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: 20BA95
# Created Tue Apr 1 01:11:18 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 12 observations of 12
# Arc: 5.08y
# First observation: 2020/01/25
# Last observation: 2025/02/23
# Chi-squared of fit: 3.85 DOF: 18 RMS: 0.10
# Min/Max residuals: -0.18 0.24
# Exact a, adot, b, bdot, g, gdot:
9.592205E-06 8.886454E-03 -3.189778E-06 -2.851980E-03 1.464932E-02 2.668025E-03
# Covariance matrix:
6.2630E-13 -6.3022E-13 -1.2997E-13 2.0266E-13 -2.8966E-13 -1.2789E-11
-6.3022E-13 2.0964E-12 5.3952E-13 -8.6449E-13 -7.0232E-13 5.4351E-11
-1.2997E-13 5.3952E-13 4.0123E-13 -2.9801E-13 -2.2173E-13 1.4387E-11
2.0266E-13 -8.6449E-13 -2.9801E-13 4.0311E-13 3.6781E-13 -2.3105E-11
-2.8966E-13 -7.0232E-13 -2.2173E-13 3.6781E-13 1.3155E-12 -2.3017E-11
-1.2789E-11 5.4351E-11 1.4387E-11 -2.3105E-11 -2.3017E-11 1.4522E-09
# lat0 lon0 xBary yBary zBary JD0
4.683688 119.084908 -0.092473 0.080722 -0.985177 2458873.791211
# Heliocentric elements and errors
Epoch: 2458874.5000 = 2020/01/26
Mean Anomaly: 116.01132 +/- 0.574
Argument of Peri: 19.74395 +/- 0.418
Long of Asc Node: 313.17787 +/- 0.001
Inclination: 18.44189 +/- 0.001
Eccentricity: 0.35816510 +/- 0.0014
Semi-Major Axis: 55.97959370 +/- 0.0926
Time of Perihelion: 2409575.1834 +/- 272.8
Perihelion: 35.92965700 +/- 0.0990
Aphelion: 76.02953040 +/- 0.1486
Period (y) 418.8445 +/- 1.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -33.62987792 +/- 0.0026
Ecliptic Y 60.26666139 +/- 0.0046
Ecliptic Z 5.57371107 +/- 0.0005
Ecliptic XDOT -0.00170583 +/- 0.0000
Ecliptic YDOT -0.00033276 +/- 0.0000
Ecliptic ZDOT -0.00049075 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 69.23928228 +/- 0.0042
Geocenter to KBO 68.26240454 +/- 0.0053
# Hcoef: 5.71
The following table shows the complete astrometric record for 20BA95. 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 (20BA95) followed by the observatory code and reference code for the source of the astrometry.
2020 01 25.29041 08 09 09.931 +24 55 16.81 23.8G 20BA95 568 C~5Jza 2020 01 25.52351 08 09 09.110 +24 55 18.75 24.0G 20BA95 568 C~5Jza 2020 12 16.26782 08 13 17.359 +24 33 09.71 24.0r 20BA95 304 C~5Jza 2020 12 16.30578 08 13 17.268 +24 33 09.96 24.0r 20BA95 304 C~5Jza 2020 12 17.35245 08 13 14.406 +24 33 19.68 23.8r 20BA95 304 C~5Jza 2021 01 15.21754 08 11 43.142 +24 37 50.88 20BA95 304 C~5Jza 2021 01 16.18680 08 11 39.827 +24 37 59.71 20BA95 304 C~5Jza 2021 12 06.28775 08 15 41.459 +24 15 32.89 24.2r 20BA95 304 C~5Jza 2021 12 07.29898 08 15 39.195 +24 15 41.05 24.1r 20BA95 304 C~5Jza 2025 02 23.134220 08 17 32.447 +23 38 19.80 24.1G 20BA95 G37 C~8ijk 2025 02 23.179360 08 17 32.315 +23 38 20.13 20BA95 G37 C~8ijk 2025 02 23.235270 08 17 32.179 +23 38 20.35 20BA95 G37 C~8ijk
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 0.02
2 0.0006 0.00 -0.07 0.00 0.04
3 0.8925 0.00 -0.04 0.00 -0.09
4 0.8926 0.00 0.17 0.00 -0.18
5 0.8954 0.00 0.05 0.00 -0.01
6 0.9745 0.00 -0.02 0.00 -0.05
7 0.9771 0.00 0.07 0.00 -0.00
8 1.8645 0.00 -0.02 0.00 0.24
9 1.8672 0.00 -0.05 0.00 0.05
10 5.0810 0.00 -0.09 0.00 -0.04
11 5.0811 0.00 -0.14 0.00 0.04
12 5.0813 0.00 0.21 0.00 -0.04
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.
20BA95 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 56.551 56.551 56.551 ecceobj 0.355 0.355 0.355 incobj 18.365 18.365 18.365 qmin 34.961 35.071 35.056 qmax 78.518 78.622 78.265 amean 56.212 56.158 56.210 amin 55.471 55.407 55.500 amax 57.062 57.114 57.070 emean 0.360 0.357 0.357 emin 0.343 0.339 0.340 emax 0.378 0.377 0.374 imean 19.513 19.513 19.569 imin 18.795 18.848 18.868 imax 20.378 20.139 20.213 excite_mean 0.491 0.489 0.490 fracstop 1.000 1.000 1.000 cjmean 2.939 2.941 2.940 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 173.4 170.6 173.7 kozaiamp 180.0 180.0 180.0