Orbit Fit and Astrometric record for 08SO266

The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.

# Object: 08SO266   
# Created Tue Oct 24 01:37:46 2017
# Orbit generated from Bernstein formalism
# Fitting   64 observations of   66
# Arc:   8.00y
# First observation: 2008/09/24
#  Last observation: 2016/09/25
Preliminary a, adot, b, bdot, g, gdot:
   0.000632   0.037229  -0.000126  -0.010084   0.032655   0.000000
# Chi-squared of fit:   164.96 DOF:  122 RMS:  0.28
# Min/Max residuals:    -0.87    0.79
# Exact a, adot, b, bdot, g, gdot:
  1.583666E-05  3.816969E-02 -4.455624E-06 -1.031898E-02  3.265416E-02  6.012744E-03
# Covariance matrix:
  1.1398E-13 -4.6433E-14 -9.2966E-15  9.0216E-15  3.2880E-14 -1.2343E-13
 -4.6433E-14  4.3841E-14  9.5963E-15 -1.1143E-14  6.9870E-15  1.5411E-13
 -9.2966E-15  9.5963E-15  7.2222E-14 -1.5349E-14 -1.4349E-15  3.6232E-14
  9.0216E-15 -1.1143E-14 -1.5349E-14  6.5834E-15 -2.6335E-15 -4.2668E-14
  3.2880E-14  6.9870E-15 -1.4349E-15 -2.6335E-15  9.5085E-14  3.9681E-14
 -1.2343E-13  1.5411E-13  3.6232E-14 -4.2668E-14  3.9681E-14  5.9056E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
  -11.488368   14.486147    0.218779   -0.194657   -0.957920  2454733.906584
# Heliocentric elements and errors
Epoch:              2454730.5000  =  2008/09/21
Mean Anomaly:           26.95011 +/-     0.004
Argument of Peri:      172.70841 +/-     0.005
Long of Asc Node:      158.71005 +/-     0.000
Inclination:            18.78239 +/-     0.000
Eccentricity:         0.24542917 +/-    0.0000
Semi-Major Axis:     39.52658460 +/-    0.0021
Time of Perihelion: 2447935.4854 +/-       0.7
Perihelion:          29.82560765 +/-    0.0021
Aphelion:            49.22756155 +/-    0.0030
Period (y)              248.5090 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.05888367 +/-    0.0003
Ecliptic Y            7.53537713 +/-    0.0001
Ecliptic Z           -6.09946959 +/-    0.0001
Ecliptic XDOT        -0.00048295 +/-    0.0000
Ecliptic YDOT         0.00318109 +/-    0.0000
Ecliptic ZDOT        -0.00094837 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.58357049 +/-    0.0003
Geocenter to KBO     30.62397374 +/-    0.0003
# Hcoef:  6.34

The following table shows the complete astrometric record for 08SO266. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (08SO266) followed by the observatory code and reference code for the source of the astrometry.

