* Astronomy

Orbital elements:
2009 WB                                                  Earth MOID = 0.0339 AU
Epoch 2010 Jan. 4.0 TT = JDT 2455200.5                  MPC
M  35.37555              (2000.0)            P               Q
n   0.53725180     Peri.  336.36935     +0.82481911     -0.54282476
a   1.4985945      Node    57.44756     +0.54404896     +0.68584964
e   0.3292296      Incl.   10.81501     +0.15389659     +0.48471802
P   1.83           H   24.2           G   0.15           U   9

MPEC 2009 - W07

The 38 - 86 metre wide asteroid 2009 WB will make a close pass (14.3 Lunar Distances, 0.0367 AU), travelling at 7.93 km/s, to the Earth-Moon system on the 17th November, 2009.

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

2009 WB Earth Impact Risk Summary
Torino Scale (maximum) 0 Palermo Scale (maximum) -9.16 Palermo Scale (cumulative) -9.16 Impact Probability (cumulative) 1.4e-10 Number of Potential Impacts 1	Vimpact 17.97 km/s Vinfinity 14.10 km/s H 23.1 Diameter 0.080 km Mass 6.9e+08 kg Energy 2.6e+01 MT all above are mean values weighted by impact probability
Analysis based on 13 observations spanning .13480 days (2009-Nov-16.21331 to 2009-Nov-16.34811)