* Astronomy

Orbital elements:
2011 WA                                             PHA, Earth MOID = 0.0499 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5                 MPC
M  32.71775              (2000.0)            P               Q
n   1.26933162     Peri.  206.25503     -0.25914978     +0.88029642
a   0.8447976      Node    51.55020     -0.77258620     +0.05797793
e   0.2864979      Incl.   30.49242     -0.57961363     -0.47086811
P   0.78           H   21.7           G   0.15           U   8

MPEC 2011 - W04

The 120 - 270 metre wide asteroid 2011 WA made a close pass (20.6 lunar distances, 0.0529 AU), travelling at 16.24 km/second, to the Earth-Moon system on the 12th November, 2011 @ 13:08 UT ±00:02.

See more

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