2008 09  24.40583  01 11 05.45   -04 53 20.3   21.6R 08SO266   675  C~02Ms      
2008 09  24.44737  01 11 05.25   -04 53 22.0   21.4R 08SO266   675  C~02Ms      
2008 09  25.29369  01 11 00.70   -04 54 00.8   21.4R 08SO266   675  C~02Ms      
2008 09  25.33506  01 11 00.49   -04 54 02.2   21.5R 08SO266   675  C~02Ms      
2008 10  20.01122  01 08 41.51   -05 10 53.5         08SO266   807  C~02Ms      
2008 10  20.11786  01 08 40.89   -05 10 57.6         08SO266   807  C~02Ms      
2008 11  20.284684 01 06 06.30   -05 24 03.7   21.1V 08SO266   645  C~2KuK      
2008 11  20.285513 01 06 06.30   -05 24 03.7   20.8V 08SO266   645  C~2KuK      
2008 11  20.288001 01 06 06.29   -05 24 03.7   22.3V 08SO266   645  C~2KuK      
2008 11  30.05142  01 05 31.92   -05 25 33.6         08SO266   807  C~02Ms      
2008 11  30.19469  01 05 31.49   -05 25 34.4         08SO266   807  C~02Ms      
2008 12  22.175023 01 04 50.54   -05 23 55.1   21.1V 08SO266   645  C~1S74      
2008 12  22.175852 01 04 50.54   -05 23 55.1   20.6V 08SO266   645  C~1S74      
2008 12  22.178340 01 04 50.53   -05 23 55.1   22.2V 08SO266   645  C~1S74      
2009 08  18.34411  01 22 33.51   -04 07 31.5         08SO266   675  C~08Up      
2009 08  18.39900  01 22 33.38   -04 07 33.3         08SO266   675  C~08Up      
2009 08  18.45398  01 22 33.27   -04 07 35.9         08SO266   675  C~08Up      
2009 08  21.43102  01 22 25.53   -04 09 38.3         08SO266   675  C~08Up      
2009 10  18.24959  01 17 51.54   -04 51 32.8         08SO266   568  C~0Abd      
2009 10  18.27170  01 17 51.41   -04 51 33.6         08SO266   568  C~0Abd      
2010 10  08.05132  01 27 43.246  -04 26 15.93  20.8R 08SO266   809  C~0NmC      
2010 10  08.05388  01 27 43.223  -04 26 15.61  20.6R 08SO266   809  C~0NmC      
2010 10  08.13554  01 27 42.735  -04 26 19.50  21.0R 08SO266   809  C~0NmC      
2010 10  08.13810  01 27 42.748  -04 26 18.92  20.2R 08SO266   809  C~0NmC      
2010 10  08.21853  01 27 42.296  -04 26 22.81  20.7R 08SO266   809  C~0NmC      
2010 10  08.22109  01 27 42.269  -04 26 22.59  20.5R 08SO266   809  C~0NmC      
2010 10  31.36836  01 25 31.980  -04 40 19.73  21.2w 08SO266   F51  C~1vVv      
2010 10  31.38237  01 25 31.899  -04 40 20.12  21.4w 08SO266   F51  C~1vVv      
2010 10  31.39761  01 25 31.809  -04 40 20.65  21.3w 08SO266   F51  C~1vVv      
2010 10  31.41164  01 25 31.737  -04 40 21.01  21.4w 08SO266   F51  C~1vVv      
2011 09  25.46689  01 37 37.113  -03 58 29.33  21.5w 08SO266   F51  C~1vVv      
2011 09  25.47954  01 37 37.041  -03 58 29.94  21.3w 08SO266   F51  C~1vVv      
2011 09  25.49220  01 37 36.974  -03 58 30.55  21.3w 08SO266   F51  C~1vVv      
