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: 21RS237 # Created Mon Apr 28 01:11:27 2025 # Orbit generated from Bernstein formalism # Fitting 10 observations of 10 # Arc: 2.10y # First observation: 2019/08/28 # Last observation: 2021/10/03 Preliminary a, adot, b, bdot, g, gdot: 0.000004 0.023265 0.000001 -0.000507 0.024083 0.000000 # Chi-squared of fit: 0.78 DOF: 14 RMS: 0.05 # Min/Max residuals: -0.09 0.08 # Exact a, adot, b, bdot, g, gdot: 1.523110E-05 2.323508E-02 -3.566880E-07 -5.059733E-04 2.400876E-02 7.682141E-05 # Covariance matrix: 7.2758E-13 -1.9819E-12 -6.1231E-15 3.7862E-14 -1.5106E-12 -3.4801E-11 -1.9819E-12 9.8014E-11 3.5406E-13 -2.2018E-12 1.0633E-10 2.0259E-09 -6.1231E-15 3.5406E-13 6.2649E-13 -3.3564E-13 3.8447E-13 7.3358E-12 3.7862E-14 -2.2018E-12 -3.3564E-13 2.7404E-13 -2.3917E-12 -4.5617E-11 -1.5106E-12 1.0633E-10 3.8447E-13 -2.3917E-12 1.1673E-10 2.2007E-09 -3.4801E-11 2.0259E-09 7.3358E-12 -4.5617E-11 2.2007E-09 4.1972E-08 # lat0 lon0 xBary yBary zBary JD0 -0.082279 -8.284780 0.294273 -0.001376 -0.960551 2458723.711696 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 357.25620 +/- 38.232 Argument of Peri: 186.48137 +/- 39.241 Long of Asc Node: 167.63509 +/- 0.005 Inclination: 1.25440 +/- 0.001 Eccentricity: 0.01298081 +/- 0.0008 Semi-Major Axis: 43.17669970 +/- 0.0361 Time of Perihelion: 2459510.3106 +/- 11005.3 Perihelion: 42.61623099 +/- 0.0499 Aphelion: 43.73716842 +/- 0.0506 Period (y) 283.7150 +/- 0.36 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 42.12770945 +/- 0.0185 Ecliptic Y -6.43827764 +/- 0.0027 Ecliptic Z -0.05982605 +/- 0.0000 Ecliptic XDOT 0.00039884 +/- 0.0000 Ecliptic YDOT 0.00262129 +/- 0.0000 Ecliptic ZDOT -0.00005794 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.61688517 +/- 0.0183 Geocenter to KBO 41.65146957 +/- 0.0187 # Hcoef: 7.98
The following table shows the complete astrometric record for 21RS237. 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 (21RS237) followed by the observatory code and reference code for the source of the astrometry.
2019 08 28.210895 23 29 41.519 -03 21 41.18 24.2r 21RS237 W84 C~7XPo 2019 08 28.388381 23 29 40.769 -03 21 45.99 24.2r 21RS237 W84 C~7XPo 2020 10 21.004397 23 30 53.246 -03 16 09.31 24.3r 21RS237 W84 C~7XPo 2020 10 21.174149 23 30 52.662 -03 16 12.88 24.3r 21RS237 W84 C~7XPo 2021 09 04.092679 23 39 05.204 -02 24 57.73 24.1r 21RS237 W84 C~7XPo 2021 09 04.195842 23 39 04.750 -02 25 00.74 24.1r 21RS237 W84 C~7XPo 2021 09 06.108763 23 38 56.590 -02 25 54.07 24.1r 21RS237 W84 C~7XPo 2021 09 06.196686 23 38 56.199 -02 25 56.62 24.1r 21RS237 W84 C~7XPo 2021 10 03.011907 23 37 00.126 -02 38 34.58 24.2r 21RS237 W84 C~7XPo 2021 10 03.165173 23 36 59.474 -02 38 38.73 24.2r 21RS237 W84 C~7XPo
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 0.00
2 0.0005 -12.22 -0.02 0.01 -0.01
3 1.1493 1117.93 -0.05 -118.71 -0.06
4 1.1498 1108.49 0.05 -118.54 0.06
5 2.0202 9107.95 0.08 -212.03 0.02
6 2.0205 9100.50 -0.09 -212.10 -0.05
7 2.0257 8966.83 0.08 -212.61 0.06
8 2.0260 8960.42 -0.06 -212.63 0.04
9 2.0994 7060.20 0.00 -219.78 -0.04
10 2.0998 7049.58 -0.01 -219.72 -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.
21RS237 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.229 43.287 43.196 ecceobj 0.016 0.028 0.017 incobj 1.246 1.246 1.245 qmin 41.335 40.680 41.516 qmax 45.033 45.874 44.809 amean 43.116 43.173 43.084 amin 42.784 42.833 42.756 amax 43.449 43.526 43.418 emean 0.021 0.037 0.018 emin 0.000 0.017 0.000 emax 0.037 0.054 0.033 imean 2.352 2.319 2.386 imin 1.363 1.320 1.386 imax 3.057 3.046 3.085 excite_mean 0.046 0.055 0.045 fracstop 1.000 1.000 1.000 cjmean 3.088 3.088 3.088 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 188.5 192.5 175.8 kozaiamp 180.0 180.0 179.9