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: 19QC111 # Created Sun Oct 19 01:12:01 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 10 observations of 10 # Arc: 6.06y # First observation: 2019/08/29 # Last observation: 2025/09/20 # Chi-squared of fit: 0.20 DOF: 14 RMS: 0.02 # Min/Max residuals: -0.05 0.05 # Exact a, adot, b, bdot, g, gdot: 1.458571E-05 2.114451E-02 4.836562E-08 3.270146E-04 2.288055E-02 2.799550E-04 # Covariance matrix: 6.2362E-13 -1.0905E-13 4.9672E-16 -1.0115E-15 1.0433E-12 -5.7246E-13 -1.0905E-13 3.9663E-13 -3.3624E-15 5.8641E-15 5.8445E-13 2.9243E-12 4.9672E-16 -3.3624E-15 2.7496E-13 -6.2227E-14 -5.1437E-15 -2.6864E-14 -1.0115E-15 5.8641E-15 -6.2227E-14 3.0183E-14 8.4970E-15 4.6935E-14 1.0433E-12 5.8445E-13 -5.1437E-15 8.4970E-15 4.5798E-12 4.0153E-12 -5.7246E-13 2.9243E-12 -2.6864E-14 4.6935E-14 4.0153E-12 2.3445E-11 # lat0 lon0 xBary yBary zBary JD0 -1.590280 -10.156033 0.246224 -0.027021 -0.973463 2458724.712719 # Heliocentric elements and errors Epoch: 2458724.5000 = 2019/08/29 Mean Anomaly: 160.29064 +/- 0.373 Argument of Peri: 137.85649 +/- 0.364 Long of Asc Node: 50.12880 +/- 0.013 Inclination: 1.78509 +/- 0.000 Eccentricity: 0.03311117 +/- 0.0003 Semi-Major Axis: 43.32772624 +/- 0.0143 Time of Perihelion: 2412342.1293 +/- 110.5 Perihelion: 41.89309470 +/- 0.0178 Aphelion: 44.76235777 +/- 0.0186 Period (y) 285.2049 +/- 0.14 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 43.92189225 +/- 0.0040 Ecliptic Y -8.12460990 +/- 0.0007 Ecliptic Z -1.21290815 +/- 0.0001 Ecliptic XDOT 0.00048863 +/- 0.0000 Ecliptic YDOT 0.00248495 +/- 0.0000 Ecliptic ZDOT 0.00003796 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.68346936 +/- 0.0040 Geocenter to KBO 43.70527508 +/- 0.0041 # Hcoef: 7.39
The following table shows the complete astrometric record for 19QC111. 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 (19QC111) followed by the observatory code and reference code for the source of the astrometry.
2019 08 29.211918 23 25 10.473 -05 29 03.86 23.7r 19QC111 W84 C~7XLi 2019 08 29.387113 23 25 09.750 -05 29 08.54 23.7r 19QC111 W84 C~7XLi 2019 09 27.014583 23 23 09.879 -05 41 46.95 23.8r 19QC111 W84 C~7XLi 2019 09 27.176040 23 23 09.206 -05 41 51.03 23.8r 19QC111 W84 C~7XLi 2021 09 13.055538 23 33 00.659 -04 36 19.72 23.6r 19QC111 W84 C~7XLi 2021 09 13.174687 23 33 00.147 -04 36 22.95 23.6r 19QC111 W84 C~7XLi 2021 10 02.027293 23 31 41.566 -04 44 37.31 23.8r 19QC111 W84 C~7XLi 2021 10 02.165093 23 31 40.998 -04 44 40.80 23.8r 19QC111 W84 C~7XLi 2025 09 20.309160 23 50 14.106 -02 39 23.42 23.9G 19QC111 G37 C~98Rf 2025 09 20.348130 23 50 13.945 -02 39 24.48 19QC111 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 -0.01 0.00 0.04
2 0.0005 0.00 0.00 0.00 -0.04
3 0.0789 0.00 0.00 0.00 -0.01
4 0.0793 0.00 -0.00 0.00 0.00
5 2.0420 0.00 0.00 0.00 -0.00
6 2.0423 0.00 -0.01 0.00 -0.01
7 2.0940 0.00 0.02 0.00 0.03
8 2.0943 0.00 -0.05 0.00 -0.03
9 6.0619 0.00 -0.05 0.00 0.00
10 6.0620 0.00 0.05 0.00 -0.00
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.
19QC111 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.359 43.359 43.359 ecceobj 0.030 0.030 0.030 incobj 1.785 1.785 1.785 qmin 40.796 40.785 40.810 qmax 45.893 45.894 45.892 amean 43.260 43.260 43.259 amin 42.926 42.926 42.928 amax 43.612 43.613 43.610 emean 0.034 0.034 0.034 emin 0.016 0.016 0.016 emax 0.053 0.053 0.053 imean 1.189 1.189 1.189 imin 0.179 0.179 0.179 imax 1.875 1.875 1.875 excite_mean 0.041 0.041 0.041 fracstop 1.000 1.000 1.000 cjmean 3.091 3.091 3.091 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 160.2 160.2 160.1 kozaiamp 180.0 180.0 180.0