* Astronomy

Orbital elements:
2011 WJ15                                                Earth MOID = 0.0046 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5                 MPC
M 348.52264              (2000.0)            P               Q
n   0.27778755     Peri.  260.30689     +0.72880658     +0.64850543
a   2.3262740      Node    58.89973     -0.48315974     +0.71445721
e   0.7906843      Incl.   14.86934     -0.48517794     +0.26266253
P   3.55           H   25.2           G   0.15           U   7

MPEC 2011 - W39

The 24 - 54 metre wide asteroid 2011 WJ15 made a close pass (2.6 lunar distances, 0.0067 AU), travelling at 26.40 km/second, to the Earth-Moon system on the 20th November, 2011 @ 12:05 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).