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: 19QD110 # Created Sun Apr 27 01:11:15 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: -0.000004 0.021399 0.000000 -0.000993 0.023061 0.000000 # Chi-squared of fit: 6.51 DOF: 10 RMS: 0.16 # Min/Max residuals: -0.26 0.25 # Exact a, adot, b, bdot, g, gdot: 1.349365E-05 2.142929E-02 -7.806244E-07 -9.954874E-04 2.307624E-02 1.115715E-03 # Covariance matrix: 7.3911E-13 5.2650E-13 3.4755E-15 -2.9112E-14 1.4870E-12 1.4260E-11 5.2650E-13 4.0449E-12 2.5519E-14 -2.0277E-13 4.3026E-12 1.0016E-10 3.4755E-15 2.5519E-14 3.5596E-13 -2.0817E-13 2.4979E-14 7.0399E-13 -2.9112E-14 -2.0277E-13 -2.0817E-13 2.6024E-13 -2.0254E-13 -5.5622E-12 1.4870E-12 4.3026E-12 2.4979E-14 -2.0254E-13 6.6570E-12 9.9723E-11 1.4260E-11 1.0016E-10 7.0399E-13 -5.5622E-12 9.9723E-11 2.7502E-09 # lat0 lon0 xBary yBary zBary JD0 -0.773412 -7.560894 0.306385 -0.012911 -0.956671 2458723.711696 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 115.68119 +/- 1.279 Argument of Peri: 74.68464 +/- 1.266 Long of Asc Node: 156.19957 +/- 0.008 Inclination: 2.77106 +/- 0.001 Eccentricity: 0.05467893 +/- 0.0020 Semi-Major Axis: 43.17165712 +/- 0.0121 Time of Perihelion: 2425427.2083 +/- 367.9 Perihelion: 40.81107726 +/- 0.0889 Aphelion: 45.53223699 +/- 0.0891 Period (y) 283.6653 +/- 0.12 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 43.86487169 +/- 0.0048 Ecliptic Y -6.13807409 +/- 0.0007 Ecliptic Z -0.58496960 +/- 0.0001 Ecliptic XDOT 0.00047262 +/- 0.0000 Ecliptic YDOT 0.00250370 +/- 0.0000 Ecliptic ZDOT -0.00012011 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.29610718 +/- 0.0048 Geocenter to KBO 43.33461671 +/- 0.0048 # Hcoef: 9.58
The following table shows the complete astrometric record for 19QD110. 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 (19QD110) followed by the observatory code and reference code for the source of the astrometry.
2019 08 28.210895 23 33 27.043 -03 42 38.59 25.8r 19QD110 W84 C~7XLh 2019 08 28.388381 23 33 26.291 -03 42 43.42 25.8r 19QD110 W84 C~7XLh 2019 09 29.013696 23 31 14.300 -03 57 13.06 25.9r 19QD110 W84 C~7XLh 2019 09 29.177510 23 31 13.639 -03 57 17.19 25.9r 19QD110 W84 C~7XLh 2020 10 18.012125 23 34 35.410 -03 39 24.18 26.0r 19QD110 W84 C~7XLh 2020 10 18.176134 23 34 34.800 -03 39 28.11 26.0r 19QD110 W84 C~7XLh 2021 10 04.002582 23 40 05.587 -03 07 34.08 26.1r 19QD110 W84 C~7XLh 2021 10 04.175328 23 40 04.866 -03 07 38.56 26.1r 19QD110 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 0.25 0.00 0.02
2 0.0005 -12.25 -0.25 0.01 0.11
3 0.0871 -2170.63 -0.20 -18.96 -0.07
4 0.0875 -2181.35 0.21 -18.85 0.02
5 1.1411 1016.89 0.25 -225.96 -0.05
6 1.1416 1006.95 -0.26 -225.96 -0.13
7 2.1021 6315.04 0.08 -430.55 -0.02
8 2.1026 6303.34 -0.08 -430.37 0.12
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.
19QD110 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.211 43.252 43.172 ecceobj 0.050 0.053 0.048 incobj 2.763 2.763 2.763 qmin 40.305 40.221 40.349 qmax 46.134 46.262 45.973 amean 43.104 43.144 43.062 amin 42.770 42.809 42.727 amax 43.446 43.497 43.411 emean 0.042 0.045 0.040 emin 0.024 0.027 0.023 emax 0.062 0.064 0.060 imean 3.037 3.032 3.046 imin 2.036 2.048 2.025 imax 3.814 3.800 3.836 excite_mean 0.069 0.070 0.068 fracstop 1.000 1.000 1.000 cjmean 3.085 3.085 3.085 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 181.5 182.1 181.4 kozaiamp 180.0 180.0 180.0