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: 20KQ55
# 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:
0.000000 0.015756 0.000004 -0.003432 0.022129 0.000000
# Chi-squared of fit: 0.28 DOF: 30 RMS: 0.02
# Min/Max residuals: -0.04 0.04
# Exact a, adot, b, bdot, g, gdot:
1.494362E-05 2.211005E-02 -2.369678E-06 -3.425087E-03 2.321069E-02 -9.917060E-04
# Covariance matrix:
2.9597E-13 6.5517E-11 -4.1202E-14 -2.2646E-13 1.3070E-11 3.7342E-10
6.5517E-11 1.7171E-07 -1.0831E-10 -2.2380E-10 3.1586E-08 4.6109E-07
-4.1202E-14 -1.0831E-10 2.4378E-13 -8.8336E-13 -1.9918E-11 -2.8927E-10
-2.2646E-13 -2.2380E-10 -8.8336E-13 1.1622E-11 -4.2395E-11 -8.8826E-10
1.3070E-11 3.1586E-08 -1.9918E-11 -4.2395E-11 5.8179E-09 8.6528E-08
3.7342E-10 4.6109E-07 -2.8927E-10 -8.8826E-10 8.6528E-08 1.6385E-06
# lat0 lon0 xBary yBary zBary JD0
2.531867 -73.835652 0.625775 0.034840 -0.790811 2458998.947781
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 308.97000 +/- 35.257
Argument of Peri: 221.85031 +/- 43.427
Long of Asc Node: 121.08000 +/- 0.290
Inclination: 9.09707 +/- 0.163
Eccentricity: 0.07185961 +/- 0.0367
Semi-Major Axis: 45.80546640 +/- 0.9712
Time of Perihelion: 2475041.3281 +/- 11077.8
Perihelion: 42.51390345 +/- 1.9060
Aphelion: 49.09702935 +/- 1.9758
Period (y) 310.0160 +/- 9.86
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 11.60746640 +/- 0.0394
Ecliptic Y -42.28133689 +/- 0.1359
Ecliptic Z 1.90318775 +/- 0.0063
Ecliptic XDOT 0.00248547 +/- 0.0001
Ecliptic YDOT 0.00082471 +/- 0.0001
Ecliptic ZDOT -0.00040902 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.88697812 +/- 0.1313
Geocenter to KBO 43.08359731 +/- 0.1416
# Hcoef: 9.88
The following table shows the complete astrometric record for 20KQ55. 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 (20KQ55) followed by the observatory code and reference code for the source of the astrometry.
2020 05 29.44698 19 08 50.350 -19 56 48.84 26.1r 20KQ55 266 C~6c5c 2020 05 29.53371 19 08 50.030 -19 56 49.35 26.1r 20KQ55 266 C~6c5c 2020 05 29.61905 19 08 49.715 -19 56 49.83 26.1r 20KQ55 266 C~6c5c 2020 05 31.44139 19 08 43.045 -19 57 00.56 26.4r 20KQ55 266 C~6c5c 2020 05 31.52961 19 08 42.710 -19 57 01.10 26.4r 20KQ55 266 C~6c5c 2020 05 31.61814 19 08 42.372 -19 57 01.63 26.4r 20KQ55 266 C~6c5c 2020 06 21.45390 19 07 14.228 -19 59 35.05 26.3r 20KQ55 266 C~6c5c 2020 06 21.53376 19 07 13.852 -19 59 35.73 26.3r 20KQ55 266 C~6c5c 2020 06 21.61261 19 07 13.481 -19 59 36.38 26.3r 20KQ55 266 C~6c5c 2020 06 24.43648 19 07 00.316 -20 00 00.85 26.1r 20KQ55 266 C~6c5c 2020 06 24.52739 19 06 59.881 -20 00 01.65 26.1r 20KQ55 266 C~6c5c 2020 06 24.61708 19 06 59.453 -20 00 02.41 26.1r 20KQ55 266 C~6c5c 2020 08 12.26680 19 03 17.823 -20 08 01.43 26.4r 20KQ55 266 C~6c5c 2020 08 12.34843 19 03 17.510 -20 08 02.24 26.4r 20KQ55 266 C~6c5c 2020 08 12.42950 19 03 17.199 -20 08 03.02 26.4r 20KQ55 266 C~6c5c 2020 08 14.24286 19 03 10.503 -20 08 20.60 26.1r 20KQ55 266 C~6c5c 2020 08 14.33285 19 03 10.168 -20 08 21.48 26.1r 20KQ55 266 C~6c5c 2020 08 14.42134 19 03 09.838 -20 08 22.33 26.1r 20KQ55 266 C~6c5c
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 -4.54 0.02 0.03 0.01
3 0.0005 -9.01 0.02 0.07 0.01
4 0.0055 -103.66 -0.03 0.49 0.00
5 0.0057 -108.42 -0.02 0.51 0.00
6 0.0059 -113.21 -0.03 0.54 -0.00
7 0.0630 -1365.29 0.02 -7.04 -0.03
8 0.0632 -1370.63 0.02 -7.10 -0.03
9 0.0634 -1375.90 0.02 -7.14 -0.03
10 0.0712 -1563.07 -0.01 -10.06 0.02
11 0.0714 -1569.25 -0.01 -10.15 0.02
12 0.0716 -1575.33 -0.01 -10.21 0.03
13 0.2048 -4732.80 -0.03 -135.48 -0.03
14 0.2051 -4737.27 -0.01 -135.80 -0.04
15 0.2053 -4741.71 -0.01 -136.10 -0.03
16 0.2103 -4837.42 0.02 -143.25 0.04
17 0.2105 -4842.21 0.02 -143.61 0.04
18 0.2107 -4846.92 0.01 -143.95 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.
20KQ55 quality flag:1 Type: CLASSICAL CLASSICAL SCATNEAR axisobj 45.232 50.512 42.438 ecceobj 0.069 0.160 0.180 incobj 9.122 8.630 9.664 qmin 41.607 41.867 33.780 qmax 49.502 60.191 51.717 amean 45.457 50.837 42.631 amin 45.092 50.389 42.217 amax 45.832 51.334 43.079 emean 0.068 0.162 0.156 emin 0.056 0.152 0.116 emax 0.080 0.173 0.205 imean 7.663 7.115 4.695 imin 7.258 6.868 1.576 imax 8.071 7.390 8.705 excite_mean 0.150 0.204 0.178 fracstop 1.000 1.000 1.000 cjmean 3.092 3.137 3.047 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 179.4 181.2 179.7 kozaiamp 180.0 180.0 180.0