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: 19AP142 # Created Wed Mar 26 01:11:13 2025 # Orbit generated from Bernstein formalism # Fitting 21 observations of 21 # Arc: 3.92y # First observation: 2015/04/05 # Last observation: 2019/03/08 Preliminary a, adot, b, bdot, g, gdot: 0.002559 0.062959 -0.000238 -0.019216 0.047828 0.000000 # Chi-squared of fit: 8.94 DOF: 36 RMS: 0.12 # Min/Max residuals: -0.30 0.27 # Exact a, adot, b, bdot, g, gdot: 1.953370E-05 6.363491E-02 -6.074596E-06 -1.935231E-02 5.082208E-02 1.160823E-02 # Covariance matrix: 6.9043E-13 -5.0292E-13 -5.4533E-14 1.1075E-13 -2.5550E-13 -1.3718E-12 -5.0292E-13 7.3711E-13 8.8759E-14 -1.9123E-13 2.3979E-13 2.3486E-12 -5.4533E-14 8.8759E-14 4.1942E-13 -1.3908E-13 3.9938E-14 3.0355E-13 1.1075E-13 -1.9123E-13 -1.3908E-13 9.1352E-14 -7.3680E-14 -6.4737E-13 -2.5550E-13 2.3979E-13 3.9938E-14 -7.3680E-14 3.0629E-13 9.2623E-13 -1.3718E-12 2.3486E-12 3.0355E-13 -6.4737E-13 9.2623E-13 7.9622E-12 # lat0 lon0 xBary yBary zBary JD0 -6.511083 130.450061 -0.899166 -0.048742 -0.428495 2457117.581529 # Heliocentric elements and errors Epoch: 2457110.5000 = 2015/03/29 Mean Anomaly: 102.53139 +/- 0.012 Argument of Peri: 74.74232 +/- 0.008 Long of Asc Node: 292.83793 +/- 0.000 Inclination: 17.90630 +/- 0.000 Eccentricity: 0.23272218 +/- 0.0000 Semi-Major Axis: 18.34174646 +/- 0.0006 Time of Perihelion: 2448938.7742 +/- 0.9 Perihelion: 14.07321515 +/- 0.0007 Aphelion: 22.61027776 +/- 0.0009 Period (y) 78.5542 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -13.65097121 +/- 0.0001 Ecliptic Y 14.62155546 +/- 0.0002 Ecliptic Z -2.23135773 +/- 0.0000 Ecliptic XDOT -0.00293835 +/- 0.0000 Ecliptic YDOT -0.00184714 +/- 0.0000 Ecliptic ZDOT -0.00110664 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 20.12753975 +/- 0.0002 Geocenter to KBO 19.67648819 +/- 0.0002 # Hcoef: 9.84
The following table shows the complete astrometric record for 19AP142. 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 (19AP142) followed by the observatory code and reference code for the source of the astrometry.
2015 04 05.080751 08 44 25.277 +11 20 39.95 22.2i 19AP142 W84 C~8iiY 2015 04 12.009224 08 44 10.406 +11 22 35.47 23.1r 19AP142 W84 C~8iiY 2016 01 10.256672 09 08 51.125 +08 34 39.32 23.2g 19AP142 W84 C~8iiY 2016 01 10.257794 09 08 51.110 +08 34 39.25 22.7r 19AP142 W84 C~8iiY 2017 03 17.087909 09 11 26.930 +07 08 08.92 22.6z 19AP142 W84 C~8iiY 2018 02 18.239547 09 27 23.539 +04 48 34.42 22.9r 19AP142 W84 C~8eYm 2018 02 19.231934 09 27 14.290 +04 49 14.48 23.3g 19AP142 W84 C~8eYm 2018 11 15.56153 09 47 42.02 +02 51 37.2 23.2z 19AP142 T09 C~870S 2018 11 15.57003 09 47 42.05 +02 51 36.9 23.0z 19AP142 T09 C~870S 2018 11 15.61124 09 47 42.12 +02 51 34.8 23.0z 19AP142 T09 C~870S 2018 11 15.62300 09 47 42.14 +02 51 34.2 22.8z 19AP142 T09 C~870S 2019 01 06.56778 09 45 23.29 +02 31 00.7 23.6g 19AP142 T09 C~870S 2019 01 06.59117 09 45 23.12 +02 31 00.7 23.7g 19AP142 T09 C~870S 2019 01 06.60179 09 45 23.06 +02 31 00.7 23.7g 19AP142 T09 C~870S 2019 01 06.62123 09 45 22.91 +02 31 00.7 23.8g 19AP142 T09 C~870S 2019 01 06.62334 09 45 22.90 +02 31 00.7 23.7g 19AP142 T09 C~870S 2019 03 08.26245 09 36 35.50 +03 01 55.7 23.3r 19AP142 T09 C~870S 2019 03 08.29600 09 36 35.20 +03 01 57.2 23.3r 19AP142 T09 C~870S 2019 03 08.29809 09 36 35.20 +03 01 57.3 23.3r 19AP142 T09 C~870S 2019 03 08.31706 09 36 35.05 +03 01 58.0 23.0r 19AP142 T09 C~870S 2019 03 08.33820 09 36 34.86 +03 01 59.0 23.2r 19AP142 T09 C~870S
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 0.05 0.00 0.01
2 0.0190 -241.38 -0.04 53.91 0.03
3 0.7671 23653.97 0.00 -3698.70 0.06
4 0.7671 23653.78 -0.05 -3698.83 -0.05
5 1.9494 27401.17 0.06 -8071.84 -0.07
6 2.8752 43992.81 -0.02 -12166.18 -0.05
7 2.8779 43842.13 0.03 -12166.85 0.09
8 3.6153 64903.32 -0.19 -13756.00 -0.11
9 3.6153 64903.89 -0.02 -13756.17 0.08
10 3.6154 64905.69 -0.11 -13757.97 0.03
11 3.6154 64906.21 -0.13 -13758.48 0.01
12 3.7577 63142.62 0.06 -15626.34 0.05
13 3.7577 63139.96 0.02 -15627.10 -0.09
14 3.7578 63139.02 0.27 -15627.37 -0.08
15 3.7578 63136.68 0.09 -15628.04 -0.23
16 3.7578 63136.52 0.17 -15628.08 -0.22
17 3.9238 54362.53 -0.04 -16100.11 0.21
18 3.9239 54357.45 -0.30 -16099.93 0.09
19 3.9239 54357.42 -0.03 -16099.83 0.17
20 3.9240 54354.90 0.17 -16099.79 0.05
21 3.9240 54351.66 -0.02 -16099.62 0.03
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.
19AP142 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 18.414 18.418 18.410 ecceobj 0.240 0.240 0.240 incobj 17.914 17.915 17.914 qmin 13.699 12.323 13.115 qmax 22.836 24.989 23.898 amean 18.214 18.267 18.504 amin 17.929 17.966 18.101 amax 18.414 18.836 18.733 emean 0.240 0.289 0.260 emin 0.232 0.234 0.238 emax 0.245 0.331 0.283 imean 19.443 18.641 18.825 imin 19.264 17.664 18.388 imax 19.896 19.603 19.507 excite_mean 0.410 0.432 0.415 fracstop 0.002 0.025 0.011 cjmean 3.078 3.061 3.063 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 89.7 168.4 152.6 kozaiamp 17.9 178.9 83.2