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: 19QP111 # Created Tue Apr 1 01:11:15 2025 # Orbit generated from Bernstein formalism # Fitting 8 observations of 8 # Arc: 2.03y # First observation: 2019/08/30 # Last observation: 2021/09/09 Preliminary a, adot, b, bdot, g, gdot: 0.000011 0.022875 0.000000 -0.000444 0.023960 0.000000 # Chi-squared of fit: 3.83 DOF: 10 RMS: 0.12 # Min/Max residuals: -0.26 0.26 # Exact a, adot, b, bdot, g, gdot: 1.500286E-05 2.284899E-02 -3.104223E-07 -4.434748E-04 2.389840E-02 3.443106E-05 # Covariance matrix: 7.3993E-13 7.1805E-13 1.0595E-15 -2.0086E-14 1.6711E-12 2.2283E-11 7.1805E-13 4.9582E-12 9.3967E-15 -1.0289E-13 5.5622E-12 1.1550E-10 1.0595E-15 9.3967E-15 3.5746E-13 -2.1407E-13 8.8196E-15 2.3379E-13 -2.0086E-14 -1.0289E-13 -2.1407E-13 2.6564E-13 -1.2093E-13 -2.5322E-12 1.6711E-12 5.5622E-12 8.8196E-15 -1.2093E-13 8.2175E-12 1.3499E-10 2.2283E-11 1.1550E-10 2.3379E-13 -2.5322E-12 1.3499E-10 2.8433E-09 # lat0 lon0 xBary yBary zBary JD0 -2.973328 -7.998838 0.266274 -0.050226 -0.967103 2458725.713221 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 194.14405 +/- 18.391 Argument of Peri: 54.87886 +/- 18.384 Long of Asc Node: 102.81942 +/- 0.022 Inclination: 3.11599 +/- 0.000 Eccentricity: 0.00707494 +/- 0.0005 Semi-Major Axis: 42.52375640 +/- 0.0128 Time of Perihelion: 2505383.6891 +/- 5174.1 Perihelion: 42.22290358 +/- 0.0245 Aphelion: 42.82460922 +/- 0.0246 Period (y) 277.3037 +/- 0.13 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 42.30569688 +/- 0.0050 Ecliptic Y -6.22027249 +/- 0.0007 Ecliptic Z -2.17049707 +/- 0.0003 Ecliptic XDOT 0.00037400 +/- 0.0000 Ecliptic YDOT 0.00259256 +/- 0.0000 Ecliptic ZDOT -0.00005117 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.81559103 +/- 0.0049 Geocenter to KBO 41.84381114 +/- 0.0050 # Hcoef: 8.61
The following table shows the complete astrometric record for 19QP111. 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 (19QP111) followed by the observatory code and reference code for the source of the astrometry.
2019 08 30.212420 23 35 19.801 -05 54 15.68 24.8r 19QP111 W84 C~7XLj 2019 08 30.387214 23 35 19.057 -05 54 20.61 24.8r 19QP111 W84 C~7XLj 2019 09 28.012277 23 33 15.014 -06 07 47.25 24.9r 19QP111 W84 C~7XLj 2019 09 28.177548 23 33 14.290 -06 07 51.51 24.9r 19QP111 W84 C~7XLj 2020 10 20.004233 23 36 37.449 -05 47 05.73 24.9r 19QP111 W84 C~7XLj 2020 10 20.172968 23 36 36.817 -05 47 09.04 24.9r 19QP111 W84 C~7XLj 2021 09 09.073508 23 44 21.366 -04 59 20.18 24.7r 19QP111 W84 C~7XLj 2021 09 09.192572 23 44 20.817 -04 59 23.97 24.7r 19QP111 W84 C~7XLj
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 0.02 0.00 0.00
2 0.0005 -12.15 -0.03 -0.13 0.03
3 0.0788 -2030.76 0.00 -9.02 -0.10
4 0.0793 -2042.36 -0.00 -8.66 0.07
5 1.1411 1234.20 0.16 -64.40 -0.12
6 1.1416 1224.23 -0.16 -63.70 0.11
7 2.0284 8735.50 0.26 -193.21 0.09
8 2.0287 8726.45 -0.26 -193.41 -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.
19QP111 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 42.578 42.608 42.548 ecceobj 0.007 0.008 0.007 incobj 3.120 3.120 3.120 qmin 40.473 40.463 38.767 qmax 44.652 44.663 46.339 amean 42.470 42.499 42.440 amin 42.148 42.180 42.110 amax 42.800 42.820 42.785 emean 0.021 0.022 0.035 emin 0.000 0.000 0.000 emax 0.043 0.043 0.084 imean 1.685 1.695 1.660 imin 0.495 0.504 0.373 imax 2.889 2.868 2.914 excite_mean 0.037 0.037 0.048 fracstop 1.000 1.000 1.000 cjmean 3.082 3.082 3.080 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 170.0 174.1 176.5 kozaiamp 179.9 180.0 179.9