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: 21RV237 # Created Mon Apr 28 01:11:27 2025 # Orbit generated from Bernstein formalism # Fitting 8 observations of 8 # Arc: 2.02y # First observation: 2019/09/29 # Last observation: 2021/10/06 Preliminary a, adot, b, bdot, g, gdot: 0.000005 0.028022 0.000017 -0.015374 0.026209 0.000000 # Chi-squared of fit: 1.11 DOF: 10 RMS: 0.07 # Min/Max residuals: -0.11 0.10 # Exact a, adot, b, bdot, g, gdot: 1.662133E-05 2.808255E-02 -9.219108E-06 -1.539542E-02 2.601466E-02 1.134273E-03 # Covariance matrix: 7.0243E-13 -8.4336E-13 -4.3649E-14 2.6671E-13 -1.8887E-13 -8.4267E-12 -8.4336E-13 6.3763E-12 5.6260E-13 -3.4737E-12 7.7469E-12 1.0977E-10 -4.3649E-14 5.6260E-13 6.6813E-13 -6.6543E-13 7.3746E-13 1.0150E-11 2.6671E-13 -3.4737E-12 -6.6543E-13 2.2586E-12 -4.5806E-12 -6.2701E-11 -1.8887E-13 7.7469E-12 7.3746E-13 -4.5806E-12 1.4187E-11 1.4476E-10 -8.4267E-12 1.0977E-10 1.0150E-11 -6.2701E-11 1.4476E-10 1.9814E-09 # lat0 lon0 xBary yBary zBary JD0 -0.474587 -9.255357 -0.258952 -0.007984 -0.965614 2458755.514497 # Heliocentric elements and errors Epoch: 2458750.5000 = 2019/09/24 Mean Anomaly: 1.97173 +/- 0.063 Argument of Peri: 173.68514 +/- 0.233 Long of Asc Node: 170.26620 +/- 0.000 Inclination: 28.72423 +/- 0.001 Eccentricity: 0.51833085 +/- 0.0003 Semi-Major Axis: 81.59549682 +/- 0.0720 Time of Perihelion: 2457276.0076 +/- 46.9 Perihelion: 39.30203392 +/- 0.0448 Aphelion: 123.88895973 +/- 0.1130 Period (y) 737.0679 +/- 0.98 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 38.93594933 +/- 0.0055 Ecliptic Y -6.08893279 +/- 0.0009 Ecliptic Z -0.31876847 +/- 0.0001 Ecliptic XDOT 0.00058841 +/- 0.0000 Ecliptic YDOT 0.00290089 +/- 0.0000 Ecliptic ZDOT -0.00162142 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.41046646 +/- 0.0054 Geocenter to KBO 38.43985701 +/- 0.0056 # Hcoef: 8.88
The following table shows the complete astrometric record for 21RV237. 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 (21RV237) followed by the observatory code and reference code for the source of the astrometry.
2019 09 29.013696 23 26 44.137 -04 06 15.78 24.8r 21RV237 W84 C~7XPo 2019 09 29.177510 23 26 43.415 -04 06 21.76 24.8r 21RV237 W84 C~7XPo 2020 10 18.012125 23 32 45.143 -04 27 55.29 24.8r 21RV237 W84 C~7XPo 2020 10 18.176134 23 32 44.556 -04 28 00.29 24.8r 21RV237 W84 C~7XPo 2021 09 09.073508 23 42 47.705 -04 14 40.00 24.7r 21RV237 W84 C~7XPo 2021 09 09.192572 23 42 47.184 -04 14 44.62 24.7r 21RV237 W84 C~7XPo 2021 10 06.002765 23 40 50.463 -04 31 19.44 24.7r 21RV237 W84 C~7XPo 2021 10 06.167954 23 40 49.782 -04 31 25.29 24.7r 21RV237 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 0.09 0.00 -0.03
2 0.0004 -12.28 -0.08 -1.25 0.05
3 1.0541 4450.42 -0.07 -3325.18 -0.03
4 1.0545 4440.37 0.04 -3326.30 -0.02
5 1.9468 13058.76 -0.03 -6180.62 0.09
6 1.9471 13049.73 0.02 -6181.74 -0.02
7 2.0205 11044.74 -0.08 -6398.21 0.07
8 2.0210 11033.03 0.10 -6399.52 -0.11
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.
21RV237 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 81.580 81.776 81.386 ecceobj 0.519 0.520 0.517 incobj 28.689 28.689 28.689 qmin 37.323 37.355 37.183 qmax 127.160 127.460 127.020 amean 80.992 81.144 80.822 amin 79.842 79.985 79.655 amax 82.622 82.801 82.481 emean 0.521 0.521 0.521 emin 0.506 0.506 0.505 emax 0.539 0.539 0.540 imean 27.556 27.567 27.474 imin 26.717 26.755 26.574 imax 28.328 28.347 28.312 excite_mean 0.696 0.697 0.696 fracstop 1.000 1.000 1.000 cjmean 2.854 2.854 2.854 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 238.2 241.9 233.3 kozaiamp 180.0 179.9 180.0