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: 20KW11
# Created Sun Nov 24 02:11:02 2024
# Orbit generated from Bernstein formalism
# Fitting 22 observations of 22
# Arc: 159.78d
# First observation: 2020/05/29
# Last observation: 2020/11/05
Preliminary a, adot, b, bdot, g, gdot:
-0.000017 0.021504 -0.000014 -0.001060 0.021454 0.000000
# Chi-squared of fit: 3.10 DOF: 38 RMS: 0.07
# Min/Max residuals: -0.19 0.16
# Exact a, adot, b, bdot, g, gdot:
1.364460E-05 1.791342E-02 -9.133681E-07 -1.244236E-03 2.087303E-02 1.920094E-03
# Covariance matrix:
2.5431E-13 -7.6190E-13 2.1203E-15 -4.1093E-14 2.4677E-13 4.3499E-11
-7.6190E-13 1.9284E-10 -8.1638E-13 1.2400E-11 7.9655E-12 -6.5629E-09
2.1203E-15 -8.1638E-13 2.0596E-13 -6.1149E-13 -2.7977E-14 2.9000E-11
-4.1093E-14 1.2400E-11 -6.1149E-13 3.1381E-12 3.8105E-13 -4.4677E-10
2.4677E-13 7.9655E-12 -2.7977E-14 3.8105E-13 1.5947E-12 -9.4181E-11
4.3499E-11 -6.5629E-09 2.9000E-11 -4.4677E-10 -9.4181E-11 2.5181E-07
# lat0 lon0 xBary yBary zBary JD0
2.813304 -73.344993 0.632531 0.038460 -0.785249 2458998.947781
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 121.68691 +/- 8.541
Argument of Peri: 12.57177 +/- 8.290
Long of Asc Node: 141.10037 +/- 0.040
Inclination: 4.79477 +/- 0.005
Eccentricity: 0.11583020 +/- 0.0194
Semi-Major Axis: 45.53130733 +/- 0.1767
Time of Perihelion: 2421058.5669 +/- 2653.2
Perihelion: 40.25740708 +/- 0.8984
Aphelion: 50.80520758 +/- 0.9064
Period (y) 307.2369 +/- 1.79
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 13.33947041 +/- 0.0008
Ecliptic Y -46.78485607 +/- 0.0028
Ecliptic Z 2.35146717 +/- 0.0001
Ecliptic XDOT 0.00233358 +/- 0.0000
Ecliptic YDOT 0.00042831 +/- 0.0001
Ecliptic ZDOT -0.00015088 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 48.70619700 +/- 0.0027
Geocenter to KBO 47.90870376 +/- 0.0029
# Hcoef: 8.95
The following table shows the complete astrometric record for 20KW11. 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 (20KW11) followed by the observatory code and reference code for the source of the astrometry.
2020 05 29.44698 19 10 45.888 -19 36 32.21 25.6r 20KW11 266 C~6VL7 2020 05 29.53371 19 10 45.596 -19 36 32.57 25.6r 20KW11 266 C~5Zeh 2020 05 29.61905 19 10 45.308 -19 36 32.92 25.6r 20KW11 266 C~5Zeh 2020 05 31.44139 19 10 39.217 -19 36 40.67 25.8r 20KW11 266 C~5Zeh 2020 05 31.52961 19 10 38.910 -19 36 41.07 25.8r 20KW11 266 C~5Zeh 2020 05 31.61814 19 10 38.602 -19 36 41.45 25.8r 20KW11 266 C~6VL7 2020 08 12.26680 19 05 41.422 -19 45 41.52 25.9r 20KW11 266 C~6VL7 2020 08 12.34843 19 05 41.132 -19 45 42.20 25.9r 20KW11 266 C~6VL7 2020 08 12.42950 19 05 40.844 -19 45 42.87 25.9r 20KW11 266 C~5Zeh 2020 08 14.24286 19 05 34.636 -19 45 57.90 25.8r 20KW11 266 C~5Zeh 2020 08 14.33285 19 05 34.325 -19 45 58.65 25.8r 20KW11 266 C~5Zeh 2020 08 14.42134 19 05 34.020 -19 45 59.37 25.8r 20KW11 266 C~6VL7 2020 10 18.323666 19 04 28.283 -19 51 51.34 20KW11 250 S~5zHB 2020 10 18.329985 19 04 28.291 -19 51 51.42 20KW11 250 S~5zHB 2020 10 18.336305 19 04 28.295 -19 51 51.48 20KW11 250 S~5zHB 2020 10 18.342624 19 04 28.297 -19 51 51.50 20KW11 250 S~5zHB 2020 10 18.348944 19 04 28.302 -19 51 51.45 20KW11 250 S~5zHB 2020 11 05.201572 19 05 12.096 -19 51 52.67 20KW11 250 S~5zHB 2020 11 05.207891 19 05 12.111 -19 51 52.63 20KW11 250 S~5zHB 2020 11 05.214210 19 05 12.124 -19 51 52.57 20KW11 250 S~5zHB 2020 11 05.220530 19 05 12.138 -19 51 52.50 20KW11 250 S~5zHB 2020 11 05.226849 19 05 12.156 -19 51 52.45 20KW11 250 S~5zHB
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 -0.02 0.00 -0.01
2 0.0002 -4.14 -0.01 0.14 0.00
3 0.0005 -8.22 -0.02 0.29 -0.00
4 0.0055 -94.59 0.02 3.00 0.00
5 0.0057 -98.95 0.01 3.13 -0.00
6 0.0059 -103.31 0.01 3.28 0.00
7 0.2048 -4335.46 -0.01 -41.00 0.01
8 0.2051 -4339.61 -0.01 -41.21 0.02
9 0.2053 -4343.72 -0.01 -41.42 0.01
10 0.2103 -4432.54 0.01 -46.40 0.00
11 0.2105 -4436.99 0.01 -46.65 0.00
12 0.2107 -4441.35 0.01 -46.88 0.00
13 0.3884 -5403.31 0.16 -292.21 0.02
14 0.3885 -5403.21 0.11 -292.30 -0.05
15 0.3885 -5403.16 0.01 -292.37 -0.09
16 0.3885 -5403.13 -0.11 -292.39 -0.08
17 0.3885 -5403.05 -0.19 -292.35 -0.02
18 0.4374 -4788.91 0.15 -362.98 -0.07
19 0.4374 -4788.69 0.08 -362.97 -0.03
20 0.4374 -4788.50 -0.01 -362.93 0.03
21 0.4374 -4788.30 -0.09 -362.88 0.10
22 0.4375 -4788.04 -0.12 -362.86 0.14
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.
20KW11 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.997 45.715 44.684 ecceobj 0.120 0.171 0.094 incobj 4.800 4.808 4.794 qmin 38.936 37.243 39.728 qmax 51.924 55.148 50.320 amean 45.242 45.976 44.911 amin 44.857 45.569 44.552 amax 45.673 46.436 45.305 emean 0.122 0.171 0.096 emin 0.107 0.157 0.082 emax 0.137 0.188 0.111 imean 3.821 3.704 3.897 imin 3.208 2.812 3.387 imax 4.533 4.620 4.523 excite_mean 0.139 0.183 0.118 fracstop 1.000 1.000 1.000 cjmean 3.093 3.084 3.096 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 178.8 180.2 175.5 kozaiamp 180.0 180.0 180.0