Orbit Fit and Astrometric record for 13XD26

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: 13XD26    
# Created Thu Apr 18 01:09:55 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   64 observations of   64
# Arc:  12.61y
# First observation: 2005/06/04
#  Last observation: 2018/01/12
# Chi-squared of fit:    69.97 DOF:  122 RMS:  0.18
# Min/Max residuals:    -0.59    0.55
# Exact a, adot, b, bdot, g, gdot:
  1.544004E-05  2.619292E-02 -6.991411E-06 -1.458364E-02  2.743936E-02 -1.854005E-03
# Covariance matrix:
  2.2473E-13 -4.3182E-14 -2.5565E-14  1.3143E-14 -1.6926E-14 -7.0800E-14
 -4.3182E-14  1.5645E-14  1.2877E-14 -6.4800E-15 -2.5080E-15  3.4643E-14
 -2.5565E-14  1.2877E-14  1.8660E-13 -2.5407E-14  4.2206E-15  3.5712E-14
  1.3143E-14 -6.4800E-15 -2.5407E-14  5.7023E-15 -3.0476E-15 -1.8289E-14
 -1.6926E-14 -2.5080E-15  4.2206E-15 -3.0476E-15  7.2011E-14  1.8071E-14
 -7.0800E-14  3.4643E-14  3.5712E-14 -1.8289E-14  1.8071E-14  9.8384E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
    7.636111  156.823924   -1.005101   -0.016246    0.121733  2453525.666520
# Heliocentric elements and errors
Epoch:              2453526.5000  =  2005/06/05
Mean Anomaly:          342.38467 +/-     0.007
Argument of Peri:      186.76828 +/-     0.008
Long of Asc Node:      351.83042 +/-     0.000
Inclination:            30.11670 +/-     0.000
Eccentricity:         0.11367679 +/-    0.0000
Semi-Major Axis:     40.69128534 +/-    0.0019
Time of Perihelion: 2458165.6535 +/-       6.7
Perihelion:          36.06563056 +/-    0.0022
Aphelion:            45.31694012 +/-    0.0025
Period (y)              259.5735 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -33.49304824 +/-    0.0003
Ecliptic Y           13.24201205 +/-    0.0001
Ecliptic Z            4.84250509 +/-    0.0000
Ecliptic XDOT        -0.00103686 +/-    0.0000
Ecliptic YDOT        -0.00240567 +/-    0.0000
Ecliptic ZDOT        -0.00146676 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.33987884 +/-    0.0003
Geocenter to KBO     36.44408599 +/-    0.0004
# Hcoef:  7.10

The following table shows the complete astrometric record for 13XD26. 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 (13XD26) followed by the observatory code and reference code for the source of the astrometry.

