Orbit Fit and Astrometric record for 15TG363

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: 15TG363   
# Created Thu Dec  9 02:13:31 2021
# Orbit generated from Bernstein formalism
# Fitting     14 observations of     14
# Arc:   0.97y
# First observation: 2015/10/10
#  Last observation: 2016/09/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000001   0.020390   0.000000  -0.000162   0.022114   0.000000
# Chi-squared of fit:     0.59 DOF:     22 RMS:  0.04
# Min/Max residuals:    -0.06    0.08
# Exact a, adot, b, bdot, g, gdot:
  1.416719E-05  2.037634E-02 -5.697460E-08 -1.607483E-04  2.212383E-02 -1.331580E-03
# Covariance matrix:
  5.1534E-13  1.3889E-11  1.3691E-14 -5.6151E-14  9.7873E-12  6.8229E-10
  1.3889E-11  5.3222E-09  1.4151E-12  1.3763E-11  1.1326E-09  2.3240E-07
  1.3691E-14  1.4151E-12  1.8668E-13 -1.9321E-13  5.3237E-13  6.4090E-11
 -5.6151E-14  1.3763E-11 -1.9321E-13  5.2771E-13  7.7713E-13  5.7970E-10
  9.7873E-12  1.1326E-09  5.3237E-13  7.7713E-13  3.9888E-10  5.1024E-08
  6.8229E-10  2.3240E-07  6.4090E-11  5.7970E-10  5.1024E-08  1.0164E-05
#      lat0       lon0       xBary       yBary       zBary        JD0
  -15.949033   26.247882    0.167598   -0.271413   -0.950332  2457305.986387
# Heliocentric elements and errors
Epoch:              2457300.5000  =  2015/10/05
Mean Anomaly:          267.64325 +/-    19.926
Argument of Peri:        8.58166 +/-    17.615
Long of Asc Node:      117.94417 +/-     0.187
Inclination:            15.62126 +/-     0.001
Eccentricity:         0.07108162 +/-    0.1532
Semi-Major Axis:     45.78598661 +/-    0.7607
Time of Perihelion: 2486331.5956 +/-    6221.6
Perihelion:          42.53144459 +/-    7.0494
Aphelion:            49.04052862 +/-    7.0611
Period (y)              309.8183 +/-      7.72
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           39.93562152 +/-    0.0352
Ecliptic Y           19.50702656 +/-    0.0173
Ecliptic Z          -12.42020205 +/-    0.0112
Ecliptic XDOT        -0.00126384 +/-    0.0003
Ecliptic YDOT         0.00218256 +/-    0.0002
Ecliptic ZDOT         0.00002620 +/-    0.0001
# Distances at JD0 (AU)
Heliocenter to KBO   46.14801589 +/-    0.0315
Geocenter to KBO     45.20012670 +/-    0.0408
# Hcoef:  7.88

The following table shows the complete astrometric record for 15TG363. 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 (15TG363) followed by the observatory code and reference code for the source of the astrometry.

2015 10  10.485598 02 00 18.617  -04 45 31.48  24.2r 15TG363   568  C~2TuW      
2015 10  10.490606 02 00 18.590  -04 45 31.66  24.3r 15TG363   568  C~2TuW      
2015 10  10.590069 02 00 18.177  -04 45 34.33  24.4r 15TG363   568  C~2TuW      
2015 10  14.472157 02 00 02.265  -04 47 16.29  24.9g 15TG363   568  C~2TuW      
2015 10  14.477123 02 00 02.238  -04 47 16.44  24.9g 15TG363   568  C~2TuW      
2015 10  14.493297 02 00 02.174  -04 47 16.91  25.0g 15TG363   568  C~2TuW      
2015 10  14.500241 02 00 02.143  -04 47 17.08  25.0g 15TG363   568  C~2TuW      
2015 10  14.591882 02 00 01.754  -04 47 19.38  24.8g 15TG363   568  C~2TuW      
2016 09  27.42366  02 05 28.98   -04 15 11.0   24.9g 15TG363   568  C~2eAH      
2016 09  27.54339  02 05 28.54   -04 15 14.5   24.8g 15TG363   568  C~2eAH      
2016 09  28.43258  02 05 25.30   -04 15 40.4   24.7g 15TG363   568  C~2eAH      
2016 09  28.50482  02 05 25.03   -04 15 42.5   25.4g 15TG363   568  C~2eAH      
2016 09  28.55228  02 05 24.86   -04 15 43.9   25.1g 15TG363   568  C~2eAH      
2016 09  29.56380  02 05 21.12   -04 16 13.2   25.0g 15TG363   568  C~2eAH      

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     0.08       0.00    -0.01
     2   0.0000     -0.44    -0.02      -0.02    -0.02
     3   0.0003     -7.16    -0.06      -0.31    -0.01
     4   0.0109   -265.75     0.07     -10.37     0.02
     5   0.0109   -266.18    -0.03     -10.37     0.04
     6   0.0110   -267.24     0.01     -10.46    -0.04
     7   0.0110   -267.74    -0.01     -10.46    -0.02
     8   0.0112   -273.99    -0.04     -10.52     0.05
     9   0.9663   4986.17    -0.02      33.85     0.03
    10   0.9666   4978.77     0.02      32.95     0.01
    11   0.9691   4924.20    -0.04      26.22     0.02
    12   0.9693   4919.67    -0.04      25.71     0.02
    13   0.9694   4916.80     0.07      25.32    -0.05
    14   0.9722   4854.02     0.01      18.09    -0.02

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.

15TG363    quality flag:1

Type:       SCATEXTD  CENTAURR CLASSICAL

axisobj        46.276    59.313    45.881
ecceobj         0.068     0.493     0.035
incobj         15.619    15.614    15.619
qmin           41.968    29.337    43.110
qmax           50.229    88.562    48.241
amean          45.967    57.919    45.578
amin           45.593    57.156    45.221
amax           46.361    59.313    45.946
emean           0.072     0.485     0.040
emin            0.062     0.475     0.030
emax            0.084     0.495     0.050
imean          14.075    14.169    14.088
imin           13.753    14.011    13.777
imax           14.401    14.287    14.409
excite_mean     0.254     0.543     0.247
fracstop        1.000     0.003     1.000
cjmean          3.046     2.873     3.045

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       171.2       5.8     176.1
kozaiamp        179.9       2.3     179.9