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: 19QU109 # Created Tue Apr 1 01:11:14 2025 # Orbit generated from Bernstein formalism # Fitting 10 observations of 10 # Arc: 2.09y # First observation: 2019/08/29 # Last observation: 2021/10/02 Preliminary a, adot, b, bdot, g, gdot: 0.000024 0.024035 0.000006 -0.004686 0.024411 0.000000 # Chi-squared of fit: 1.76 DOF: 14 RMS: 0.07 # Min/Max residuals: -0.12 0.11 # Exact a, adot, b, bdot, g, gdot: 1.549910E-05 2.396675E-02 -2.532565E-06 -4.672166E-03 2.428234E-02 -1.066516E-03 # Covariance matrix: 6.8144E-13 5.5916E-13 1.7998E-14 -1.4997E-13 1.4339E-12 1.5297E-11 5.5916E-13 4.5339E-12 1.1891E-13 -9.5398E-13 4.8716E-12 9.7363E-11 1.7998E-14 1.1891E-13 3.5380E-13 -2.1647E-13 1.2572E-13 2.6752E-12 -1.4997E-13 -9.5398E-13 -2.1647E-13 3.8744E-13 -1.0251E-12 -2.1423E-11 1.4339E-12 4.8716E-12 1.2572E-13 -1.0251E-12 7.2056E-12 1.0459E-10 1.5297E-11 9.7363E-11 2.6752E-12 -2.1423E-11 1.0459E-10 2.1864E-09 # lat0 lon0 xBary yBary zBary JD0 -1.873935 -10.146390 0.246388 -0.031839 -0.973276 2458724.712719 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 333.48506 +/- 0.826 Argument of Peri: 221.43060 +/- 1.034 Long of Asc Node: 160.20650 +/- 0.001 Inclination: 11.18311 +/- 0.001 Eccentricity: 0.09538912 +/- 0.0012 Semi-Major Axis: 45.99114353 +/- 0.0217 Time of Perihelion: 2467111.1943 +/- 261.2 Perihelion: 41.60408877 +/- 0.0578 Aphelion: 50.37819830 +/- 0.0593 Period (y) 311.9030 +/- 0.22 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 41.43448093 +/- 0.0045 Ecliptic Y -7.67198600 +/- 0.0008 Ecliptic Z -1.34678213 +/- 0.0002 Ecliptic XDOT 0.00034924 +/- 0.0000 Ecliptic YDOT 0.00268479 +/- 0.0000 Ecliptic ZDOT -0.00052280 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.16028227 +/- 0.0044 Geocenter to KBO 41.18219798 +/- 0.0046 # Hcoef: 8.47
The following table shows the complete astrometric record for 19QU109. 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 (19QU109) followed by the observatory code and reference code for the source of the astrometry.
2019 08 29.211918 23 25 39.523 -05 44 29.01 24.7r 19QU109 W84 C~7XLg 2019 08 29.387113 23 25 38.771 -05 44 34.13 24.7r 19QU109 W84 C~7XLg 2019 09 27.014583 23 23 35.158 -05 59 04.36 24.6r 19QU109 W84 C~7XLg 2019 09 27.176040 23 23 34.447 -05 59 09.05 24.6r 19QU109 W84 C~7XLg 2020 10 16.001792 23 27 47.499 -05 50 10.41 24.6r 19QU109 W84 C~7XLg 2020 10 16.175804 23 27 46.850 -05 50 14.56 24.6r 19QU109 W84 C~7XLg 2021 09 13.055538 23 35 35.924 -05 16 28.80 24.4r 19QU109 W84 C~7XLg 2021 09 13.174687 23 35 35.405 -05 16 32.37 24.4r 19QU109 W84 C~7XLh 2021 10 02.027293 23 34 14.013 -05 25 59.49 24.7r 19QU109 W84 C~7XLh 2021 10 02.165093 23 34 13.424 -05 26 03.46 24.7r 19QU109 W84 C~7XLh
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 -0.11
2 0.0005 -12.33 0.00 -0.29 0.10
3 0.0789 -2050.49 0.11 -75.38 -0.05
4 0.0793 -2062.09 -0.12 -75.53 0.06
5 1.1329 1620.95 0.09 -1066.23 -0.05
6 1.1334 1610.41 -0.11 -1066.22 0.03
7 2.0420 8848.92 -0.12 -1979.58 0.01
8 2.0423 8840.37 0.06 -1979.77 0.08
9 2.0940 7497.40 0.07 -2017.32 -0.03
10 2.0943 7487.74 0.00 -2017.47 -0.05
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.
19QU109 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 46.056 46.101 46.012 ecceobj 0.099 0.101 0.097 incobj 11.168 11.168 11.169 qmin 40.718 40.682 40.782 qmax 51.375 51.469 51.186 amean 45.913 45.956 45.870 amin 45.533 45.578 45.496 amax 46.317 46.351 46.267 emean 0.098 0.099 0.096 emin 0.086 0.089 0.085 emax 0.110 0.111 0.107 imean 10.583 10.583 10.583 imin 10.161 10.157 10.158 imax 10.985 10.981 10.985 excite_mean 0.208 0.209 0.207 fracstop 1.000 1.000 1.000 cjmean 3.072 3.072 3.071 libcent 0 -180.0 -180.0 258.0 libamp 0 -180.0 -180.0 22.7 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 188.7 188.4 189.0 kozaiamp 180.0 180.0 180.0