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: 19SL235 # Created Mon Apr 28 01:11:17 2025 # Orbit generated from Bernstein formalism # Fitting 8 observations of 8 # Arc: 1.14y # First observation: 2019/08/28 # Last observation: 2020/10/18 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.021448 0.000000 0.000072 0.022969 0.000000 # Chi-squared of fit: 1.09 DOF: 10 RMS: 0.07 # Min/Max residuals: -0.09 0.17 # Exact a, adot, b, bdot, g, gdot: 1.474140E-05 2.145040E-02 3.795189E-07 7.232214E-05 2.296325E-02 -1.196949E-03 # Covariance matrix: 7.4122E-13 1.9824E-12 -8.7837E-16 2.4916E-14 2.0629E-12 2.1384E-10 1.9824E-12 1.0239E-09 -7.0109E-13 1.8047E-11 4.0652E-10 1.3926E-07 -8.7837E-16 -7.0109E-13 3.9696E-13 -3.7255E-13 -2.7609E-13 -9.5634E-11 2.4916E-14 1.8047E-11 -3.7255E-13 9.2910E-13 7.1147E-12 2.4611E-09 2.0629E-12 4.0652E-10 -2.7609E-13 7.1147E-12 1.6527E-10 5.4972E-08 2.1384E-10 1.3926E-07 -9.5634E-11 2.4611E-09 5.4972E-08 1.8984E-05 # lat0 lon0 xBary yBary zBary JD0 -0.949680 -8.358170 0.293042 -0.015923 -0.960797 2458723.711696 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 261.91973 +/- 47.197 Argument of Peri: 26.14982 +/- 44.676 Long of Asc Node: 69.93573 +/- 0.227 Inclination: 0.94748 +/- 0.001 Eccentricity: 0.06036578 +/- 0.1942 Semi-Major Axis: 43.98594236 +/- 0.8796 Time of Perihelion: 2487750.5942 +/- 13942.5 Perihelion: 41.33069680 +/- 8.5820 Aphelion: 46.64118792 +/- 8.5929 Period (y) 291.7286 +/- 8.75 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 43.99034391 +/- 0.0241 Ecliptic Y -6.76585419 +/- 0.0036 Ecliptic Z -0.72175514 +/- 0.0004 Ecliptic XDOT 0.00023918 +/- 0.0005 Ecliptic YDOT 0.00255160 +/- 0.0001 Ecliptic ZDOT 0.00001076 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.51345943 +/- 0.0238 Geocenter to KBO 43.54784086 +/- 0.0244 # Hcoef: 8.50
The following table shows the complete astrometric record for 19SL235. 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 (19SL235) followed by the observatory code and reference code for the source of the astrometry.
2019 08 28.210895 23 30 47.593 -04 11 14.84 24.9r 19SL235 W84 C~7XM7 2019 08 28.388381 23 30 46.869 -04 11 19.40 24.9r 19SL235 W84 C~7XM7 2019 09 29.013696 23 28 34.977 -04 25 24.89 24.9r 19SL235 W84 C~7XM7 2019 09 29.177510 23 28 34.303 -04 25 29.36 24.9r 19SL235 W84 C~7XM7 2020 10 17.010669 23 31 54.976 -04 03 32.92 24.9r 19SL235 W84 C~7XM7 2020 10 17.174574 23 31 54.385 -04 03 36.44 24.9r 19SL235 W84 C~7XM7 2020 10 18.012125 23 31 51.506 -04 03 54.37 24.9r 19SL235 W84 C~7XM7 2020 10 18.176134 23 31 50.917 -04 03 57.87 24.9r 19SL235 W84 C~7XM7
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 0.01 0.00 -0.07
2 0.0005 -11.75 -0.01 0.08 0.00
3 0.0871 -2158.17 0.00 0.91 0.17
4 0.0875 -2169.20 -0.00 0.77 -0.09
5 1.1384 1108.61 0.04 26.43 -0.04
6 1.1388 1099.10 -0.06 26.68 0.02
7 1.1411 1052.44 0.10 27.22 -0.03
8 1.1416 1042.96 -0.08 27.49 0.04
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.
19SL235 quality flag:1 Type: CLASSICAL CENTAURR CLASSICAL axisobj 44.072 64.342 44.000 ecceobj 0.064 0.586 0.035 incobj 0.948 0.950 0.948 qmin 39.915 26.236 41.173 qmax 48.244 111.439 46.794 amean 43.942 66.138 43.876 amin 43.584 63.624 43.539 amax 44.310 69.132 44.227 emean 0.072 0.595 0.043 emin 0.055 0.579 0.026 emax 0.089 0.612 0.059 imean 0.956 1.263 0.986 imin 0.000 1.022 0.143 imax 1.579 1.558 1.548 excite_mean 0.075 0.596 0.047 fracstop 1.000 0.010 1.000 cjmean 3.094 2.836 3.097 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 178.2 217.5 174.5 kozaiamp 180.0 166.4 180.0