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: 21RC237 # Created Sun Apr 27 01:11:27 2025 # Orbit generated from Bernstein formalism # Fitting 10 observations of 10 # Arc: 2.11y # First observation: 2019/08/29 # Last observation: 2021/10/07 Preliminary a, adot, b, bdot, g, gdot: 0.000010 0.023736 -0.000000 -0.000023 0.023973 0.000000 # Chi-squared of fit: 0.62 DOF: 14 RMS: 0.04 # Min/Max residuals: -0.09 0.08 # Exact a, adot, b, bdot, g, gdot: 1.564118E-05 2.378529E-02 -2.089761E-07 -2.238185E-05 2.397333E-02 1.426453E-03 # Covariance matrix: 7.2872E-13 -1.8454E-12 4.8571E-16 1.3311E-15 -1.3594E-12 -3.1217E-11 -1.8454E-12 5.4599E-11 -3.8583E-14 -4.3999E-14 6.0953E-11 1.0746E-09 4.8571E-16 -3.8583E-14 5.6029E-13 -3.2282E-13 -4.4921E-14 -7.5763E-13 1.3311E-15 -4.3999E-14 -3.2282E-13 2.5268E-13 -4.9075E-14 -8.7084E-13 -1.3594E-12 6.0953E-11 -4.4921E-14 -4.9075E-14 6.9326E-11 1.2021E-09 -3.1217E-11 1.0746E-09 -7.5763E-13 -8.7084E-13 1.2021E-09 2.1257E-08 # lat0 lon0 xBary yBary zBary JD0 -1.378306 -9.031535 0.265288 -0.023299 -0.968539 2458724.712719 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 35.54785 +/- 2.509 Argument of Peri: 225.09669 +/- 3.221 Long of Asc Node: 83.36540 +/- 0.052 Inclination: 1.34845 +/- 0.000 Eccentricity: 0.08995564 +/- 0.0041 Semi-Major Axis: 45.90499363 +/- 0.0100 Time of Perihelion: 2447502.9216 +/- 791.7 Perihelion: 41.77558032 +/- 0.1883 Aphelion: 50.03440694 +/- 0.1884 Period (y) 311.0270 +/- 0.10 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 42.10196052 +/- 0.0143 Ecliptic Y -6.96717368 +/- 0.0023 Ecliptic Z -1.00335913 +/- 0.0003 Ecliptic XDOT 0.00059565 +/- 0.0000 Ecliptic YDOT 0.00265772 +/- 0.0000 Ecliptic ZDOT -0.00000670 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.68633643 +/- 0.0141 Geocenter to KBO 41.71302426 +/- 0.0145 # Hcoef: 8.20
The following table shows the complete astrometric record for 21RC237. 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 (21RC237) followed by the observatory code and reference code for the source of the astrometry.
2019 08 29.211918 23 28 59.357 -04 50 48.74 24.5r 21RC237 W84 C~7XPn 2019 08 29.387113 23 28 58.615 -04 50 53.57 24.5r 21RC237 W84 C~7XPn 2020 10 16.001792 23 30 38.197 -04 40 03.82 24.4r 21RC237 W84 C~7XPn 2020 10 16.175804 23 30 37.551 -04 40 07.79 24.4r 21RC237 W84 C~7XPn 2020 10 17.010669 23 30 34.566 -04 40 25.90 24.4r 21RC237 W84 C~7XPn 2020 10 17.174574 23 30 33.972 -04 40 29.51 24.4r 21RC237 W84 C~7XPn 2021 09 05.096099 23 38 30.819 -03 49 39.12 24.3r 21RC237 W84 C~7XPn 2021 09 05.195929 23 38 30.376 -03 49 41.87 24.3r 21RC237 W84 C~7XPn 2021 10 07.004805 23 36 14.358 -04 04 12.59 24.5r 21RC237 W84 C~7XPn 2021 10 07.169933 23 36 13.676 -04 04 16.74 24.5r 21RC237 W84 C~7XPn
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 0.04
2 0.0005 -12.10 -0.01 -0.07 -0.01
3 1.1329 1612.12 0.05 9.69 0.01
4 1.1334 1601.67 -0.06 9.86 -0.09
5 1.1357 1553.52 0.00 10.83 0.03
6 1.1361 1543.94 0.01 11.02 -0.03
7 2.0202 9308.01 0.08 -12.63 -0.02
8 2.0205 9300.82 -0.08 -12.52 0.08
9 2.1076 7083.48 0.03 -4.02 -0.02
10 2.1080 7072.45 -0.03 -3.78 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.
21RC237 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.929 46.003 45.873 ecceobj 0.089 0.100 0.081 incobj 1.349 1.349 1.349 qmin 41.233 40.799 41.563 qmax 50.619 51.233 50.179 amean 45.802 45.878 45.745 amin 45.434 45.499 45.366 amax 46.195 46.280 46.145 emean 0.083 0.094 0.075 emin 0.070 0.080 0.062 emax 0.096 0.107 0.088 imean 0.559 0.576 0.549 imin 0.020 0.020 0.020 imax 0.849 0.868 0.845 excite_mean 0.084 0.095 0.076 fracstop 1.000 1.000 1.000 cjmean 3.115 3.114 3.116 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 180.9 179.5 182.2 kozaiamp 179.9 179.9 179.9