* Astronomy

Blobrana · L

RE: Asteroid 2009 UW18

Blobrana · L

Orbital elements:
2009 UW18                                                Earth MOID = 0.1071 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5                 MPC
M 161.73145              (2000.0)            P               Q
n   0.68145227     Peri.   59.76313     +0.26555721     +0.93987853
a   1.2789270      Node   227.29056     -0.95409810     +0.22421131
e   0.4388767      Incl.   16.99115     -0.13847812     +0.25759976
P   1.45           H   19.6           G   0.15           U   4

MPEC 2011 - N10

Blobrana · L

2009 UW18
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-4.62
Palermo Scale (cumulative)	-4.49
Impact Probability (cumulative)	4.0e-09
Number of Potential Impacts	19

V_impact	19.83 km/s
V_infinity	16.41 km/s
H	19.3
Diameter	0.459 km
Mass	1.3e+11 kg
Energy	6.2e+03 MT
all above are mean values weighted by impact probability

Analysis based on
15 observations spanning 1.0774 days
(2009-Oct-23.34501 to 2009-Oct-24.42245)

Blobrana · L

Orbital elements:
2009 UW18                                                Earth MOID = 0.1392 AU
Epoch 2009 Oct. 16.0 TT = JDT 2455120.5                 MPC
M  66.11143              (2000.0)            P               Q
n   0.74020749     Peri.   54.99161     +0.18222970     +0.95991131
a   1.2103205      Node   227.02430     -0.97003776     +0.14011294
e   0.4181939      Incl.   16.92413     -0.16068314     +0.24277283
P   1.33           H   19.5           G   0.15
From 15 observations 2009 Oct. 23-24.

MPEC 2009 - U75