* Astronomy

Orbital elements:
2010 YR                                                  Earth MOID = 0.0144 AU
Epoch 2011 Feb. 8.0 TT = JDT 2455600.5                  MPC
M 314.12162              (2000.0)            P               Q
n   1.03374684     Peri.  290.84242     -0.85460560     +0.42820437
a   0.9687088      Node   275.51556     -0.29396165     -0.86526367
e   0.1997327      Incl.   17.16464     -0.42806052     -0.26069099
P   0.95           H   23.6           G   0.15           U   8

MPEC 2010 - Y35

The 50 - 110 metre wide asteroid 2010 YR made a close pass (11.4 lunar distances, 0.0293 AU), travelling at 10.25 km/second, to the Earth-Moon system on the 29th December, 2010 @ 06:45 UT ±00:29.

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