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: 99CT153 # Created Fri Nov 1 01:07:53 2024 # Orbit generated from Bernstein formalism # Fitting 6 observations of 6 # Arc: 3.10y # First observation: 1999/02/11 # Last observation: 2002/03/20 Preliminary a, adot, b, bdot, g, gdot: -0.000001 0.024371 0.000003 0.001941 0.024810 0.000000 # Chi-squared of fit: 9.51 DOF: 6 RMS: 0.22 # Min/Max residuals: -0.50 0.50 # Exact a, adot, b, bdot, g, gdot: 1.521955E-05 2.508564E-02 1.451153E-06 2.011488E-03 2.492891E-02 1.220319E-02 # Covariance matrix: 7.4530E-13 1.3628E-11 -5.4926E-14 1.3323E-12 3.9198E-12 2.1831E-10 1.3628E-11 2.0778E-08 -8.4111E-11 2.0373E-09 3.9290E-09 3.3379E-07 -5.4926E-14 -8.4111E-11 7.1837E-13 -8.3726E-12 -1.5902E-11 -1.3512E-09 1.3323E-12 2.0373E-09 -8.3726E-12 1.9988E-10 3.8518E-10 3.2729E-08 3.9198E-12 3.9290E-09 -1.5902E-11 3.8518E-10 7.4781E-10 6.3109E-08 2.1831E-10 3.3379E-07 -1.3512E-09 3.2729E-08 6.3109E-08 5.3623E-06 # lat0 lon0 xBary yBary zBary JD0 -0.188323 161.252115 0.317038 -0.003328 -0.941601 2451221.023253 # Heliocentric elements and errors Epoch: 2451220.5000 = 1999/02/11 Mean Anomaly: 29.92023 +/- 6.948 Argument of Peri: 274.60487 +/- 0.196 Long of Asc Node: 163.10289 +/- 0.001 Inclination: 4.58096 +/- 0.002 Eccentricity: 0.51153507 +/- 0.0997 Semi-Major Axis: 59.01792089 +/- 8.6593 Time of Perihelion: 2437456.7519 +/- 1020.3 Perihelion: 28.82818458 +/- 7.2456 Aphelion: 89.20765721 +/- 14.3501 Period (y) 453.4027 +/- 99.79 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -38.76714449 +/- 0.0417 Ecliptic Y 13.49512582 +/- 0.0141 Ecliptic Z -0.13177915 +/- 0.0001 Ecliptic XDOT -0.00215699 +/- 0.0002 Ecliptic YDOT -0.00216889 +/- 0.0001 Ecliptic ZDOT 0.00021651 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.04908377 +/- 0.0396 Geocenter to KBO 40.11406398 +/- 0.0440 # Hcoef: 7.80
The following table shows the complete astrometric record for 99CT153. 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 (99CT153) followed by the observatory code and reference code for the source of the astrometry.
1999 02 11.52251 10 50 31.45 +07 10 15.6 23.9R 99CT153 568 Ca4208 1999 02 11.60642 10 50 31.06 +07 10 18.0 23.9R 99CT153 568 Ca4208 1999 03 15.51731 10 48 05.41 +07 25 44.3 23.9R 99CT153 568 Ca4208 1999 03 15.57045 10 48 05.15 +07 25 45.8 23.9R 99CT153 568 Ca4208 2002 03 20.22230 11 03 48.298 +06 10 39.59 22.4R 99CT153 695 2002 03 20.34667 11 03 47.694 +06 10 43.49 99CT153 695
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 0.14 0.00 -0.04
2 0.0002 -6.28 -0.15 0.02 -0.06
3 0.0876 -2362.82 0.13 35.86 0.11
4 0.0877 -2366.97 -0.13 35.78 -0.01
5 3.1012 12351.03 0.50 1242.75 -0.03
6 3.1015 12341.18 -0.50 1242.87 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.
99CT153 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0