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: 21RV236
# Created Mon Apr 28 01:11:27 2025
# Orbit generated from Bernstein formalism
# Fitting 10 observations of 10
# Arc: 2.02y
# First observation: 2019/09/29
# Last observation: 2021/10/04
Preliminary a, adot, b, bdot, g, gdot:
0.000003 0.029574 -0.000000 0.000146 0.026540 0.000000
# Chi-squared of fit: 4.97 DOF: 14 RMS: 0.12
# Min/Max residuals: -0.23 0.31
# Exact a, adot, b, bdot, g, gdot:
1.804240E-05 2.968555E-02 4.056587E-08 1.460948E-04 2.643160E-02 2.027990E-03
# Covariance matrix:
7.3175E-13 -1.2280E-12 6.5619E-16 -4.4100E-15 -6.5781E-13 -1.4561E-11
-1.2280E-12 1.1100E-11 -7.0444E-15 5.5311E-14 1.2679E-11 1.8233E-10
6.5619E-16 -7.0444E-15 6.1374E-13 -3.3215E-13 -7.5611E-15 -1.1743E-13
-4.4100E-15 5.5311E-14 -3.3215E-13 2.3700E-13 6.5895E-14 9.3004E-13
-6.5781E-13 1.2679E-11 -7.5611E-15 6.5895E-14 1.8210E-11 2.1702E-10
-1.4561E-11 1.8233E-10 -1.1743E-13 9.3004E-13 2.1702E-10 3.0657E-09
# lat0 lon0 xBary yBary zBary JD0
0.258125 -8.857642 -0.252243 0.004373 -0.967411 2458755.514497
# Heliocentric elements and errors
Epoch: 2458750.5000 = 2019/09/24
Mean Anomaly: 12.46615 +/- 0.271
Argument of Peri: 20.64147 +/- 0.506
Long of Asc Node: 309.12800 +/- 0.102
Inclination: 0.37334 +/- 0.001
Eccentricity: 0.25899988 +/- 0.0006
Semi-Major Axis: 51.60351182 +/- 0.0208
Time of Perihelion: 2454061.8558 +/- 101.9
Perihelion: 38.23820850 +/- 0.0352
Aphelion: 64.96881513 +/- 0.0411
Period (y) 370.7038 +/- 0.22
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 38.37975942 +/- 0.0060
Ecliptic Y -5.73217564 +/- 0.0009
Ecliptic Z 0.17042943 +/- 0.0000
Ecliptic XDOT 0.00068946 +/- 0.0000
Ecliptic YDOT 0.00300682 +/- 0.0000
Ecliptic ZDOT 0.00001585 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 38.80583483 +/- 0.0060
Geocenter to KBO 37.83350751 +/- 0.0061
# Hcoef: 9.14
The following table shows the complete astrometric record for 21RV236. 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 (21RV236) followed by the observatory code and reference code for the source of the astrometry.
2019 09 29.013696 23 27 02.699 -03 16 27.38 25.0r 21RV236 W84 C~7XPn 2019 09 29.177510 23 27 01.954 -03 16 32.09 25.0r 21RV236 W84 C~7XPn 2020 10 21.004397 23 31 43.023 -02 45 56.79 25.0r 21RV236 W84 C~7XPn 2020 10 21.174149 23 31 42.385 -02 46 01.03 25.0r 21RV236 W84 C~7XPn 2021 09 06.108763 23 41 13.914 -01 43 59.20 24.7r 21RV236 W84 C~7XPn 2021 09 06.196686 23 41 13.495 -01 44 01.80 24.7r 21RV236 W84 C~7XPn 2021 10 01.020278 23 39 18.632 -01 56 23.08 25.0r 21RV236 W84 C~7XPn 2021 10 01.164836 23 39 18.005 -01 56 27.66 25.0r 21RV236 W84 C~7XPn 2021 10 04.002582 23 39 05.304 -01 57 49.86 25.0r 21RV236 W84 C~7XPn 2021 10 04.175328 23 39 04.521 -01 57 54.71 25.0r 21RV236 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 -0.06 0.00 0.01
2 0.0004 -12.11 0.06 0.06 0.01
3 1.0623 4581.36 0.15 27.20 0.07
4 1.0627 4570.90 -0.15 27.07 -0.10
5 1.9387 13931.03 0.08 57.91 -0.02
6 1.9389 13924.20 -0.08 58.01 0.03
7 2.0069 12041.93 -0.20 59.33 0.31
8 2.0073 12031.45 0.16 58.85 -0.23
9 2.0150 11823.37 0.02 58.74 -0.10
10 2.0155 11810.63 0.01 58.93 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.
21RV236 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 51.607 51.680 51.534 ecceobj 0.259 0.261 0.257 incobj 0.379 0.379 0.379 qmin 37.655 37.586 37.690 qmax 65.811 66.114 65.679 amean 51.365 51.479 51.337 amin 50.859 50.965 50.848 amax 52.013 52.113 51.936 emean 0.253 0.256 0.252 emin 0.242 0.244 0.241 emax 0.266 0.269 0.265 imean 2.006 1.985 2.008 imin 1.651 1.643 1.658 imax 2.357 2.385 2.360 excite_mean 0.256 0.258 0.255 fracstop 1.000 1.000 1.000 cjmean 3.111 3.111 3.112 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 180.1 187.1 179.9 kozaiamp 179.9 179.9 180.0