Orbit Fit and Astrometric record for 16TL176

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: 16TL176   
# Created Tue Nov 30 02:14:02 2021
# Orbit generated from Bernstein formalism
# Fitting      9 observations of      9
# Arc:   3.07y
# First observation: 2015/10/22
#  Last observation: 2018/11/15
Preliminary a, adot, b, bdot, g, gdot:
   0.000131   0.030129   0.000024  -0.000628   0.027659   0.000000
# Chi-squared of fit:     4.77 DOF:     12 RMS:  0.13
# Min/Max residuals:    -0.17    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.791519E-05  3.043243E-02  4.560518E-07 -5.955871E-04  2.723231E-02  2.941394E-03
# Covariance matrix:
  1.3078E-12 -1.5321E-12 -1.0525E-14  1.9623E-14 -7.6551E-13 -1.3018E-11
 -1.5321E-12  2.5563E-12 -1.6479E-15 -1.2039E-14  8.8544E-13  2.6451E-11
 -1.0525E-14 -1.6479E-15  6.3424E-13 -3.2643E-13  6.9488E-14 -1.7634E-13
  1.9623E-14 -1.2039E-14 -3.2643E-13  2.2769E-13 -8.7035E-14  4.8887E-14
 -7.6551E-13  8.8544E-13  6.9488E-14 -8.7035E-14  2.2255E-12  5.7938E-12
 -1.3018E-11  2.6451E-11 -1.7634E-13  4.8887E-14  5.7938E-12  3.0953E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -21.750050    8.929601   -0.328790   -0.349385   -0.876289  2457317.645969
# Heliocentric elements and errors
Epoch:              2457310.5000  =  2015/10/15
Mean Anomaly:           21.66032 +/-     0.080
Argument of Peri:      233.33053 +/-     0.141
Long of Asc Node:      102.22235 +/-     0.003
Inclination:            21.24095 +/-     0.000
Eccentricity:         0.22089871 +/-    0.0005
Semi-Major Axis:     46.75537331 +/-    0.0169
Time of Perihelion: 2450284.5017 +/-      25.7
Perihelion:          36.42717158 +/-    0.0253
Aphelion:            57.08357505 +/-    0.0299
Period (y)              319.7095 +/-      0.17
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           34.57066321 +/-    0.0018
Ecliptic Y            5.76506180 +/-    0.0003
Ecliptic Z          -13.60733337 +/-    0.0007
Ecliptic XDOT        -0.00022705 +/-    0.0000
Ecliptic YDOT         0.00305508 +/-    0.0000
Ecliptic ZDOT        -0.00016515 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.59689101 +/-    0.0017
Geocenter to KBO     36.72109106 +/-    0.0020
# Hcoef:  8.28

The following table shows the complete astrometric record for 16TL176. 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 (16TL176) followed by the observatory code and reference code for the source of the astrometry.

2015 10  22.14518  01 07 48.343  -16 25 02.65  24.0i 16TL176   W84  C~55aS      
2016 10  02.20569  01 16 03.979  -15 35 19.28  23.6i 16TL176   W84  C~55aS      
2016 10  02.20708  01 16 03.975  -15 35 18.97  23.7r 16TL176   W84  C~55aS      
2016 10  23.14689  01 14 17.590  -15 44 28.25  24.5r 16TL176   W84  C~55aS      
2016 10  23.14827  01 14 17.601  -15 44 28.03  24.2g 16TL176   W84  C~55aS      
2017 09  25.24972  01 23 11.212  -14 49 17.32  23.8r 16TL176   W84  C~55aS      
2017 11  16.11634  01 18 59.694  -15 06 52.58  23.7i 16TL176   W84  C~55aS      
2017 11  23.09948  01 18 32.464  -15 06 31.37  24.3r 16TL176   W84  C~55aS      
2018 11  15.21490  01 25 31.168  -14 25 11.27  23.9i 16TL176   W84  C~55aS      

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    -0.05       0.00    -0.17
     2   0.9475   7743.82    -0.16    -244.95    -0.17
     3   0.9475   7743.90     0.03    -244.64     0.13
     4   1.0048   6116.59    -0.04    -101.71     0.09
     5   1.0048   6116.82     0.30    -101.58     0.20
     6   1.9277  14536.15    -0.00    -354.30    -0.09
     7   2.0697  10773.53     0.02     236.17    -0.03
     8   2.0889  10423.97    -0.15     421.83     0.11
     9   3.0666  17004.94     0.04      86.56    -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.

16TL176    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        47.342    47.400    47.285
ecceobj         0.230     0.231     0.229
incobj         21.247    21.247    21.247
qmin           35.702    35.652    35.749
qmax           58.861    58.997    58.709
amean          47.033    47.091    46.976
amin           46.603    46.658    46.553
amax           47.569    47.612    47.501
emean           0.221     0.222     0.220
emin            0.205     0.205     0.204
emax            0.239     0.241     0.237
imean          19.647    19.645    19.647
imin           19.194    19.193    19.201
imax           20.252    20.257    20.247
excite_mean     0.402     0.403     0.402
fracstop        1.000     1.000     1.000
cjmean          2.936     2.936     2.936

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       189.1     187.2     190.5
kozaiamp        180.0     180.0     180.0