Orbit Fit and Astrometric record for 13TB172

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: 13TB172   
# Created Sat Nov 27 02:12:08 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     37 observations of     37
# Arc:   5.01y
# First observation: 2013/10/13
#  Last observation: 2018/10/18
# Chi-squared of fit:    24.51 DOF:     68 RMS:  0.14
# Min/Max residuals:    -0.31    0.53
# Exact a, adot, b, bdot, g, gdot:
  1.875541E-05  3.407306E-02  3.301583E-06  6.325096E-03  2.969269E-02  5.264539E-04
# Covariance matrix:
  1.8136E-13 -1.2568E-13  6.6646E-15 -1.4022E-14  2.4597E-14 -5.3204E-13
 -1.2568E-13  2.0165E-13 -1.7903E-14  3.3728E-14  6.2661E-14  1.2704E-12
  6.6646E-15 -1.7903E-14  1.3045E-13 -4.4318E-14 -1.2770E-14 -1.3176E-13
 -1.4022E-14  3.3728E-14 -4.4318E-14  2.5469E-14  1.8188E-14  2.4183E-13
  2.4597E-14  6.2661E-14 -1.2770E-14  1.8188E-14  2.3648E-13  6.6962E-13
 -5.3204E-13  1.2704E-12 -1.3176E-13  2.4183E-13  6.6962E-13  9.0923E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -5.077473   10.129881   -0.165833   -0.086922   -0.979664  2456578.713688
# Heliocentric elements and errors
Epoch:              2456578.5000  =  2013/10/13
Mean Anomaly:            4.24513 +/-     0.020
Argument of Peri:      328.27756 +/-     0.030
Long of Asc Node:       35.23146 +/-     0.000
Inclination:            11.61930 +/-     0.000
Eccentricity:         0.19665843 +/-    0.0001
Semi-Major Axis:     43.09802304 +/-    0.0037
Time of Perihelion: 2455359.8670 +/-       5.6
Perihelion:          34.62243333 +/-    0.0039
Aphelion:            51.57361275 +/-    0.0051
Period (y)              282.9399 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.96165586 +/-    0.0005
Ecliptic Y            6.23938418 +/-    0.0001
Ecliptic Z           -2.98055201 +/-    0.0000
Ecliptic XDOT        -0.00046033 +/-    0.0000
Ecliptic YDOT         0.00310891 +/-    0.0000
Ecliptic ZDOT         0.00057677 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.65843161 +/-    0.0005
Geocenter to KBO     33.67835587 +/-    0.0006
# Hcoef:  7.80

The following table shows the complete astrometric record for 13TB172. 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 (13TB172) followed by the observatory code and reference code for the source of the astrometry.

