* Astronomy

Update:
The 160 - 350 metre wide asteroid 2009 WJ1 will make a close pass (67.9 Lunar Distances, 0.1745 AU), travelling at 12.54 km/s, to the Earth-Moon system on the 3rd January, 2010.

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

-- Edited by Blobrana on Saturday 12th of December 2009 01:32:11 AM

2009 WJ1 Earth Impact Risk Summary
Torino Scale (maximum) 0 Palermo Scale (maximum) -5.67 Palermo Scale (cumulative) -5.44 Impact Probability (cumulative) 5.9e-08 Number of Potential Impacts 3	Vimpact 17.25 km/s Vinfinity 13.14 km/s H 21.1 Diameter 0.204 km Mass 1.2e+10 kg Energy 4.3e+02 MT all above are mean values weighted by impact probability
Analysis based on 43 observations spanning 6.9598 days (2009-Nov-17.10881 to 2009-Nov-24.06865)

2009 WJ1 Earth Impact Risk Summary
Torino Scale (maximum) 0 Palermo Scale (maximum) -7.13 Palermo Scale (cumulative) -7.09 Impact Probability (cumulative) 1.2e-09 Number of Potential Impacts 2	Vimpact 19.54 km/s Vinfinity 16.05 km/s H 21.0 Diameter 0.210 km Mass 1.3e+10 kg Energy 6.1e+02 MT all above are mean values weighted by impact probability
Analysis based on 34 observations spanning 4.9672 days (2009-Nov-17.10881 to 2009-Nov-22.07604)

2009 WJ1 Earth Impact Risk Summary
Torino Scale (maximum) 0 Palermo Scale (maximum) -6.65 Palermo Scale (cumulative) -6.20 Impact Probability (cumulative) 1.1e-08 Number of Potential Impacts 8	Vimpact 18.59 km/s Vinfinity 14.85 km/s H 21.1 Diameter 0.208 km Mass 1.2e+10 kg Energy 4.9e+02 MT all above are mean values weighted by impact probability
Analysis based on 25 observations spanning 2.0310 days (2009-Nov-17.10881 to 2009-Nov-19.13986)