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: 02CA249 # Created Sun Dec 22 02:08:21 2024 # Orbit generated from Bernstein formalism # Fitting 4 observations of 4 # Arc: 36.97d # First observation: 2002/02/06 # Last observation: 2002/03/15 Preliminary a, adot, b, bdot, g, gdot: 0.000000 0.249436 0.000001 -0.019486 0.096763 0.000000 # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # WARNING Fitting with energy constraint # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # Chi-squared of fit: 3.64 DOF: 3 RMS: 0.17 # Min/Max residuals: -0.26 0.36 # Exact a, adot, b, bdot, g, gdot: 3.154554E-05 1.657471E-01 -2.448901E-06 -1.971443E-02 8.361484E-02 2.270980E-02 # Covariance matrix: 5.7557E-11 2.9542E-07 -5.7974E-13 7.9854E-10 4.6423E-08 -7.7682E-07 2.9542E-07 1.5376E-03 -3.0865E-09 4.2439E-06 2.4137E-04 -4.0878E-03 -5.7974E-13 -3.0865E-09 5.0462E-13 -1.4316E-11 -4.8237E-10 8.5861E-09 7.9854E-10 4.2439E-06 -1.4316E-11 1.2862E-08 6.6347E-07 -1.1765E-05 4.6423E-08 2.4137E-04 -4.8237E-10 6.6347E-07 3.7897E-05 -6.4030E-04 -7.7682E-07 -4.0878E-03 8.5861E-09 -1.1765E-05 -6.4030E-04 1.1113E-02 # lat0 lon0 xBary yBary zBary JD0 -0.289353 135.857301 -0.027836 -0.005039 -0.982886 2452311.700603 # Heliocentric elements and errors Epoch: 2452310.5000 = 2002/02/05 Mean Anomaly: 13.73620 +/- 60.028 Argument of Peri: 151.83811 +/- 140.374 Long of Asc Node: 313.71127 +/- 0.531 Inclination: 6.78203 +/- 1.644 Eccentricity: 0.35856202 +/- 0.1387 Semi-Major Axis: 19.44839710 +/- 1.7958 Time of Perihelion: 2451115.1692 +/- 5221.1 Perihelion: 12.47494063 +/- 2.9325 Aphelion: 26.42185357 +/- 3.6366 Period (y) 85.7697 +/- 11.88 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -9.30594232 +/- 0.6318 Ecliptic Y 8.99899500 +/- 0.6133 Ecliptic Z -0.06042554 +/- 0.0044 Ecliptic XDOT -0.00431950 +/- 0.0019 Ecliptic YDOT -0.00337965 +/- 0.0031 Ecliptic ZDOT -0.00064905 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 12.94550596 +/- 0.6229 Geocenter to KBO 11.95959886 +/- 0.8805 # Hcoef: 11.91
The following table shows the complete astrometric record for 02CA249. 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 (02CA249) followed by the observatory code and reference code for the source of the astrometry.
2002 02 06.19986 09 12 54.69 +15 48 24.4 22.0R 02CA249 695 Cf2784 2002 02 06.28876 09 12 53.44 +15 48 29.1 02CA249 695 Cf2784 2002 02 07.22347 09 12 40.44 +15 49 17.0 02CA249 695 Cf2784 2002 03 15.17236 09 05 23.31 +16 14 50.6 23.3R 02CA249 662 Cf2784
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 -0.26
2 0.0002 -18.62 0.06 -0.86 -0.09
3 0.0028 -212.01 -0.04 -10.75 0.36
4 0.1012 -6689.26 -0.00 -385.75 -0.01
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.
02CA249 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