2011 09  25.50483  01 37 36.909  -03 58 31.08  21.3w 08SO266   F51  C~1vVv      
2012 11  16.34471  01 41 29.280  -04 10 03.31  21.5w 08SO266   F51  C~1vVv      
2012 11  16.35854  01 41 29.211  -04 10 03.67  21.5w 08SO266   F51  C~1vVv      
2012 11  16.37235  01 41 29.142  -04 10 03.83  21.3w 08SO266   F51  C~1vVv      
2013 09  14.49667  01 55 30.713  -03 13 40.59  21.3w 08SO266   F51  C~1vVv      
2013 09  14.51131  01 55 30.645  -03 13 41.36  21.1w 08SO266   F51  C~1vVv      
2013 09  14.54058  01 55 30.546  -03 13 42.49  21.2w 08SO266   F51  C~1vVv      
2014 08  23.58297  02 04 55.514  -02 39 45.66  21.5w 08SO266   F51  C~1vVv      
2014 08  23.59296  02 04 55.495  -02 39 46.12  21.5w 08SO266   F51  C~1vVv      
2014 08  23.60297  02 04 55.478  -02 39 46.51  21.6w 08SO266   F51  C~1vVv      
2014 08  23.61298  02 04 55.459  -02 39 46.89  21.5w 08SO266   F51  C~1vVv      
2014 09  16.48491  02 03 44.442  -02 56 31.50  20.9i 08SO266   F51  C~1vVv      
2014 09  16.49760  02 03 44.384  -02 56 32.21  21.1i 08SO266   F51  C~1vVv      
2014 09  16.51035  02 03 44.337  -02 56 32.92  20.9i 08SO266   F51  C~1vVv      
2014 09  16.52302  02 03 44.280  -02 56 33.37  21.0i 08SO266   F51  C~1vVv      
2014 09  24.49300  02 03 09.732  -03 02 22.28  21.9w 08SO266   F51  C~1vVv      
2014 09  24.50585  02 03 09.683  -03 02 22.91  21.8w 08SO266   F51  C~1vVv      
2014 09  24.51865  02 03 09.627  -03 02 23.59  21.6w 08SO266   F51  C~1vVv      
2014 09  24.53145  02 03 09.573  -03 02 24.03  21.6w 08SO266   F51  C~1vVv      
2014 11  22.37201  01 57 55.295  -03 34 41.94  21.7w 08SO266   F51  C~1vVv      
2014 11  22.38540  01 57 55.219  -03 34 42.06  21.5w 08SO266   F51  C~1vVv      
2014 11  22.39882  01 57 55.158  -03 34 42.36  21.5w 08SO266   F51  C~1vVv      
2014 11  22.41227  01 57 55.111  -03 34 42.42  21.5w 08SO266   F51  C~1vVv      
2014 11  24.30101  01 57 46.143  -03 35 09.91  21.8w 08SO266   F51  C~1vVv      
2014 11  24.31443  01 57 46.073  -03 35 10.08  21.9w 08SO266   F51  C~1vVv      
2014 11  24.32786  01 57 46.006  -03 35 10.18  21.6w 08SO266   F51  C~1vVv      
2014 11  24.34126  01 57 45.949  -03 35 10.26  21.7w 08SO266   F51  C~1vVv      
2015 10  11.27860  02 10 02.42   -02 55 30.6   21.2R 08SO266   695  C~1hUL      
2015 10  11.32378  02 10 02.17   -02 55 31.9         08SO266   695  C~1hUL      
2015 10  11.37100  02 10 01.93   -02 55 33.7         08SO266   695  C~1hUL      
2016 09  25.51385  02 19 24.774  -02 26 41.00  21.9w 08SO266   F51  C~1ySI      
2016 09  25.52653  02 19 24.687  -02 26 42.09  21.8w 08SO266   F51  C~1ySI      
2016 09  25.55187  02 19 24.567  -02 26 43.21  21.8w 08SO266   F51  C~1ySI      

