Orbit Fit and Astrometric record for 13TX227

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: 13TX227   
# Created Fri Dec  3 02:12:07 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     17 observations of     17
# Arc:   5.16y
# First observation: 2013/10/04
#  Last observation: 2018/11/30
# Chi-squared of fit:     6.77 DOF:     28 RMS:  0.11
# Min/Max residuals:    -0.22    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.555454E-05  3.160558E-02 -1.160935E-05 -2.250239E-02  2.988498E-02  5.903927E-03
# Covariance matrix:
  5.0488E-13 -3.5890E-13 -1.7138E-13  2.1495E-13  4.4534E-14 -1.9550E-12
 -3.5890E-13  4.2042E-13  2.3921E-13 -3.0390E-13  5.1552E-15  2.7601E-12
 -1.7138E-13  2.3921E-13  4.5533E-13 -2.7803E-13 -1.2570E-14  1.7226E-12
  2.1495E-13 -3.0390E-13 -2.7803E-13  2.7676E-13  1.3386E-15 -2.1848E-12
  4.4534E-14  5.1552E-15 -1.2570E-14  1.3386E-15  2.5461E-13 -2.6755E-14
 -1.9550E-12  2.7601E-12  1.7226E-12 -2.1848E-12 -2.6755E-14  1.9847E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -9.811252   11.438066    0.011768   -0.170348   -0.985675  2456569.666858
# Heliocentric elements and errors
Epoch:              2456570.5000  =  2013/10/05
Mean Anomaly:            6.79884 +/-     0.005
Argument of Peri:      171.46955 +/-     0.015
Long of Asc Node:      178.35716 +/-     0.000
Inclination:            36.59251 +/-     0.000
Eccentricity:         0.51980611 +/-    0.0001
Semi-Major Axis:     69.50080417 +/-    0.0196
Time of Perihelion: 2452573.6720 +/-       3.2
Perihelion:          33.37386148 +/-    0.0139
Aphelion:           105.62774686 +/-    0.0314
Period (y)              579.4193 +/-      0.24
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.29953571 +/-    0.0005
Ecliptic Y            6.72844371 +/-    0.0001
Ecliptic Z           -5.70236944 +/-    0.0001
Ecliptic XDOT        -0.00040230 +/-    0.0000
Ecliptic YDOT         0.00287264 +/-    0.0000
Ecliptic ZDOT        -0.00212339 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.44765748 +/-    0.0005
Geocenter to KBO     33.46155891 +/-    0.0006
# Hcoef:  7.86

The following table shows the complete astrometric record for 13TX227. 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 (13TX227) followed by the observatory code and reference code for the source of the astrometry.

2013 10  04.16608  00 57 23.835  -04 30 31.80  24.0g 13TX227   W84  C~52Re      
2013 12  21.09437  00 52 51.827  -05 02 04.28  23.0i 13TX227   W84  C~52Re      
2014 08  18.33873  01 09 14.363  -04 21 28.10  22.3z 13TX227   W84  C~52Re      
2014 11  17.15544  01 02 37.253  -05 24 54.59  23.8g 13TX227   W84  C~52Re      
2014 11  17.15683  01 02 37.244  -05 24 54.56  23.1i 13TX227   W84  C~52Re      
2014 11  18.17122  01 02 33.497  -05 25 16.45  23.5r 13TX227   W84  C~52Re      
2014 11  21.03813  01 02 23.318  -05 26 14.34  22.8z 13TX227   W84  C~52Re      
2016 08  16.36908  01 26 05.254  -05 14 38.48  23.2i 13TX227   W84  C~52Re      
2016 08  26.35744  01 25 41.740  -05 22 19.61  22.6r 13TX227   W84  C~52Re      
2016 08  30.36644  01 25 29.862  -05 25 31.58  23.7g 13TX227   W84  C~52Re      
2016 10  01.22464  01 23 17.462  -05 51 24.19  23.2i 13TX227   W84  C~52Re      
2016 10  01.22603  01 23 17.469  -05 51 24.16  23.0r 13TX227   W84  C~52Re      
2016 10  01.22740  01 23 17.446  -05 51 24.11  23.9g 13TX227   W84  C~52Re      
2017 11  15.16254  01 27 59.471  -06 44 22.52  23.4r 13TX227   W84  C~52Re      
2017 11  15.16390  01 27 59.444  -06 44 22.42  24.7g 13TX227   W84  C~52Re      
2018 11  30.16797  01 35 14.729  -07 13 17.08  23.3r 13TX227   W84  C~52Re      
2018 11  30.16933  01 35 14.724  -07 13 17.27  24.0g 13TX227   W84  C~52Re      

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     0.25       0.00     0.04
     2   0.2134      0.00    -0.09       0.00     0.09
     3   0.8711      0.00    -0.22       0.00    -0.14
     4   1.1198      0.00     0.03       0.00    -0.03
     5   1.1198      0.00    -0.03       0.00     0.03
     6   1.1225      0.00     0.02       0.00     0.06
     7   1.1304      0.00    -0.11       0.00    -0.05
     8   2.8671      0.00     0.03       0.00    -0.02
     9   2.8944      0.00     0.09       0.00    -0.21
    10   2.9054      0.00     0.08       0.00    -0.02
    11   2.9926      0.00    -0.03       0.00    -0.05
    12   2.9926      0.00     0.17       0.00     0.05
    13   2.9926      0.00    -0.07       0.00     0.16
    14   4.1150      0.00     0.17       0.00     0.06
    15   4.1150      0.00    -0.15       0.00     0.19
    16   5.1554      0.00    -0.03       0.00     0.03
    17   5.1554      0.00    -0.03       0.00    -0.14

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.

13TX227    quality flag:3

Type:       7:2EEEEE  7:2EEEEE  7:2EEEEE

axisobj        70.172    70.172    70.172
ecceobj         0.525     0.525     0.525
incobj         36.513    36.513    36.513
qmin           32.593    32.573    32.573
qmax          108.171   108.053   107.993
amean          69.407    69.407    69.407
amin           68.406    68.464    68.497
amax           70.765    70.702    70.722
emean           0.515     0.517     0.516
emin            0.484     0.494     0.489
emax            0.531     0.531     0.530
imean          36.316    36.211    36.265
imin           35.612    35.611    35.612
imax           37.706    37.306    37.525
excite_mean     0.785     0.785     0.785
fracstop        1.000     1.000     1.000
cjmean          2.531     2.531     2.531

libcent 0       180.4     181.3     180.1
libamp  0       115.7     108.2     109.2
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       190.5     187.1     188.8
kozaiamp         18.6      14.0      16.1