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: 20KW55 # Created Fri Jan 24 02:11:45 2025 # Orbit generated from Bernstein formalism # Fitting 12 observations of 12 # Arc: 23.15d # First observation: 2020/05/30 # Last observation: 2020/06/22 Preliminary a, adot, b, bdot, g, gdot: 0.000000 0.029370 -0.000000 -0.000781 0.026117 0.000000 # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # WARNING Fitting with energy constraint # Chi-squared of fit: 0.03 DOF: 19 RMS: 0.01 # Min/Max residuals: -0.02 0.02 # Exact a, adot, b, bdot, g, gdot: 1.603028E-05 2.561162E-02 -4.613066E-07 -7.164839E-04 2.533279E-02 2.199585E-03 # Covariance matrix: 1.9624E-12 3.0658E-09 -9.9389E-14 -5.2329E-11 6.1710E-10 4.2382E-08 3.0658E-09 5.9130E-06 -1.8688E-10 -1.0060E-07 1.1735E-06 7.0046E-05 -9.9389E-14 -1.8688E-10 2.6998E-13 -1.3741E-12 -3.7264E-11 -2.3495E-09 -5.2329E-11 -1.0060E-07 -1.3741E-12 1.8575E-09 -1.9971E-08 -1.1971E-06 6.1710E-10 1.1735E-06 -3.7264E-11 -1.9971E-08 2.3347E-07 1.4349E-05 4.2382E-08 7.0046E-05 -2.3495E-09 -1.1971E-06 1.4349E-05 1.1769E-03 # lat0 lon0 xBary yBary zBary JD0 1.829308 -72.269288 0.634202 0.024927 -0.784498 2458999.940151 # Heliocentric elements and errors Epoch: 2458990.5000 = 2020/05/21 Mean Anomaly: 46.12542 +/- 314.205 Argument of Peri: 76.94707 +/- 84.038 Long of Asc Node: 155.64514 +/- 2.464 Inclination: 2.38213 +/- 0.091 Eccentricity: 0.09019778 +/- 1.2341 Semi-Major Axis: 42.74397669 +/- 15.6799 Time of Perihelion: 2445912.2800 +/- 88797.3 Perihelion: 38.88856490 +/- 54.6455 Aphelion: 46.59938848 +/- 55.4512 Period (y) 279.4606 +/- 153.77 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 11.65618983 +/- 0.2291 Ecliptic Y -38.52785744 +/- 0.7168 Ecliptic Z 1.26015947 +/- 0.0240 Ecliptic XDOT 0.00271773 +/- 0.0013 Ecliptic YDOT 0.00061787 +/- 0.0035 Ecliptic ZDOT -0.00007004 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 40.27220583 +/- 0.6889 Geocenter to KBO 39.47453495 +/- 0.7529 # Hcoef: 9.27
The following table shows the complete astrometric record for 20KW55. 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 (20KW55) followed by the observatory code and reference code for the source of the astrometry.
2020 05 30.43935 19 15 49.754 -20 27 02.48 25.2r 20KW55 266 C~6c5c 2020 05 30.53044 19 15 49.396 -20 27 03.01 25.2r 20KW55 266 C~6c5c 2020 05 30.61862 19 15 49.047 -20 27 03.51 25.2r 20KW55 266 C~6c5c 2020 06 01.43269 19 15 41.957 -20 27 14.07 25.5r 20KW55 266 C~6c5c 2020 06 01.47325 19 15 41.792 -20 27 14.32 25.5r 20KW55 266 C~6c5c 2020 06 01.60571 19 15 41.252 -20 27 15.12 25.5r 20KW55 266 C~6c5c 2020 06 20.45583 19 14 16.324 -20 29 31.86 25.1r 20KW55 266 C~6c5c 2020 06 20.52860 19 14 15.958 -20 29 32.47 25.1r 20KW55 266 C~6c5c 2020 06 20.62233 19 14 15.488 -20 29 33.23 25.1r 20KW55 266 C~6c5c 2020 06 22.44948 19 14 06.431 -20 29 48.71 25.2r 20KW55 266 C~6c5c 2020 06 22.52092 19 14 06.067 -20 29 49.32 25.2r 20KW55 266 C~6c5c 2020 06 22.59118 19 14 05.710 -20 29 49.91 25.2r 20KW55 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 -0.01 0.00 0.00 2 0.0002 -5.06 -0.00 0.12 0.00 3 0.0005 -9.99 -0.02 0.26 -0.00 4 0.0055 -110.16 0.02 2.66 -0.00 5 0.0056 -112.49 0.01 2.72 0.00 6 0.0059 -120.12 0.01 2.90 -0.01 7 0.0575 -1321.28 -0.01 20.05 0.00 8 0.0577 -1326.46 -0.01 20.10 0.00 9 0.0580 -1333.11 -0.01 20.19 0.00 10 0.0630 -1461.30 0.01 20.97 -0.00 11 0.0632 -1466.45 0.01 21.01 -0.00 12 0.0634 -1471.50 0.01 21.06 -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.
20KW55 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0