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: 19QW110 # Created Tue Apr 1 01:11:15 2025 # Orbit generated from Bernstein formalism # Fitting 8 observations of 8 # Arc: 2.11y # First observation: 2019/08/29 # Last observation: 2021/10/07 Preliminary a, adot, b, bdot, g, gdot: 0.000016 0.022138 0.000000 -0.000552 0.023544 0.000000 # Chi-squared of fit: 3.52 DOF: 10 RMS: 0.12 # Min/Max residuals: -0.26 0.26 # Exact a, adot, b, bdot, g, gdot: 1.365758E-05 2.211686E-02 1.406862E-08 -5.512956E-04 2.346636E-02 -1.491776E-04 # Covariance matrix: 7.4128E-13 1.6490E-12 2.2438E-15 -5.2830E-14 1.8600E-12 4.5472E-11 1.6490E-12 1.5570E-11 1.8335E-14 -4.5378E-13 1.0563E-11 3.9188E-10 2.2438E-15 1.8335E-14 3.8127E-13 -1.8858E-13 1.2819E-14 4.6632E-13 -5.2830E-14 -4.5378E-13 -1.8858E-13 1.9213E-13 -3.0575E-13 -1.1566E-11 1.8600E-12 1.0563E-11 1.2819E-14 -3.0575E-13 9.8002E-12 2.6340E-10 4.5472E-11 3.9188E-10 4.6632E-13 -1.1566E-11 2.6340E-10 9.9898E-09 # lat0 lon0 xBary yBary zBary JD0 -1.849574 -8.617043 0.272290 -0.031201 -0.966371 2458724.712719 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 210.51635 +/- 11.023 Argument of Peri: 22.13489 +/- 11.016 Long of Asc Node: 119.50741 +/- 0.022 Inclination: 2.30990 +/- 0.001 Eccentricity: 0.01990842 +/- 0.0023 Semi-Major Axis: 42.84630040 +/- 0.0126 Time of Perihelion: 2501256.7901 +/- 3136.7 Perihelion: 41.99329808 +/- 0.0972 Aphelion: 43.69930272 +/- 0.0973 Period (y) 280.4647 +/- 0.12 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 43.02919340 +/- 0.0056 Ecliptic Y -6.80264137 +/- 0.0009 Ecliptic Z -1.37539523 +/- 0.0002 Ecliptic XDOT 0.00037583 +/- 0.0000 Ecliptic YDOT 0.00255477 +/- 0.0000 Ecliptic ZDOT -0.00006395 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.58530861 +/- 0.0055 Geocenter to KBO 42.61418466 +/- 0.0057 # Hcoef: 8.82
The following table shows the complete astrometric record for 19QW110. 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 (19QW110) followed by the observatory code and reference code for the source of the astrometry.
2019 08 29.211918 23 31 15.870 -05 06 59.15 25.1r 19QW110 W84 C~7XLi 2019 08 29.387113 23 31 15.104 -05 07 03.99 25.1r 19QW110 W84 C~7XLi 2019 09 27.014583 23 29 13.180 -05 20 17.15 25.1r 19QW110 W84 C~7XLi 2019 09 27.176040 23 29 12.492 -05 20 21.65 25.1r 19QW110 W84 C~7XLi 2021 09 05.096099 23 40 13.209 -04 13 25.68 25.1r 19QW110 W84 C~7XLi 2021 09 05.195929 23 40 12.775 -04 13 28.74 25.1r 19QW110 W84 C~7XLi 2021 10 07.004805 23 37 58.050 -04 27 59.61 25.1r 19QW110 W84 C~7XLi 2021 10 07.169933 23 37 57.378 -04 28 03.88 25.1r 19QW110 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 0.26 0.00 -0.08
2 0.0005 -12.43 -0.26 0.07 0.09
3 0.0789 -1998.93 0.02 -10.30 0.09
4 0.0793 -2010.15 -0.02 -10.39 -0.10
5 2.0202 8654.04 0.11 -234.00 0.12
6 2.0205 8646.86 -0.11 -234.23 -0.07
7 2.1076 6448.70 0.02 -232.43 0.04
8 2.1080 6437.77 -0.02 -232.36 -0.09
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.
19QW110 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 42.900 42.938 42.864 ecceobj 0.021 0.016 0.024 incobj 2.310 2.310 2.310 qmin 40.415 40.772 40.207 qmax 45.316 45.053 45.485 amean 42.792 42.830 42.755 amin 42.462 42.509 42.424 amax 43.127 43.159 43.093 emean 0.030 0.024 0.034 emin 0.010 0.004 0.013 emax 0.051 0.044 0.056 imean 1.703 1.688 1.715 imin 0.546 0.555 0.533 imax 2.601 2.538 2.656 excite_mean 0.043 0.039 0.046 fracstop 1.000 1.000 1.000 cjmean 3.085 3.086 3.084 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 185.7 188.7 185.7 kozaiamp 180.0 179.9 180.0