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: 02PO149 # Created Sun Dec 22 02:08:23 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 19 observations of 19 # Arc: 20.04y # First observation: 2002/08/11 # Last observation: 2022/08/27 # Chi-squared of fit: 26.43 DOF: 32 RMS: 0.21 # Min/Max residuals: -0.92 0.48 # Exact a, adot, b, bdot, g, gdot: 1.609843E-05 2.001841E-02 4.087026E-06 -1.401887E-05 2.216178E-02 9.725854E-04 # Covariance matrix: 3.2722E-13 -6.9375E-14 -4.7443E-16 6.4518E-17 2.0437E-13 -1.3464E-13 -6.9375E-14 4.0311E-14 7.9317E-17 -3.1398E-17 -1.4511E-14 9.3374E-14 -4.7443E-16 7.9317E-17 1.4973E-13 -8.7625E-15 -7.9216E-16 1.4907E-16 6.4518E-17 -3.1398E-17 -8.7625E-15 1.0196E-15 4.6442E-17 -7.2816E-17 2.0437E-13 -1.4511E-14 -7.9216E-16 4.6442E-17 3.9969E-13 -1.4110E-14 -1.3464E-13 9.3374E-14 1.4907E-16 -7.2816E-17 -1.4110E-14 2.2295E-13 # lat0 lon0 xBary yBary zBary JD0 -0.684658 -21.969073 0.344184 -0.011452 -0.957174 2452497.833213 # Heliocentric elements and errors Epoch: 2452498.5000 = 2002/08/12 Mean Anomaly: 139.85696 +/- 0.064 Argument of Peri: 122.11662 +/- 0.055 Long of Asc Node: 71.25222 +/- 0.008 Inclination: 0.67160 +/- 0.000 Eccentricity: 0.06301642 +/- 0.0001 Semi-Major Axis: 43.89689567 +/- 0.0048 Time of Perihelion: 2411228.8568 +/- 20.1 Perihelion: 41.13067057 +/- 0.0053 Aphelion: 46.66312078 +/- 0.0058 Period (y) 290.8432 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 42.60214273 +/- 0.0012 Ecliptic Y -17.55085410 +/- 0.0005 Ecliptic Z -0.53901922 +/- 0.0000 Ecliptic XDOT 0.00102883 +/- 0.0000 Ecliptic YDOT 0.00224591 +/- 0.0000 Ecliptic ZDOT -0.00000296 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 46.07888119 +/- 0.0011 Geocenter to KBO 45.12272451 +/- 0.0013 # Hcoef: 6.67
The following table shows the complete astrometric record for 02PO149. 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 (02PO149) followed by the observatory code and reference code for the source of the astrometry.
2002 08 11.33247 22 39 47.68 -09 11 35.4 22.1R 02PO149 807 Cg3357 2002 08 12.30038 22 39 43.91 -09 11 57.3 02PO149 807 Cg3357 2002 08 12.37854 22 39 43.60 -09 11 59.2 02PO149 807 Cg3357 2003 08 25.24172 22 43 10.58 -08 51 25.1 22.1R 02PO149 807 Cj4656 2003 08 25.34637 22 43 10.14 -08 51 27.5 02PO149 807 Cj4656 2003 10 24.13064 22 39 34.98 -09 12 33.6 23.3R 02PO149 695 Cj4656 2003 10 24.25318 22 39 34.68 -09 12 35.2 02PO149 695 Cj4656 2004 08 23.11057 22 47 33.15 -08 25 02.3 22.9R 02PO149 304 Cl4338 2004 08 23.16593 22 47 32.89 -08 25 04.0 02PO149 304 Cl4338 2004 11 10.16302 22 43 20.20 -08 49 52.5 23.4R 02PO149 695 Cl9843 2004 11 11.13762 22 43 19.25 -08 49 57.2 02PO149 695 Cl9843 2014 07 29.39913 23 31 02.90 -03 51 32.3 23.4R 02PO149 G37 C~16a9 2014 07 29.44709 23 31 02.77 -03 51 33.0 02PO149 G37 C~16a9 2021 08 08.352970 23 59 18.575 -00 47 08.94 23.7G 02PO149 G37 C~4xMh 2021 08 08.401670 23 59 18.423 -00 47 09.90 02PO149 G37 C~4xMh 2021 08 08.447340 23 59 18.298 -00 47 10.70 02PO149 G37 C~4xMh 2022 08 27.396400 00 02 25.730 -00 26 44.87 23.3G 02PO149 G37 C~5nE1 2022 08 27.430370 00 02 25.599 -00 26 45.62 02PO149 G37 C~5nE1 2022 08 27.466430 00 02 25.480 -00 26 46.46 02PO149 G37 C~5nE1
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 -0.92
2 0.0026 0.00 -0.04 0.00 -0.01
3 0.0029 0.00 -0.04 0.00 -0.07
4 1.0374 0.00 0.04 0.00 0.28
5 1.0377 0.00 0.02 0.00 0.48
6 1.2014 0.00 0.08 0.00 0.14
7 1.2017 0.00 -0.15 0.00 0.08
8 2.0336 0.00 0.42 0.00 0.24
9 2.0338 0.00 -0.04 0.00 -0.07
10 2.2500 0.00 -0.04 0.00 -0.11
11 2.2527 0.00 -0.03 0.00 0.00
12 11.9646 0.00 -0.08 0.00 -0.00
13 11.9647 0.00 -0.11 0.00 0.13
14 18.9925 0.00 0.11 0.00 -0.01
15 18.9927 0.00 -0.15 0.00 -0.08
16 18.9928 0.00 -0.12 0.00 -0.05
17 20.0440 0.00 0.09 0.00 -0.04
18 20.0441 0.00 -0.03 0.00 0.01
19 20.0442 0.00 0.13 0.00 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.
02PO149 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.226 44.226 44.226 ecceobj 0.057 0.057 0.057 incobj 0.672 0.672 0.672 qmin 40.606 40.618 40.620 qmax 47.757 47.765 47.753 amean 44.088 44.088 44.088 amin 43.742 43.746 43.743 amax 44.447 44.454 44.455 emean 0.059 0.059 0.059 emin 0.043 0.043 0.043 emax 0.075 0.075 0.074 imean 1.276 1.276 1.276 imin 0.505 0.505 0.505 imax 1.809 1.809 1.809 excite_mean 0.064 0.064 0.064 fracstop 1.000 1.000 1.000 cjmean 3.098 3.098 3.098 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 153.8 153.9 153.9 kozaiamp 179.9 180.0 179.9