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: 21QF98 # Created Sun Dec 22 02:11:18 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 13 observations of 13 # Arc: 8.11y # First observation: 2014/07/26 # Last observation: 2022/09/03 # Chi-squared of fit: 3.41 DOF: 20 RMS: 0.09 # Min/Max residuals: -0.32 0.17 # Exact a, adot, b, bdot, g, gdot: 1.957625E-05 4.674660E-02 4.510981E-06 1.077619E-02 3.769627E-02 1.107195E-02 # Covariance matrix: 1.4665E-12 -3.8805E-13 8.7062E-15 -4.5512E-14 -1.5435E-13 -5.7362E-13 -3.8805E-13 1.5083E-12 -6.7007E-14 3.3623E-13 1.4708E-12 4.2856E-12 8.7062E-15 -6.7007E-14 1.4343E-12 -2.0526E-13 -6.7786E-14 -1.9393E-13 -4.5512E-14 3.3623E-13 -2.0526E-13 1.0404E-13 3.3131E-13 9.7322E-13 -1.5435E-13 1.4708E-12 -6.7786E-14 3.3131E-13 1.6654E-12 4.2542E-12 -5.7362E-13 4.2856E-12 -1.9393E-13 9.7322E-13 4.2542E-12 1.2404E-11 # lat0 lon0 xBary yBary zBary JD0 -12.784370 -68.290925 -0.202408 -0.220750 -0.973147 2456864.884607 # Heliocentric elements and errors Epoch: 2456864.5000 = 2014/07/26 Mean Anomaly: 38.07086 +/- 0.007 Argument of Peri: 249.78232 +/- 0.015 Long of Asc Node: 334.84232 +/- 0.000 Inclination: 17.85655 +/- 0.000 Eccentricity: 0.29533670 +/- 0.0000 Semi-Major Axis: 33.73287827 +/- 0.0028 Time of Perihelion: 2449296.7171 +/- 1.6 Perihelion: 23.77032117 +/- 0.0025 Aphelion: 43.69543538 +/- 0.0039 Period (y) 195.9243 +/- 0.02 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 10.12475230 +/- 0.0003 Ecliptic Y -24.88577920 +/- 0.0008 Ecliptic Z -5.86996796 +/- 0.0002 Ecliptic XDOT 0.00350348 +/- 0.0000 Ecliptic YDOT 0.00036228 +/- 0.0000 Ecliptic ZDOT 0.00058544 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 27.50022039 +/- 0.0008 Geocenter to KBO 26.52772727 +/- 0.0009 # Hcoef: 7.63
The following table shows the complete astrometric record for 21QF98. 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 (21QF98) followed by the observatory code and reference code for the source of the astrometry.
2014 07 26.383829 19 43 33.28 -34 17 34.9 22.4r 21QF98 T14 C~79NT 2021 08 29.02721 20 52 20.816 -26 05 00.54 22.4r 21QF98 807 C~6Eqj 2021 08 29.16846 20 52 19.934 -26 05 01.81 22.3r 21QF98 807 C~6Eqj 2021 10 01.99395 20 49 36.995 -26 04 45.41 22.5r 21QF98 304 C~6Eqj 2021 10 05.99508 20 49 26.375 -26 03 57.28 22.3r 21QF98 304 C~6Eqj 2021 10 10.99344 20 49 16.172 -26 02 43.10 22.5r 21QF98 304 C~6Eqj 2021 10 11.99599 20 49 14.538 -26 02 26.46 22.2r 21QF98 304 C~6Eqj 2022 04 08.36045 21 08 10.676 -24 16 04.00 22.5r 21QF98 304 C~6Eqj 2022 04 09.36750 21 08 15.695 -24 15 51.01 22.5r 21QF98 304 C~6Eqj 2022 04 29.42071 21 09 28.901 -24 13 41.94 22.6r 21QF98 304 C~6Eqj 2022 04 30.42039 21 09 31.147 -24 13 41.96 22.2r 21QF98 304 C~6Eqj 2022 09 02.21003 21 00 36.590 -24 51 38.70 22.1r 21QF98 304 C~6Eqj 2022 09 03.15951 21 00 30.805 -24 51 47.96 22.5r 21QF98 304 C~6Eqj
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 0.00
2 7.0928 0.00 -0.32 0.00 -0.09
3 7.0932 0.00 0.17 0.00 -0.01
4 7.1858 0.00 -0.02 0.00 -0.02
5 7.1967 0.00 -0.02 0.00 -0.05
6 7.2104 0.00 0.10 0.00 0.09
7 7.2132 0.00 0.04 0.00 0.04
8 7.7015 0.00 0.09 0.00 -0.01
9 7.7043 0.00 -0.04 0.00 -0.04
10 7.7592 0.00 -0.01 0.00 0.04
11 7.7619 0.00 -0.05 0.00 0.05
12 8.1036 0.00 0.05 0.00 -0.03
13 8.1062 0.00 -0.11 0.00 -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.
21QF98 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 33.627 33.627 33.627 ecceobj 0.292 0.292 0.292 incobj 17.838 17.838 17.838 qmin 23.810 23.810 23.810 qmax 44.707 44.927 44.683 amean 34.361 34.634 34.367 amin 33.627 33.627 33.627 amax 34.851 35.305 34.770 emean 0.289 0.277 0.283 emin 0.275 0.257 0.270 emax 0.296 0.296 0.296 imean 19.399 20.038 19.694 imin 18.942 18.942 18.942 imax 19.864 20.865 20.293 excite_mean 0.440 0.441 0.440 fracstop 0.002 0.005 0.004 cjmean 2.799 2.799 2.799 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 248.8 246.7 249.3 kozaiamp 1.7 3.6 1.9