Orbit Fit and Astrometric record for 13TX171

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: 13TX171   
# Created Fri Dec  3 02:12:03 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     37 observations of     37
# Arc:   5.22y
# First observation: 2013/09/09
#  Last observation: 2018/11/27
# Chi-squared of fit:     9.57 DOF:     68 RMS:  0.09
# Min/Max residuals:    -0.22    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.775116E-05  3.146612E-02 -5.320150E-06 -1.040913E-02  2.816467E-02  2.382360E-05
# Covariance matrix:
  2.9660E-13 -6.8951E-14 -1.3016E-14  1.4406E-14  1.9420E-13 -3.0201E-13
 -6.8951E-14  1.1198E-13  2.3113E-14 -3.7614E-14  4.4275E-14  7.7010E-13
 -1.3016E-14  2.3113E-14  1.1868E-13 -4.2666E-14  4.9782E-15  1.8495E-13
  1.4406E-14 -3.7614E-14 -4.2666E-14  3.0118E-14 -1.6455E-14 -3.0017E-13
  1.9420E-13  4.4275E-14  4.9782E-15 -1.6455E-14  2.7967E-13  3.2819E-13
 -3.0201E-13  7.7010E-13  1.8495E-13 -3.0017E-13  3.2819E-13  6.1464E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -7.089241    7.858016    0.369255   -0.115683   -0.930903  2456544.713858
# Heliocentric elements and errors
Epoch:              2456544.5000  =  2013/09/09
Mean Anomaly:          358.32136 +/-     0.011
Argument of Peri:      204.10255 +/-     0.020
Long of Asc Node:      167.38903 +/-     0.000
Inclination:            19.60002 +/-     0.000
Eccentricity:         0.27835365 +/-    0.0001
Semi-Major Axis:     50.47747334 +/-    0.0057
Time of Perihelion: 2457155.3009 +/-      22.6
Perihelion:          36.42688456 +/-    0.0054
Aphelion:            64.52806212 +/-    0.0081
Period (y)              358.6366 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.88253932 +/-    0.0007
Ecliptic Y            4.58270975 +/-    0.0001
Ecliptic Z           -4.38211283 +/-    0.0001
Ecliptic XDOT        -0.00054580 +/-    0.0000
Ecliptic YDOT         0.00301215 +/-    0.0000
Ecliptic ZDOT        -0.00100427 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.43845953 +/-    0.0006
Geocenter to KBO     35.50551446 +/-    0.0007
# Hcoef:  7.44

The following table shows the complete astrometric record for 13TX171. 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 (13TX171) followed by the observatory code and reference code for the source of the astrometry.

2013 09  09.21308  00 40 03.172  -03 23 51.11  23.0g 13TX171   W84  C~4yR8      
2013 10  04.158218 00 38 05.50   -03 39 54.7   23.9g 13TX171   W84  C~352D      
2013 10  13.22535  00 37 21.349  -03 45 18.20  22.6i 13TX171   W84  C~4yR8      
2013 10  13.22535  00 37 21.35   -03 45 18.2   23.0i 13TX171   W84  C~3clO      
2013 10  13.22672  00 37 21.330  -03 45 17.92  23.2z 13TX171   W84  C~4yR8      
2013 11  08.15030  00 35 28.488  -03 57 35.17  22.9r 13TX171   W84  C~4yR8      
2013 11  08.15030  00 35 28.49   -03 57 35.2   23.0r 13TX171   W84  C~3clO      
2013 11  23.13775  00 34 41.248  -04 01 46.62  22.9i 13TX171   W84  C~4yR8      
2013 11  23.13775  00 34 41.25   -04 01 46.6   22.9i 13TX171   W84  C~3clO      
2014 11  14.057153 00 42 40.75   -03 49 48.1   23.1r 13TX171   W84  C~352D      
2014 11  14.05768  00 42 40.747  -03 49 48.15  23.2r 13TX171   W84  C~4yR8      
2014 11  14.05768  00 42 40.75   -03 49 48.1   23.1r 13TX171   W84  C~3clO      
2014 11  14.12549  00 42 40.505  -03 49 49.42  22.7i 13TX171   W84  C~4yR8      
2014 11  14.12549  00 42 40.50   -03 49 49.4   22.9i 13TX171   W84  C~3clO      
2014 11  15.12086  00 42 37.091  -03 50 07.34  23.2z 13TX171   W84  C~4yR8      
2014 11  27.063519 00 42 02.25   -03 52 50.7   22.5z 13TX171   W84  C~352D      
2014 11  27.06404  00 42 02.262  -03 52 50.98  22.7z 13TX171   W84  C~4yR8      
2015 12  05.08831  00 49 14.50   -03 43 59.5   23.1r 13TX171   W84  C~3clO      
2016 08  26.30763  01 03 34.860  -02 45 01.61  23.3r 13TX171   W84  C~4yR8      
2016 08  26.30899  01 03 34.863  -02 45 01.58  22.6i 13TX171   W84  C~4yR8      
2016 08  26.30899  01 03 34.86   -02 45 01.6   22.8i 13TX171   W84  C~3clO      
2016 10  29.23021  00 58 48.439  -03 23 51.50  22.9r 13TX171   W84  C~4yR8      
2016 10  29.23021  00 58 48.44   -03 23 51.5   22.9r 13TX171   W84  C~3clO      
2016 10  29.23157  00 58 48.438  -03 23 51.55  22.7i 13TX171   W84  C~4yR8      
2016 10  29.23157  00 58 48.44   -03 23 51.5   22.6i 13TX171   W84  C~3clO      
2016 10  29.23296  00 58 48.414  -03 23 51.83  23.7g 13TX171   W84  C~4yR8      
2016 10  29.23296  00 58 48.42   -03 23 51.8   23.9g 13TX171   W84  C~3clO      
2016 11  06.20939  00 58 13.526  -03 27 16.94  22.6i 13TX171   W84  C~4yR8      
2016 11  06.20939  00 58 13.52   -03 27 16.9   22.6i 13TX171   W84  C~3clO      
2016 11  06.21077  00 58 13.527  -03 27 17.10  22.8r 13TX171   W84  C~4yR8      
2016 11  06.21077  00 58 13.53   -03 27 17.1   22.9r 13TX171   W84  C~3clO      
2016 11  07.20345  00 58 09.397  -03 27 40.25  23.9g 13TX171   W84  C~4yR8      
2016 11  08.15923  00 58 05.468  -03 28 01.68  22.8z 13TX171   W84  C~4yR8      
2018 10  19.15760  01 14 45.318  -02 57 31.36  22.5z 13TX171   W84  C~4yR8      
2018 11  07.20181  01 13 15.668  -03 06 38.76  23.2r 13TX171   W84  C~4yR8      
2018 11  15.05989  01 12 42.896  -03 09 26.86  22.6i 13TX171   W84  C~4yR8      
2018 11  27.10561  01 12 00.182  -03 12 27.01  23.8g 13TX171   W84  C~4yR8      

