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: 20KC55
# Created Mon Apr 28 01:11:21 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 0.016748 0.000004 0.000073 0.022241 0.000000
# Chi-squared of fit: 0.62 DOF: 30 RMS: 0.03
# Min/Max residuals: -0.05 0.05
# Exact a, adot, b, bdot, g, gdot:
1.496140E-05 2.156529E-02 -6.518961E-08 7.296681E-05 2.304421E-02 -2.312148E-03
# Covariance matrix:
2.8809E-13 4.8541E-11 -3.9083E-14 2.1781E-14 1.0029E-11 3.4919E-10
4.8541E-11 1.3595E-07 -1.0021E-10 2.7303E-11 2.5220E-08 4.1878E-07
-3.9083E-14 -1.0021E-10 2.4935E-13 -1.0434E-12 -1.8614E-11 -3.1400E-10
2.1781E-14 2.7303E-11 -1.0434E-12 1.1122E-11 5.1695E-12 1.0867E-10
1.0029E-11 2.5220E-08 -1.8614E-11 5.1695E-12 4.6862E-09 7.9423E-08
3.4919E-10 4.1878E-07 -3.1400E-10 1.0867E-10 7.9423E-08 1.6982E-06
# lat0 lon0 xBary yBary zBary JD0
2.743547 -73.061234 0.636417 0.037353 -0.782157 2458998.947781
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 276.14925 +/- 10.952
Argument of Peri: 182.96175 +/- 9.320
Long of Asc Node: 200.84581 +/- 0.190
Inclination: 2.70344 +/- 0.001
Eccentricity: 0.12088655 +/- 0.0607
Semi-Major Axis: 44.12009772 +/- 0.5599
Time of Perihelion: 2483922.5251 +/- 3221.8
Perihelion: 38.78657153 +/- 2.7248
Aphelion: 49.45362390 +/- 2.7524
Period (y) 293.0643 +/- 5.58
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 12.25355617 +/- 0.0375
Ecliptic Y -42.40598706 +/- 0.1232
Ecliptic Z 2.07718883 +/- 0.0062
Ecliptic XDOT 0.00237904 +/- 0.0001
Ecliptic YDOT 0.00101291 +/- 0.0001
Ecliptic ZDOT -0.00000472 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.18972834 +/- 0.1187
Geocenter to KBO 43.39484120 +/- 0.1289
# Hcoef: 9.87
The following table shows the complete astrometric record for 20KC55. 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 (20KC55) followed by the observatory code and reference code for the source of the astrometry.
2020 05 29.44698 19 11 59.735 -19 38 36.94 26.3r 20KC55 266 C~6c5b 2020 05 29.53371 19 11 59.420 -19 38 37.27 26.3r 20KC55 266 C~6c5b 2020 05 29.61905 19 11 59.109 -19 38 37.58 26.3r 20KC55 266 C~6c5b 2020 05 31.44139 19 11 52.535 -19 38 44.72 26.1r 20KC55 266 C~6c5b 2020 05 31.52961 19 11 52.204 -19 38 45.09 26.1r 20KC55 266 C~6c5b 2020 05 31.61814 19 11 51.871 -19 38 45.44 26.1r 20KC55 266 C~6c5b 2020 06 21.45390 19 10 24.571 -19 40 39.20 26.1r 20KC55 266 C~6c5b 2020 06 21.53376 19 10 24.197 -19 40 39.73 26.1r 20KC55 266 C~6c5b 2020 06 21.61261 19 10 23.829 -19 40 40.25 26.1r 20KC55 266 C~6c5b 2020 06 24.43648 19 10 10.759 -19 40 59.58 26.3r 20KC55 266 C~6c5b 2020 06 24.51759 19 10 10.373 -19 41 00.15 26.3r 20KC55 266 C~6c5b 2020 06 24.59884 19 10 09.988 -19 41 00.70 26.3r 20KC55 266 C~6c5b 2020 08 12.26680 19 06 28.132 -19 47 41.20 26.6r 20KC55 266 C~6c5b 2020 08 12.34843 19 06 27.815 -19 47 41.89 26.6r 20KC55 266 C~6c5b 2020 08 12.42950 19 06 27.500 -19 47 42.55 26.6r 20KC55 266 C~6c5b 2020 08 14.24286 19 06 20.726 -19 47 57.58 26.1r 20KC55 266 C~6c5b 2020 08 14.33285 19 06 20.387 -19 47 58.33 26.1r 20KC55 266 C~6c5b 2020 08 14.42134 19 06 20.054 -19 47 59.05 26.1r 20KC55 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 -0.03 0.00 0.02
2 0.0002 -4.46 -0.03 0.22 0.03
3 0.0005 -8.86 -0.03 0.45 0.03
4 0.0055 -101.90 0.04 4.79 -0.04
5 0.0057 -106.58 0.04 4.99 -0.04
6 0.0059 -111.30 0.04 5.22 -0.04
7 0.0630 -1349.14 -0.04 42.51 -0.03
8 0.0632 -1354.45 -0.05 42.63 -0.02
9 0.0634 -1359.67 -0.05 42.74 -0.03
10 0.0712 -1545.26 0.04 45.80 0.04
11 0.0714 -1550.74 0.03 45.89 0.04
12 0.0716 -1556.21 0.04 46.00 0.05
13 0.2048 -4714.66 0.02 16.91 0.02
14 0.2051 -4719.18 0.02 16.74 0.01
15 0.2053 -4723.68 0.01 16.59 0.02
16 0.2103 -4820.43 -0.02 12.64 -0.02
17 0.2105 -4825.27 -0.02 12.45 -0.02
18 0.2107 -4830.02 -0.02 12.27 -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.
20KC55 quality flag:1 Type: SCATNEAR CLASSICAL SCATNEAR axisobj 43.618 47.109 41.778 ecceobj 0.125 0.080 0.197 incobj 2.710 2.709 2.711 qmin 37.032 42.761 33.330 qmax 50.931 52.208 50.859 amean 43.726 47.362 41.587 amin 43.252 46.978 40.969 amax 44.213 47.798 42.299 emean 0.137 0.079 0.171 emin 0.109 0.065 0.139 emax 0.152 0.093 0.202 imean 4.402 3.499 2.812 imin 3.203 3.201 0.137 imax 5.254 3.812 4.854 excite_mean 0.157 0.100 0.180 fracstop 1.000 1.000 1.000 cjmean 3.068 3.131 3.037 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 178.2 180.0 172.4 kozaiamp 180.0 180.0 180.0