* Astronomy

Blobrana · L

RE: Asteroid 2009 WM1

Blobrana · L

2009 WM1
Earth Impact Risk Summary

Torino Scale (maximum)	1
Palermo Scale (maximum)	-1.33
Palermo Scale (cumulative)	-1.05
Impact Probability (cumulative)	1.5e-04
Number of Potential Impacts	103

V_impact	18.10 km/s
V_infinity	14.27 km/s
H	20.4
Diameter	0.280 km
Mass	3.1e+10 kg
Energy	1.2e+03 MT
all above are mean values weighted by impact probability

Analysis based on
46 observations spanning 5.0667 days
(2009-Nov-17.4641 to 2009-Nov-22.53083)

Blobrana · L

2009 WM1
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-2.12
Palermo Scale (cumulative)	-1.69
Impact Probability (cumulative)	4.9e-05
Number of Potential Impacts	87

V_impact	18.12 km/s
V_infinity	14.29 km/s
H	20.5
Diameter	0.272 km
Mass	2.8e+10 kg
Energy	1.1e+03 MT
all above are mean values weighted by impact probability

Analysis based on
33 observations spanning 4.0254 days
(2009-Nov-17.4641 to 2009-Nov-21.4895)

Blobrana · L

2009 WM1
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-2.47
Palermo Scale (cumulative)	-1.99
Impact Probability (cumulative)	3.0e-05
Number of Potential Impacts	94

V_impact	18.11 km/s
V_infinity	14.28 km/s
H	20.5
Diameter	0.272 km
Mass	2.8e+10 kg
Energy	1.1e+03 MT
all above are mean values weighted by impact probability

Analysis based on
30 observations spanning 3.0170 days
(2009-Nov-17.4641 to 2009-Nov-20.48107)

Blobrana · L

2009 WM1
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-2.24
Palermo Scale (cumulative)	-1.84
Impact Probability (cumulative)	3.6e-05
Number of Potential Impacts	148

V_impact	18.13 km/s
V_infinity	14.30 km/s
H	20.4
Diameter	0.277 km
Mass	2.9e+10 kg
Energy	1.1e+03 MT
all above are mean values weighted by impact probability

Analysis based on
27 observations spanning 2.0177 days
(2009-Nov-17.4641 to 2009-Nov-19.48183)

Blobrana · L

2009 WM1
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-2.41
Palermo Scale (cumulative)	-1.65
Impact Probability (cumulative)	5.1e-05
Number of Potential Impacts	989

V_impact	18.32 km/s
V_infinity	14.54 km/s
H	20.4
Diameter	0.280 km
Mass	3.0e+10 kg
Energy	1.2e+03 MT
all above are mean values weighted by impact probability

Analysis based on
25 observations spanning 1.0411 days
(2009-Nov-17.4641 to 2009-Nov-18.50524)

Blobrana · L

Orbital elements:
2009 WM1                                            PHA, Earth MOID = 0.0008 AU
Epoch 2010 Jan. 4.0 TT = JDT 2455200.5                  MPC
M  49.84341              (2000.0)            P               Q
n   0.74538592     Peri.  163.60933     +0.69185486     -0.60991002
a   1.2047084      Node   240.55222     +0.60260159     +0.78258974
e   0.1851285      Incl.   26.34593     +0.39775392     -0.12475203
P   1.32           H   20.4           G   0.15           U   8

MPEC 2009 - W30

The 220 - 490 metre wide asteroid 2009 WM1 made a close pass (66.5 Lunar Distances, 0.1709 AU), travelling at 14.89 km/s, to the Earth-Moon system on the 14th 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).