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: 19SM235 # Created Mon Apr 28 01:11:17 2025 # Orbit generated from Bernstein formalism # Fitting 8 observations of 8 # Arc: 2.11y # First observation: 2019/08/28 # Last observation: 2021/10/07 Preliminary a, adot, b, bdot, g, gdot: 0.000000 0.023412 -0.000000 0.000626 0.024097 0.000000 # Chi-squared of fit: 1.18 DOF: 10 RMS: 0.07 # Min/Max residuals: -0.14 0.09 # Exact a, adot, b, bdot, g, gdot: 1.491918E-05 2.336693E-02 -3.969779E-08 6.242178E-04 2.407963E-02 -1.132592E-03 # Covariance matrix: 7.4095E-13 1.9396E-12 -2.6237E-15 6.9510E-14 1.7856E-12 5.1664E-11 1.9396E-12 6.4414E-10 -9.6642E-13 2.4139E-11 1.4204E-10 1.7839E-08 -2.6237E-15 -9.6642E-13 3.8406E-13 -2.2148E-13 -2.1105E-13 -2.6784E-11 6.9510E-14 2.4139E-11 -2.2148E-13 1.0771E-12 5.2864E-12 6.6891E-10 1.7856E-12 1.4204E-10 -2.1105E-13 5.2864E-12 3.6267E-11 3.9079E-09 5.1664E-11 1.7839E-08 -2.6784E-11 6.6891E-10 3.9079E-09 4.9435E-07 # lat0 lon0 xBary yBary zBary JD0 -1.249193 -8.016697 0.298764 -0.020907 -0.958937 2458723.711696 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 291.70396 +/- 7.171 Argument of Peri: 35.56406 +/- 10.481 Long of Asc Node: 30.30990 +/- 0.020 Inclination: 1.95052 +/- 0.001 Eccentricity: 0.05532968 +/- 0.0288 Semi-Major Axis: 43.26058858 +/- 0.0670 Time of Perihelion: 2478437.0105 +/- 2069.6 Perihelion: 40.86699419 +/- 1.2483 Aphelion: 45.65418298 +/- 1.2487 Period (y) 284.5423 +/- 0.66 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 42.02420105 +/- 0.0103 Ecliptic Y -6.22690787 +/- 0.0015 Ecliptic Z -0.90536197 +/- 0.0002 Ecliptic XDOT 0.00025303 +/- 0.0001 Ecliptic YDOT 0.00264916 +/- 0.0000 Ecliptic ZDOT 0.00007354 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.49267626 +/- 0.0102 Geocenter to KBO 41.52886881 +/- 0.0104 # Hcoef: 9.05
The following table shows the complete astrometric record for 19SM235. 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 (19SM235) followed by the observatory code and reference code for the source of the astrometry.
2019 08 28.210895 23 32 31.542 -04 19 40.24 25.2r 19SM235 W84 C~7XM7 2019 08 28.388381 23 32 30.783 -04 19 45.16 25.2r 19SM235 W84 C~7XM7 2019 09 29.013696 23 30 13.213 -04 34 18.18 25.1r 19SM235 W84 C~7XM7 2019 09 29.177510 23 30 12.494 -04 34 22.39 25.1r 19SM235 W84 C~7XM7 2021 10 04.002582 23 39 37.274 -03 28 55.71 25.4r 19SM235 W84 C~7XM8 2021 10 04.175328 23 39 36.540 -03 29 00.19 25.4r 19SM235 W84 C~7XM8 2021 10 07.004805 23 39 24.758 -03 30 13.37 25.2r 19SM235 W84 C~7XM8 2021 10 07.169933 23 39 24.059 -03 30 17.77 25.2r 19SM235 W84 C~7XM8
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 0.09
2 0.0005 -12.37 -0.09 -0.04 0.01
3 0.0871 -2247.34 0.02 9.75 -0.14
4 0.0875 -2258.88 -0.02 10.12 0.03
5 2.1021 7058.66 -0.05 272.64 -0.04
6 2.1026 7046.78 0.04 272.89 -0.02
7 2.1103 6855.60 0.08 275.74 0.09
8 2.1108 6844.24 -0.07 275.86 -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.
19SM235 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.340 43.706 43.289 ecceobj 0.060 0.038 0.072 incobj 1.950 1.949 1.950 qmin 39.239 41.316 38.430 qmax 47.468 46.068 48.146 amean 43.216 43.590 43.164 amin 42.864 43.248 42.812 amax 43.582 43.936 43.537 emean 0.070 0.032 0.084 emin 0.048 0.013 0.062 emax 0.089 0.049 0.107 imean 1.579 1.744 1.657 imin 0.413 0.914 0.176 imax 2.501 2.441 2.543 excite_mean 0.076 0.045 0.090 fracstop 1.000 1.000 1.000 cjmean 3.085 3.094 3.082 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 178.7 200.2 174.9 kozaiamp 180.0 179.9 180.0