Orbit Fit and Astrometric record for 10WG9

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: 10WG9     
# Created Sat Oct 21 01:37:55 2017
# Orbit generated from Bernstein formalism
# Fitting   35 observations of   35
# Arc:   6.22y
# First observation: 2009/12/24
#  Last observation: 2016/03/13
Preliminary a, adot, b, bdot, g, gdot:
   0.002595   0.043390   0.002123   0.082868   0.050075   0.000000
# Chi-squared of fit:   428.44 DOF:   64 RMS:  0.62
# Min/Max residuals:    -2.66    0.90
# Exact a, adot, b, bdot, g, gdot:
  1.891104E-05  4.598847E-02  2.228255E-05  8.632768E-02  5.373302E-02  1.076697E-02
# Covariance matrix:
  1.7710E-13 -8.2060E-14  3.7990E-14 -3.7226E-14 -1.2345E-13 -8.8868E-14
 -8.2060E-14  5.6466E-14 -4.5080E-14  4.7626E-14  7.3433E-14  1.0403E-13
  3.7990E-14 -4.5080E-14  2.0588E-13 -1.3789E-13 -1.0309E-14 -2.0239E-13
 -3.7226E-14  4.7626E-14 -1.3789E-13  1.3296E-13 -3.6560E-15  2.2800E-13
 -1.2345E-13  7.3433E-14 -1.0309E-14 -3.6560E-15  3.2464E-13  2.9783E-14
 -8.8868E-14  1.0403E-13 -2.0239E-13  2.2800E-13  2.9783E-14  4.6123E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
  -44.061841   71.730685   -0.348713   -0.641896   -0.663341  2455189.554926
# Heliocentric elements and errors
Epoch:              2455180.5000  =  2009/12/15
Mean Anomaly:            3.51230 +/-     0.001
Argument of Peri:      292.92922 +/-     0.001
Long of Asc Node:       92.03735 +/-     0.000
Inclination:            70.28481 +/-     0.000
Eccentricity:         0.65085591 +/-    0.0001
Semi-Major Axis:     53.70915763 +/-    0.0083
Time of Perihelion: 2453777.8135 +/-       0.1
Perihelion:          18.75223506 +/-    0.0039
Aphelion:            88.66608019 +/-    0.0139
Period (y)              393.6232 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            4.15403568 +/-    0.0000
Ecliptic Y           13.68249746 +/-    0.0001
Ecliptic Z          -12.94215722 +/-    0.0001
Ecliptic XDOT        -0.00113954 +/-    0.0000
Ecliptic YDOT         0.00401919 +/-    0.0000
Ecliptic ZDOT         0.00277923 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   19.28642483 +/-    0.0001
Geocenter to KBO     18.61052894 +/-    0.0002
# Hcoef:  8.07

The following table shows the complete astrometric record for 10WG9. 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 (10WG9) followed by the observatory code and reference code for the source of the astrometry.

2009 12  24.05416  05 03 57.120  -21 30 25.92        10WG9     809  C~0Qo8      
2009 12  24.13778  05 03 56.135  -21 30 19.65  20.5R 10WG9     809  C~0Qo8      
2009 12  24.23061  05 03 55.052  -21 30 12.81  20.5R 10WG9     809  C~0Qo8      
2010 11  30.07446  05 16 46.267  -16 34 46.74  20.4R 10WG9     809  C~0Ppr      
2010 11  30.18013  05 16 45.049  -16 34 44.94  20.7R 10WG9     809  C~0Ppr      
2010 11  30.27530  05 16 43.896  -16 34 43.71  20.6R 10WG9     809  C~0Ppr      
2010 12  01.06675  05 16 34.602  -16 34 31.18  20.8R 10WG9     809  C~0Ppr      
2010 12  01.20571  05 16 32.932  -16 34 28.45  20.6R 10WG9     809  C~0Ppr      
2010 12  01.30845  05 16 31.699  -16 34 27.01  20.7R 10WG9     809  C~0Ppr      
2010 12  04.04326  05 15 59.271  -16 33 31.14  21.0R 10WG9     809  C~0Qo8      
2010 12  04.19098  05 15 57.497  -16 33 27.14  20.9R 10WG9     809  C~0Qo8      
2010 12  04.29854  05 15 56.197  -16 33 25.56  20.7R 10WG9     809  C~0Qo8      
2010 12  06.13307  05 15 34.231  -16 32 37.73  20.7R 10WG9     807  C~0Qo8      
2010 12  07.19471  05 15 21.575  -16 32 06.68  20.8R 10WG9     809  C~0Qo8      
2010 12  07.27939  05 15 20.515  -16 32 03.98  21.1R 10WG9     809  C~0Qo8      
2010 12  23.16253  05 12 10.806  -16 19 32.20  20.7R 10WG9     807  C~0Qo8      
2010 12  23.21019  05 12 10.234  -16 19 29.42  20.9R 10WG9     807  C~0Qo8      
2011 04  04.38578  05 05 59.52   -12 35 17.7         10WG9     E10  C~0V9Q      
2011 04  04.40272  05 05 59.62   -12 35 15.1         10WG9     E10  C~0V9Q      
2011 11  18.21324  05 26 10.549  -11 30 30.89  21.0R 10WG9     807  C~0fFL      
2011 11  18.28330  05 26 09.798  -11 30 31.23  20.9R 10WG9     807  C~0fFL      
2013 01  02.141677 05 24 31.94   -06 11 45.3   20.9R 10WG9     G89  C~0nLI      
2013 01  02.156137 05 24 31.79   -06 11 44.2   20.9R 10WG9     G89  C~0nLI      
2013 01  02.169836 05 24 31.64   -06 11 43.3   20.9R 10WG9     G89  C~0nLI      
2013 01  04.136025 05 24 11.16   -06 09 25.6   20.8R 10WG9     G89  C~0nLI      
2013 01  04.151192 05 24 11.00   -06 09 24.5   20.8R 10WG9     G89  C~0nLI      
2013 01  04.165600 05 24 10.85   -06 09 23.5   20.5R 10WG9     G89  C~0nLI      
2013 02  05.169838 05 19 44.63   -05 20 00.3   21.4R 10WG9     G89  C~0oQ8      
2013 02  05.181984 05 19 44.55   -05 19 59.0   21.6R 10WG9     G89  C~0oQ8      
2013 02  05.194130 05 19 44.48   -05 19 57.6   20.9R 10WG9     G89  C~0oQ8      
2013 02  14.146189 05 19 00.03   -05 02 59.8   20.4R 10WG9     G89  C~0oQ8      
2013 02  14.157593 05 18 59.98   -05 02 58.5   20.7R 10WG9     G89  C~0oQ8      
2013 02  14.168997 05 18 59.93   -05 02 57.1   20.8R 10WG9     G89  C~0oQ8      
2016 03  13.12802  05 36 29.03   +08 32 32.9   21.7R 10WG9     G37  C~1pQC      
2016 03  13.18282  05 36 29.04   +08 32 37.6         10WG9     G37  C~1pQC      

