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: 19QF112 # Created Sun Oct 19 01:12:02 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 14 observations of 14 # Arc: 6.06y # First observation: 2019/08/29 # Last observation: 2025/09/20 # Chi-squared of fit: 1.46 DOF: 22 RMS: 0.06 # Min/Max residuals: -0.13 0.11 # Exact a, adot, b, bdot, g, gdot: 1.245675E-05 1.730372E-02 2.881813E-06 3.613797E-03 2.163533E-02 -8.676921E-04 # Covariance matrix: 5.0513E-13 -1.5834E-13 1.5531E-14 -2.3276E-14 4.6709E-13 -1.0302E-12 -1.5834E-13 3.4502E-13 -4.9763E-14 7.1390E-14 2.9979E-13 3.1435E-12 1.5531E-14 -4.9763E-14 2.0544E-13 -6.2653E-14 -4.9787E-14 -4.9424E-13 -2.3276E-14 7.1390E-14 -6.2653E-14 4.4522E-14 6.9341E-14 7.0892E-13 4.6709E-13 2.9979E-13 -4.9787E-14 6.9341E-14 1.4739E-12 3.0421E-12 -1.0302E-12 3.1435E-12 -4.9424E-13 7.0892E-13 3.0421E-12 3.1215E-11 # lat0 lon0 xBary yBary zBary JD0 -1.404400 -9.966886 0.249437 -0.023843 -0.972728 2458724.712719 # Heliocentric elements and errors Epoch: 2458724.5000 = 2019/08/29 Mean Anomaly: 196.81830 +/- 0.080 Argument of Peri: 161.91675 +/- 0.070 Long of Asc Node: 356.28569 +/- 0.000 Inclination: 11.86091 +/- 0.001 Eccentricity: 0.20487958 +/- 0.0001 Semi-Major Axis: 39.37086114 +/- 0.0062 Time of Perihelion: 2499625.1073 +/- 23.2 Perihelion: 31.30457566 +/- 0.0070 Aphelion: 47.43714663 +/- 0.0090 Period (y) 247.0419 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 46.42745712 +/- 0.0026 Ecliptic Y -8.41854290 +/- 0.0005 Ecliptic Z -1.13268675 +/- 0.0001 Ecliptic XDOT 0.00029038 +/- 0.0000 Ecliptic YDOT 0.00217429 +/- 0.0000 Ecliptic ZDOT 0.00045964 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 47.19816165 +/- 0.0025 Geocenter to KBO 46.22074828 +/- 0.0026 # Hcoef: 7.03
The following table shows the complete astrometric record for 19QF112. 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 (19QF112) followed by the observatory code and reference code for the source of the astrometry.
2019 08 29.211918 23 25 34.751 -05 14 20.87 23.6r 19QF112 W84 C~7XLk 2019 08 29.387113 23 25 34.039 -05 14 25.07 23.6r 19QF112 W84 C~7XLk 2019 09 27.014583 23 23 36.654 -05 25 50.67 23.6r 19QF112 W84 C~7XLk 2019 09 27.176040 23 23 35.990 -05 25 54.36 23.6r 19QF112 W84 C~7XLk 2020 10 19.03389 23 25 32.63 -04 58 51.3 23.8V 19QF112 W84 C~7XLk 2020 10 19.05975 23 25 32.54 -04 58 51.8 19QF112 W84 C~7XLk 2020 10 19.11156 23 25 32.37 -04 58 52.7 19QF112 W84 C~7XLk 2020 10 19.13748 23 25 32.28 -04 58 53.1 19QF112 W84 C~7XLk 2021 09 07.105479 23 31 38.220 -04 08 04.62 23.6r 19QF112 W84 C~7XLk 2021 09 07.194942 23 31 37.835 -04 08 06.87 23.6r 19QF112 W84 C~7XLk 2021 10 05.001523 23 29 44.506 -04 19 07.64 23.7r 19QF112 W84 C~7XLk 2021 10 05.173614 23 29 43.830 -04 19 11.49 23.7r 19QF112 W84 C~7XLk 2025 09 20.305830 23 44 09.547 -01 51 49.85 23.7G 19QF112 G37 C~98Rf 2025 09 20.344710 23 44 09.381 -01 51 50.94 19QF112 G37 C~98Rf
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 0.06 0.00 -0.03
2 0.0005 0.00 0.00 0.00 -0.08
3 0.0789 0.00 0.06 0.00 -0.05
4 0.0793 0.00 -0.00 0.00 -0.03
5 1.1412 0.00 -0.02 0.00 0.07
6 1.1413 0.00 -0.08 0.00 0.03
7 1.1414 0.00 -0.03 0.00 0.05
8 1.1415 0.00 -0.08 0.00 0.11
9 2.0257 0.00 0.05 0.00 0.01
10 2.0260 0.00 -0.13 0.00 -0.06
11 2.1021 0.00 0.04 0.00 0.01
12 2.1026 0.00 0.03 0.00 -0.04
13 6.0619 0.00 0.02 0.00 0.05
14 6.0620 0.00 -0.00 0.00 -0.08
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.
19QF112 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.415 39.415 39.415 ecceobj 0.204 0.204 0.204 incobj 11.841 11.841 11.841 qmin 30.593 30.594 30.583 qmax 48.878 48.951 48.710 amean 39.455 39.456 39.456 amin 39.019 39.028 39.022 amax 39.948 39.954 39.946 emean 0.197 0.197 0.197 emin 0.167 0.167 0.167 emax 0.224 0.225 0.223 imean 13.025 13.025 13.024 imin 12.243 12.243 12.240 imax 14.029 14.029 14.029 excite_mean 0.300 0.300 0.300 fracstop 1.000 1.000 1.000 cjmean 2.950 2.950 2.950 libcent 0 180.3 180.4 180.1 libamp 0 80.8 80.9 80.2 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 174.2 174.2 174.3 kozaiamp 180.0 180.0 180.0