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: 20KB55
# Created Sun Apr 27 01:11:20 2025
# Orbit generated from Bernstein formalism
# Fitting 18 observations of 18
# Arc: 76.97d
# First observation: 2020/05/29
# Last observation: 2020/08/14
Preliminary a, adot, b, bdot, g, gdot:
0.000001 0.014570 0.000003 -0.006783 0.021444 0.000000
# Chi-squared of fit: 0.25 DOF: 30 RMS: 0.02
# Min/Max residuals: -0.05 0.05
# Exact a, adot, b, bdot, g, gdot:
1.431521E-05 2.030397E-02 -4.764082E-06 -6.775776E-03 2.241878E-02 -7.207193E-05
# Covariance matrix:
3.0412E-13 7.8829E-11 -4.3787E-14 -6.2172E-13 1.5617E-11 4.4414E-10
7.8829E-11 1.8647E-07 -1.1098E-10 -7.7170E-10 3.4526E-08 5.6972E-07
-4.3787E-14 -1.1098E-10 2.4163E-13 -5.7538E-13 -2.0518E-11 -3.3118E-10
-6.2172E-13 -7.7170E-10 -5.7538E-13 1.5216E-11 -1.4545E-10 -2.9747E-09
1.5617E-11 3.4526E-08 -2.0518E-11 -1.4545E-10 6.4003E-09 1.0725E-07
4.4414E-10 5.6972E-07 -3.3118E-10 -2.9747E-09 1.0725E-07 2.1646E-06
# lat0 lon0 xBary yBary zBary JD0
2.586566 -73.387009 0.631955 0.035373 -0.785859 2458998.947781
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 344.16325 +/- 67.995
Argument of Peri: 189.72839 +/- 76.644
Long of Asc Node: 113.42522 +/- 0.162
Inclination: 18.53414 +/- 0.374
Eccentricity: 0.05765696 +/- 0.0135
Semi-Major Axis: 48.05690803 +/- 1.2888
Time of Perihelion: 2464343.4820 +/- 22982.0
Perihelion: 45.28609277 +/- 1.3758
Aphelion: 50.82772328 +/- 1.5086
Period (y) 333.1516 +/- 13.40
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 12.36493930 +/- 0.0455
Ecliptic Y -43.64134616 +/- 0.1524
Ecliptic Z 2.01284783 +/- 0.0072
Ecliptic XDOT 0.00239236 +/- 0.0001
Ecliptic YDOT 0.00068512 +/- 0.0002
Ecliptic ZDOT -0.00082727 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.40385859 +/- 0.1470
Geocenter to KBO 44.60547009 +/- 0.1592
# Hcoef: 9.70
The following table shows the complete astrometric record for 20KB55. 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 (20KB55) followed by the observatory code and reference code for the source of the astrometry.
2020 05 29.44698 19 10 42.259 -19 50 20.75 26.0r 20KB55 266 C~6c5a 2020 05 29.53511 19 10 41.946 -19 50 21.43 26.0r 20KB55 266 C~6c5a 2020 05 29.61905 19 10 41.647 -19 50 22.06 26.0r 20KB55 266 C~6c5a 2020 05 31.44139 19 10 35.215 -19 50 36.16 26.2r 20KB55 266 C~6c5a 2020 05 31.52961 19 10 34.892 -19 50 36.87 26.2r 20KB55 266 C~6c5b 2020 05 31.61814 19 10 34.566 -19 50 37.56 26.2r 20KB55 266 C~6c5b 2020 06 21.45390 19 09 09.394 -19 53 49.80 26.2r 20KB55 266 C~6c5b 2020 06 21.53376 19 09 09.030 -19 53 50.63 26.2r 20KB55 266 C~6c5b 2020 06 21.61261 19 09 08.671 -19 53 51.43 26.2r 20KB55 266 C~6c5b 2020 06 24.43648 19 08 55.925 -19 54 21.23 26.2r 20KB55 266 C~6c5b 2020 06 24.52599 19 08 55.511 -19 54 22.18 26.2r 20KB55 266 C~6c5b 2020 06 24.61708 19 08 55.090 -19 54 23.13 26.2r 20KB55 266 C~6c5b 2020 08 12.26680 19 05 19.608 -20 03 53.63 26.4r 20KB55 266 C~6c5b 2020 08 12.34843 19 05 19.301 -20 03 54.59 26.4r 20KB55 266 C~6c5b 2020 08 12.42950 19 05 18.997 -20 03 55.53 26.4r 20KB55 266 C~6c5b 2020 08 14.24286 19 05 12.435 -20 04 16.60 26.2r 20KB55 266 C~6c5b 2020 08 14.33285 19 05 12.107 -20 04 17.65 26.2r 20KB55 266 C~6c5b 2020 08 14.42134 19 05 11.784 -20 04 18.66 26.2r 20KB55 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 -0.00
2 0.0002 -4.47 0.00 -0.14 -0.00
3 0.0005 -8.73 0.00 -0.26 -0.00
4 0.0055 -100.52 -0.01 -3.29 0.00
5 0.0057 -105.13 -0.00 -3.44 -0.00
6 0.0059 -109.78 -0.01 -3.57 0.00
7 0.0630 -1325.69 0.04 -50.65 -0.00
8 0.0632 -1330.88 0.05 -50.86 -0.00
9 0.0634 -1336.01 0.04 -51.06 -0.00
10 0.0712 -1518.05 -0.05 -59.35 0.00
11 0.0714 -1523.96 -0.04 -59.61 0.01
12 0.0716 -1529.97 -0.04 -59.85 0.01
13 0.2048 -4613.88 0.02 -275.38 0.00
14 0.2051 -4618.29 0.02 -275.84 -0.00
15 0.2053 -4622.65 0.03 -276.29 -0.01
16 0.2103 -4716.94 -0.02 -286.80 0.00
17 0.2105 -4721.65 -0.02 -287.32 -0.00
18 0.2107 -4726.29 -0.03 -287.81 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.
20KB55 quality flag:1 Type: SCATNEAR SCATNEAR SCATEXTD axisobj 47.444 54.869 44.255 ecceobj 0.049 0.234 0.160 incobj 18.602 17.490 19.829 qmin 42.801 41.146 36.805 qmax 53.304 69.961 52.397 amean 47.798 55.279 44.427 amin 47.310 54.705 44.045 amax 48.314 55.939 44.845 emean 0.056 0.236 0.152 emin 0.023 0.222 0.137 emax 0.105 0.253 0.170 imean 16.916 15.951 18.351 imin 16.517 15.472 17.794 imax 17.223 16.322 18.843 excite_mean 0.297 0.362 0.350 fracstop 1.000 1.000 1.000 cjmean 3.037 3.077 2.957 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 174.4 193.0 184.0 kozaiamp 180.0 180.0 179.9