Orbit Fit and Astrometric record for 16TP120

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: 16TP120   
# Created Thu Dec  9 02:13:59 2021
# Orbit generated from Bernstein formalism
# Fitting     11 observations of     11
# Arc:   3.22y
# First observation: 2016/10/07
#  Last observation: 2019/12/28
Preliminary a, adot, b, bdot, g, gdot:
  -0.000012   0.013793  -0.000015  -0.000049   0.016397   0.000000
# Chi-squared of fit:     5.32 DOF:     16 RMS:  0.12
# Min/Max residuals:    -0.28    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.396791E-05  1.346905E-02 -1.285831E-06 -5.090933E-05  1.603223E-02 -9.039670E-03
# Covariance matrix:
  7.2173E-13 -8.2350E-13  3.9684E-14 -6.4263E-14 -2.4534E-13 -2.0770E-11
 -8.2350E-13  2.3005E-11 -9.3666E-13  2.1137E-13  2.6312E-11  5.2185E-10
  3.9684E-14 -9.3666E-13  4.2547E-13 -1.5998E-13 -1.0550E-12 -2.1536E-11
 -6.4263E-14  2.1137E-13 -1.5998E-13  9.9279E-14  1.4526E-13  5.8101E-12
 -2.4534E-13  2.6312E-11 -1.0550E-12  1.4526E-13  3.1095E-11  5.9003E-10
 -2.0770E-11  5.2185E-10 -2.1536E-11  5.8101E-12  5.9003E-10  1.1975E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
  -33.099134   36.901172    0.383771   -0.506250   -0.776998  2457668.861129
# Heliocentric elements and errors
Epoch:              2457660.5000  =  2016/09/29
Mean Anomaly:          350.39672 +/-     0.524
Argument of Peri:      351.25910 +/-     0.095
Long of Asc Node:      126.79902 +/-     0.007
Inclination:            32.64188 +/-     0.000
Eccentricity:         0.76870300 +/-    0.0095
Semi-Major Axis:    171.86205310 +/-    6.2221
Time of Perihelion: 2479613.0840 +/-     106.4
Perihelion:          39.75117692 +/-    2.1753
Aphelion:           303.97292929 +/-   11.1253
Period (y)             2253.0882 +/-    122.36
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           42.75291239 +/-    0.0145
Ecliptic Y           31.62167314 +/-    0.0109
Ecliptic Z          -34.06208977 +/-    0.0118
Ecliptic XDOT        -0.00241710 +/-    0.0000
Ecliptic YDOT         0.00105315 +/-    0.0000
Ecliptic ZDOT         0.00083569 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   63.15035779 +/-    0.0129
Geocenter to KBO     62.37436186 +/-    0.0217
# Hcoef:  6.99

The following table shows the complete astrometric record for 16TP120. 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 (16TP120) followed by the observatory code and reference code for the source of the astrometry.

2016 10  07.36034  03 01 29.828  -17 30 51.62  25.0r 16TP120   807  C~3wqx      
2016 10  08.29639  03 01 27.292  -17 31 15.96  24.9r 16TP120   807  C~3wqx      
2017 11  22.06922  03 02 08.087  -17 27 28.51  24.9r 16TP120   304  C~3wqx      
2017 11  23.04722  03 02 04.859  -17 27 31.53  24.5r 16TP120   304  C~3wqx      
2017 12  13.12640  03 01 03.432  -17 26 22.45  25.1r 16TP120   304  C~3wqx      
2017 12  14.11899  03 01 00.733  -17 26 12.73  25.0r 16TP120   304  C~3wqx      
2017 12  15.17753  03 00 57.846  -17 26 01.39  25.0r 16TP120   304  C~3wqx      
2019 12  27.09362  03 06 42.664  -16 51 36.51        16TP120   304  C~3wqx      
2019 12  27.10854  03 06 42.642  -16 51 36.23        16TP120   304  C~3wqx      
2019 12  27.15452  03 06 42.536  -16 51 35.32        16TP120   304  C~3wqx      
2019 12  28.09751  03 06 40.426  -16 51 18.73        16TP120   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    -0.14       0.00     0.25
     2   0.0026    -42.32     0.10     -10.85    -0.03
     3   1.1245    583.77     0.04       8.66    -0.09
     4   1.1271    539.23     0.05      21.25    -0.08
     5   1.1821   -266.36     0.08     379.65    -0.03
     6   1.1848   -299.54     0.17     401.68    -0.23
     7   1.1877   -334.73    -0.28     426.12     0.07
     8   3.2190   5015.21    -0.11     708.10     0.01
     9   3.2190   5015.00     0.07     708.47    -0.03
    10   3.2191   5013.88     0.10     709.84     0.07
    11   3.2217   4991.02    -0.08     735.75     0.09

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.

16TP120    quality flag:1

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       178.554   200.414   161.536
ecceobj         0.775     0.802     0.748
incobj         32.635    32.636    32.635
qmin           38.027    37.474    37.353
qmax          323.961   370.081   288.580
amean         173.449   193.706   157.537
amin          168.681   187.443   153.536
amax          181.708   204.655   164.474
emean           0.770     0.797     0.746
emin            0.760     0.787     0.733
emax            0.783     0.808     0.763
imean          31.051    31.102    30.609
imin           30.136    30.260    29.039
imax           31.778    31.871    31.721
excite_mean     0.927     0.950     0.903
fracstop        1.000     1.000     1.000
cjmean          2.797     2.781     2.813

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        85.0      87.3      79.8
kozaiamp        180.0     180.0     180.0