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Post Info TOPIC: Asteroid 2008 ST7
Blobrana


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RE: Asteroid 2008 ST7
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Object: 2008ST7   

     date         MJD       sigma sigimp   dist ±   width    stretch    p_RE    exp. en.    PS  
   YYYY/MM                                 (RE)       (RE)      RE/sig               MT           
--------------------------------------------------------------------------------------------------
2074/09/09.991  78824.991  -1.890 0.000    0.39 ±    0.000  1.54E+07  1.26E-08  6.28E-08  -7.64
2074/09/10.021  78825.021   0.793 0.000    0.74 ±    0.000  2.87E+06  2.64E-07  1.33E-06  -6.31
2079/09/10.303  80651.303   0.807 0.000    1.30 ±    0.000  1.47E+07  2.91E-08  1.46E-07  -7.30
2080/09/09.436  81016.436   0.800 0.000    0.45 ±    0.000  2.10E+07  3.95E-08  1.98E-07  -7.18
2086/09/10.259  83208.259   0.700 0.000    0.83 ±    0.000  1.02E+07  8.08E-08  4.07E-07  -6.90
2089/09/09.654  84303.654   1.011 1.494    1.52 ±    0.010  4.15E+05  7.93E-09  3.98E-08  -7.93


Based on  120 optical observations (of which   6 are rejected as outliers)
from 2008/09/24.301 to 2008/10/30.360.



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Blobrana


L

Posts: 131433
Date:
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Object: 2008ST7   

     date         MJD       sigma sigimp   dist ±   width    stretch    p_RE    exp. en.    PS  
   YYYY/MM                                 (RE)       (RE)      RE/sig               MT           
--------------------------------------------------------------------------------------------------
2074/09/10.020  78825.020   0.823 0.000    0.75 ±    0.000  5.08E+06  1.45E-07  7.03E-07  -6.59
2085/09/09.856  82842.856   0.773 0.000    0.96 ±    0.000  9.27E+07  7.32E-09  3.55E-08  -7.95
2089/09/09.653  84303.653   0.945 0.680    1.51 ±    0.014  7.40E+05  2.43E-08  1.18E-07  -7.45


Based on  110 optical observations (of which   6 are rejected as outliers)
from 2008/09/24.301 to 2008/10/26.429.
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Blobrana


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Posts: 131433
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2008 ST7
Earth Impact Risk Summary
Torino Scale (maximum) 0
Palermo Scale (maximum) -4.50
Palermo Scale (cumulative) -4.20
Impact Probability (cumulative) 5.1e-05
Number of Potential Impacts 33
Vimpact 14.93 km/s
Vinfinity 9.93 km/s
H 24.1
Diameter 0.051 km
Mass 1.8e+08 kg
Energy 4.8e+00 MT
all above are mean values
weighted by impact probability
Analysis based on
99 observations spanning 17.915 days
(2008-Sep-24.29993 to 2008 -Oct-12.21517)


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Blobrana


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UPDATE: Object: 2008ST7   

     date         MJD       sigma sigimp   dist +/-   width    stretch    p_RE    exp. en.    PS  
   YYYY/MM                                 (RE)       (RE)      RE/sig               MT           
--------------------------------------------------------------------------------------------------
2062/09/09.905  74441.905   2.050 0.000    0.30 +/-    0.000  6.98E+06  2.05E-08  1.01E-07  -7.35
2068/09/09.415  76633.415  -2.562 0.000    0.90 +/-    0.000  6.59E+06  5.45E-09  2.58E-08  -7.98
2073/09/09.710  78459.710   2.066 0.000    0.89 +/-    0.017  3.39E+05  3.96E-07  1.94E-06  -6.14
2073/09/09.698  78459.698   2.809 0.000    0.53 +/-    0.017  2.28E+05  1.01E-07  4.98E-07  -6.73
2074/09/10.158  78825.158   2.945 0.000    1.00 +/-    0.000  3.94E+07  3.10E-10  1.53E-09  -9.25
2074/09/10.021  78825.021   0.460 0.000    0.74 +/-    0.000  1.37E+07  6.80E-08  3.30E-07  -6.92
2079/09/10.220  80651.220  -2.572 0.000    0.96 +/-    0.045  3.38E+06  1.28E-08  6.05E-08  -7.68
2082/09/09.855  81746.855  -0.580 0.000    0.52 +/-    0.000  1.18E+08  8.15E-09  3.91E-08  -7.89
2082/09/09.766  81746.766   2.917 0.000    0.90 +/-    0.000  4.89E+07  2.77E-10  1.36E-09  -9.35
2085/09/09.820  82842.820  -2.701 0.000    0.87 +/-    0.000  2.19E+06  1.22E-08  5.79E-08  -7.74
2089/09/09.435  84303.435  -2.603 0.000    1.30 +/-    0.000  9.60E+06  2.14E-09  1.00E-08  -8.52
2089/09/09.654  84303.654   0.505 0.535    1.51 +/-    0.022  1.99E+06  1.96E-08  9.46E-08  -7.55
2089/09/09.531  84303.531   2.035 0.000    0.16 +/-    0.000  1.59E+07  9.44E-09  4.61E-08  -7.86


Based on  105 optical observations (of which   6 are rejected as outliers)
from 2008/09/24.301 to 2008/10/12.216.


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Blobrana


L

Posts: 131433
Date:
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UPDATE: Object: 2008ST7   

     date         MJD       sigma sigimp   dist +/-   width    stretch    p_RE    exp. en.    PS  
   YYYY/MM                                 (RE)       (RE)      RE/sig               MT           
--------------------------------------------------------------------------------------------------
2068/09/09.416  76633.416  -2.038 0.000    0.89 +/-    0.000  9.20E+06  1.31E-08  6.47E-08  -7.58
2073/09/09.712  78459.712   1.275 0.000    0.53 +/-    0.022  4.75E+05  1.06E-06  5.43E-06  -5.70
2073/09/09.707  78459.707   1.806 0.000    1.32 +/-    0.023  3.19E+05  7.27E-07  3.74E-06  -5.86
2079/09/10.212  80651.212  -2.045 0.000    0.23 +/-    0.000  4.73E+06  3.09E-08  1.52E-07  -7.28
2079/09/10.093  80651.093   1.913 0.000    0.92 +/-    0.000  4.69E+06  3.24E-08  1.67E-07  -7.25
2082/09/09.857  81746.857  -0.617 0.000    0.55 +/-    0.000  1.65E+08  5.70E-09  2.84E-08  -8.03
2085/09/09.818  82842.818  -2.137 0.000    0.78 +/-    0.000  3.06E+06  3.41E-08  1.68E-07  -7.28
2089/09/09.701  84303.701  -2.018 0.000    0.90 +/-    0.045  3.44E+06  3.66E-08  1.80E-07  -7.27
2089/09/09.550  84303.550   1.225 0.000    0.68 +/-    0.000  4.40E+06  1.15E-07  5.86E-07  -6.76


Based on   91 optical observations (of which   6 are rejected as outliers)
from 2008/09/24.301 to 2008/10/08.040.


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Blobrana


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Posts: 131433
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Absolute Magnitude (H) 24.09
Slope parameter (G) 0.15
Perihelion (AU) 0.9398
Aphelion (AU) 2.9293
Asc. node-Earth sep. (AU) 0.00674
Desc. node-Earth sep. (AU) 1.38962
Earth MOID (AU) 0.00118
Orbital period (days) 982.801
Date of orbit computation Oct 7 09:11

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