2005 06  04.165777 10 45 57.86   +16 05 08.8   22.3V 13XD26    645  C~2hhx      
2005 06  04.166607 10 45 57.86   +16 05 08.8   21.8V 13XD26    645  C~2hhx      
2005 06  04.169094 10 45 57.87   +16 05 08.7   23.0V 13XD26    645  C~2hhx      
2005 06  05.157822 10 45 58.99   +16 04 40.2   22.7V 13XD26    645  C~2hhx      
2005 06  05.158651 10 45 58.99   +16 04 40.1   22.4V 13XD26    645  C~2hhx      
2005 06  05.161139 10 45 58.99   +16 04 40.2   23.4V 13XD26    645  C~2hhx      
2010 07  01.27789  11 08 29.640  +09 03 38.63  22.6w 13XD26    F51  C~1w3v      
2011 03  09.50703  11 16 54.128  +07 39 06.21  22.1G 13XD26    F51  C~2rXz      
2011 03  11.35639  11 16 43.852  +07 39 53.43  22.7G 13XD26    F51  C~2rXz      
2011 04  02.29940  11 14 45.892  +07 48 20.65  23.8w 13XD26    F51  C~1w3v      
2011 04  02.33071  11 14 45.698  +07 48 21.49  22.9w 13XD26    F51  C~1w3v      
2011 04  02.34581  11 14 45.605  +07 48 21.64  23.2w 13XD26    F51  C~1w3v      
2011 06  25.29679  11 12 24.580  +07 44 23.34  22.6G 13XD26    F51  C~2rXz      
2012 02  26.39881  11 22 16.048  +06 08 09.54  22.8w 13XD26    F51  C~1w3v      
2012 02  26.44284  11 22 15.821  +06 08 10.59  22.9w 13XD26    F51  C~1w3v      
2012 03  02.55751  11 21 47.878  +06 10 22.68  21.6G 13XD26    F51  C~2rXz      
2012 03  27.32517  11 19 31.976  +06 20 38.76  22.4G 13XD26    F51  C~2rXz      
2012 03  27.33959  11 19 31.923  +06 20 40.22  23.4G 13XD26    F51  C~2rXz      
2012 03  27.36849  11 19 31.740  +06 20 40.59  23.1w 13XD26    F51  C~1w3v      
2013 02  13.57422  11 27 36.497  +04 37 02.48  22.6G 13XD26    F51  C~2rXz      
2013 02  14.40262  11 27 32.430  +04 37 21.71  22.6w 13XD26    F51  C~1w3v      
2013 02  14.41718  11 27 32.368  +04 37 21.77  22.7w 13XD26    F51  C~1w3v      
2013 02  14.43182  11 27 32.281  +04 37 22.33  22.6w 13XD26    F51  C~1w3v      
2013 02  14.44657  11 27 32.213  +04 37 22.39  22.5w 13XD26    F51  C~1w3v      
2013 06  27.28877  11 20 51.540  +04 57 11.11  23.8G 13XD26    F51  C~2rXz      
2013 12  04.61220  11 34 04.607  +03 07 33.89  22.5w 13XD26    F51  C~1w3v      
2013 12  04.61747  11 34 04.610  +03 07 33.67  22.6w 13XD26    F51  C~1w3v      
2013 12  04.62799  11 34 04.628  +03 07 33.64  22.5w 13XD26    F51  C~1w3v      
2014 02  09.59287  11 32 13.579  +03 09 16.01  21.8w 13XD26    F51  C~1w3v      
2014 02  28.40694  11 30 38.851  +03 16 24.62  22.4w 13XD26    F51  C~1w3v      
2014 02  28.41930  11 30 38.780  +03 16 25.16  22.6w 13XD26    F51  C~1w3v      
2014 02  28.43181  11 30 38.705  +03 16 25.52  22.7w 13XD26    F51  C~1w3v      
2014 02  28.44420  11 30 38.644  +03 16 25.67  22.7w 13XD26    F51  C~1w3v      
2014 03  05.49715  11 30 11.128  +03 18 33.82  22.9G 13XD26    F51  C~2rXz      
2014 03  05.50949  11 30 11.054  +03 18 34.02  23.4G 13XD26    F51  C~2rXz      
2014 03  05.52187  11 30 11.000  +03 18 34.48  22.1w 13XD26    F51  C~1w3v      
2014 03  24.35247  11 28 27.473  +03 26 36.93  22.6w 13XD26    F51  C~1w3v      
2014 03  24.36393  11 28 27.416  +03 26 37.03  22.4w 13XD26    F51  C~1w3v      
2014 04  30.27969  11 25 38.838  +03 38 42.13  22.6G 13XD26    F51  C~2rXz      
2014 05  20.28284  11 24 48.861  +03 40 53.07  22.5G 13XD26    F51  C~2rXz      
2014 05  20.29452  11 24 48.817  +03 40 53.43  22.5G 13XD26    F51  C~2rXz      
2014 05  20.30620  11 24 48.799  +03 40 53.22  22.9G 13XD26    F51  C~2rXz      
2014 05  20.31789  11 24 48.789  +03 40 53.44  22.6G 13XD26    F51  C~2rXz      
2014 11  29.61870  11 38 02.715  +01 45 43.51  22.7G 13XD26    F51  C~2rXz      
2014 12  10.58642  11 38 22.806  +01 41 39.14  23.2G 13XD26    F51  C~2rXz      
2015 01  21.55962  11 37 43.687  +01 38 24.05  22.5G 13XD26    F51  C~2rXz      
2015 01  21.57118  11 37 43.648  +01 38 24.25  22.8G 13XD26    F51  C~2rXz      
2015 01  21.58273  11 37 43.632  +01 38 24.35  22.9G 13XD26    F51  C~2rXz      
2015 01  21.59433  11 37 43.589  +01 38 24.47  23.0G 13XD26    F51  C~2rXz      
2015 01  29.66374  11 37 16.323  +01 39 54.73  22.3G 13XD26    F51  C~2rXz      
2015 01  31.52169  11 37 09.319  +01 40 20.44  22.8G 13XD26    F51  C~2rXz      
2015 02  16.47961  11 35 59.174  +01 45 06.20  22.6G 13XD26    F51  C~2rXz      
2015 02  16.49250  11 35 59.108  +01 45 06.36  22.4G 13XD26    F51  C~2rXz      
2016 02  02.55445  11 41 18.344  +00 14 33.31  22.9G 13XD26    F51  C~2rXz      
2016 02  10.48608  11 40 45.201  +00 16 35.89  23.0G 13XD26    F51  C~2rXz      
2016 02  10.49716  11 40 45.146  +00 16 36.37  22.2G 13XD26    F51  C~2rXz      
2016 02  10.51934  11 40 45.040  +00 16 36.58  22.1G 13XD26    F51  C~2rXz      
2017 01  26.58168  11 45 56.598  -01 12 40.36  22.8G 13XD26    F51  C~2rXz      
2017 03  19.32658  11 41 47.721  -00 55 48.52  22.1G 13XD26    F51  C~2rXz      
2017 03  19.33862  11 41 47.657  -00 55 48.44  22.4G 13XD26    F51  C~2rXz      
2017 03  19.35060  11 41 47.583  -00 55 47.92  22.5G 13XD26    F51  C~2rXz      
2017 03  19.36257  11 41 47.529  -00 55 47.92  22.1G 13XD26    F51  C~2rXz      
2017 04  22.27797  11 38 57.211  -00 41 56.52  22.3G 13XD26    F51  C~2rXz      
2018 01  12.61937  11 50 48.459  -02 38 57.34  22.6G 13XD26    F51  C~2rXz      