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     0.03       0.00    -0.11
     2   0.0683      0.00     0.02       0.00     0.07
     3   0.0931      0.00     0.02       0.00    -0.13
     4   0.0931      0.00     0.03       0.00    -0.13
     5   0.0931      0.00    -0.17       0.00     0.20
     6   0.1641      0.00     0.05       0.00    -0.02
     7   0.1641      0.00     0.02       0.00     0.01
     8   0.2051      0.00    -0.00       0.00     0.03
     9   0.2051      0.00    -0.03       0.00     0.01
    10   1.1796      0.00     0.10       0.00     0.06
    11   1.1796      0.00     0.13       0.00     0.07
    12   1.1796      0.00     0.08       0.00     0.02
    13   1.1798      0.00    -0.02       0.00     0.02
    14   1.1798      0.00     0.06       0.00    -0.00
    15   1.1825      0.00    -0.11       0.00     0.00
    16   1.2152      0.00    -0.16       0.00     0.13
    17   1.2152      0.00     0.04       0.00    -0.14
    18   2.2365      0.00    -0.04       0.00     0.15
    19   2.9626      0.00    -0.02       0.00    -0.08
    20   2.9626      0.00     0.05       0.00    -0.02
    21   2.9626      0.00     0.09       0.00    -0.00
    22   3.1376      0.00     0.02       0.00     0.04
    23   3.1376      0.00     0.00       0.00     0.04
    24   3.1376      0.00     0.11       0.00     0.07
    25   3.1376      0.00     0.08       0.00     0.02
    26   3.1376      0.00    -0.09       0.00    -0.19
    27   3.1376      0.00    -0.18       0.00    -0.22
    28   3.1595      0.00    -0.08       0.00     0.14
    29   3.1595      0.00     0.01       0.00     0.10
    30   3.1595      0.00     0.16       0.00    -0.03
    31   3.1595      0.00     0.12       0.00    -0.03
    32   3.1622      0.00     0.02       0.00    -0.14
    33   3.1648      0.00    -0.17       0.00     0.06
    34   5.1087      0.00    -0.01       0.00    -0.00
    35   5.1608      0.00     0.06       0.00    -0.05
    36   5.1823      0.00     0.01       0.00     0.03
    37   5.2153      0.00    -0.04       0.00     0.10

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.

13TX171    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        50.831    50.831    50.831
ecceobj         0.284     0.284     0.284
incobj         19.550    19.550    19.550
qmin           35.905    35.907    35.904
qmax           65.531    65.523    65.529
amean          50.415    50.415    50.415
amin           49.929    49.929    49.929
amax           51.014    51.014    51.014
emean           0.272     0.272     0.272
emin            0.256     0.256     0.256
emax            0.286     0.286     0.286
imean          19.179    19.179    19.178
imin           18.727    18.727    18.727
imax           19.726    19.727    19.726
excite_mean     0.426     0.426     0.426
fracstop        1.000     1.000     1.000
cjmean          2.949     2.949     2.949

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       196.9     196.9     196.8
kozaiamp        180.0     180.0     180.0