* Astronomy

Blobrana · L

RE: Asteroid 2009 WX51

Blobrana · L

The 240 - 540 metre wide asteroid 2009 WX51 will make a close pass (57.0 lunar distances, 0.1465 AU), travelling at 15.93 km/second, to the Earth-Moon system on the 25th December, 2009.

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

Blobrana · L

Removed as an Earth Impact Risk.

Blobrana · L

2009 WX51
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-6.63
Palermo Scale (cumulative)	-6.57
Impact Probability (cumulative)	7.5e-10
Number of Potential Impacts	2

V_impact	19.15 km/s
V_infinity	15.57 km/s
H	20.1
Diameter	0.326 km
Mass	4.6e+10 kg
Energy	2.0e+03 MT
all above are mean values weighted by impact probability

Analysis based on
46 observations spanning 6.9933 days
(2009-Nov-22.24934 to 2009-Nov-29.24263)

Blobrana · L

2009 WX51
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-6.64
Palermo Scale (cumulative)	-6.50
Impact Probability (cumulative)	1.0e-09
Number of Potential Impacts	3

V_impact	18.72 km/s
V_infinity	15.03 km/s
H	20.1
Diameter	0.322 km
Mass	4.5e+10 kg
Energy	1.9e+03 MT
all above are mean values weighted by impact probability

Analysis based on
44 observations spanning 6.9933 days
(2009-Nov-22.24934 to 2009-Nov-29.24263)

Blobrana · L

2009 WX51
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-5.32
Palermo Scale (cumulative)	-4.68
Impact Probability (cumulative)	5.8e-08
Number of Potential Impacts	21

V_impact	19.44 km/s
V_infinity	15.92 km/s
H	20.2
Diameter	0.309 km
Mass	4.1e+10 kg
Energy	1.9e+03 MT
all above are mean values weighted by impact probability

Analysis based on
29 observations spanning 3.0285 days
(2009-Nov-22.24934 to 2009-Nov-25.27786)

Blobrana · L

2009 WX51
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-4.58
Palermo Scale (cumulative)	-3.89
Impact Probability (cumulative)	2.0e-07
Number of Potential Impacts	143

V_impact	20.02 km/s
V_infinity	16.62 km/s
H	20.0
Diameter	0.332 km
Mass	5.0e+10 kg
Energy	2.4e+03 MT
all above are mean values weighted by impact probability

Analysis based on
23 observations spanning 1.3054 days
(2009-Nov-22.24934 to 2009-Nov-23.55478)

Blobrana · L

The 260 - 580 metre wide asteroid 2009 WX51 will make a close pass (58.3 lunar distances, 0.1498 AU), travelling at 15.63 km/second, to the Earth-Moon system on the 26th December, 2009.

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

Blobrana · L

Orbital elements:
2009 WX51                                           PHA, Earth MOID = 0.0156 AU
Epoch 2010 Jan. 4.0 TT = JDT 2455200.5                  MPC
M 354.89727              (2000.0)            P               Q
n   0.18618189     Peri.  117.02463     -0.85364522     -0.51283392
a   3.0374637      Node    32.35891     +0.39691489     -0.75369879
e   0.7340858      Incl.    9.79526     +0.33726608     -0.41102251
P   5.29           H   20.0           G   0.15           U   9

MPEC 2009 - W76