Orbit Fit and Astrometric record for 16TO120

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: 16TO120   
# Created Sat Dec  4 02:13:58 2021
# Orbit generated from Bernstein formalism
# Fitting      9 observations of      9
# Arc:   1.20y
# First observation: 2016/10/06
#  Last observation: 2017/12/17
Preliminary a, adot, b, bdot, g, gdot:
  -0.000020   0.012200  -0.000001   0.004543   0.016872   0.000000
# Chi-squared of fit:    23.10 DOF:     12 RMS:  0.28
# Min/Max residuals:    -0.47    0.55
# Exact a, adot, b, bdot, g, gdot:
  1.150834E-05  1.228705E-02  3.018252E-06  4.590506E-03  1.702148E-02  4.182854E-03
# Covariance matrix:
  4.1819E-13 -1.3236E-13 -5.9581E-14  6.6977E-13  6.5431E-13  9.1503E-11
 -1.3236E-13  2.5885E-12  3.0484E-13 -5.6427E-12 -1.3190E-12 -7.1548E-10
 -5.9581E-14  3.0484E-13  3.3594E-13 -1.6876E-12 -5.7666E-13 -1.8549E-10
  6.6977E-13 -5.6427E-12 -1.6876E-12  2.4643E-11  8.7196E-12  3.0700E-09
  6.5431E-13 -1.3190E-12 -5.7666E-13  8.7196E-12  4.2847E-12  1.1353E-09
  9.1503E-11 -7.1548E-10 -1.8549E-10  3.0700E-09  1.1353E-09  3.9479E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
  -26.560944   33.313065    0.343593   -0.421624   -0.843851  2457667.722449
# Heliocentric elements and errors
Epoch:              2457660.5000  =  2016/09/29
Mean Anomaly:           76.28702 +/-     6.708
Argument of Peri:      194.20512 +/-     2.910
Long of Asc Node:       83.08812 +/-     0.007
Inclination:            32.61026 +/-     0.003
Eccentricity:         0.30163494 +/-    0.0400
Semi-Major Axis:     58.49798586 +/-    1.5492
Time of Perihelion: 2423030.0671 +/-    2716.5
Perihelion:          40.85294959 +/-    2.5762
Aphelion:            76.14302212 +/-    3.0875
Period (y)              447.4243 +/-     17.77
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           44.88726391 +/-    0.0054
Ecliptic Y           29.08873725 +/-    0.0035
Ecliptic Z          -26.26959628 +/-    0.0032
Ecliptic XDOT        -0.00030469 +/-    0.0001
Ecliptic YDOT         0.00215657 +/-    0.0000
Ecliptic ZDOT         0.00035956 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   59.59121399 +/-    0.0046
Geocenter to KBO     58.74928690 +/-    0.0071
# Hcoef:  7.25

The following table shows the complete astrometric record for 16TO120. 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 (16TO120) followed by the observatory code and reference code for the source of the astrometry.

2016 10  06.22166  02 40 14.720  -12 24 22.95  24.7r 16TO120   807  C~3wqx      
2016 10  06.35279  02 40 14.328  -12 24 26.24  25.1r 16TO120   807  C~3wqx      
2016 10  07.30456  02 40 11.403  -12 24 47.44  25.0r 16TO120   807  C~3wqx      
2016 11  02.15252  02 38 43.323  -12 32 31.19        16TO120   304  C~3wqx      
2016 11  03.09333  02 38 39.958  -12 32 42.58        16TO120   304  C~3wqx      
2016 12  30.08905  02 35 51.514  -12 29 07.36        16TO120   304  C~3wqx      
2016 12  30.16511  02 35 51.357  -12 29 05.99        16TO120   304  C~3wqx      
2017 12  16.12131  02 38 41.970  -12 04 02.35        16TO120   304  C~3wqx      
2017 12  17.13194  02 38 39.384  -12 03 50.22        16TO120   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    -0.02       0.00     0.26
     2   0.0004     -6.52     0.14      -1.14    -0.10
     3   0.0030    -54.03     0.55      -6.49     0.29
     4   0.0737  -1424.87    -0.41      -4.50     0.04
     5   0.0763  -1475.08    -0.47       1.48     0.06
     6   0.2324  -3724.51     0.26    1037.23    -0.33
     7   0.2326  -3726.21    -0.06    1039.29    -0.35
     8   1.1934   -864.19     0.26    1609.92    -0.19
     9   1.1962   -895.77    -0.24    1634.19     0.32

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.

16TO120    quality flag:1

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        59.293    65.375    55.896
ecceobj         0.301     0.418     0.190
incobj         32.553    32.550    32.555
qmin           39.616    36.011    42.521
qmax           78.956    94.989    69.214
amean          58.873    64.796    55.597
amin           58.283    64.063    55.063
amax           59.635    65.837    56.222
emean           0.309     0.425     0.210
emin            0.293     0.407     0.186
emax            0.325     0.443     0.233
imean          30.878    30.652    30.792
imin           30.520    30.124    30.388
imax           31.314    31.383    31.266
excite_mean     0.599     0.664     0.553
fracstop        1.000     1.000     1.000
cjmean          2.795     2.749     2.825

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       180.8     182.0     201.1
kozaiamp        179.9     180.0     179.9