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 Oct 18 01:09:28 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   28 observations of   28
# Arc:   8.80y
# First observation: 2005/06/04
#  Last observation: 2014/03/24
# Chi-squared of fit:    28.58 DOF:   50 RMS:  0.18
# Min/Max residuals:    -0.24    0.59
# Exact a, adot, b, bdot, g, gdot:
  1.528326E-05  2.619289E-02 -7.211192E-06 -1.458351E-02  2.743881E-02 -1.854657E-03
# Covariance matrix:
  2.4110E-13 -5.7213E-14 -6.9666E-15  1.4964E-14 -1.6313E-14 -1.1533E-13
 -5.7213E-14  6.3094E-14  1.3410E-14 -2.8560E-14  9.4700E-15  2.2026E-13
 -6.9666E-15  1.3410E-14  2.3031E-13 -3.6314E-14  1.8366E-14  6.0408E-14
  1.4964E-14 -2.8560E-14 -3.6314E-14  2.1705E-14 -4.4499E-14 -1.3196E-13
 -1.6313E-14  9.4700E-15  1.8366E-14 -4.4499E-14  4.9710E-13  3.3998E-13
 -1.1533E-13  2.2026E-13  6.0408E-14 -1.3196E-13  3.3998E-13  1.0157E-12
#      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:          342.38632 +/-     0.016
Argument of Peri:      186.76922 +/-     0.019
Long of Asc Node:      351.83047 +/-     0.000
Inclination:            30.11649 +/-     0.000
Eccentricity:         0.11374332 +/-    0.0001
Semi-Major Axis:     40.69496003 +/-    0.0050
Time of Perihelion: 2458165.8472 +/-      17.0
Perihelion:          36.06618033 +/-    0.0056
Aphelion:            45.32373973 +/-    0.0065
Period (y)              259.6086 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -33.49370708 +/-    0.0009
Ecliptic Y           13.24230031 +/-    0.0004
Ecliptic Z            4.84259342 +/-    0.0001
Ecliptic XDOT        -0.00103682 +/-    0.0000
Ecliptic YDOT        -0.00240574 +/-    0.0000
Ecliptic ZDOT        -0.00146678 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.34060289 +/-    0.0008
Geocenter to KBO     36.44481049 +/-    0.0009
# Hcoef:  6.97

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 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      
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  27.36849  11 19 31.740  +06 20 40.59  23.1w 13XD26    F51  C~1w3v      
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 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  05.52187  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      

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    -0.15       0.00    -0.19
  2   0.0000      0.00    -0.16       0.00    -0.17
  3   0.0000      0.00    -0.05       0.00    -0.19
  4   0.0027      0.00     0.10       0.00     0.22
  5   0.0027      0.00     0.08       0.00     0.14
  6   0.0027      0.00     0.04       0.00     0.32
  7   5.0735      0.00    -0.15       0.00     0.18
  8   5.8265      0.00     0.59       0.00    -0.20
  9   5.8266      0.00     0.08       0.00     0.01
 10   5.8266      0.00    -0.16       0.00    -0.14
 11   6.7303      0.00    -0.20       0.00    -0.02
 12   6.7304      0.00     0.03       0.00    -0.10
 13   6.8123      0.00    -0.17       0.00     0.20
 14   7.6995      0.00     0.19       0.00     0.18
 15   7.6995      0.00     0.35       0.00    -0.09
 16   7.6996      0.00     0.15       0.00     0.13
 17   7.6996      0.00     0.24       0.00    -0.14
 18   8.5022      0.00    -0.06       0.00     0.01
 19   8.5023      0.00    -0.14       0.00    -0.10
 20   8.5023      0.00    -0.14       0.00     0.08
 21   8.6856      0.00     0.36       0.00     0.22
 22   8.7371      0.00     0.01       0.00    -0.24
 23   8.7372      0.00    -0.03       0.00    -0.01
 24   8.7372      0.00    -0.13       0.00     0.04
 25   8.7372      0.00    -0.03       0.00    -0.12
 26   8.7511      0.00    -0.15       0.00     0.15
 27   8.8027      0.00     0.13       0.00    -0.04
 28   8.8027      0.00     0.22       0.00    -0.22

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        40.399    40.399    40.399
ecceobj         0.106     0.106     0.106
incobj         30.235    30.235    30.235
qmin           35.063    35.117    35.105
qmax           46.200    46.205    46.217
amean          40.524    40.524    40.524
amin           40.204    40.191    40.204
amax           40.865    40.860    40.864
emean           0.116     0.116     0.116
emin            0.100     0.100     0.100
emax            0.131     0.132     0.132
imean          30.637    30.637    30.637
imin           30.209    30.211    30.207
imax           31.001    31.001    31.001
excite_mean     0.523     0.523     0.523
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       182.8     182.7     182.8
kozaiamp        180.0     179.9     180.0