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    -1.11       0.00     0.64
  2   0.0002    -12.78    -0.70       8.06     0.63
  3   0.0005    -26.84    -0.13      16.86     0.41
  4   0.9337  13379.60     0.19   16045.56    -0.11
  5   0.9340  13362.46     0.79   16050.00     0.07
  6   0.9342  13346.16     0.51   16053.72    -0.11
  7   0.9364  13215.14     0.44   16086.35    -0.39
  8   0.9368  13191.68     0.37   16092.69     0.04
  9   0.9370  13174.26     0.29   16096.79    -0.32
 10   0.9445  12719.01     0.24   16222.50    -0.13
 11   0.9449  12694.25     0.45   16230.31     0.45
 12   0.9452  12675.89     0.32   16234.68    -0.53
 13   0.9503  12369.02    -0.41   16329.59     0.16
 14   0.9532  12192.73     0.90   16387.68     0.39
 15   0.9534  12177.98     0.50   16392.64     0.59
 16   0.9969   9576.18    -0.16   17543.37     0.13
 17   0.9970   9568.40    -0.30   17547.34    -0.15
 18   1.2767   6135.77    -0.05   31833.17    -0.22
 19   1.2768   6137.60    -0.12   31835.61    -0.07
 20   1.9005  24624.78    -1.31   33167.56    -2.66
 21   1.9007  24613.55    -1.58   33168.95    -2.54
 22   3.0256  26523.27    -0.00   53301.13     0.23
 23   3.0256  26521.16     0.07   53302.63     0.34
 24   3.0256  26519.00     0.00   53303.93     0.31
 25   3.0310  26227.99     0.03   53496.42     0.27
 26   3.0311  26225.72     0.01   53497.95     0.30
 27   3.0311  26223.58     0.02   53499.35     0.26
 28   3.1187  22634.70     0.22   57256.81     0.38
 29   3.1188  22633.68     0.10   57258.38     0.36
 30   3.1188  22632.84     0.15   57260.04     0.42
 31   3.1433  22120.37     0.20   58451.22     0.41
 32   3.1433  22119.82     0.17   58452.73     0.38
 33   3.1434  22119.29     0.16   58454.35     0.46
 34   6.2179  49441.93    -0.13  114139.89    -0.42
 35   6.2180  49443.29    -0.15  114146.11     0.03

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.

10WG9    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        54.114    54.139    54.089
ecceobj         0.653     0.653     0.653
incobj         70.259    70.259    70.258
qmin           16.141    16.627    16.262
qmax           91.382    90.961    91.835
amean          52.900    52.871    53.066
amin           51.968    51.734    52.110
amax           54.114    54.139    54.431
emean           0.665     0.663     0.666
emin            0.643     0.643     0.643
emax            0.691     0.683     0.692
imean          68.185    68.255    68.173
imin           67.416    67.671    67.358
imax           68.952    68.964    68.937
excite_mean     1.142     1.141     1.142
fracstop        0.053     0.049     0.054
cjmean          1.313     1.311     1.312

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -180.0    -180.0
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       284.0     284.1     284.6
kozaiamp          8.4       8.9       8.1