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: 19AU138 # Created Wed May 8 01:18:16 2024 # Orbit generated from Bernstein formalism # Fitting 15 observations of 15 # Arc: 119.77d # First observation: 2018/11/15 # Last observation: 2019/03/15 Preliminary a, adot, b, bdot, g, gdot: 0.000002 0.035808 0.000015 -0.009334 0.032917 0.000000 # Chi-squared of fit: 5.76 DOF: 24 RMS: 0.11 # Min/Max residuals: -0.22 0.21 # Exact a, adot, b, bdot, g, gdot: 1.610156E-05 3.441644E-02 -4.217608E-06 -9.068399E-03 3.185539E-02 1.597284E-03 # Covariance matrix: 3.6427E-13 -3.2360E-12 -2.2220E-16 -4.3086E-13 -1.9385E-13 3.5607E-11 -3.2360E-12 2.6238E-10 3.8179E-12 1.3761E-12 1.0189E-10 5.9080E-09 -2.2220E-16 3.8179E-12 3.5865E-13 -1.2154E-12 1.8857E-12 1.3466E-10 -4.3086E-13 1.3761E-12 -1.2154E-12 8.2485E-12 -4.2010E-12 -5.6640E-10 -1.9385E-13 1.0189E-10 1.8857E-12 -4.2010E-12 4.8196E-11 3.3254E-09 3.5607E-11 5.9080E-09 1.3466E-10 -5.6640E-10 3.3254E-09 2.5969E-07 # lat0 lon0 xBary yBary zBary JD0 -10.621382 146.746029 0.992784 0.011668 0.061646 2458438.043951 # Heliocentric elements and errors Epoch: 2458430.5000 = 2018/11/08 Mean Anomaly: 123.81765 +/- 34.867 Argument of Peri: 90.50560 +/- 34.802 Long of Asc Node: 290.57912 +/- 0.023 Inclination: 18.42160 +/- 0.010 Eccentricity: 0.01467679 +/- 0.0111 Semi-Major Axis: 31.08271644 +/- 0.0331 Time of Perihelion: 2436660.5747 +/- 6130.2 Perihelion: 30.62652207 +/- 0.3454 Aphelion: 31.53891082 +/- 0.3455 Period (y) 173.2952 +/- 0.28 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -25.20461147 +/- 0.0056 Ecliptic Y 17.70688133 +/- 0.0037 Ecliptic Z -5.78625969 +/- 0.0013 Ecliptic XDOT -0.00160704 +/- 0.0000 Ecliptic YDOT -0.00248070 +/- 0.0000 Ecliptic ZDOT -0.00079154 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 31.34145636 +/- 0.0050 Geocenter to KBO 31.39186210 +/- 0.0068 # Hcoef: 7.73
The following table shows the complete astrometric record for 19AU138. 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 (19AU138) followed by the observatory code and reference code for the source of the astrometry.
2018 11 15.54315 09 41 26.99 +02 35 42.0 22.7z 19AU138 T09 C~7n6l 2018 11 15.55808 09 41 27.00 +02 35 41.6 22.5z 19AU138 T09 C~7n6l 2018 11 15.59379 09 41 27.01 +02 35 40.4 22.6z 19AU138 T09 C~7n6l 2018 11 15.61997 09 41 27.05 +02 35 39.8 22.5z 19AU138 T09 C~7n6l 2019 01 06.45953 09 39 39.78 +02 22 35.8 23.3g 19AU138 T09 C~7n6l 2019 01 06.56568 09 39 39.25 +02 22 36.3 23.3g 19AU138 T09 C~7n6l 2019 01 06.58698 09 39 39.15 +02 22 36.7 23.3g 19AU138 T09 C~7n6l 2019 01 06.61913 09 39 38.99 +02 22 36.7 23.5g 19AU138 T09 C~7n6l 2019 03 08.26245 09 33 39.81 +02 44 14.0 22.8r 19AU138 T09 C~7n6l 2019 03 08.29600 09 33 39.63 +02 44 15.0 22.6r 19AU138 T09 C~7n6l 2019 03 08.32553 09 33 39.46 +02 44 16.2 22.6r 19AU138 T09 C~7n6l 2019 03 08.33611 09 33 39.40 +02 44 16.4 22.7r 19AU138 T09 C~7n6l 2019 03 15.28996 09 33 02.21 +02 47 58.4 22.2y 19AU138 T09 C~7n6l 2019 03 15.31422 09 33 02.08 +02 47 59.4 22.3y 19AU138 T09 C~7n6l 2019 03 15.31689 09 33 02.07 +02 47 59.4 22.2y 19AU138 T09 C~7n6l
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 0.20 0.00 -0.06
2 0.0000 0.27 0.11 -0.33 0.01
3 0.0001 0.82 -0.22 -1.41 -0.12
4 0.0002 1.58 -0.09 -1.78 0.21
5 0.1421 -1253.41 0.11 -1276.13 -0.15
6 0.1424 -1261.07 -0.03 -1278.30 -0.14
7 0.1425 -1262.61 -0.06 -1278.42 0.18
8 0.1426 -1264.88 -0.04 -1279.22 0.04
9 0.3086 -6775.19 -0.05 -1843.54 -0.04
10 0.3087 -6778.06 0.12 -1843.49 -0.05
11 0.3088 -6780.87 0.00 -1843.20 0.18
12 0.3088 -6781.78 0.05 -1843.31 0.05
13 0.3278 -7381.79 0.02 -1818.60 -0.14
14 0.3279 -7383.97 -0.11 -1818.30 0.05
15 0.3279 -7384.11 -0.02 -1818.35 -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.
19AU138 quality flag:2 Type: REMOVED CENTAURR CENTAURR axisobj 31.193 31.631 30.839 ecceobj 0.020 0.051 0.029 incobj 18.374 18.342 18.407 qmin 30.574 29.736 29.640 qmax 31.812 33.235 31.789 amean 31.166 31.311 30.790 amin 31.139 30.972 30.635 amax 31.193 31.631 30.897 emean 0.018 0.043 0.030 emin 0.017 0.032 0.029 emax 0.020 0.051 0.032 imean 19.954 19.961 19.988 imin 19.951 19.919 19.969 imax 19.957 20.006 20.012 excite_mean 0.342 0.344 0.343 fracstop 0.000 0.000 0.000 cjmean 2.877 2.876 2.877 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 101.9 132.5 6.7 kozaiamp 1.3 10.7 2.7