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: 20KW53
# Created Mon Apr 28 01:11:21 2025
# Orbit generated from Bernstein formalism
# Fitting 21 observations of 21
# Arc: 76.98d
# First observation: 2020/05/28
# Last observation: 2020/08/13
Preliminary a, adot, b, bdot, g, gdot:
0.000003 0.014803 0.000003 -0.001577 0.021065 0.000000
# Chi-squared of fit: 0.46 DOF: 36 RMS: 0.03
# Min/Max residuals: -0.06 0.04
# Exact a, adot, b, bdot, g, gdot:
1.402500E-05 1.948523E-02 -1.218275E-06 -1.587482E-03 2.184783E-02 3.121298E-04
# Covariance matrix:
2.0175E-13 2.3436E-11 -1.5302E-14 -1.4091E-13 5.1661E-12 2.4383E-10
2.3436E-11 1.4281E-07 -8.6820E-11 -5.4013E-10 2.6811E-08 5.3026E-07
-1.5302E-14 -8.6820E-11 1.8064E-13 -6.1539E-13 -1.6305E-11 -3.2346E-10
-1.4091E-13 -5.4013E-10 -6.1539E-13 1.7387E-11 -1.0183E-10 -2.1128E-09
5.1661E-12 2.6811E-08 -1.6305E-11 -1.0183E-10 5.0389E-09 1.0085E-07
2.4383E-10 5.3026E-07 -3.2346E-10 -2.1128E-09 1.0085E-07 2.3060E-06
# lat0 lon0 xBary yBary zBary JD0
2.334832 -72.528281 0.656623 0.031084 -0.765497 2458997.947541
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 178.02227 +/- 87.155
Argument of Peri: 335.27322 +/- 86.513
Long of Asc Node: 133.07433 +/- 0.461
Inclination: 5.15081 +/- 0.084
Eccentricity: 0.04886347 +/- 0.0271
Semi-Major Axis: 44.38192474 +/- 1.1044
Time of Perihelion: 2513581.7926 +/- 26069.5
Perihelion: 42.21326996 +/- 1.5975
Aphelion: 46.55057953 +/- 1.6705
Period (y) 295.6769 +/- 11.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 13.34000960 +/- 0.0446
Ecliptic Y -44.55801732 +/- 0.1417
Ecliptic Z 1.86469584 +/- 0.0061
Ecliptic XDOT 0.00235142 +/- 0.0001
Ecliptic YDOT 0.00069163 +/- 0.0002
Ecliptic ZDOT -0.00019741 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 46.54943452 +/- 0.1363
Geocenter to KBO 45.77113327 +/- 0.1487
# Hcoef: 9.47
The following table shows the complete astrometric record for 20KW53. 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 (20KW53) followed by the observatory code and reference code for the source of the astrometry.
2020 05 28.44674 19 14 27.532 -19 58 57.04 26.2r 20KW53 266 C~6c5Y 2020 05 28.50129 19 14 27.348 -19 58 57.32 26.2r 20KW53 266 C~6c5Y 2020 05 28.55756 19 14 27.156 -19 58 57.59 26.2r 20KW53 266 C~6c5Y 2020 05 30.43935 19 14 20.816 -19 59 07.03 26.0r 20KW53 266 C~6c5Y 2020 05 30.53044 19 14 20.497 -19 59 07.51 26.0r 20KW53 266 C~6c5Y 2020 05 30.61862 19 14 20.187 -19 59 07.96 26.0r 20KW53 266 C~6c5Y 2020 06 01.43269 19 14 13.865 -19 59 17.45 26.3r 20KW53 266 C~6c5Y 2020 06 01.47325 19 14 13.718 -19 59 17.68 26.3r 20KW53 266 C~6c5Y 2020 06 01.60571 19 14 13.238 -19 59 18.39 26.3r 20KW53 266 C~6c5Y 2020 06 20.45583 19 12 58.052 -20 01 22.59 26.2r 20KW53 266 C~6c5Y 2020 06 20.52860 19 12 57.729 -20 01 23.14 26.2r 20KW53 266 C~6c5Y 2020 06 20.62233 19 12 57.315 -20 01 23.84 26.2r 20KW53 266 C~6c5Y 2020 06 22.44948 19 12 49.331 -20 01 37.94 25.9r 20KW53 266 C~6c5Y 2020 06 22.52092 19 12 49.011 -20 01 38.50 25.9r 20KW53 266 C~6c5Y 2020 06 22.59118 19 12 48.696 -20 01 39.03 25.9r 20KW53 266 C~6c5Y 2020 06 25.44823 19 12 36.019 -20 02 01.80 26.1r 20KW53 266 C~6c5Y 2020 06 25.53213 19 12 35.637 -20 02 02.47 26.1r 20KW53 266 C~6c5Y 2020 06 25.61487 19 12 35.262 -20 02 03.12 26.1r 20KW53 266 C~6c5Y 2020 08 13.24332 19 09 03.673 -20 09 18.80 25.8r 20KW53 266 C~6c5Y 2020 08 13.33331 19 09 03.341 -20 09 19.59 25.8r 20KW53 266 C~6c5Y 2020 08 13.42301 19 09 03.009 -20 09 20.37 25.8r 20KW53 266 C~6c5Y
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 0.0001 -2.61 0.02 0.05 0.01
3 0.0003 -5.33 0.01 0.13 0.01
4 0.0055 -95.18 0.01 2.11 -0.05
5 0.0057 -99.70 0.02 2.21 -0.06
6 0.0059 -104.09 0.02 2.32 -0.06
7 0.0109 -193.69 -0.03 4.21 0.02
8 0.0110 -195.78 -0.04 4.24 0.02
9 0.0114 -202.58 -0.04 4.39 0.02
10 0.0630 -1269.54 -0.03 14.49 0.01
11 0.0632 -1274.12 -0.03 14.51 0.02
12 0.0635 -1280.00 -0.03 14.55 0.01
13 0.0685 -1393.40 0.03 14.60 0.04
14 0.0686 -1397.95 0.03 14.60 0.03
15 0.0688 -1402.42 0.03 14.63 0.04
16 0.0767 -1582.53 0.00 14.28 -0.02
17 0.0769 -1587.95 0.00 14.28 -0.01
18 0.0771 -1593.28 0.01 14.29 -0.01
19 0.2103 -4605.50 -0.00 -55.47 -0.01
20 0.2105 -4610.24 0.01 -55.69 -0.01
21 0.2107 -4614.98 -0.01 -55.91 -0.01
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.
20KW53 quality flag:1 Type: CLASSICAL CLASSICAL SCATNEAR axisobj 43.874 50.111 41.442 ecceobj 0.059 0.195 0.202 incobj 5.159 4.912 5.419 qmin 40.457 39.807 32.854 qmax 47.930 61.546 51.795 amean 44.088 50.415 41.360 amin 43.737 49.951 40.219 amax 44.450 50.943 42.547 emean 0.063 0.198 0.180 emin 0.048 0.187 0.142 emax 0.079 0.208 0.217 imean 4.121 3.682 3.363 imin 3.502 3.444 1.602 imax 4.802 3.930 5.387 excite_mean 0.096 0.208 0.189 fracstop 1.000 1.000 1.000 cjmean 3.092 3.129 3.030 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 182.7 175.2 181.8 kozaiamp 180.0 180.0 180.0