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: 19SJ187 # Created Sun Aug 31 01:11:49 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 9 observations of 9 # Arc: 5.84y # First observation: 2019/09/26 # Last observation: 2025/07/29 # Chi-squared of fit: 4.19 DOF: 12 RMS: 0.12 # Min/Max residuals: -0.28 0.10 # Exact a, adot, b, bdot, g, gdot: 1.189571E-05 1.191370E-02 3.424952E-06 3.117781E-03 1.640473E-02 -6.951363E-03 # Covariance matrix: 6.4975E-13 -6.1665E-13 -4.4133E-14 -6.5005E-14 8.6931E-13 -4.0507E-12 -6.1665E-13 1.0349E-12 3.1674E-14 1.4633E-13 -1.1259E-12 8.3908E-12 -4.4133E-14 3.1674E-14 3.3796E-13 -7.0293E-14 -2.5168E-13 -2.1796E-13 -6.5005E-14 1.4633E-13 -7.0293E-14 5.3186E-14 -3.8687E-14 1.4914E-12 8.6931E-13 -1.1259E-12 -2.5168E-13 -3.8687E-14 3.2853E-12 -4.8346E-12 -4.0507E-12 8.3908E-12 -2.1796E-13 1.4914E-12 -4.8346E-12 7.9703E-11 # lat0 lon0 xBary yBary zBary JD0 -15.452248 -24.237593 -0.455455 -0.237254 -0.858341 2458752.559271 # Heliocentric elements and errors Epoch: 2458752.5000 = 2019/09/26 Mean Anomaly: 316.28590 +/- 0.058 Argument of Peri: 55.40974 +/- 0.043 Long of Asc Node: 20.91669 +/- 0.002 Inclination: 21.15254 +/- 0.001 Eccentricity: 0.50246125 +/- 0.0006 Semi-Major Axis: 73.97309685 +/- 0.0590 Time of Perihelion: 2486970.6262 +/- 247.2 Perihelion: 36.80448238 +/- 0.0533 Aphelion: 111.14171132 +/- 0.0992 Period (y) 636.2370 +/- 0.76 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 54.57775469 +/- 0.0059 Ecliptic Y -24.07722929 +/- 0.0027 Ecliptic Z -16.24117986 +/- 0.0018 Ecliptic XDOT -0.00006848 +/- 0.0000 Ecliptic YDOT 0.00221608 +/- 0.0000 Ecliptic ZDOT 0.00081040 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 61.82450613 +/- 0.0053 Geocenter to KBO 60.95849200 +/- 0.0067 # Hcoef: 6.37
The following table shows the complete astrometric record for 19SJ187. 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 (19SJ187) followed by the observatory code and reference code for the source of the astrometry.
2019 09 26.05847 22 54 47.365 -23 41 36.36 24.2r 19SJ187 807 C~5JzT 2019 09 26.25496 22 54 46.724 -23 41 38.00 24.1r 19SJ187 807 C~5JzT 2019 11 29.05293 22 52 49.645 -23 36 33.11 24.2r 19SJ187 304 C~5JzT 2019 11 30.05204 22 52 49.739 -23 36 14.21 24.3r 19SJ187 304 C~5JzT 2021 09 02.20328 23 01 02.582 -22 42 39.38 24.3r 19SJ187 304 C~5JzT 2021 09 03.15306 23 00 59.256 -22 42 56.31 24.2r 19SJ187 304 C~5JzT 2025 07 29.36457 23 12 56.095 -20 36 40.42 23.8G 19SJ187 G37 2025 07 29.40913 23 12 55.979 -20 36 41.15 19SJ187 G37 2025 07 29.45352 23 12 55.874 -20 36 42.23 19SJ187 G37
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 -0.11
2 0.0005 0.00 0.06 0.00 0.10
3 0.1752 0.00 -0.05 0.00 0.07
4 0.1779 0.00 0.06 0.00 -0.04
5 1.9361 0.00 0.07 0.00 -0.07
6 1.9387 0.00 -0.07 0.00 0.08
7 5.8407 0.00 -0.28 0.00 -0.21
8 5.8408 0.00 -0.28 0.00 0.07
9 5.8409 0.00 -0.12 0.00 -0.01
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.
19SJ187 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 74.376 74.375 74.377 ecceobj 0.508 0.508 0.508 incobj 21.092 21.092 21.092 qmin 35.628 35.639 35.611 qmax 114.287 114.384 114.325 amean 73.905 73.904 73.905 amin 72.933 72.905 72.919 amax 75.324 75.385 75.311 emean 0.501 0.501 0.501 emin 0.485 0.485 0.486 emax 0.518 0.518 0.518 imean 21.432 21.434 21.432 imin 20.613 20.609 20.605 imax 22.397 22.397 22.383 excite_mean 0.620 0.620 0.620 fracstop 1.000 1.000 1.000 cjmean 2.931 2.931 2.931 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 175.8 175.7 175.9 kozaiamp 179.9 179.9 180.0