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: 99CW131 # Created Fri Nov 1 01:07:52 2024 # Orbit generated from Bernstein formalism # Fitting 8 observations of 8 # Arc: 1.16y # First observation: 1999/02/10 # Last observation: 2000/04/07 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.021836 0.000000 0.003043 0.023320 0.000000 # Chi-squared of fit: 5.12 DOF: 10 RMS: 0.14 # Min/Max residuals: -0.23 0.28 # Exact a, adot, b, bdot, g, gdot: 1.464838E-05 2.178511E-02 2.653292E-06 3.028639E-03 2.327686E-02 -1.885134E-03 # Covariance matrix: 7.5055E-13 6.4076E-12 -1.0816E-14 1.0944E-12 7.4120E-12 3.0960E-10 6.4076E-12 3.2869E-10 -1.9291E-12 1.8895E-10 1.8751E-10 5.3378E-08 -1.0816E-14 -1.9291E-12 3.8825E-13 -1.7728E-12 -6.7318E-13 -4.0848E-10 1.0944E-12 1.8895E-10 -1.7728E-12 1.4180E-10 6.6459E-11 3.9894E-08 7.4120E-12 1.8751E-10 -6.7318E-13 6.6459E-11 1.6031E-10 1.8781E-08 3.0960E-10 5.3378E-08 -4.0848E-10 3.9894E-08 1.8781E-08 1.1268E-05 # lat0 lon0 xBary yBary zBary JD0 -0.074250 174.819607 0.544421 -0.001304 -0.830774 2451219.968313 # Heliocentric elements and errors Epoch: 2451210.5000 = 1999/02/01 Mean Anomaly: 270.09289 +/- 17.522 Argument of Peri: 100.44624 +/- 14.192 Long of Asc Node: 174.62748 +/- 0.001 Inclination: 7.95037 +/- 0.010 Eccentricity: 0.09742583 +/- 0.1484 Semi-Major Axis: 43.38692841 +/- 1.0762 Time of Perihelion: 2477279.7376 +/- 4987.2 Perihelion: 39.15992082 +/- 6.5106 Aphelion: 47.61393600 +/- 6.5451 Period (y) 285.7897 +/- 10.63 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -43.55560083 +/- 0.0233 Ecliptic Y 4.49568526 +/- 0.0021 Ecliptic Z -0.05555424 +/- 0.0000 Ecliptic XDOT -0.00001268 +/- 0.0004 Ecliptic YDOT -0.00256289 +/- 0.0000 Ecliptic ZDOT 0.00035652 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.78703731 +/- 0.0231 Geocenter to KBO 42.96112554 +/- 0.0234 # Hcoef: 7.87
The following table shows the complete astrometric record for 99CW131. 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 (99CW131) followed by the observatory code and reference code for the source of the astrometry.
1999 02 10.46757 11 40 51.74 +01 59 24.4 24.2R 99CW131 568 Ca4191 1999 02 10.55479 11 40 51.43 +01 59 26.6 24.2R 99CW131 568 Ca4191 1999 02 18.62279 11 40 22.04 +02 02 51.4 24.2R 99CW131 568 Ca4191 1999 02 18.63440 11 40 21.97 +02 02 52.0 24.2R 99CW131 568 Ca4191 2000 04 06.47348 11 41 56.06 +02 05 35.4 23.7R 99CW131 568 Cb1943 2000 04 06.51192 11 41 55.91 +02 05 36.5 23.8R 99CW131 568 Cb1943 2000 04 07.50035 11 41 52.04 +02 06 03.4 23.6R 99CW131 568 Cb1943 2000 04 07.53257 11 41 51.90 +02 06 04.7 23.6R 99CW131 568 Cb1943
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 0.03 0.00 -0.12
2 0.0002 -5.14 -0.04 0.18 -0.05
3 0.0223 -490.80 0.23 13.58 0.03
4 0.0224 -492.01 -0.23 13.71 0.15
5 1.1527 738.09 -0.00 722.87 -0.16
6 1.1528 735.59 0.03 722.99 -0.09
7 1.1555 671.66 0.16 724.68 -0.04
8 1.1556 669.22 -0.18 725.04 0.28
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.
99CW131 quality flag:1 Type: CLASSICAL CENTAURR CLASSICAL axisobj 43.440 60.238 43.019 ecceobj 0.096 0.543 0.029 incobj 7.946 7.917 7.942 qmin 38.369 27.132 41.377 qmax 49.553 96.576 45.320 amean 43.758 60.905 43.266 amin 43.328 59.083 42.934 amax 44.180 62.220 43.609 emean 0.090 0.544 0.027 emin 0.063 0.528 0.011 emax 0.123 0.555 0.039 imean 8.357 8.326 8.034 imin 7.416 7.157 7.395 imax 9.309 10.991 8.724 excite_mean 0.172 0.563 0.142 fracstop 1.000 0.028 1.000 cjmean 3.063 2.860 3.069 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 180.7 116.1 178.7 kozaiamp 180.0 22.5 180.0