Orbit Fit and Astrometric record for 16TM176

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: 16TM176   
# Created Sat Nov 27 02:14:04 2021
# Orbit generated from Bernstein formalism
# Fitting     18 observations of     18
# Arc:   2.15y
# First observation: 2016/10/01
#  Last observation: 2018/11/27
Preliminary a, adot, b, bdot, g, gdot:
   0.000112   0.032801   0.000040   0.008389   0.029151   0.000000
# Chi-squared of fit:     3.92 DOF:     30 RMS:  0.08
# Min/Max residuals:    -0.14    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.806708E-05  3.326349E-02  5.053797E-06  8.569773E-03  2.891019E-02  7.512989E-03
# Covariance matrix:
  2.0655E-13 -2.9606E-13  1.1172E-14 -5.9298E-14  4.8594E-15 -3.4967E-12
 -2.9606E-13  1.3881E-12 -7.5916E-14  3.9787E-13  3.0505E-13  2.3683E-11
  1.1172E-14 -7.5916E-14  1.8548E-13 -1.4870E-13 -3.6151E-15 -1.5136E-12
 -5.9298E-14  3.9787E-13 -1.4870E-13  2.9072E-13 -2.7416E-15  8.0124E-12
  4.8594E-15  3.0505E-13 -3.6151E-15 -2.7416E-15  1.4541E-12  7.9372E-13
 -3.4967E-12  2.3683E-11 -1.5136E-12  8.0124E-12  7.9372E-13  4.7343E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -8.461896    4.222766   -0.072420   -0.147340   -0.991690  2457662.684179
# Heliocentric elements and errors
Epoch:              2457660.5000  =  2016/09/29
Mean Anomaly:           20.26616 +/-     0.030
Argument of Peri:      283.20706 +/-     0.075
Long of Asc Node:       33.36968 +/-     0.001
Inclination:            16.58578 +/-     0.001
Eccentricity:         0.38706373 +/-    0.0007
Semi-Major Axis:     52.95324394 +/-    0.0369
Time of Perihelion: 2449737.1981 +/-       8.4
Perihelion:          32.45696377 +/-    0.0414
Aphelion:            73.44952411 +/-    0.0618
Period (y)              385.3426 +/-      0.40
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.11136697 +/-    0.0014
Ecliptic Y            2.66263900 +/-    0.0001
Ecliptic Z           -5.08981782 +/-    0.0002
Ecliptic XDOT         0.00059086 +/-    0.0000
Ecliptic YDOT         0.00319531 +/-    0.0000
Ecliptic ZDOT         0.00069800 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.57813911 +/-    0.0014
Geocenter to KBO     34.58988422 +/-    0.0014
# Hcoef:  7.30

The following table shows the complete astrometric record for 16TM176. 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 (16TM176) followed by the observatory code and reference code for the source of the astrometry.

2016 10  01.18339  00 28 58.173  -06 05 13.05  22.6r 16TM176   W84  C~55aS      
2016 10  01.18476  00 28 58.165  -06 05 12.92  22.6i 16TM176   W84  C~55aS      
2016 10  01.18613  00 28 58.159  -06 05 13.10  23.3g 16TM176   W84  C~55aS      
2016 10  02.18599  00 28 52.865  -06 05 40.51  23.0r 16TM176   W84  C~55aS      
2016 10  02.18735  00 28 52.861  -06 05 40.57  22.7i 16TM176   W84  C~55aS      
2016 10  02.18872  00 28 52.839  -06 05 40.58  23.4g 16TM176   W84  C~55aS      
2016 11  07.10292  00 26 00.184  -06 17 17.81  22.7z 16TM176   W84  C~55aS      
2017 09  24.29972  00 35 45.477  -04 49 41.55  22.7i 16TM176   W84  C~55aS      
2017 09  24.30111  00 35 45.465  -04 49 41.62  22.5r 16TM176   W84  C~55aS      
2017 09  24.30248  00 35 45.456  -04 49 41.71  22.8g 16TM176   W84  C~55aS      
2017 09  26.30580  00 35 35.042  -04 50 39.97  22.3i 16TM176   W84  C~55aS      
2017 09  26.30718  00 35 35.031  -04 50 40.21  23.4g 16TM176   W84  C~55aS      
2017 10  17.24068  00 33 46.196  -04 59 46.25  22.6r 16TM176   W84  C~55aS      
2017 10  27.14103  00 32 58.022  -05 03 04.55  22.2z 16TM176   W84  C~55aS      
2017 10  29.12247  00 32 48.909  -05 03 38.06  22.5z 16TM176   W84  C~55aS      
2018 10  19.11687  00 39 41.518  -03 49 15.14  22.6z 16TM176   W84  C~55aS      
2018 10  28.20932  00 38 57.425  -03 52 20.31  22.8i 16TM176   W84  C~55aS      
2018 11  27.08747  00 37 05.884  -03 56 59.46  23.6g 16TM176   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     0.03       0.00    -0.08
     2   0.0000     -0.06     0.08       0.17     0.08
     3   0.0000     -0.21     0.05       0.04    -0.06
     4   0.0027    -83.55     0.01       6.40     0.03
     5   0.0027    -83.63     0.05       6.37    -0.01
     6   0.0028    -83.94    -0.14       6.49     0.11
     7   0.1011  -2723.48    -0.06     392.46    -0.12
     8   0.9805   7390.48     0.02    1718.95     0.01
     9   0.9805   7390.28    -0.06    1718.95     0.01
    10   0.9805   7390.12    -0.10    1718.93    -0.02
    11   0.9860   7223.96     0.11    1728.04     0.05
    12   0.9860   7223.71    -0.03    1727.89    -0.11
    13   1.0433   5513.08     0.04    1880.01     0.15
    14   1.0704   4773.62    -0.14    1986.68    -0.01
    15   1.0758   4635.36     0.12    2010.50    -0.05
    16   2.0477  12092.85     0.08    3623.57     0.17
    17   2.0726  11411.97    -0.10    3719.54    -0.12
    18   2.1544   9766.97     0.04    4135.04    -0.07

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.

16TM176    quality flag:2

Type:       SCATNEAR  SCATNEAR   7:3EEEE

axisobj        53.625    53.754    53.498
ecceobj         0.394     0.396     0.392
incobj         16.537    16.538    16.537
qmin           31.973    31.927    31.972
qmax           77.902    77.104    75.283
amean          53.982    53.603    52.969
amin           52.706    52.771    52.161
amax           55.488    54.840    53.956
emean           0.386     0.383     0.384
emin            0.359     0.358     0.367
emax            0.409     0.406     0.397
imean          16.740    16.587    16.173
imin           15.520    15.181    15.729
imax           18.161    17.970    16.860
excite_mean     0.481     0.478     0.474
fracstop        1.000     1.000     1.000
cjmean          2.923     2.924     2.921

libcent 0      -180.0    -180.0     179.3
libamp  0      -180.0    -180.0     155.6
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       191.7     181.8     192.1
kozaiamp        179.9     180.0     180.0