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    -0.18       0.00    -0.24
  2   0.0000      0.00    -0.20       0.00    -0.22
  3   0.0000      0.00    -0.08       0.00    -0.25
  4   0.0027      0.00     0.06       0.00     0.17
  5   0.0027      0.00     0.05       0.00     0.09
  6   0.0027      0.00     0.01       0.00     0.27
  7   5.0735      0.00    -0.08       0.00     0.19
  8   5.7614      0.00    -0.12       0.00    -0.20
  9   5.7664      0.00     0.40       0.00    -0.19
 10   5.8265      0.00     0.54       0.00    -0.14
 11   5.8266      0.00     0.04       0.00     0.07
 12   5.8266      0.00    -0.20       0.00    -0.08
 13   6.0565      0.00    -0.04       0.00    -0.07
 14   6.7303      0.00    -0.27       0.00     0.07
 15   6.7304      0.00    -0.04       0.00    -0.01
 16   6.7444      0.00     0.18       0.00     0.33
 17   6.8122      0.00    -0.13       0.00    -0.59
 18   6.8122      0.00     0.23       0.00     0.55
 19   6.8123      0.00    -0.19       0.00     0.26
 20   7.6972      0.00     0.39       0.00    -0.19
 21   7.6995      0.00     0.14       0.00     0.26
 22   7.6995      0.00     0.30       0.00    -0.01
 23   7.6996      0.00     0.10       0.00     0.21
 24   7.6996      0.00     0.19       0.00    -0.06
 25   8.0633      0.00     0.11       0.00     0.22
 26   8.5022      0.00    -0.04       0.00     0.07
 27   8.5023      0.00    -0.13       0.00    -0.04
 28   8.5023      0.00    -0.12       0.00     0.14
 29   8.6856      0.00     0.35       0.00     0.29
 30   8.7371      0.00     0.02       0.00    -0.18
 31   8.7372      0.00    -0.03       0.00     0.05
 32   8.7372      0.00    -0.12       0.00     0.10
 33   8.7372      0.00    -0.02       0.00    -0.06
 34   8.7511      0.00    -0.28       0.00     0.18
 35   8.7511      0.00    -0.36       0.00     0.07
 36   8.7511      0.00    -0.13       0.00     0.21
 37   8.8027      0.00     0.18       0.00     0.01
 38   8.8027      0.00     0.27       0.00    -0.18
 39   8.9038      0.00    -0.16       0.00     0.04
 40   8.9586      0.00     0.18       0.00    -0.31
 41   8.9586      0.00    -0.19       0.00     0.04
 42   8.9586      0.00    -0.16       0.00    -0.17
 43   8.9587      0.00    -0.02       0.00     0.04
 44   9.4879      0.00    -0.10       0.00    -0.19
 45   9.5179      0.00    -0.18       0.00     0.01
 46   9.6328      0.00    -0.09       0.00    -0.22
 47   9.6329      0.00    -0.13       0.00    -0.12
 48   9.6329      0.00     0.17       0.00    -0.12
 49   9.6329      0.00     0.07       0.00    -0.10
 50   9.6550      0.00    -0.09       0.00     0.07
 51   9.6601      0.00     0.03       0.00     0.10
 52   9.7038      0.00     0.03       0.00     0.07
 53   9.7038      0.00     0.00       0.00    -0.04
 54  10.6650      0.00    -0.35       0.00    -0.20
 55  10.6867      0.00    -0.05       0.00    -0.13
 56  10.6867      0.00    -0.12       0.00     0.16
 57  10.6868      0.00    -0.20       0.00    -0.02
 58  11.6480      0.00     0.18       0.00     0.20
 59  11.7896      0.00     0.01       0.00     0.16
 60  11.7897      0.00     0.05       0.00    -0.08
 61  11.7897      0.00    -0.05       0.00     0.13
 62  11.7897      0.00     0.14       0.00    -0.18
 63  11.8826      0.00     0.04       0.00    -0.05
 64  12.6090      0.00    -0.01       0.00    -0.12

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.

13XD26    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        40.396    40.396    40.396
ecceobj         0.106     0.106     0.106
incobj         30.235    30.235    30.235
qmin           35.062    35.074    35.076
qmax           46.199    46.201    46.215
amean          40.516    40.519    40.514
amin           40.185    40.196    40.173
amax           40.866    40.866    40.865
emean           0.115     0.115     0.116
emin            0.100     0.101     0.100
emax            0.131     0.131     0.131
imean          30.635    30.637    30.631
imin           30.198    30.209    30.190
imax           30.994    30.994    30.994
excite_mean     0.523     0.523     0.522
fracstop        1.000     1.000     1.000
cjmean          2.726     2.726     2.726

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       183.0     182.7     182.9
kozaiamp        180.0     180.0     180.0