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: 16TR120 # Created Mon Apr 28 01:11:01 2025 # Orbit generated from Bernstein formalism # Fitting 6 observations of 6 # Arc: 1.19y # First observation: 2016/10/09 # Last observation: 2017/12/17 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.011236 0.000000 -0.003077 0.016010 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 6.93 DOF: 7 RMS: 0.19 # Min/Max residuals: -0.36 0.39 # Exact a, adot, b, bdot, g, gdot: 1.152819E-05 1.130106E-02 -2.729643E-06 -3.092301E-03 1.610645E-02 -8.778396E-04 # Covariance matrix: 1.7804E-12 8.4261E-11 -4.2867E-14 -2.3251E-11 1.2250E-10 6.6054E-09 8.4261E-11 6.8915E-09 -3.4366E-12 -1.8876E-09 9.9427E-09 5.3563E-07 -4.2867E-14 -3.4366E-12 7.3627E-13 2.9982E-13 -4.9551E-12 -2.7403E-10 -2.3251E-11 -1.8876E-09 2.9982E-13 5.1794E-10 -2.7236E-09 -1.4666E-07 1.2250E-10 9.9427E-09 -4.9551E-12 -2.7236E-09 1.4347E-08 7.7283E-07 6.6054E-09 5.3563E-07 -2.7403E-10 -1.4666E-07 7.7283E-07 4.1717E-05 # lat0 lon0 xBary yBary zBary JD0 -29.892849 12.811459 -0.059696 -0.498911 -0.868287 2457670.695799 # Heliocentric elements and errors Epoch: 2457670.5000 = 2016/10/09 Mean Anomaly: 209.81164 +/- 144.065 Argument of Peri: 43.45943 +/- 142.353 Long of Asc Node: 131.95307 +/- 0.419 Inclination: 32.85538 +/- 0.102 Eccentricity: 0.17425046 +/- 0.1654 Semi-Major Axis: 54.39870171 +/- 3.9684 Time of Perihelion: 2518809.0326 +/- 58263.1 Perihelion: 44.91970273 +/- 9.5746 Aphelion: 63.87770070 +/- 10.1316 Period (y) 401.2278 +/- 43.90 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 53.44622843 +/- 0.3903 Ecliptic Y 12.21332407 +/- 0.0887 Ecliptic Z -30.94304124 +/- 0.2301 Ecliptic XDOT -0.00080562 +/- 0.0009 Ecliptic YDOT 0.00177955 +/- 0.0002 Ecliptic ZDOT -0.00038138 +/- 0.0005 # Distances at JD0 (AU) Heliocenter to KBO 62.95344644 +/- 0.3506 Geocenter to KBO 62.08692359 +/- 0.4617 # Hcoef: 6.87
The following table shows the complete astrometric record for 16TR120. 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 (16TR120) followed by the observatory code and reference code for the source of the astrometry.
2016 10 09.19501 01 35 36.054 -22 22 56.25 24.8r 16TR120 807 C~3wqx 2016 10 10.23333 01 35 32.596 -22 23 17.56 24.7r 16TR120 807 C~3wqx 2017 11 23.08706 01 36 04.432 -22 22 48.50 24.9r 16TR120 304 C~3wqx 2017 11 23.21443 01 36 04.097 -22 22 48.26 24.8r 16TR120 304 C~3wqx 2017 12 16.04745 01 35 15.000 -22 18 25.30 16TR120 304 C~3wqx 2017 12 17.04118 01 35 13.466 -22 18 07.20 16TR120 304 C~3wqx
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 -0.09 0.00 -0.06
2 0.0028 -52.48 0.07 0.77 0.04
3 1.1222 360.49 0.18 -158.21 0.39
4 1.1226 356.37 0.19 -156.04 -0.02
5 1.1851 -151.61 0.01 368.44 -0.19
6 1.1878 -163.35 -0.36 393.80 -0.16
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.
16TR120 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0