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 Tue Jan 21 02:11:23 2025 # Orbit generated from Bernstein formalism # Fitting 6 observations of 6 # Arc: 1.94y # First observation: 2019/09/26 # Last observation: 2021/09/03 Preliminary a, adot, b, bdot, g, gdot: -0.000008 0.012174 -0.000019 0.003170 0.016294 0.000000 # Chi-squared of fit: 0.92 DOF: 6 RMS: 0.07 # Min/Max residuals: -0.10 0.09 # Exact a, adot, b, bdot, g, gdot: 1.191091E-05 1.191436E-02 3.398854E-06 3.117937E-03 1.640496E-02 -6.927353E-03 # Covariance matrix: 7.2971E-13 -3.0757E-12 -9.5927E-15 -5.0097E-13 1.5571E-13 -8.9715E-11 -3.0757E-12 1.4605E-10 -6.1582E-12 3.2826E-11 4.7749E-11 5.1717E-09 -9.5927E-15 -6.1582E-12 7.3183E-13 -1.6829E-12 -2.5500E-12 -2.2411E-10 -5.0097E-13 3.2826E-11 -1.6829E-12 7.7833E-12 1.1332E-11 1.1710E-09 1.5571E-13 4.7749E-11 -2.5500E-12 1.1332E-11 2.0105E-11 1.7411E-09 -8.9715E-11 5.1717E-09 -2.2411E-10 1.1710E-09 1.7411E-09 1.8402E-07 # lat0 lon0 xBary yBary zBary JD0 -15.452248 -24.237593 -0.455455 -0.237254 -0.858341 2458752.559271 # Heliocentric elements and errors Epoch: 2458750.5000 = 2019/09/24 Mean Anomaly: 316.05678 +/- 2.992 Argument of Peri: 55.44718 +/- 0.668 Long of Asc Node: 20.91727 +/- 0.013 Inclination: 21.15234 +/- 0.004 Eccentricity: 0.50075931 +/- 0.0304 Semi-Major Axis: 73.80624197 +/- 2.9662 Time of Perihelion: 2487020.6083 +/- 894.3 Perihelion: 36.84707952 +/- 2.6885 Aphelion: 110.76540443 +/- 4.9851 Period (y) 634.0855 +/- 38.22 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 54.57700731 +/- 0.0147 Ecliptic Y -24.07689180 +/- 0.0066 Ecliptic Z -16.24095483 +/- 0.0044 Ecliptic XDOT -0.00006491 +/- 0.0001 Ecliptic YDOT 0.00221456 +/- 0.0000 Ecliptic ZDOT 0.00080935 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 61.82325663 +/- 0.0132 Geocenter to KBO 60.95719246 +/- 0.0167 # Hcoef: 6.39
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
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 -0.09 0.00 -0.08
2 0.0005 -8.73 0.09 1.98 0.08
3 0.1752 -1366.67 -0.02 916.80 0.07
4 0.1779 -1358.05 0.02 933.68 -0.07
5 1.9361 6159.12 0.03 1165.67 -0.10
6 1.9387 6110.14 -0.03 1168.88 0.09
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:1 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 74.207 84.928 67.156 ecceobj 0.506 0.593 0.420 incobj 21.092 21.102 21.082 qmin 35.376 33.433 38.054 qmax 114.548 138.073 97.040 amean 73.735 84.085 66.818 amin 72.630 82.676 65.998 amax 75.327 86.116 67.903 emean 0.506 0.587 0.415 emin 0.494 0.576 0.399 emax 0.521 0.604 0.430 imean 20.807 21.308 21.251 imin 20.198 20.259 20.716 imax 21.357 21.823 21.888 excite_mean 0.618 0.691 0.551 fracstop 1.000 1.000 1.000 cjmean 2.932 2.878 2.977 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 204.5 99.0 166.3 kozaiamp 151.4 47.9 180.0