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: 23PD5 # Created Wed Apr 16 01:11:35 2025 # Orbit generated from Bernstein formalism # Fitting 8 observations of 8 # Arc: 1.14y # First observation: 2023/08/13 # Last observation: 2024/10/04 Preliminary a, adot, b, bdot, g, gdot: -0.000016 0.040010 0.000002 -0.003686 0.032638 0.000000 # Chi-squared of fit: 2.13 DOF: 10 RMS: 0.09 # Min/Max residuals: -0.18 0.17 # Exact a, adot, b, bdot, g, gdot: 1.919887E-05 4.064826E-02 -1.052879E-06 -3.741233E-03 3.324469E-02 -6.518240E-03 # Covariance matrix: 7.4479E-13 5.7142E-12 -6.9866E-16 -6.3179E-13 3.5154E-12 1.6481E-10 5.7142E-12 9.0305E-10 3.1974E-12 -9.7464E-11 3.2052E-10 2.6577E-08 -6.9866E-16 3.1974E-12 3.0321E-13 -6.4619E-13 1.0627E-12 9.4850E-11 -6.3179E-13 -9.7464E-11 -6.4619E-13 1.1406E-11 -3.4567E-11 -2.8717E-09 3.5154E-12 3.2052E-10 1.0627E-12 -3.4567E-11 1.1847E-10 9.4012E-09 1.6481E-10 2.6577E-08 9.4850E-11 -2.8717E-09 9.4012E-09 7.8332E-07 # lat0 lon0 xBary yBary zBary JD0 -2.526154 -65.852688 -0.432889 -0.040391 -0.909373 2460169.789891 # Heliocentric elements and errors Epoch: 2460160.5000 = 2023/08/04 Mean Anomaly: 334.55533 +/- 2.061 Argument of Peri: 248.18070 +/- 4.199 Long of Asc Node: 89.81725 +/- 0.018 Inclination: 5.75301 +/- 0.004 Eccentricity: 0.25819746 +/- 0.0177 Semi-Major Axis: 39.48710317 +/- 0.4015 Time of Perihelion: 2466566.3338 +/- 509.6 Perihelion: 29.29163361 +/- 0.7583 Aphelion: 49.68257274 +/- 0.8611 Period (y) 248.1368 +/- 3.78 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 13.06975962 +/- 0.0040 Ecliptic Y -28.07268170 +/- 0.0090 Ecliptic Z -1.32576335 +/- 0.0004 Ecliptic XDOT 0.00282631 +/- 0.0000 Ecliptic YDOT 0.00187934 +/- 0.0001 Ecliptic ZDOT -0.00028414 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 30.99438212 +/- 0.0083 Geocenter to KBO 30.07998958 +/- 0.0098 # Hcoef: 7.45
The following table shows the complete astrometric record for 23PD5. 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 (23PD5) followed by the observatory code and reference code for the source of the astrometry.
2023 08 13.28909 19 46 05.664 -23 46 09.71 22.4r 23PD5 T09 C~8nlW 2023 08 13.42757 19 46 04.836 -23 46 11.73 22.4r 23PD5 T09 C~8nlW 2023 09 13.98707 19 43 43.586 -23 51 16.49 22.4r 23PD5 269 C~8nlW 2023 09 14.99896 19 43 40.771 -23 51 20.91 22.3r 23PD5 269 C~8nlW 2023 10 05.99244 19 43 12.670 -23 51 33.05 22.3r 23PD5 269 C~8nlW 2023 10 06.99563 19 43 12.810 -23 51 29.68 22.4r 23PD5 269 C~8nlW 2024 10 03.11934 19 53 13.089 -23 39 12.40 23PD5 G37 C~8nlW 2024 10 04.09500 19 53 12.630 -23 39 10.39 23PD5 G37 C~8nlW
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 0.03 0.00 -0.15
2 0.0004 -11.54 -0.03 0.03 -0.18
3 0.0868 -1973.38 0.07 40.68 0.01
4 0.0896 -2012.18 -0.13 43.03 0.12
5 0.1470 -2394.00 0.07 97.85 0.08
6 0.1498 -2391.53 -0.01 100.84 0.17
7 1.1412 5848.28 0.00 -669.86 -0.01
8 1.1439 5842.46 -0.00 -666.68 -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.
23PD5 quality flag:2 Type: 3:2E CENTAURR CENTAURR axisobj 39.195 39.899 38.901 ecceobj 0.256 0.253 0.276 incobj 5.757 5.771 5.744 qmin 28.891 29.210 28.160 qmax 50.548 50.331 55.395 amean 39.455 38.252 40.622 amin 39.013 36.904 38.901 amax 39.983 40.170 42.102 emean 0.235 0.226 0.295 emin 0.204 0.201 0.270 emax 0.266 0.254 0.316 imean 6.590 3.902 4.445 imin 4.005 3.511 3.963 imax 8.604 4.295 4.789 excite_mean 0.263 0.236 0.305 fracstop 1.000 0.006 0.005 cjmean 2.973 2.976 2.953 libcent 0 179.8 -180.0 -180.0 libamp 0 80.8 -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 242.2 266.4 276.3 kozaiamp 113.3 36.3 15.6