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: 19QD111 # Created Tue Apr 1 01:11:15 2025 # Orbit generated from Bernstein formalism # Fitting 8 observations of 8 # Arc: 2.10y # First observation: 2019/08/30 # Last observation: 2021/10/06 Preliminary a, adot, b, bdot, g, gdot: 0.000004 0.020319 0.000000 0.000602 0.022474 0.000000 # Chi-squared of fit: 2.35 DOF: 10 RMS: 0.10 # Min/Max residuals: -0.17 0.19 # Exact a, adot, b, bdot, g, gdot: 1.414498E-05 2.030478E-02 9.863459E-07 6.026836E-04 2.244452E-02 -4.069641E-04 # Covariance matrix: 7.3954E-13 6.0326E-13 -3.1097E-15 1.8688E-14 1.6402E-12 1.6287E-11 6.0326E-13 4.4558E-12 -1.8484E-14 1.3921E-13 5.0366E-12 1.1472E-10 -3.1097E-15 -1.8484E-14 3.5384E-13 -2.0577E-13 -2.0835E-14 -5.1488E-13 1.8688E-14 1.3921E-13 -2.0577E-13 2.5239E-13 1.4310E-13 3.9959E-12 1.6402E-12 5.0366E-12 -2.0835E-14 1.4310E-13 7.9913E-12 1.2052E-10 1.6287E-11 1.1472E-10 -5.1488E-13 3.9959E-12 1.2052E-10 3.2709E-09 # lat0 lon0 xBary yBary zBary JD0 -2.206062 -7.692711 0.271444 -0.037216 -0.966253 2458725.713221 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 204.17362 +/- 2.454 Argument of Peri: 106.39681 +/- 2.446 Long of Asc Node: 43.90624 +/- 0.023 Inclination: 2.74084 +/- 0.001 Eccentricity: 0.05838727 +/- 0.0010 Semi-Major Axis: 43.20140230 +/- 0.0160 Time of Perihelion: 2503614.0215 +/- 706.5 Perihelion: 40.67899035 +/- 0.0440 Aphelion: 45.72381425 +/- 0.0447 Period (y) 283.9586 +/- 0.16 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 45.04538282 +/- 0.0056 Ecliptic Y -6.36504080 +/- 0.0008 Ecliptic Z -1.71500985 +/- 0.0002 Ecliptic XDOT 0.00029366 +/- 0.0000 Ecliptic YDOT 0.00246139 +/- 0.0000 Ecliptic ZDOT 0.00007515 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.52517453 +/- 0.0055 Geocenter to KBO 44.55431469 +/- 0.0056 # Hcoef: 9.01
The following table shows the complete astrometric record for 19QD111. 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 (19QD111) followed by the observatory code and reference code for the source of the astrometry.
2019 08 30.212420 23 35 14.277 -05 04 43.35 25.5r 19QD111 W84 C~7XLi 2019 08 30.387214 23 35 13.561 -05 04 47.64 25.5r 19QD111 W84 C~7XLi 2019 09 28.012277 23 33 15.647 -05 17 17.11 25.5r 19QD111 W84 C~7XLi 2019 09 28.177548 23 33 14.956 -05 17 21.58 25.5r 19QD111 W84 C~7XLi 2020 10 18.012125 23 36 10.987 -04 55 38.94 25.5r 19QD111 W84 C~7XLi 2020 10 18.176134 23 36 10.426 -04 55 42.24 25.5r 19QD111 W84 C~7XLi 2021 10 06.002765 23 41 11.034 -04 21 26.74 25.5r 19QD111 W84 C~7XLi 2021 10 06.167954 23 41 10.380 -04 21 30.62 25.5r 19QD111 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 0.03 0.00 -0.12
2 0.0005 -11.52 -0.03 0.29 0.19
3 0.0788 -1925.85 0.11 8.37 0.09
4 0.0793 -1937.10 -0.11 8.34 -0.17
5 1.1357 993.71 -0.11 164.42 0.05
6 1.1361 984.71 0.11 164.71 -0.05
7 2.1021 5927.31 -0.06 267.59 -0.02
8 2.1025 5916.79 0.06 267.92 0.02
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.
19QD111 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.274 43.314 43.234 ecceobj 0.058 0.059 0.057 incobj 2.738 2.739 2.738 qmin 39.171 39.178 39.171 qmax 47.361 47.484 47.317 amean 43.159 43.198 43.128 amin 42.820 42.857 42.768 amax 43.529 43.556 43.491 emean 0.067 0.069 0.066 emin 0.047 0.049 0.045 emax 0.089 0.090 0.089 imean 1.849 1.846 1.839 imin 0.688 0.706 0.670 imax 2.813 2.791 2.804 excite_mean 0.076 0.077 0.074 fracstop 1.000 1.000 1.000 cjmean 3.085 3.085 3.085 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 162.0 160.6 162.3 kozaiamp 179.9 180.0 180.0