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: 20KF55
# Created Mon Apr 28 01:11:21 2025
# Orbit generated from Bernstein formalism
# Fitting 15 observations of 15
# Arc: 74.98d
# First observation: 2020/05/30
# Last observation: 2020/08/13
Preliminary a, adot, b, bdot, g, gdot:
-0.000002 0.017549 0.000006 -0.005566 0.023692 0.000000
# Chi-squared of fit: 0.12 DOF: 24 RMS: 0.02
# Min/Max residuals: -0.02 0.04
# Exact a, adot, b, bdot, g, gdot:
1.562809E-05 2.465774E-02 -3.497579E-06 -5.562101E-03 2.491831E-02 4.964623E-03
# Covariance matrix:
5.7270E-13 1.5361E-10 -1.2393E-13 -8.9122E-13 3.0502E-11 8.3311E-10
1.5361E-10 2.7639E-07 -2.3219E-10 -8.9155E-10 5.1600E-08 8.9616E-07
-1.2393E-13 -2.3219E-10 4.2581E-13 -9.4958E-13 -4.3314E-11 -7.4446E-10
-8.9122E-13 -8.9155E-10 -9.4958E-13 2.4891E-11 -1.6877E-10 -3.3955E-09
3.0502E-11 5.1600E-08 -4.3314E-11 -1.6877E-10 9.6431E-09 1.6927E-07
8.3311E-10 8.9616E-07 -7.4446E-10 -3.3955E-09 1.6927E-07 3.3320E-06
# lat0 lon0 xBary yBary zBary JD0
2.401214 -72.490974 0.631160 0.032859 -0.786656 2458999.940151
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 46.83356 +/- 5.818
Argument of Peri: 101.56823 +/- 2.801
Long of Asc Node: 117.04692 +/- 0.223
Inclination: 12.80901 +/- 0.267
Eccentricity: 0.21010866 +/- 0.0849
Semi-Major Axis: 46.22730297 +/- 2.9318
Time of Perihelion: 2444055.6486 +/- 1193.1
Perihelion: 36.51454651 +/- 4.5556
Aphelion: 55.94005943 +/- 5.2894
Period (y) 314.3084 +/- 29.90
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 11.70368820 +/- 0.0475
Ecliptic Y -39.18584001 +/- 0.1507
Ecliptic Z 1.68129762 +/- 0.0066
Ecliptic XDOT 0.00276348 +/- 0.0001
Ecliptic YDOT 0.00027448 +/- 0.0002
Ecliptic ZDOT -0.00058797 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.93083356 +/- 0.1449
Geocenter to KBO 40.13113974 +/- 0.1582
# Hcoef: 10.04
The following table shows the complete astrometric record for 20KF55. 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 (20KF55) followed by the observatory code and reference code for the source of the astrometry.
2020 05 30.43935 19 14 34.816 -19 54 42.94 26.2r 20KF55 266 C~6c5b 2020 05 30.53044 19 14 34.463 -19 54 43.66 26.2r 20KF55 266 C~6c5b 2020 05 30.61862 19 14 34.120 -19 54 44.33 26.2r 20KF55 266 C~6c5b 2020 06 20.45583 19 13 02.985 -19 57 57.48 26.4r 20KF55 266 C~6c5b 2020 06 20.53000 19 13 02.619 -19 57 58.27 26.4r 20KF55 266 C~6c5b 2020 06 20.62233 19 13 02.165 -19 57 59.22 26.4r 20KF55 266 C~6c5b 2020 06 22.44948 19 12 53.274 -19 58 18.79 26.3r 20KF55 266 C~6c5b 2020 06 22.52092 19 12 52.917 -19 58 19.56 26.3r 20KF55 266 C~6c5b 2020 06 22.59118 19 12 52.567 -19 58 20.31 26.3r 20KF55 266 C~6c5b 2020 06 25.44823 19 12 38.456 -19 58 51.73 26.2r 20KF55 266 C~6c5b 2020 06 25.53213 19 12 38.031 -19 58 52.66 26.2r 20KF55 266 C~6c5b 2020 06 25.61487 19 12 37.612 -19 58 53.56 26.2r 20KF55 266 C~6c5b 2020 08 13.24332 19 08 42.297 -20 08 43.71 25.3r 20KF55 266 C~6c5b 2020 08 13.33331 19 08 41.928 -20 08 44.79 25.3r 20KF55 266 C~6c5b 2020 08 13.42301 19 08 41.561 -20 08 45.84 25.3r 20KF55 266 C~6c5b
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 0.00 0.00 -0.01
2 0.0002 -5.03 0.00 -0.08 -0.01
3 0.0005 -9.91 -0.00 -0.13 -0.00
4 0.0575 -1309.11 -0.00 -29.63 -0.02
5 0.0577 -1314.33 -0.01 -29.77 -0.02
6 0.0580 -1320.80 -0.00 -29.91 -0.02
7 0.0630 -1447.61 -0.01 -33.67 0.04
8 0.0632 -1452.70 -0.01 -33.81 0.04
9 0.0634 -1457.69 -0.01 -33.94 0.03
10 0.0712 -1659.00 0.01 -40.33 -0.00
11 0.0714 -1665.06 0.02 -40.51 -0.01
12 0.0717 -1671.03 0.01 -40.66 -0.01
13 0.2048 -5034.64 0.02 -223.69 -0.01
14 0.2050 -5039.93 -0.00 -224.15 -0.00
15 0.2053 -5045.19 -0.02 -224.58 0.00
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.
20KF55 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