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: 99SA28 # Created Wed Apr 24 01:09:58 2024 # Orbit generated from Bernstein formalism # Fitting 6 observations of 6 # Arc: 23.86h # First observation: 1999/09/16 # Last observation: 1999/09/17 # WARNING Fitting with energy constraint # WARNING and with gdot fixed = 0 # Chi-squared of fit: 2.85 DOF: 8 RMS: 0.12 # Min/Max residuals: -0.20 0.20 # Exact a, adot, b, bdot, g, gdot: 1.746372E-05 3.526469E-02 6.554054E-07 1.942066E-03 3.161975E-02 0.000000E+00 # Covariance matrix: 4.9308E-11 9.7423E-08 3.1357E-12 6.2831E-09 1.6500E-08 0.0000E+00 9.7423E-08 1.9445E-04 6.2469E-09 1.2517E-05 3.2870E-05 0.0000E+00 3.1357E-12 6.2469E-09 5.4686E-13 2.8485E-10 1.0567E-09 0.0000E+00 6.2831E-09 1.2517E-05 2.8485E-10 9.4287E-07 2.1174E-06 0.0000E+00 1.6500E-08 3.2870E-05 1.0567E-09 2.1174E-06 5.5603E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 4.1600E-04 # lat0 lon0 xBary yBary zBary JD0 10.999482 -24.228538 -0.292738 0.181840 -0.936772 2451437.791233 # Heliocentric elements and errors Epoch: 2451430.5000 = 1999/09/09 Mean Anomaly: 10.65748 +/- 219.413 Argument of Peri: 62.67736 +/- 287.162 Long of Asc Node: 262.46779 +/- 3.326 Inclination: 11.10536 +/- 0.176 Eccentricity: 0.03394690 +/- 0.5868 Semi-Major Axis: 33.69297938 +/- 18.0399 Time of Perihelion: 2449315.7471 +/- 186399.0 Perihelion: 32.54920701 +/- 26.3562 Aphelion: 34.83675175 +/- 27.1816 Period (y) 195.5768 +/- 157.07 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 29.30846007 +/- 2.1112 Ecliptic Y -12.86227633 +/- 0.9503 Ecliptic Z 6.03424884 +/- 0.4500 Ecliptic XDOT 0.00121961 +/- 0.0016 Ecliptic YDOT 0.00280593 +/- 0.0011 Ecliptic ZDOT 0.00016513 +/- 0.0003 # Distances at JD0 (AU) Heliocenter to KBO 32.57047962 +/- 1.9382 Geocenter to KBO 31.62580101 +/- 2.3585 # Hcoef: 7.17
The following table shows the complete astrometric record for 99SA28. 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 (99SA28) followed by the observatory code and reference code for the source of the astrometry.
1999 09 16.29049 22 14 10.08 +00 50 56.1 23.1 99SA28 568 Cd1603 1999 09 16.29854 22 14 10.04 +00 50 55.9 23.2 99SA28 568 Cd1603 1999 09 16.30659 22 14 09.99 +00 50 55.2 99SA28 568 Cd1603 1999 09 17.26864 22 14 04.99 +00 50 20.3 99SA28 568 Cd1604 1999 09 17.27659 22 14 04.96 +00 50 20.1 99SA28 568 Cd1604 1999 09 17.28460 22 14 04.93 +00 50 19.9 99SA28 568 Cd1604
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 0.04 0.00 0.07
2 0.0000 -0.63 0.11 0.03 0.14
3 0.0000 -1.58 -0.14 -0.35 -0.20
4 0.0027 -84.13 -0.20 -5.67 -0.02
5 0.0027 -84.62 -0.00 -5.69 0.00
6 0.0027 -85.11 0.20 -5.71 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.
99SA28 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