* Astronomy

Blobrana · L

RE: Asteroid 2009 XT6

Blobrana · L

2009 XT6
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-3.76
Palermo Scale (cumulative)	-3.76
Impact Probability (cumulative)	4.7e-07
Number of Potential Impacts	2

V_impact	25.81 km/s
V_infinity	23.28 km/s
H	20.1
Diameter	0.320 km
Mass	4.4e+10 kg
Energy	3.5e+03 MT
all above are mean values weighted by impact probability

Analysis based on
67 observations spanning 5.9744 days
(2009-Dec-13.4056 to 2009-Dec-19.38005)

Blobrana · L

2009 XT6
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-4.04
Palermo Scale (cumulative)	-4.04
Impact Probability (cumulative)	2.4e-07
Number of Potential Impacts	2

V_impact	25.81 km/s
V_infinity	23.28 km/s
H	20.1
Diameter	0.320 km
Mass	4.5e+10 kg
Energy	3.6e+03 MT
all above are mean values weighted by impact probability

Analysis based on
64 observations spanning 5.0222 days
(2009-Dec-13.4056 to 2009-Dec-18.4278)

Blobrana · L

2009 XT6
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-3.48
Palermo Scale (cumulative)	-3.42
Impact Probability (cumulative)	8.7e-07
Number of Potential Impacts	2

V_impact	25.80 km/s
V_infinity	23.27 km/s
H	20.0
Diameter	0.330 km
Mass	5.0e+10 kg
Energy	4.0e+03 MT
all above are mean values weighted by impact probability

Analysis based on
53 observations spanning 4.0204 days
(2009-Dec-13.4056 to 2009-Dec-17.42598)

Blobrana · L

2009 XT6
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-3.70
Palermo Scale (cumulative)	-3.62
Impact Probability (cumulative)	5.5e-07
Number of Potential Impacts	2

V_impact	25.80 km/s
V_infinity	23.28 km/s
H	20.1
Diameter	0.329 km
Mass	4.9e+10 kg
Energy	3.9e+03 MT
all above are mean values weighted by impact probability

Analysis based on
44 observations spanning 3.1390 days
(2009-Dec-13.4056 to 2009-Dec-16.54458)

Blobrana · L

2009 XT6
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-2.83
Palermo Scale (cumulative)	-2.76
Impact Probability (cumulative)	2.1e-06
Number of Potential Impacts	4

V_impact	25.74 km/s
V_infinity	23.20 km/s
H	20.0
Diameter	0.343 km
Mass	5.5e+10 kg
Energy	4.4e+03 MT
all above are mean values weighted by impact probability

Analysis based on
29 observations spanning 2.1212 days
(2009-Dec-13.4056 to 2009-Dec-15.52682)

Blobrana · L

2009 XT6
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-3.18
Palermo Scale (cumulative)	-2.68
Impact Probability (cumulative)	1.9e-06
Number of Potential Impacts	85

V_impact	25.79 km/s
V_infinity	23.25 km/s
H	19.8
Diameter	0.362 km
Mass	6.6e+10 kg
Energy	5.3e+03 MT
all above are mean values weighted by impact probability

Analysis based on
9 observations spanning 1.0499 days
(2009-Dec-13.4056 to 2009-Dec-14.4555)

Blobrana · L

The 300 - 670 metre wide asteroid 2009 XT6 made a close pass (59.4 lunar distances, 0.1527 AU), travelling at 19.86 km/second, to the Earth-Moon system on the 7th 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 XT6                                            PHA, Earth MOID = 0.0030 AU
Epoch 2010 Jan. 4.0 TT = JDT 2455200.5                  MPC
M  22.89226              (2000.0)            P               Q
n   0.31527129     Peri.   80.70466     +0.96593233     +0.23847688
a   2.1380266      Node   265.45025     -0.25876790     +0.88440710
e   0.7656662      Incl.    5.78720     -0.00372982     +0.40118931
P   3.13           H   19.7           G   0.15           U   9

MPEC 2009 - X55