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: 01SD291 # Created Wed Nov 27 02:08:13 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 8 observations of 10 # Arc: 85.61d # First observation: 2001/09/18 # Last observation: 2001/12/12 # Chi-squared of fit: 6.33 DOF: 10 RMS: 0.16 # Min/Max residuals: -0.32 0.31 # Exact a, adot, b, bdot, g, gdot: 1.620642E-05 2.492079E-02 -2.877656E-07 -1.237974E-03 2.459330E-02 4.354613E-04 # Covariance matrix: 3.4618E-13 1.3742E-11 6.0449E-14 -1.0511E-12 5.0035E-12 4.1646E-10 1.3742E-11 4.2175E-09 1.8974E-11 -3.2195E-10 1.4526E-09 1.2764E-07 6.0449E-14 1.8974E-11 2.8772E-13 -1.5550E-12 6.5308E-12 5.7430E-10 -1.0511E-12 -3.2195E-10 -1.5550E-12 2.4792E-11 -1.1088E-10 -9.7442E-09 5.0035E-12 1.4526E-09 6.5308E-12 -1.1088E-10 5.0087E-10 4.3957E-08 4.1646E-10 1.2764E-07 5.7430E-10 -9.7442E-09 4.3957E-08 3.8631E-06 # lat0 lon0 xBary yBary zBary JD0 -1.420491 8.260608 0.228424 -0.024334 -0.976195 2452170.793543 # Heliocentric elements and errors Epoch: 2452170.5000 = 2001/09/18 Mean Anomaly: 5.33860 +/- 2.455 Argument of Peri: 199.57509 +/- 7.851 Long of Asc Node: 162.01835 +/- 0.042 Inclination: 3.16874 +/- 0.005 Eccentricity: 0.08819573 +/- 0.0824 Semi-Major Axis: 45.64630407 +/- 1.1368 Time of Perihelion: 2450500.0556 +/- 770.8 Perihelion: 41.62049488 +/- 3.9009 Aphelion: 49.67211326 +/- 3.9589 Period (y) 308.4016 +/- 11.52 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 41.22877894 +/- 0.0371 Ecliptic Y 5.76073151 +/- 0.0054 Ecliptic Z -1.00797498 +/- 0.0009 Ecliptic XDOT -0.00036269 +/- 0.0002 Ecliptic YDOT 0.00275297 +/- 0.0000 Ecliptic ZDOT -0.00013877 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.64149090 +/- 0.0367 Geocenter to KBO 40.66150307 +/- 0.0375 # Hcoef: 8.04
The following table shows the complete astrometric record for 01SD291. 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 (01SD291) followed by the observatory code and reference code for the source of the astrometry.
2001 09 18.29280 00 32 35.43 +01 58 14.7 01SD291 675 Ce0701 2001 09 18.33611 00 32 35.26 +01 58 13.8 01SD291 675 Ce0701 2001 09 18.37713 00 32 35.07 +01 58 12.5 01SD291 675 Ce0701 2001 09 20.36917 00 32 26.41 +01 57 14.1 24. R 01SD291 675 Ce0701 2001 09 20.39690 00 32 26.28 +01 57 13.8 01SD291 675 Ce0701 2001 12 12.81403 00 27 51.90 +01 28 19.7 01SD291 950 Ce6616 2001 12 12.86119 00 27 51.87 +01 28 19.6 01SD291 950 Ce6616 2001 12 12.89822 00 27 51.83 +01 28 19.5 01SD291 950 Ce6616 2003 11 21.13157 00 38 41.429 +02 28 18.30 23.8R 01SD291 695 2003 11 21.18091 00 38 41.282 +02 28 17.49 01SD291 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 0.01 0.00 -0.11
2 0.0001 0.00 0.31 0.00 0.24
3 0.0002 0.00 0.16 0.00 0.13
4 0.0057 0.00 -0.02 0.00 -0.32
5 0.0058 0.00 -0.13 0.00 0.19
6 0.2341 0.00 0.06 0.00 0.00
7 0.2343 0.00 0.12 0.00 0.02
8 0.2344 0.00 -0.08 0.00 0.02
9 2.1734 0.00 (-353.15) 0.00 (-143.22)
10 2.1735 0.00 (-353.30) 0.00 (-143.23)
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.
01SD291 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.884 45.884 45.884 ecceobj 0.093 0.093 0.093 incobj 3.164 3.164 3.164 qmin 40.763 40.761 40.766 qmax 50.623 50.620 50.625 amean 45.542 45.542 45.542 amin 45.166 45.165 45.166 amax 45.952 45.950 45.952 emean 0.088 0.088 0.088 emin 0.074 0.074 0.074 emax 0.102 0.102 0.102 imean 3.112 3.112 3.112 imin 2.575 2.575 2.575 imax 3.599 3.599 3.599 excite_mean 0.104 0.104 0.104 fracstop 1.000 1.000 1.000 cjmean 3.107 3.107 3.107 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 184.3 184.4 184.3 kozaiamp 179.9 179.9 180.0