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: 19QG111 # Created Mon Apr 28 01:11:16 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: -0.000005 0.022956 -0.000001 -0.000340 0.023862 0.000000 # Chi-squared of fit: 10.29 DOF: 10 RMS: 0.20 # Min/Max residuals: -0.57 0.28 # Exact a, adot, b, bdot, g, gdot: 1.483347E-05 2.300534E-02 -1.483702E-06 -3.405476E-04 2.389069E-02 1.342328E-03 # Covariance matrix: 7.3975E-13 6.2785E-13 7.6608E-16 -1.1462E-14 1.6444E-12 1.4713E-11 6.2785E-13 4.7776E-12 8.5141E-15 -7.5940E-14 5.2273E-12 1.0728E-10 7.6608E-16 8.5141E-15 3.5393E-13 -2.0549E-13 7.4774E-15 2.1895E-13 -1.1462E-14 -7.5940E-14 -2.0549E-13 2.4977E-13 -8.0282E-14 -1.8529E-12 1.6444E-12 5.2273E-12 7.4774E-15 -8.0282E-14 8.0374E-12 1.0907E-10 1.4713E-11 1.0728E-10 2.1895E-13 -1.8529E-12 1.0907E-10 2.6496E-09 # lat0 lon0 xBary yBary zBary JD0 -2.198797 -7.172787 0.280207 -0.036997 -0.963757 2458725.713221 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 75.27913 +/- 0.231 Argument of Peri: 166.56175 +/- 0.445 Long of Asc Node: 104.31935 +/- 0.029 Inclination: 2.31573 +/- 0.000 Eccentricity: 0.05577916 +/- 0.0022 Semi-Major Axis: 43.31033370 +/- 0.0131 Time of Perihelion: 2436950.5318 +/- 66.1 Perihelion: 40.89451972 +/- 0.0966 Aphelion: 45.72614768 +/- 0.0968 Period (y) 285.0332 +/- 0.13 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 42.42392895 +/- 0.0049 Ecliptic Y -5.62796419 +/- 0.0006 Ecliptic Z -1.60599534 +/- 0.0002 Ecliptic XDOT 0.00048868 +/- 0.0000 Ecliptic YDOT 0.00259734 +/- 0.0000 Ecliptic ZDOT -0.00004513 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.82572766 +/- 0.0049 Geocenter to KBO 41.85731707 +/- 0.0050 # Hcoef: 9.65
The following table shows the complete astrometric record for 19QG111. 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 (19QG111) followed by the observatory code and reference code for the source of the astrometry.
2019 08 30.212420 23 37 08.517 -04 51 58.82 25.9r 19QG111 W84 C~7XLi 2019 08 30.387214 23 37 07.776 -04 52 03.91 25.9r 19QG111 W84 C~7XLi 2019 09 28.012277 23 35 04.187 -05 05 29.16 25.6r 19QG111 W84 C~7XLi 2019 09 28.177548 23 35 03.457 -05 05 32.79 25.6r 19QG111 W84 C~7XLi 2020 10 18.012125 23 38 34.447 -04 43 45.72 25.9r 19QG111 W84 C~7XLi 2020 10 18.176134 23 38 33.839 -04 43 49.28 25.9r 19QG111 W84 C~7XLi 2021 10 06.002765 23 44 14.852 -04 08 33.89 26.1r 19QG111 W84 C~7XLi 2021 10 06.167954 23 44 14.160 -04 08 38.68 26.1r 19QG111 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 0.08 0.00 0.26
2 0.0005 -12.19 -0.08 -0.29 0.08
3 0.0788 -2026.99 -0.09 -8.95 -0.57
4 0.0793 -2038.44 0.09 -7.97 0.26
5 1.1357 1374.70 0.00 -56.35 -0.04
6 1.1361 1364.94 -0.00 -56.01 -0.04
7 2.1021 6887.98 0.09 -141.96 0.28
8 2.1025 6876.57 -0.09 -142.23 -0.22
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.
19QG111 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.350 43.395 43.305 ecceobj 0.052 0.056 0.049 incobj 2.317 2.318 2.318 qmin 40.450 40.312 40.545 qmax 46.231 46.419 46.036 amean 43.238 43.284 43.194 amin 42.899 42.952 42.857 amax 43.585 43.632 43.532 emean 0.043 0.046 0.040 emin 0.024 0.027 0.020 emax 0.061 0.064 0.058 imean 1.166 1.159 1.175 imin 0.084 0.086 0.082 imax 1.840 1.833 1.855 excite_mean 0.049 0.052 0.046 fracstop 1.000 1.000 1.000 cjmean 3.090 3.090 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 171.6 172.2 172.0 kozaiamp 179.9 180.0 180.0