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 Tue Jan 21 02:09:52 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 29 observations of 29 # Arc: 5.01y # First observation: 2013/10/13 # Last observation: 2018/10/18 # Chi-squared of fit: 22.73 DOF: 52 RMS: 0.16 # Min/Max residuals: -0.31 0.53 # Exact a, adot, b, bdot, g, gdot: 1.881935E-05 3.407304E-02 3.252250E-06 6.325107E-03 2.969273E-02 5.264629E-04 # Covariance matrix: 2.5080E-13 -1.8283E-13 1.1073E-14 -2.1608E-14 2.7297E-14 -7.9141E-13 -1.8283E-13 2.7527E-13 -2.5105E-14 4.5400E-14 6.0852E-14 1.6533E-12 1.1073E-14 -2.5105E-14 1.7319E-13 -5.7220E-14 -1.4842E-14 -1.7438E-13 -2.1608E-14 4.5400E-14 -5.7220E-14 3.1799E-14 1.9613E-14 3.0742E-13 2.7297E-14 6.0852E-14 -1.4842E-14 1.9613E-14 2.8310E-13 6.9361E-13 -7.9141E-13 1.6533E-12 -1.7438E-13 3.0742E-13 6.9361E-13 1.1173E-11 # 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: 4.24537 +/- 0.022 Argument of Peri: 328.27733 +/- 0.033 Long of Asc Node: 35.23142 +/- 0.000 Inclination: 11.61932 +/- 0.000 Eccentricity: 0.19665251 +/- 0.0001 Semi-Major Axis: 43.09764783 +/- 0.0042 Time of Perihelion: 2455359.8141 +/- 6.2 Perihelion: 34.62238708 +/- 0.0045 Aphelion: 51.57290857 +/- 0.0058 Period (y) 282.9362 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 33.96161207 +/- 0.0006 Ecliptic Y 6.23937854 +/- 0.0001 Ecliptic Z -2.98054976 +/- 0.0001 Ecliptic XDOT -0.00046033 +/- 0.0000 Ecliptic YDOT 0.00310890 +/- 0.0000 Ecliptic ZDOT 0.00057677 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 34.65838749 +/- 0.0006 Geocenter to KBO 33.67831175 +/- 0.0006 # Hcoef: 7.78
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 13.21708 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 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 11 14.13269 00 49 15.717 +00 14 09.61 23.4r 13TB172 W84 C~4yR8 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 16.393472 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 29.19174 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 06.16964 01 02 54.814 +02 26 53.26 23.2i 13TB172 W84 C~4yR8 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 -0.14 0.00 -0.03
2 0.0000 0.00 0.08 0.00 -0.03
3 0.0711 0.00 0.14 0.00 -0.18
4 0.0711 0.00 -0.21 0.00 -0.02
5 0.0711 0.00 -0.28 0.00 0.53
6 0.1121 0.00 0.06 0.00 0.08
7 0.8463 0.00 0.14 0.00 -0.18
8 1.0404 0.00 -0.16 0.00 0.15
9 1.0431 0.00 -0.19 0.00 0.06
10 1.0867 0.00 0.08 0.00 -0.01
11 1.0893 0.00 -0.07 0.00 -0.24
12 1.0976 0.00 0.34 0.00 0.10
13 1.0976 0.00 0.38 0.00 -0.20
14 2.8424 0.00 -0.02 0.00 0.05
15 2.8424 0.00 -0.11 0.00 -0.03
16 2.8424 0.00 -0.09 0.00 -0.12
17 2.8696 0.00 0.18 0.00 0.23
18 3.0444 0.00 -0.07 0.00 -0.03
19 3.0444 0.00 -0.01 0.00 -0.04
20 3.0444 0.00 -0.09 0.00 -0.31
21 3.0663 0.00 0.08 0.00 0.06
22 3.0663 0.00 0.06 0.00 -0.12
23 3.8582 0.00 -0.09 0.00 0.01
24 3.8718 0.00 0.17 0.00 0.04
25 3.8745 0.00 -0.00 0.00 -0.00
26 3.9209 0.00 0.19 0.00 0.08
27 3.9209 0.00 -0.03 0.00 0.12
28 3.9481 0.00 -0.08 0.00 0.12
29 5.0130 0.00 -0.10 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:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 43.376 43.376 43.376 ecceobj 0.202 0.202 0.202 incobj 11.604 11.604 11.604 qmin 32.094 33.886 32.244 qmax 61.750 52.981 59.130 amean 44.244 43.218 43.660 amin 42.236 42.650 42.231 amax 47.461 43.814 46.025 emean 0.231 0.188 0.222 emin 0.183 0.158 0.183 emax 0.303 0.214 0.289 imean 8.134 9.791 8.352 imin 3.731 7.928 4.012 imax 11.298 11.306 12.423 excite_mean 0.274 0.254 0.267 fracstop 1.000 1.000 1.000 cjmean 3.013 3.015 3.010 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 171.9 178.4 178.6 kozaiamp 179.9 180.0 180.0