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: 20BS60 # Created Sun Apr 27 01:11:19 2025 # Orbit generated from Bernstein formalism # Fitting 5 observations of 5 # Arc: 0.97y # First observation: 2020/01/26 # Last observation: 2021/01/15 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.009761 -0.000000 0.002772 0.015269 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 1.08 DOF: 5 RMS: 0.08 # Min/Max residuals: -0.11 0.20 # Exact a, adot, b, bdot, g, gdot: 1.027518E-05 9.677130E-03 2.798427E-06 2.758418E-03 1.530471E-02 -6.394771E-03 # Covariance matrix: 9.3192E-13 1.8692E-11 -1.1356E-14 5.1531E-12 2.3016E-11 1.9573E-09 1.8692E-11 1.9131E-09 -1.1150E-12 5.0549E-10 2.2584E-09 1.9201E-07 -1.1356E-14 -1.1150E-12 7.3388E-13 -1.0944E-12 -1.3423E-12 -1.1279E-10 5.1531E-12 5.0549E-10 -1.0944E-12 1.3520E-10 5.9854E-10 5.0816E-08 2.3016E-11 2.2584E-09 -1.3423E-12 5.9854E-10 2.6895E-09 2.2752E-07 1.9573E-09 1.9201E-07 -1.1279E-10 5.0816E-08 2.2752E-07 1.9307E-05 # lat0 lon0 xBary yBary zBary JD0 -14.359451 122.250646 -0.051879 -0.245860 -0.960540 2458874.599181 # Heliocentric elements and errors Epoch: 2458870.5000 = 2020/01/22 Mean Anomaly: 302.24862 +/- 42.052 Argument of Peri: 78.97528 +/- 17.666 Long of Asc Node: 162.57932 +/- 0.163 Inclination: 21.30069 +/- 0.066 Eccentricity: 0.53750454 +/- 0.2715 Semi-Major Axis: 67.21871613 +/- 27.9985 Time of Perihelion: 2491162.3990 +/- 12075.5 Perihelion: 31.08835105 +/- 22.3796 Aphelion: 103.34908120 +/- 46.7577 Period (y) 551.1166 +/- 344.33 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -34.34693731 +/- 0.1144 Ecliptic Y 54.33572723 +/- 0.1814 Ecliptic Z -16.20433762 +/- 0.0549 Ecliptic XDOT -0.00092970 +/- 0.0004 Ecliptic YDOT -0.00175528 +/- 0.0006 Ecliptic ZDOT 0.00076151 +/- 0.0002 # Distances at JD0 (AU) Heliocenter to KBO 66.29226135 +/- 0.1606 Geocenter to KBO 65.33936769 +/- 0.2214 # Hcoef: 6.39
The following table shows the complete astrometric record for 20BS60. 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 (20BS60) followed by the observatory code and reference code for the source of the astrometry.
2020 01 26.09838 08 05 11.242 +05 38 40.96 24.6r 20BS60 807 C~4Zh3 2020 01 27.11765 08 05 07.970 +05 38 54.01 24.7r 20BS60 807 C~4Zh3 2020 12 16.24564 08 09 32.598 +05 35 49.77 24.3r 20BS60 304 C~4Zh3 2020 12 17.26201 08 09 29.973 +05 35 51.87 24.4r 20BS60 304 C~4Zh3 2021 01 15.14489 08 08 03.420 +05 38 53.31 24.5r 20BS60 304 C~4Zh3
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 0.0028 -50.50 0.06 2.33 -0.02
3 0.8902 3848.06 -0.00 668.60 -0.11
4 0.8930 3809.32 -0.00 662.21 0.20
5 0.9721 2508.14 0.01 561.84 -0.09
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.
20BS60 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0