* Astronomy

Blobrana · L

RE: Asteroid 2009 WF

Blobrana · L

Orbital elements:
2009 WF                                                  Earth MOID = 0.0775 AU
Epoch 2010 Jan. 4.0 TT = JDT 2455200.5                  MPC
M  77.31213              (2000.0)            P               Q
n   0.63393546     Peri.   74.82335     +0.91661976     +0.28229047
a   1.3420623      Node   268.13883     -0.37637091     +0.84804266
e   0.3085649      Incl.   16.45157     +0.13473366     +0.44848158
P   1.55           H   19.8           G   0.15           U   8

MPEC 2009 - W13

2009 WF
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-4.92
Palermo Scale (cumulative)	-4.17
Impact Probability (cumulative)	1.1e-07
Number of Potential Impacts	40

V_impact	16.04 km/s
V_infinity	11.54 km/s
H	19.8
Diameter	0.370 km
Mass	6.7e+10 kg
Energy	2.0e+03 MT
all above are mean values weighted by impact probability

Analysis based on
17 observations spanning .62765 days
(2009-Nov-16.31234 to 2009-Nov-16.93999)