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: 19QY109 # Created Mon Apr 28 01:11:16 2025 # Orbit generated from Bernstein formalism # Fitting 8 observations of 8 # Arc: 2.03y # First observation: 2019/08/29 # Last observation: 2021/09/07 Preliminary a, adot, b, bdot, g, gdot: -0.000004 0.017227 -0.000001 0.002090 0.020384 0.000000 # Chi-squared of fit: 10.69 DOF: 10 RMS: 0.20 # Min/Max residuals: -0.44 0.44 # Exact a, adot, b, bdot, g, gdot: 1.124779E-05 1.724971E-02 1.889401E-06 2.094807E-03 2.040063E-02 1.192955E-03 # Covariance matrix: 7.3663E-13 6.3047E-13 -1.3301E-14 1.1118E-13 1.6435E-12 2.7366E-11 6.3047E-13 4.1880E-12 -6.2051E-14 5.3041E-13 5.0021E-12 1.3049E-10 -1.3301E-14 -6.2051E-14 3.5868E-13 -2.2277E-13 -7.8938E-14 -2.0641E-12 1.1118E-13 5.3041E-13 -2.2277E-13 3.3665E-13 6.6753E-13 1.7653E-11 1.6435E-12 5.0021E-12 -7.8938E-14 6.6753E-13 8.0058E-12 1.6426E-10 2.7366E-11 1.3049E-10 -2.0641E-12 1.7653E-11 1.6426E-10 4.3430E-09 # lat0 lon0 xBary yBary zBary JD0 -1.028239 -10.093251 0.247291 -0.017466 -0.973411 2458724.712719 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 134.41175 +/- 1.543 Argument of Peri: 209.73116 +/- 1.534 Long of Asc Node: 357.87880 +/- 0.002 Inclination: 6.97996 +/- 0.002 Eccentricity: 0.10026289 +/- 0.0022 Semi-Major Axis: 46.51665673 +/- 0.0153 Time of Perihelion: 2415454.5831 +/- 496.1 Perihelion: 41.85276249 +/- 0.1040 Aphelion: 51.18055097 +/- 0.1044 Period (y) 317.2641 +/- 0.16 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 49.16972442 +/- 0.0067 Ecliptic Y -9.01021724 +/- 0.0012 Ecliptic Z -0.87954645 +/- 0.0001 Ecliptic XDOT 0.00057673 +/- 0.0000 Ecliptic YDOT 0.00225079 +/- 0.0000 Ecliptic ZDOT 0.00027799 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 49.99619402 +/- 0.0066 Geocenter to KBO 49.01810225 +/- 0.0068 # Hcoef: 8.66
The following table shows the complete astrometric record for 19QY109. 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 (19QY109) followed by the observatory code and reference code for the source of the astrometry.
2019 08 29.211918 23 24 31.120 -04 56 34.65 25.7r 19QY109 W84 C~7XLh 2019 08 29.387113 23 24 30.406 -04 56 38.97 25.7r 19QY109 W84 C~7XLh 2019 09 27.014583 23 22 41.291 -05 07 37.85 25.5r 19QY109 W84 C~7XLh 2019 09 27.176040 23 22 40.671 -05 07 41.99 25.5r 19QY109 W84 C~7XLh 2020 10 19.015429 23 24 50.940 -04 45 20.34 25.5r 19QY109 W84 C~7XLh 2020 10 19.170607 23 24 50.457 -04 45 23.00 25.5r 19QY109 W84 C~7XLh 2021 09 07.105479 23 30 50.675 -04 00 12.80 25.5r 19QY109 W84 C~7XLh 2021 09 07.194942 23 30 50.303 -04 00 14.65 25.5r 19QY109 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 0.44 0.00 -0.05
2 0.0005 -11.51 -0.44 0.22 -0.05
3 0.0789 -1769.72 0.16 34.65 0.29
4 0.0793 -1779.87 -0.16 34.48 -0.18
5 1.1411 537.48 0.03 503.55 -0.03
6 1.1416 529.80 -0.03 503.95 0.02
7 2.0257 6551.59 0.13 871.51 -0.19
8 2.0260 6545.74 -0.13 872.01 0.18
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.
19QY109 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 46.540 46.587 46.496 ecceobj 0.096 0.100 0.094 incobj 6.972 6.972 6.972 qmin 41.084 40.924 41.091 qmax 52.079 52.294 51.966 amean 46.436 46.485 46.391 amin 46.048 46.093 46.012 amax 46.854 46.897 46.800 emean 0.100 0.103 0.098 emin 0.088 0.091 0.086 emax 0.112 0.116 0.110 imean 7.452 7.457 7.448 imin 7.097 7.102 7.091 imax 7.809 7.817 7.805 excite_mean 0.164 0.166 0.163 fracstop 1.000 1.000 1.000 cjmean 3.099 3.098 3.098 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 182.2 182.1 182.1 kozaiamp 180.0 180.0 180.0