* Astronomy

Orbital elements:
2010 YS                                             PHA, Earth MOID = 0.0113 AU
Epoch 2011 Feb. 8.0 TT = JDT 2455600.5                  MPC
M  18.15424              (2000.0)            P               Q
n   0.27090209     Peri.  324.97497     +0.43028811     -0.87785641
a   2.3655265      Node    98.71203     +0.86916042     +0.34000338
e   0.6060416      Incl.   12.28302     +0.24374641     +0.33729191
P   3.64           H   22.0           G   0.15           U   6

MPEC 2010 - Y36

The 100 - 230 metre wide asteroid 2010 YS made a close pass (7.2 lunar distances, 0.0185 AU), travelling at 12.24 km/second, to the Earth-Moon system on the 26th December, 2010 @ 13:42 UT ±00:02.

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