2013 10  13.21291  00 45 12.068  -00 39 34.79  22.6i 13TB172   W84  C~4yR8      
2013 10  13.21291  00 45 12.07   -00 39 34.8   22.5i 13TB172   W84  C~3clO      
2013 10  13.21708  00 45 12.060  -00 39 34.91  22.6z 13TB172   W84  C~4yR8      
2013 11  08.18987  00 43 04.937  -00 49 41.85  23.8r 13TB172   W84  C~4yR8      
2013 11  08.190729 00 43 04.91   -00 49 41.7   23.2i 13TB172   W84  C~352D      
2013 11  08.19126  00 43 04.903  -00 49 41.16  22.9i 13TB172   W84  C~4yR8      
2013 11  23.14833  00 42 09.662  -00 52 53.18  23.1i 13TB172   W84  C~4yR8      
2013 11  23.14833  00 42 09.66   -00 52 53.2   23.1i 13TB172   W84  C~3clO      
2014 08  18.33275  00 56 10.390  +00 52 52.51  22.8i 13TB172   W84  C~4yR8      
2014 10  28.20698  00 50 32.049  +00 19 44.38  23.2i 13TB172   W84  C~4yR8      
2014 10  29.21054  00 50 27.093  +00 19 20.66  23.0r 13TB172   W84  C~4yR8      
2014 10  29.21054  00 50 27.09   +00 19 20.7   23.0r 13TB172   W84  C~3clO      
2014 11  14.13269  00 49 15.717  +00 14 09.61  23.4r 13TB172   W84  C~4yR8      
2014 11  14.13269  00 49 15.72   +00 14 09.6   23.4r 13TB172   W84  C~3clO      
2014 11  15.07192  00 49 12.003  +00 13 55.23  22.7z 13TB172   W84  C~4yR8      
2014 11  18.098819 00 49 00.52   +00 13 13.5   22.4z 13TB172   W84  C~352D      
2014 11  18.09934  00 49 00.521  +00 13 13.20  22.5z 13TB172   W84  C~4yR8      
2016 08  16.39263  01 09 17.158  +03 02 55.70  23.2i 13TB172   W84  C~4yR8      
2016 08  16.39263  01 09 17.16   +03 02 55.7   23.6i 13TB172   W84  C~3clO      
2016 08  16.393472 01 09 17.15   +03 02 55.6   22.7z 13TB172   W84  C~352D      
2016 08  16.39399  01 09 17.150  +03 02 55.50  23.0z 13TB172   W84  C~4yR8      
2016 08  26.331829 01 08 46.87   +02 59 31.7   23.2r 13TB172   W84  C~352D      
2016 10  29.18898  01 03 33.784  +02 29 57.40  23.5i 13TB172   W84  C~4yR8      
2016 10  29.19036  01 03 33.781  +02 29 57.36  23.3r 13TB172   W84  C~4yR8      
2016 10  29.19036  01 03 33.78   +02 29 57.4   23.4r 13TB172   W84  C~3clO      
2016 10  29.19174  01 03 33.769  +02 29 57.06  23.9g 13TB172   W84  C~4yR8      
2016 11  06.16827  01 02 54.822  +02 26 53.47  23.3r 13TB172   W84  C~4yR8      
2016 11  06.16827  01 02 54.82   +02 26 53.5   23.1r 13TB172   W84  C~3clO      
2016 11  06.16964  01 02 54.814  +02 26 53.26  23.2i 13TB172   W84  C~4yR8      
2016 11  06.16964  01 02 54.81   +02 26 53.3   23.1i 13TB172   W84  C~3clO      
2017 08  22.41286  01 15 31.635  +04 05 24.48  23.3i 13TB172   W84  C~4yR8      
2017 08  27.37768  01 15 15.804  +04 03 42.71  23.6r 13TB172   W84  C~4yR8      
2017 08  28.37103  01 15 12.378  +04 03 21.06  23.2z 13TB172   W84  C~4yR8      
2017 09  14.32368  01 14 03.157  +03 56 19.37  23.6r 13TB172   W84  C~4yR8      
2017 09  14.32506  01 14 03.136  +03 56 19.38  23.6i 13TB172   W84  C~4yR8      
2017 09  24.25751  01 13 14.778  +03 51 38.46  20.8z 13TB172   W84  C~4yR8      
2018 10  18.20313  01 17 43.055  +04 44 52.96  22.8z 13TB172   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    -0.12       0.00    -0.04
     2   0.0000      0.00    -0.09       0.00    -0.05
     3   0.0000      0.00     0.10       0.00    -0.04
     4   0.0711      0.00     0.15       0.00    -0.19
     5   0.0711      0.00    -0.20       0.00    -0.02
     6   0.0711      0.00    -0.27       0.00     0.53
     7   0.1121      0.00     0.04       0.00     0.05
     8   0.1121      0.00     0.07       0.00     0.07
     9   0.8463      0.00     0.16       0.00    -0.18
    10   1.0404      0.00    -0.15       0.00     0.14
    11   1.0431      0.00    -0.23       0.00     0.10
    12   1.0431      0.00    -0.18       0.00     0.06
    13   1.0867      0.00     0.13       0.00    -0.03
    14   1.0867      0.00     0.08       0.00    -0.02
    15   1.0893      0.00    -0.07       0.00    -0.25
    16   1.0976      0.00     0.34       0.00     0.09
    17   1.0976      0.00     0.39       0.00    -0.20
    18   2.8424      0.00     0.02       0.00     0.05
    19   2.8424      0.00    -0.01       0.00     0.05
    20   2.8424      0.00    -0.10       0.00    -0.03
    21   2.8424      0.00    -0.08       0.00    -0.12
    22   2.8696      0.00     0.18       0.00     0.23
    23   3.0444      0.00    -0.08       0.00    -0.04
    24   3.0444      0.00    -0.03       0.00    -0.00
    25   3.0444      0.00    -0.01       0.00    -0.04
    26   3.0444      0.00    -0.09       0.00    -0.31
    27   3.0663      0.00     0.05       0.00     0.08
    28   3.0663      0.00     0.08       0.00     0.05
    29   3.0663      0.00     0.00       0.00    -0.09
    30   3.0663      0.00     0.06       0.00    -0.13
    31   3.8582      0.00    -0.08       0.00     0.01
    32   3.8718      0.00     0.17       0.00     0.03
    33   3.8745      0.00    -0.00       0.00    -0.00
    34   3.9209      0.00     0.19       0.00     0.07
    35   3.9209      0.00    -0.03       0.00     0.12
    36   3.9481      0.00    -0.08       0.00     0.12
    37   5.0130      0.00    -0.11       0.00     0.01

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.

13TB172    quality flag:2

Type:       SCATNEAR 12:7EEEEE  SCATNEAR

axisobj        43.376    43.376    43.376
ecceobj         0.202     0.202     0.202
incobj         11.604    11.604    11.604
qmin           33.816    34.097    32.810
qmax           52.797    52.675    54.076
amean          43.142    43.129    43.132
amin           42.661    42.670    42.607
amax           43.646    43.636    43.719
emean           0.192     0.196     0.203
emin            0.161     0.184     0.176
emax            0.213     0.209     0.239
imean          10.371    10.035    11.145
imin            8.880     8.752     8.932
imax           11.939    11.297    14.021
excite_mean     0.263     0.263     0.281
fracstop        1.000     1.000     1.000
cjmean          3.008     3.009     2.995

libcent 0      -180.0     182.3    -180.0
libamp  0      -180.0     124.7    -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       175.8     169.9     173.8
kozaiamp        180.0     180.0     179.9