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: 19QL111 # Created Sun Apr 27 01:11:16 2025 # Orbit generated from Bernstein formalism # Fitting 12 observations of 12 # Arc: 2.03y # First observation: 2019/08/30 # Last observation: 2021/09/09 Preliminary a, adot, b, bdot, g, gdot: -0.000003 0.021578 -0.000000 0.000131 0.023140 0.000000 # Chi-squared of fit: 5.76 DOF: 18 RMS: 0.12 # Min/Max residuals: -0.23 0.23 # Exact a, adot, b, bdot, g, gdot: 1.474132E-05 2.161427E-02 2.544105E-07 1.322140E-04 2.315909E-02 1.590009E-03 # Covariance matrix: 7.3740E-13 6.9889E-13 -2.8916E-15 4.2407E-15 1.6593E-12 2.3206E-11 6.9889E-13 4.0927E-12 -8.9424E-15 2.0554E-14 5.3098E-12 1.0128E-10 -2.8916E-15 -8.9424E-15 3.3556E-13 -2.3107E-13 -1.3898E-14 -2.3037E-13 4.2407E-15 2.0554E-14 -2.3107E-13 2.5135E-13 2.6855E-14 5.4732E-13 1.6593E-12 5.3098E-12 -1.3898E-14 2.6855E-14 8.1304E-12 1.3721E-10 2.3206E-11 1.0128E-10 -2.3037E-13 5.4732E-13 1.3721E-10 2.6797E-09 # lat0 lon0 xBary yBary zBary JD0 -2.386013 -7.703639 0.271259 -0.040252 -0.966183 2458725.713221 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 100.89942 +/- 0.521 Argument of Peri: 169.20810 +/- 0.506 Long of Asc Node: 73.78629 +/- 0.032 Inclination: 2.35728 +/- 0.000 Eccentricity: 0.07271457 +/- 0.0022 Semi-Major Axis: 43.33783231 +/- 0.0082 Time of Perihelion: 2429513.6050 +/- 150.6 Perihelion: 40.18654062 +/- 0.0972 Aphelion: 46.48912400 +/- 0.0973 Period (y) 285.3047 +/- 0.08 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 43.67755073 +/- 0.0053 Ecliptic Y -6.18857700 +/- 0.0007 Ecliptic Z -1.79763156 +/- 0.0002 Ecliptic XDOT 0.00053774 +/- 0.0000 Ecliptic YDOT 0.00250748 +/- 0.0000 Ecliptic ZDOT 0.00000757 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.15040659 +/- 0.0052 Geocenter to KBO 43.17958746 +/- 0.0053 # Hcoef: 8.58
The following table shows the complete astrometric record for 19QL111. 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 (19QL111) followed by the observatory code and reference code for the source of the astrometry.
2019 08 30.212420 23 35 29.024 -05 14 53.83 25.0r 19QL111 W84 C~7XLj 2019 08 30.387214 23 35 28.300 -05 14 58.47 25.0r 19QL111 W84 C~7XLj 2019 09 28.012277 23 33 27.498 -05 27 55.01 24.8r 19QL111 W84 C~7XLj 2019 09 28.177548 23 33 26.768 -05 27 59.31 24.8r 19QL111 W84 C~7XLj 2020 10 18.012125 23 36 39.899 -05 06 14.93 25.0r 19QL111 W84 C~7XLj 2020 10 18.176134 23 36 39.321 -05 06 18.46 25.0r 19QL111 W84 C~7XLj 2020 10 20.004233 23 36 32.975 -05 06 55.23 24.9r 19QL111 W84 C~7XLj 2020 10 20.172968 23 36 32.374 -05 06 58.95 24.9r 19QL111 W84 C~7XLj 2020 10 22.003924 23 36 26.201 -05 07 34.53 25.0r 19QL111 W84 C~7XLj 2020 10 22.173214 23 36 25.624 -05 07 37.83 25.0r 19QL111 W84 C~7XLj 2021 09 09.073508 23 43 52.010 -04 19 45.61 25.0r 19QL111 W84 C~7XLj 2021 09 09.192572 23 43 51.468 -04 19 48.87 25.0r 19QL111 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 0.00 0.00 -0.03
2 0.0005 -11.77 -0.01 0.02 0.05
3 0.0788 -1975.97 0.21 0.25 -0.12
4 0.0793 -1987.68 -0.20 0.61 0.04
5 1.1357 1177.73 -0.06 57.12 0.15
6 1.1361 1168.41 0.04 57.30 -0.05
7 1.1411 1066.78 0.18 61.11 0.17
8 1.1416 1057.06 -0.10 61.25 -0.10
9 1.1466 958.29 -0.00 65.13 0.00
10 1.1471 949.07 -0.05 65.51 -0.04
11 2.0284 8218.22 0.23 48.95 -0.15
12 2.0287 8209.47 -0.23 49.19 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.
19QL111 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.367 43.396 43.339 ecceobj 0.068 0.072 0.065 incobj 2.358 2.358 2.358 qmin 39.712 39.602 39.836 qmax 47.016 47.196 46.851 amean 43.260 43.289 43.232 amin 42.917 42.954 42.893 amax 43.613 43.646 43.585 emean 0.059 0.062 0.055 emin 0.039 0.042 0.036 emax 0.078 0.082 0.075 imean 0.895 0.895 0.895 imin 0.441 0.449 0.434 imax 1.366 1.365 1.366 excite_mean 0.061 0.064 0.058 fracstop 1.000 1.000 1.000 cjmean 3.088 3.088 3.088 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 193.7 195.3 192.2 kozaiamp 179.9 179.9 179.9