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: 19EG8 # Created Mon Apr 28 01:11:14 2025 # Orbit generated from Bernstein formalism # Fitting 20 observations of 20 # Arc: 3.01y # First observation: 2016/03/04 # Last observation: 2019/03/08 Preliminary a, adot, b, bdot, g, gdot: -0.000077 0.025152 0.000014 -0.002410 0.023563 0.000000 # Chi-squared of fit: 9.29 DOF: 34 RMS: 0.12 # Min/Max residuals: -0.27 0.29 # Exact a, adot, b, bdot, g, gdot: 1.602714E-05 2.500495E-02 -9.093358E-07 -2.423409E-03 2.469429E-02 -8.710523E-04 # Covariance matrix: 2.2915E-13 1.2908E-12 -1.7015E-15 -1.2207E-13 9.6943E-13 1.8180E-11 1.2908E-12 4.1514E-11 -4.9443E-14 -3.7269E-12 2.9371E-11 5.5564E-10 -1.7015E-15 -4.9443E-14 1.8472E-13 -5.9884E-14 -3.8552E-14 -6.7137E-13 -1.2207E-13 -3.7269E-12 -5.9884E-14 3.7270E-13 -2.6514E-12 -4.9959E-11 9.6943E-13 2.9371E-11 -3.8552E-14 -2.6514E-12 2.1200E-11 3.9449E-10 1.8180E-11 5.5564E-10 -6.7137E-13 -4.9959E-11 3.9449E-10 7.4463E-09 # lat0 lon0 xBary yBary zBary JD0 -10.382785 140.857819 -0.385467 -0.163907 -0.895513 2457451.847959 # Heliocentric elements and errors Epoch: 2457450.5000 = 2016/03/03 Mean Anomaly: 345.02132 +/- 1.741 Argument of Peri: 260.27993 +/- 2.135 Long of Asc Node: 259.75363 +/- 0.004 Inclination: 11.50373 +/- 0.000 Eccentricity: 0.09490492 +/- 0.0013 Semi-Major Axis: 45.53792676 +/- 0.0244 Time of Perihelion: 2462120.6346 +/- 542.8 Perihelion: 41.21615365 +/- 0.0620 Aphelion: 49.85969987 +/- 0.0638 Period (y) 307.3039 +/- 0.25 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -31.84664223 +/- 0.0058 Ecliptic Y 25.41726537 +/- 0.0047 Ecliptic Z -7.29823226 +/- 0.0014 Ecliptic XDOT -0.00163894 +/- 0.0000 Ecliptic YDOT -0.00224765 +/- 0.0000 Ecliptic ZDOT -0.00024687 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.39456721 +/- 0.0053 Geocenter to KBO 40.49518939 +/- 0.0076 # Hcoef: 8.28
The following table shows the complete astrometric record for 19EG8. 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 (19EG8) followed by the observatory code and reference code for the source of the astrometry.
2016 03 04.34717 09 19 47.01 +04 40 56.6 23.9i 19EG8 T09 C~8Do3 2016 03 04.36141 09 19 46.96 +04 40 57.1 24.2i 19EG8 T09 C~8Do3 2016 03 04.37528 09 19 46.89 +04 40 57.5 24.1i 19EG8 T09 C~8Do3 2016 03 04.39161 09 19 46.82 +04 40 57.8 24.0i 19EG8 T09 C~8Do3 2016 03 12.31203 09 19 15.07 +04 44 19.4 23.8z 19EG8 T09 C~8Do3 2016 03 12.32648 09 19 15.00 +04 44 19.8 24.1z 19EG8 T09 C~8Do3 2016 03 12.34030 09 19 14.97 +04 44 20.1 24.3z 19EG8 T09 C~8Do3 2016 03 12.38737 09 19 14.77 +04 44 21.4 24.3z 19EG8 T09 C~8Do3 2018 11 15.56728 09 41 18.35 +02 45 24.7 23.9z 19EG8 T09 C~870Y 2018 11 15.59104 09 41 18.35 +02 45 24.0 24.0z 19EG8 T09 C~870Y 2018 11 15.59379 09 41 18.35 +02 45 24.0 23.7z 19EG8 T09 C~870Y 2018 11 15.63220 09 41 18.40 +02 45 23.1 23.7z 19EG8 T09 C~870Y 2019 01 06.45953 09 39 57.67 +02 38 18.9 25.6g 19EG8 T09 C~870Y 2019 01 06.59969 09 39 57.17 +02 38 19.5 25.8g 19EG8 T09 C~870Y 2019 01 06.61913 09 39 57.08 +02 38 20.2 25.9g 19EG8 T09 C~870Y 2019 03 08.26245 09 35 26.99 +02 57 44.3 24.6r 19EG8 T09 C~870Y 2019 03 08.29600 09 35 26.83 +02 57 44.9 24.6r 19EG8 T09 C~870Y 2019 03 08.31497 09 35 26.75 +02 57 45.5 24.5r 19EG8 T09 C~870Y 2019 03 08.31706 09 35 26.74 +02 57 45.6 24.3r 19EG8 T09 C~870Y 2019 03 08.33820 09 35 26.66 +02 57 46.3 24.6r 19EG8 T09 C~870Y
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 -0.13
2 0.0000 -0.87 0.11 0.24 0.05
3 0.0001 -1.98 -0.05 0.30 0.05
4 0.0001 -3.07 -0.02 0.26 -0.06
5 0.0218 -516.80 0.04 45.09 0.02
6 0.0218 -517.92 -0.17 45.15 -0.02
7 0.0219 -518.44 0.18 45.29 0.04
8 0.0220 -521.69 -0.09 45.60 0.06
9 2.7001 20594.74 0.07 -542.31 0.15
10 2.7002 20594.97 -0.12 -542.97 -0.10
11 2.7002 20594.97 -0.17 -542.97 -0.05
12 2.7003 20595.97 0.18 -543.59 0.00
13 2.8422 19572.20 -0.07 -1330.84 -0.08
14 2.8426 19564.83 0.29 -1332.64 -0.27
15 2.8426 19563.32 -0.16 -1332.40 0.19
16 3.0087 15325.73 0.10 -1498.88 0.22
17 3.0088 15323.25 -0.04 -1499.06 -0.15
18 3.0088 15321.92 -0.04 -1498.87 -0.06
19 3.0088 15321.74 -0.07 -1498.82 -0.02
20 3.0089 15320.38 0.04 -1498.53 0.16
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.
19EG8 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.323 45.362 45.291 ecceobj 0.088 0.091 0.087 incobj 11.482 11.481 11.483 qmin 40.654 40.570 40.697 qmax 50.125 50.365 50.175 amean 45.306 45.348 45.271 amin 44.947 44.985 44.905 amax 45.699 45.735 45.669 emean 0.087 0.089 0.085 emin 0.074 0.077 0.074 emax 0.098 0.102 0.099 imean 13.092 13.094 13.089 imin 12.697 12.695 12.691 imax 13.468 13.468 13.466 excite_mean 0.243 0.243 0.242 fracstop 1.000 1.000 1.000 cjmean 3.045 3.045 3.045 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 186.9 186.8 187.4 kozaiamp 180.0 180.0 180.0