The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.

  1   0.0000      0.00     0.55       0.00    -0.11
  2   0.0001     -3.41 (   0.98)     -0.41 (  -0.11)
  3   0.0024    -81.13     0.66      -9.91    -0.71
  4   0.0025    -84.56 (   1.08)     -9.99 (  -0.38)
  5   0.0701  -2390.74     0.40    -141.08     0.56
  6   0.0704  -2400.87     0.13    -141.29     0.36
  7   0.1557  -4835.24    -0.27      22.74     0.08
  8   0.1557  -4835.24    -0.22      22.74     0.08
  9   0.1557  -4835.37    -0.21      22.80     0.11
 10   0.1825  -5344.03     0.08     137.27     0.10
 11   0.1829  -5350.27     0.32     139.00    -0.11
 12   0.2430  -5877.02    -0.12     465.87    -0.12
 13   0.2430  -5877.02    -0.12     465.87    -0.14
 14   0.2430  -5877.16    -0.25     465.92    -0.12
 15   0.8978  10558.14    -0.75   -1464.54     0.06
 16   0.8980  10555.64    -0.47   -1465.44     0.41
 17   0.8981  10553.10    -0.21   -1467.19    -0.11
 18   0.9063  10398.34    -0.36   -1534.77    -0.03
 19   1.0646   5637.93    -0.64   -2254.61    -0.87
 20   1.0647   5635.83    -0.67   -2254.59    -0.84
 21   2.0360  14398.29     0.62   -4318.74    -0.15
 22   2.0360  14398.10     0.67   -4318.31     0.30
 23   2.0362  14389.82     0.14   -4319.02    -0.02
 24   2.0362  14390.22     0.79   -4318.56     0.45
 25   2.0364  14382.44     0.67   -4319.49    -0.10
 26   2.0365  14382.15     0.63   -4319.13     0.27
 27   2.0998  12252.44    -0.17   -4324.92     0.15
 28   2.0999  12251.17    -0.21   -4324.80     0.19
 29   2.0999  12249.72    -0.31   -4324.76     0.15
 30   2.0999  12248.58    -0.21   -4324.67     0.17
 31   3.0009  23301.87     0.07   -6301.71     0.05
 32   3.0009  23300.62    -0.04   -6301.84     0.04
 33   3.0009  23299.45    -0.08   -6302.01     0.01
 34   3.0010  23298.33    -0.07   -6302.11     0.04
 35   4.1449  26266.24    -0.13   -8336.18     0.05
 36   4.1450  26265.13    -0.17   -8336.10    -0.05
 37   4.1450  26264.10    -0.13   -8335.83     0.04
 38   4.9722  39519.74     0.07  -10317.89     0.05
 39   4.9722  39518.46    -0.08  -10318.19    -0.02
 40   4.9723  39516.58     0.32  -10318.63    -0.01
 41   5.9115  48500.46    -0.01  -11926.21     0.11
 42   5.9115  48499.99    -0.04  -11926.52     0.04
 43   5.9116  48499.58    -0.01  -11926.78     0.03
 44   5.9116  48499.15    -0.00  -11927.02     0.04
 45   5.9769  47048.81     0.00  -12426.01     0.16
 46   5.9770  47047.67    -0.14  -12426.31     0.05
 47   5.9770  47046.69    -0.12  -12426.69    -0.12
 48   5.9770  47045.68    -0.14  -12426.75     0.00
 49   5.9989  46399.84    -0.10  -12537.82     0.20
 50   5.9989  46398.87     0.04  -12538.10     0.06
 51   5.9989  46397.78     0.05  -12538.39    -0.08
 52   5.9990  46396.81     0.20  -12538.47    -0.01
 53   6.1601  41069.47     0.07  -12391.98    -0.10
 54   6.1601  41068.33    -0.04  -12391.62     0.04
 55   6.1601  41067.34    -0.01  -12391.52    -0.08
 56   6.1602  41066.64     0.32  -12391.29    -0.06
 57   6.1654  40926.90     0.04  -12361.25    -0.11
 58   6.1654  40925.83    -0.03  -12360.97    -0.06
 59   6.1654  40924.83    -0.04  -12360.65     0.03
 60   6.1655  40923.98     0.11  -12360.37     0.09
 61   7.0441  52591.42    -0.40  -14761.40    -0.35
 62   7.0443  52587.20    -0.24  -14761.03     0.16
 63   7.0444  52582.92     0.05  -14761.20     0.13
 64   8.0030  61688.84     0.56  -16748.48     0.10
 65   8.0031  61687.06    -0.12  -16748.95    -0.23
 66   8.0031  61684.77    -0.22  -16749.24    -0.23

The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.

08SO266    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.747    39.754    39.740
ecceobj         0.248     0.248     0.248
incobj         18.771    18.771    18.771
qmin           27.435    27.416    27.427
qmax           52.094    52.168    52.162
amean          39.454    39.455    39.454
amin           38.997    39.007    39.007
amax           40.005    39.988    40.028
emean           0.244     0.242     0.245
emin            0.172     0.172     0.172
emax            0.304     0.305     0.303
imean          17.857    17.954    17.837
imin           14.981    14.921    14.991
imax           20.336    20.360    20.394
excite_mean     0.394     0.394     0.394
fracstop        1.000     1.000     1.000
cjmean          2.874     2.874     2.874

libcent 0       180.1     179.5     179.9
libamp  0        88.4      86.9      85.7
libcent 1      -180.0    -180.0    -180.0
libamp  1      -180.0    -180.0    -180.0
libcent 2      -180.0    -180.0    -180.0
libamp  2      -180.0    -180.0    -180.0
libcent 3      -180.0    -180.0    -180.0
libamp  3      -180.0    -180.0    -180.0
libcent 4      -180.0    -180.0    -180.0
libamp  4      -180.0    -180.0    -180.0

kozaimean        71.7     111.2      70.1
kozaiamp         84.6     180.0      86.0