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: 19QS111 # Created Mon Apr 28 01:11:17 2025 # Orbit generated from Bernstein formalism # Fitting 8 observations of 8 # Arc: 2.10y # First observation: 2019/08/28 # Last observation: 2021/10/04 Preliminary a, adot, b, bdot, g, gdot: 0.000009 0.025352 0.000000 0.000172 0.025208 0.000000 # Chi-squared of fit: 0.74 DOF: 10 RMS: 0.05 # Min/Max residuals: -0.11 0.09 # Exact a, adot, b, bdot, g, gdot: 1.584189E-05 2.536468E-02 1.011192E-07 1.720913E-04 2.516728E-02 1.018515E-03 # Covariance matrix: 7.4075E-13 1.6600E-12 -5.0903E-16 1.4375E-14 1.7229E-12 3.9926E-11 1.6600E-12 1.9792E-11 -5.9537E-15 1.5611E-13 1.0787E-11 4.3526E-10 -5.0903E-16 -5.9537E-15 3.8279E-13 -1.8922E-13 -3.0736E-15 -1.3245E-13 1.4375E-14 1.5611E-13 -1.8922E-13 1.8097E-13 8.4543E-14 3.4667E-12 1.7229E-12 1.0787E-11 -3.0736E-15 8.4543E-14 8.6463E-12 2.3513E-10 3.9926E-11 4.3526E-10 -1.3245E-13 3.4667E-12 2.3513E-10 9.6664E-09 # lat0 lon0 xBary yBary zBary JD0 -0.367460 -7.130992 0.313555 -0.006117 -0.954413 2458723.711696 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 32.97348 +/- 2.519 Argument of Peri: 279.69340 +/- 2.953 Long of Asc Node: 35.65129 +/- 0.070 Inclination: 0.52380 +/- 0.001 Eccentricity: 0.06136991 +/- 0.0026 Semi-Major Axis: 42.84740609 +/- 0.0192 Time of Perihelion: 2449337.3737 +/- 716.8 Perihelion: 40.21786455 +/- 0.1111 Aphelion: 45.47694763 +/- 0.1115 Period (y) 280.4755 +/- 0.19 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 40.33690830 +/- 0.0046 Ecliptic Y -5.36900978 +/- 0.0006 Ecliptic Z -0.25482226 +/- 0.0000 Ecliptic XDOT 0.00046106 +/- 0.0000 Ecliptic YDOT 0.00272478 +/- 0.0000 Ecliptic ZDOT 0.00001778 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 40.69345613 +/- 0.0046 Geocenter to KBO 39.73412545 +/- 0.0046 # Hcoef: 8.41
The following table shows the complete astrometric record for 19QS111. 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 (19QS111) followed by the observatory code and reference code for the source of the astrometry.
2019 08 28.210895 23 34 23.410 -03 10 04.51 24.4r 19QS111 W84 C~7XLj 2019 08 28.388381 23 34 22.637 -03 10 09.54 24.4r 19QS111 W84 C~7XLj 2019 09 29.013696 23 32 00.375 -03 25 22.79 24.4r 19QS111 W84 C~7XLj 2019 09 29.177510 23 31 59.632 -03 25 27.51 24.4r 19QS111 W84 C~7XLj 2021 09 06.108763 23 44 22.093 -02 04 16.39 24.4r 19QS111 W84 C~7XLj 2021 09 06.196686 23 44 21.687 -02 04 19.05 24.4r 19QS111 W84 C~7XLj 2021 10 04.002582 23 42 16.401 -02 17 46.76 24.4r 19QS111 W84 C~7XLj 2021 10 04.175328 23 42 15.634 -02 17 51.65 24.4r 19QS111 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 -12.62 -0.02 -0.04 -0.11
3 0.0871 -2330.61 0.05 2.56 0.08
4 0.0875 -2342.70 -0.05 2.61 0.03
5 2.0257 9808.23 0.09 70.00 0.03
6 2.0260 9801.57 -0.09 69.97 -0.03
7 2.1021 7753.60 0.02 74.11 0.02
8 2.1026 7741.09 -0.02 74.18 -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.
19QS111 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 42.891 42.985 42.804 ecceobj 0.061 0.068 0.055 incobj 0.527 0.527 0.527 qmin 39.361 39.182 39.448 qmax 46.422 46.844 46.157 amean 42.781 42.876 42.692 amin 42.450 42.530 42.354 amax 43.143 43.237 43.043 emean 0.058 0.065 0.051 emin 0.032 0.039 0.026 emax 0.077 0.084 0.073 imean 2.166 2.190 2.128 imin 0.729 0.785 0.651 imax 2.940 2.973 2.915 excite_mean 0.070 0.075 0.063 fracstop 1.000 1.000 1.000 cjmean 3.081 3.081 3.081 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 187.3 184.2 191.0 kozaiamp 180.0 179.9 180.0