Orbit Fit and Astrometric record for 16TN120

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: 16TN120   
# Created Wed Dec  8 02:14:02 2021
# Orbit generated from Bernstein formalism
# Fitting     11 observations of     11
# Arc:   1.19y
# First observation: 2016/10/06
#  Last observation: 2017/12/14
Preliminary a, adot, b, bdot, g, gdot:
   0.000002   0.012345  -0.000006  -0.001194   0.016654   0.000000
# Chi-squared of fit:     8.67 DOF:     16 RMS:  0.16
# Min/Max residuals:    -0.28    0.35
# Exact a, adot, b, bdot, g, gdot:
  1.092564E-05  1.240231E-02 -1.244939E-06 -1.203472E-03  1.676010E-02 -1.070417E-03
# Covariance matrix:
  5.7903E-13  6.2127E-14 -6.1877E-14  6.2714E-15  7.7305E-13  5.2278E-11
  6.2127E-14  1.0091E-12 -7.7268E-14  2.7782E-14  1.0120E-12  9.0542E-11
 -6.1877E-14 -7.7268E-14  3.0929E-13 -2.8690E-13 -1.6999E-13 -1.1887E-11
  6.2714E-15  2.7782E-14 -2.8690E-13  5.0909E-13  3.3353E-14  7.8439E-12
  7.7305E-13  1.0120E-12 -1.6999E-13  3.3353E-14  2.1615E-12  1.6404E-10
  5.2278E-11  9.0542E-11 -1.1887E-11  7.8439E-12  1.6404E-10  1.8449E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
  -29.389276   24.644026    0.196026   -0.482998   -0.857983  2457667.807539
# Heliocentric elements and errors
Epoch:              2457660.5000  =  2016/09/29
Mean Anomaly:          215.51912 +/-     2.745
Argument of Peri:       54.27783 +/-     2.694
Long of Asc Node:      125.97433 +/-     0.011
Inclination:            29.43234 +/-     0.001
Eccentricity:         0.17632736 +/-    0.0040
Semi-Major Axis:     52.53383397 +/-    0.0812
Time of Perihelion: 2513477.3009 +/-    1052.6
Perihelion:          43.27068148 +/-    0.2190
Aphelion:            61.79698645 +/-    0.2294
Period (y)              380.7736 +/-      0.88
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           48.22449682 +/-    0.0042
Ecliptic Y           21.90707846 +/-    0.0019
Ecliptic Z          -29.28041318 +/-    0.0026
Ecliptic XDOT        -0.00106904 +/-    0.0000
Ecliptic YDOT         0.00173083 +/-    0.0000
Ecliptic ZDOT        -0.00008552 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   60.52160586 +/-    0.0036
Geocenter to KBO     59.66552528 +/-    0.0052
# Hcoef:  6.33

The following table shows the complete astrometric record for 16TN120. 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 (16TN120) followed by the observatory code and reference code for the source of the astrometry.

2016 10  06.30675  02 14 52.578  -17 48 06.82  24.3r 16TN120   807  C~3wqx      
2016 10  07.25680  02 14 49.517  -17 48 30.57  24.1r 16TN120   807  C~3wqx      
2016 11  02.13545  02 13 21.401  -17 56 37.91        16TN120   304  C~3wqx      
2016 11  03.07828  02 13 18.126  -17 56 49.21        16TN120   304  C~3wqx      
2016 12  30.07040  02 10 47.098  -17 51 33.09        16TN120   304  C~3wqx      
2016 12  30.15075  02 10 46.989  -17 51 31.49        16TN120   304  C~3wqx      
2017 10  18.25221  02 17 05.712  -17 40 10.39  24.0r 16TN120   304  C~3wqx      
2017 10  18.32453  02 17 05.434  -17 40 11.87  23.9r 16TN120   304  C~3wqx      
2017 12  13.06681  02 14 08.919  -17 44 26.07        16TN120   304  C~3wqx      
2017 12  13.17679  02 14 08.660  -17 44 24.90        16TN120   304  C~3wqx      
2017 12  14.06042  02 14 06.614  -17 44 13.36        16TN120   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     0.16       0.00     0.02
     2   0.0026    -49.46    -0.28      -5.37     0.11
     3   0.0735  -1398.27     0.10      20.04    -0.13
     4   0.0760  -1445.82     0.01      27.24    -0.20
     5   0.2321  -3324.52     0.06    1131.28     0.20
     6   0.2323  -3325.36    -0.03    1133.35     0.05
     7   1.0320   1940.18     0.15    -284.41    -0.16
     8   1.0322   1935.94    -0.22    -284.25    -0.03
     9   1.1848   -493.31     0.13     440.79    -0.02
    10   1.1851   -496.30     0.08     443.27    -0.20
    11   1.1876   -518.98    -0.16     465.03     0.35

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.

16TN120    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        53.140    53.411    52.947
ecceobj         0.164     0.178     0.154
incobj         29.420    29.418    29.422
qmin           42.893    42.252    43.362
qmax           63.116    64.394    62.300
amean          52.808    53.097    52.626
amin           52.335    52.619    52.162
amax           53.325    53.644    53.145
emean           0.171     0.186     0.160
emin            0.157     0.171     0.147
emax            0.185     0.201     0.172
imean          27.961    27.927    27.980
imin           27.724    27.665    27.765
imax           28.256    28.267    28.245
excite_mean     0.499     0.504     0.496
fracstop        1.000     1.000     1.000
cjmean          2.876     2.874     2.878

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       163.0     161.2     165.0
kozaiamp        179.9     180.0     179.9