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: 02XF91 # Created Wed Apr 24 01:11:14 2024 # Orbit generated from Bernstein formalism # Fitting 5 observations of 5 # Arc: 56.98d # First observation: 2002/12/04 # Last observation: 2003/01/30 Preliminary a, adot, b, bdot, g, gdot: -0.000002 0.015897 -0.000000 0.001989 0.023935 0.000000 # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # WARNING Fitting with energy constraint # WARNING MRQMIN stopped after 17 iterations -- oscilliatory solution # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # Chi-squared of fit: 4.55 DOF: 5 RMS: 0.17 # Min/Max residuals: -0.33 0.37 # Exact a, adot, b, bdot, g, gdot: 8.969311E-06 1.638068E-02 9.929533E-07 1.989275E-03 2.403789E-02 -1.554637E-02 # Covariance matrix: 6.7791E-10 1.0136E-06 1.2914E-11 -4.6833E-09 1.7008E-07 6.1459E-07 1.0136E-06 1.5166E-03 1.9323E-08 -7.0083E-06 2.5448E-04 9.1738E-04 1.2914E-11 1.9323E-08 7.3799E-13 -9.2470E-11 3.2423E-09 1.1697E-08 -4.6833E-09 -7.0083E-06 -9.2470E-11 3.2445E-08 -1.1759E-06 -4.2153E-06 1.7008E-07 2.5448E-04 3.2423E-09 -1.1759E-06 4.2701E-05 1.5418E-04 6.1459E-07 9.1738E-04 1.1697E-08 -4.2153E-06 1.5418E-04 6.2969E-04 # lat0 lon0 xBary yBary zBary JD0 -1.776058 92.251871 0.342191 -0.028517 -0.919358 2452612.874723 # Heliocentric elements and errors Epoch: 2452610.5000 = 2002/12/02 Mean Anomaly: 306.55481 +/- 118.328 Argument of Peri: 121.82304 +/- 149.771 Long of Asc Node: 105.71093 +/- 33.222 Inclination: 7.18688 +/- 16.743 Eccentricity: 0.69122394 +/- 1.4020 Semi-Major Axis: 41.04826766 +/- 20.1308 Time of Perihelion: 2466871.3961 +/- 29779.9 Perihelion: 12.67472217 +/- 57.8834 Aphelion: 69.42181315 +/- 66.8652 Period (y) 262.9968 +/- 193.47 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -1.32956845 +/- 0.4432 Ecliptic Y 42.48630454 +/- 11.2950 Ecliptic Z -1.28930296 +/- 0.3505 Ecliptic XDOT -0.00180231 +/- 0.0040 Ecliptic YDOT -0.00183850 +/- 0.0032 Ecliptic ZDOT 0.00028155 +/- 0.0002 # Distances at JD0 (AU) Heliocenter to KBO 42.52665197 +/- 11.2843 Geocenter to KBO 41.60098543 +/- 11.3091 # Hcoef: 6.55
The following table shows the complete astrometric record for 02XF91. 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 (02XF91) followed by the observatory code and reference code for the source of the astrometry.
2002 12 04.37398 06 09 41.19 +21 38 39.5 22.3R 02XF91 695 Ch0143 2002 12 04.48249 06 09 40.57 +21 38 39.5 02XF91 695 Ch0143 2002 12 05.36722 06 09 36.00 +21 38 40.9 02XF91 695 Ch0143 2003 01 30.22729 06 04 44.31 +21 40 58.4 22.7R 02XF91 688 Ch1704 2003 01 30.35700 06 04 43.75 +21 40 59.0 02XF91 688 Ch1704
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 0.37 0.00 0.07
2 0.0003 -8.64 -0.33 -0.15 -0.08
3 0.0027 -72.37 -0.05 0.19 0.02
4 0.1557 -4140.65 0.04 85.79 -0.10
5 0.1560 -4148.46 -0.04 86.32 0.10
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.
02XF91 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