Orbit Fit and Astrometric record for 16TR120

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 Tue Apr  1 01:11:00 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