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: 19RO4 # Created Sat Mar 30 01:19:17 2024 # Orbit generated from Bernstein formalism # Fitting 13 observations of 14 # Arc: 1.85y # First observation: 2019/09/04 # Last observation: 2021/07/09 Preliminary a, adot, b, bdot, g, gdot: -0.000001 0.022411 -0.000000 -0.008053 0.024489 0.000000 # Chi-squared of fit: 7.97 DOF: 20 RMS: 0.14 # Min/Max residuals: -0.27 0.34 # Exact a, adot, b, bdot, g, gdot: 1.276417E-05 2.258927E-02 -5.774169E-06 -8.124877E-03 2.477999E-02 4.112850E-03 # Covariance matrix: 2.6714E-13 -2.5040E-14 4.2375E-15 -8.4819E-14 5.2341E-13 5.9254E-12 -2.5040E-14 2.5335E-12 5.1040E-14 -8.0199E-13 2.0288E-12 5.6065E-11 4.2375E-15 5.1040E-14 1.8760E-13 -1.3782E-13 5.6878E-14 1.3287E-12 -8.4819E-14 -8.0199E-13 -1.3782E-13 5.0693E-13 -9.9846E-13 -2.1749E-11 5.2341E-13 2.0288E-12 5.6878E-14 -9.9846E-13 4.2998E-12 6.9776E-11 5.9254E-12 5.6065E-11 1.3287E-12 -2.1749E-11 6.9776E-11 1.5202E-09 # lat0 lon0 xBary yBary zBary JD0 -1.311444 -39.948936 -0.366536 -0.021423 -0.934032 2458730.694311 # Heliocentric elements and errors Epoch: 2458730.5000 = 2019/09/04 Mean Anomaly: 74.78912 +/- 0.159 Argument of Peri: 88.38564 +/- 0.055 Long of Asc Node: 136.99264 +/- 0.000 Inclination: 19.80472 +/- 0.001 Eccentricity: 0.17933842 +/- 0.0016 Semi-Major Axis: 41.95002875 +/- 0.0190 Time of Perihelion: 2438113.1535 +/- 41.6 Perihelion: 34.42677701 +/- 0.0677 Aphelion: 49.47328049 +/- 0.0696 Period (y) 271.7106 +/- 0.18 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 31.88354673 +/- 0.0026 Ecliptic Y -26.23154817 +/- 0.0022 Ecliptic Z -0.92379719 +/- 0.0001 Ecliptic XDOT 0.00194356 +/- 0.0000 Ecliptic YDOT 0.00163545 +/- 0.0000 Ecliptic ZDOT -0.00090808 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.29779743 +/- 0.0024 Geocenter to KBO 40.35514518 +/- 0.0034 # Hcoef: 7.02
The following table shows the complete astrometric record for 19RO4. 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 (19RO4) followed by the observatory code and reference code for the source of the astrometry.
2019 09 04.193510 21 31 33.430 -16 02 32.09 22.7G 19RO4 G37 C~3JLq 2019 09 04.265730 21 31 33.074 -16 02 34.14 19RO4 G37 C~3JLq 2019 09 04.321210 21 31 32.835 -16 02 35.58 19RO4 G37 C~3JLq 2019 09 07.216320 21 31 20.280 -16 03 47.61 22.8G 19RO4 G37 C~3JLq 2019 09 07.260390 21 31 20.107 -16 03 48.78 19RO4 G37 C~3JLq 2019 09 07.300310 21 31 19.935 -16 03 49.83 19RO4 G37 C~3JLq 2019 10 26.083200 21 29 06.746 -16 17 05.51 23.0G 19RO4 G37 C~3Qz5 2019 10 26.150510 21 29 06.730 -16 17 05.50 19RO4 G37 C~3Qz5 2019 10 26.218710 21 29 06.619 -16 17 06.44 19RO4 G37 C~3Qz5 2020 09 21.121660 21 36 04.790 -16 10 52.97 23.3G 19RO4 G37 C~4Ae6 2020 09 21.170420 21 36 04.621 -16 10 54.01 19RO4 G37 C~4Ae6 2021 07 09.323940 21 47 05.242 -15 39 01.71 23.2G 19RO4 G37 C~4v6H 2021 07 09.370510 21 47 05.036 -15 39 02.64 19RO4 G37 C~4v6H 2021 07 09.415640 21 47 04.901 -15 39 03.85 19RO4 G37 C~4v6H
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 0.34 0.00 0.12 2 0.0002 -5.52 -0.18 -0.32 0.06 3 0.0003 -9.24 -0.08 -0.59 -0.02 4 0.0083 -203.72 -0.18 -11.50 0.08 5 0.0084 -206.46 0.05 -11.82 -0.09 6 0.0085 -209.14 0.05 -12.03 -0.16 7 0.1421 -2281.07 0.14 -161.13 0.01 8 0.1423 -2281.29 ( 0.81) -161.05 ( 0.24) 9 0.1424 -2283.10 -0.14 -161.44 -0.00 10 1.0484 3545.24 -0.06 -1725.71 0.04 11 1.0485 3542.60 0.06 -1725.91 -0.04 12 1.8457 13189.59 0.19 -3055.78 -0.20 13 1.8458 13186.46 -0.27 -3055.66 0.21 14 1.8459 13184.21 0.08 -3056.15 -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.
19RO4 quality flag:2 Type: SCATEXTD SCATEXTD SCATNEAR axisobj 41.602 41.657 41.548 ecceobj 0.174 0.177 0.172 incobj 19.836 19.836 19.836 qmin 33.952 33.938 33.956 qmax 49.877 49.984 49.594 amean 41.736 41.809 41.573 amin 41.374 41.433 41.197 amax 42.167 42.235 42.078 emean 0.164 0.165 0.156 emin 0.146 0.145 0.135 emax 0.185 0.187 0.181 imean 19.024 19.005 19.003 imin 18.102 18.157 18.093 imax 19.977 19.867 20.012 excite_mean 0.365 0.365 0.361 fracstop 1.000 1.000 1.000 cjmean 2.917 2.918 2.919 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 179.5 177.5 183.4 kozaiamp 180.0 180.0 179.9