.77           H   29.8           G   0.15           U   7

MPEC 2012 - A13

The 3 - 6.5 metre wide asteroid 2011 YB63 made a close pass (0.6 lunar distances, 0.0016 AU), travelling at 8.53 km/second, to the Earth-Moon system on the 2nd January, 2012 @ 10:14 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).