* Astronomy

Blobrana · L

RE: Asteroid 2009AL

Blobrana · L

2009AL - impactor table

Object: 2009AL    

     date         MJD       sigma sigimp   dist ±   width    stretch    p_RE    exp. en.    PS  
   YYYY/MM                                 (RE)       (RE)      RE/sig               MT           
--------------------------------------------------------------------------------------------------
2090/05/01.477  84537.477   2.376 0.000    1.20 ±    0.052  6.33E+05  6.77E-08  9.76E-06  -5.83

Based on   50 optical observations (of which   0 are rejected as outliers)
from 2009/01/01.300 to 2009/01/25.132.

Source

2009 AL
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-5.89
Palermo Scale (cumulative)	-5.89
Impact Probability (cumulative)	5.9e-08
Number of Potential Impacts	1

V_impact	16.57 km/s
V_infinity	12.27 km/s
H	21.8
Diameter	0.150 km
Mass	4.4e+09 kg
Energy	1.4e+02 MT
all above are mean values weighted by impact probability

Analysis based on
50 observations spanning 23.832 days
(2009-Jan-01.29931 to 2009-Jan-25.13085)

Source

Blobrana · L

2009AL - impactor table

Object: 2009AL    

     date         MJD       sigma sigimp   dist ±   width    stretch    p_RE    exp. en.    PS  
   YYYY/MM                                 (RE)       (RE)      RE/sig               MT           
--------------------------------------------------------------------------------------------------
2090/05/01.492  84537.492   1.635 0.000    1.16 ±    0.134  2.18E+06  6.17E-08  9.18E-06  -5.86

Based on   44 optical observations (of which   0 are rejected as outliers)
from 2009/01/01.300 to 2009/01/18.138.

Source

Blobrana · L

2009AL - impactor table

Object: 2009AL    

     date         MJD       sigma sigimp   dist ±   width    stretch    p_RE    exp. en.    PS  
   YYYY/MM                                 (RE)       (RE)      RE/sig               MT           
--------------------------------------------------------------------------------------------------
2057/04/29.637  72482.637   0.804 2.085    2.17 ±    0.386  1.02E+05  5.46E-08  1.09E-05  -5.58
2090/05/01.512  84537.512   1.138 0.178    1.40 ±    0.241  3.34E+06  3.27E-08  6.66E-06  -6.03

Based on   38 optical observations (of which   0 are rejected as outliers)
from 2009/01/01.300 to 2009/01/16.186.

Source