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 Mon Apr 28 01:11:16 2025 # Orbit generated from Bernstein formalism # Fitting 8 observations of 8 # Arc: 2.09y # First observation: 2019/08/29 # Last observation: 2021/10/02 Preliminary a, adot, b, bdot, g, gdot: 0.000011 0.021149 -0.000000 0.000327 0.022925 0.000000 # Chi-squared of fit: 0.11 DOF: 10 RMS: 0.02 # Min/Max residuals: -0.04 0.04 # Exact a, adot, b, bdot, g, gdot: 1.456543E-05 2.114438E-02 4.534358E-08 3.270157E-04 2.288049E-02 2.765658E-04 # Covariance matrix: 7.4131E-13 1.5953E-12 -1.2826E-15 3.1890E-14 1.8513E-12 4.6264E-11 1.5953E-12 2.5079E-11 -1.8222E-14 4.6948E-13 1.2285E-11 6.8121E-10 -1.2826E-15 -1.8222E-14 3.8147E-13 -1.8816E-13 -8.8968E-15 -4.9873E-13 3.1890E-14 4.6948E-13 -1.8816E-13 1.8714E-13 2.2439E-13 1.2862E-11 1.8513E-12 1.2285E-11 -8.8968E-15 2.2439E-13 1.0127E-11 3.2555E-10 4.6264E-11 6.8121E-10 -4.9873E-13 1.2862E-11 3.2555E-10 1.8663E-08 # lat0 lon0 xBary yBary zBary JD0 -1.590280 -10.156033 0.246224 -0.027021 -0.973463 2458724.712719 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 160.55325 +/- 10.412 Argument of Peri: 137.59864 +/- 10.404 Long of Asc Node: 50.12839 +/- 0.032 Inclination: 1.78510 +/- 0.001 Eccentricity: 0.03306825 +/- 0.0018 Semi-Major Axis: 43.32743072 +/- 0.0180 Time of Perihelion: 2412262.6139 +/- 3012.6 Perihelion: 41.89466862 +/- 0.0780 Aphelion: 44.76019282 +/- 0.0783 Period (y) 285.2020 +/- 0.18 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 43.92199911 +/- 0.0060 Ecliptic Y -8.12462994 +/- 0.0011 Ecliptic Z -1.21291130 +/- 0.0002 Ecliptic XDOT 0.00048823 +/- 0.0000 Ecliptic YDOT 0.00248502 +/- 0.0000 Ecliptic ZDOT 0.00003797 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.68358503 +/- 0.0059 Geocenter to KBO 43.70535931 +/- 0.0061 # Hcoef: 7.35
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
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 -11.77 -0.01 -0.06 -0.03
3 0.0789 -1955.40 -0.00 5.73 -0.01
4 0.0793 -1966.24 0.00 5.92 0.00
5 2.0420 7707.48 0.01 133.82 -0.00
6 2.0423 7699.16 -0.01 133.88 -0.00
7 2.0940 6423.14 0.04 145.00 0.02
8 2.0943 6413.96 -0.04 145.15 -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.
19QC111 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.360 43.443 43.292 ecceobj 0.030 0.034 0.032 incobj 1.785 1.785 1.786 qmin 40.815 40.915 40.473 qmax 45.922 45.897 46.064 amean 43.261 43.345 43.191 amin 42.932 43.006 42.860 amax 43.609 43.686 43.530 emean 0.034 0.034 0.040 emin 0.016 0.015 0.021 emax 0.054 0.052 0.059 imean 1.189 1.204 1.181 imin 0.180 0.241 0.108 imax 1.873 1.870 1.885 excite_mean 0.041 0.041 0.046 fracstop 1.000 1.000 1.000 cjmean 3.091 3.092 3.089 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 160.3 164.7 155.0 kozaiamp 180.0 179.9 180.0