Orbit Fit and Astrometric record for 05TH173

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: 05TH173   
# Created Tue Nov 30 02:10:25 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     18 observations of     18
# Arc:   1.00y
# First observation: 2004/12/03
#  Last observation: 2005/12/04
# Chi-squared of fit:    40.20 DOF:     30 RMS:  0.26
# Min/Max residuals:    -0.67    0.61
# Exact a, adot, b, bdot, g, gdot:
  2.691789E-05  1.135418E-01 -6.573595E-06 -2.747068E-02  6.764556E-02 -3.147961E-02
# Covariance matrix:
  4.8954E-13 -3.3963E-13  5.7877E-16 -3.5403E-14 -3.9658E-14  1.2941E-12
 -3.3963E-13  5.2536E-10  2.3291E-12 -1.2134E-10  1.7983E-10  4.4705E-09
  5.7877E-16  2.3291E-12  4.8949E-13 -1.0546E-12  8.0020E-13  1.9848E-11
 -3.5403E-14 -1.2134E-10 -1.0546E-12  2.8722E-11 -4.1640E-11 -1.0340E-09
 -3.9658E-14  1.7983E-10  8.0020E-13 -4.1640E-11  6.2601E-11  1.5342E-09
  1.2941E-12  4.4705E-09  1.9848E-11 -1.0340E-09  1.5342E-09  3.8094E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.720084    7.089949   -0.886959    0.005534   -0.432023  2453342.762369
# Heliocentric elements and errors
Epoch:              2453342.5000  =  2004/12/03
Mean Anomaly:          330.62578 +/-     0.091
Argument of Peri:      231.10742 +/-     0.198
Long of Asc Node:      193.34351 +/-     0.000
Inclination:            13.49605 +/-     0.001
Eccentricity:         0.30598177 +/-    0.0017
Semi-Major Axis:     19.82668740 +/-    0.0281
Time of Perihelion: 2455973.6007 +/-      63.5
Perihelion:          13.76008251 +/-    0.0395
Aphelion:            25.89329229 +/-    0.0502
Period (y)               88.2843 +/-      0.19
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           14.98369812 +/-    0.0017
Ecliptic Y            2.75888231 +/-    0.0002
Ecliptic Z            0.18568396 +/-    0.0000
Ecliptic XDOT        -0.00181850 +/-    0.0000
Ecliptic YDOT         0.00439755 +/-    0.0000
Ecliptic ZDOT        -0.00112767 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   15.23678816 +/-    0.0017
Geocenter to KBO     14.78309717 +/-    0.0017
# Hcoef: 11.62

The following table shows the complete astrometric record for 05TH173. 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 (05TH173) followed by the observatory code and reference code for the source of the astrometry.

2004 12  03.261626 00 24 54.01   +03 28 32.1   23.6i 05TH173   568  C~4q5U      
2004 12  03.317168 00 24 53.89   +03 28 30.5   23.6i 05TH173   568  C~4q5U      
2004 12  03.362690 00 24 53.81   +03 28 28.6         05TH173   568  C~4q5U      
2005 10  08.18820  01 00 04.20   +05 41 05.2   22.5R 05TH173   304  Co7771      
2005 10  08.22696  01 00 03.76   +05 41 01.5   22.4R 05TH173   304  Co7771      
2005 10  08.26516  01 00 03.33   +05 40 58.3   22.4R 05TH173   304  Co7771      
2005 10  25.15692  00 57 01.27   +05 17 04.2         05TH173   304  Co7771      
2005 10  25.20921  00 57 00.71   +05 17 00.1         05TH173   304  Co7771      
2005 11  02.274948 00 55 40.69   +05 06 23.3         05TH173   568  C~4q5U      
2005 11  02.288968 00 55 40.52   +05 06 22.1         05TH173   568  C~4q5U      
2005 11  02.302966 00 55 40.38   +05 06 21.1         05TH173   568  C~4q5U      
2005 11  02.317100 00 55 40.24   +05 06 20.0         05TH173   568  C~4q5U      
2005 11  02.331165 00 55 40.12   +05 06 18.9         05TH173   568  C~4q5U      
2005 12  04.14801  00 52 03.86   +04 35 34.5   23.7r 05TH173   695  C~4q5U      
2005 12  04.15273  00 52 03.85   +04 35 34.2   23.6r 05TH173   695  C~4q5U      
2005 12  04.15775  00 52 03.84   +04 35 34.3   23.6r 05TH173   695  C~4q5U      
2005 12  04.16255  00 52 03.81   +04 35 34.1   23.7r 05TH173   695  C~4q5U      
2005 12  04.16727  00 52 03.79   +04 35 33.9   23.5r 05TH173   695  C~4q5U      

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    -0.00
     2   0.0002      0.00    -0.07       0.00     0.21
     3   0.0003      0.00     0.19       0.00    -0.21
     4   0.8458      0.00     0.20       0.00     0.61
     5   0.8459      0.00     0.12       0.00     0.26
     6   0.8460      0.00     0.09       0.00     0.37
     7   0.8923      0.00    -0.42       0.00    -0.67
     8   0.8924      0.00    -0.54       0.00    -0.50
     9   0.9145      0.00     0.48       0.00    -0.01
    10   0.9145      0.00    -0.03       0.00    -0.15
    11   0.9146      0.00    -0.08       0.00    -0.09
    12   0.9146      0.00    -0.12       0.00    -0.12
    13   0.9146      0.00     0.13       0.00    -0.15
    14   1.0017      0.00    -0.03       0.00     0.05
    15   1.0018      0.00     0.08       0.00    -0.07
    16   1.0018      0.00     0.21       0.00     0.21
    17   1.0018      0.00     0.03       0.00     0.18
    18   1.0018      0.00    -0.00       0.00     0.15

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.

05TH173    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        20.017    20.017    20.017
ecceobj         0.310     0.310     0.310
incobj         13.453    13.453    13.453
qmin           13.682    13.809    13.809
qmax           26.545    26.282    26.283
amean          19.962    19.909    19.916
amin           19.757    19.685    19.622
amax           20.240    20.086    20.139
emean           0.292     0.285     0.280
emin            0.274     0.272     0.251
emax            0.315     0.310     0.310
imean          14.370    14.455    14.625
imin           13.428    13.428    13.428
imax           14.855    15.370    15.775
excite_mean     0.383     0.379     0.377
fracstop        0.006     0.005     0.005
cjmean          3.021     3.026     3.027

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       249.5     246.0     247.3
kozaiamp         23.2      18.2      18.8