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: 09JD19 # Created Wed Dec 25 02:08:58 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 20 observations of 20 # Arc: 11.01y # First observation: 2008/03/02 # Last observation: 2019/03/06 # Chi-squared of fit: 2.69 DOF: 34 RMS: 0.06 # Min/Max residuals: -0.18 0.15 # Exact a, adot, b, bdot, g, gdot: 1.617093E-05 2.955612E-02 5.378756E-06 8.192591E-03 2.815997E-02 -3.326408E-03 # Covariance matrix: 4.1476E-13 -3.9110E-14 2.4659E-14 -1.1306E-15 2.4552E-13 -1.2810E-14 -3.9110E-14 1.3091E-13 -2.7739E-14 3.7048E-14 1.1264E-13 4.2817E-13 2.4659E-14 -2.7739E-14 1.3868E-13 -2.6541E-14 -6.0463E-15 -9.0903E-14 -1.1306E-15 3.7048E-14 -2.6541E-14 1.6967E-14 3.8019E-14 1.2790E-13 2.4552E-13 1.1264E-13 -6.0463E-15 3.8019E-14 3.4998E-13 4.3963E-13 -1.2810E-14 4.2817E-13 -9.0903E-14 1.2790E-13 4.3963E-13 1.4782E-12 # lat0 lon0 xBary yBary zBary JD0 14.544569 -174.795118 0.391580 0.229226 -0.883341 2454528.075486 # Heliocentric elements and errors Epoch: 2454528.5000 = 2008/03/03 Mean Anomaly: 318.64681 +/- 0.012 Argument of Peri: 98.78315 +/- 0.016 Long of Asc Node: 143.40690 +/- 0.000 Inclination: 21.00191 +/- 0.000 Eccentricity: 0.16205021 +/- 0.0001 Semi-Major Axis: 40.79690154 +/- 0.0037 Time of Perihelion: 2465461.6606 +/- 11.8 Perihelion: 34.18575513 +/- 0.0039 Aphelion: 47.40804795 +/- 0.0049 Period (y) 260.5847 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -35.17563542 +/- 0.0007 Ecliptic Y -2.81662760 +/- 0.0001 Ecliptic Z 8.91829046 +/- 0.0002 Ecliptic XDOT 0.00077813 +/- 0.0000 Ecliptic YDOT -0.00281523 +/- 0.0000 Ecliptic ZDOT 0.00068966 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 36.39780289 +/- 0.0007 Geocenter to KBO 35.51150122 +/- 0.0007 # Hcoef: 7.62
The following table shows the complete astrometric record for 09JD19. 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 (09JD19) followed by the observatory code and reference code for the source of the astrometry.
2008 03 02.574732 12 42 24.81 +11 16 22.2 23.0r 09JD19 T14 C~7udm 2008 03 02.583653 12 42 24.76 +11 16 22.8 23.0r 09JD19 T14 C~7udm 2009 05 15.469579 12 43 48.652 +11 37 30.56 23.1i 09JD19 568 C~0aRU 2009 05 20.259695 12 43 33.098 +11 37 52.39 23.1i 09JD19 568 C~0aRU 2009 05 20.297904 12 43 32.979 +11 37 52.50 23.0i 09JD19 568 C~0aRU 2009 05 20.331223 12 43 32.876 +11 37 52.55 22.7i 09JD19 568 C~0aRU 2009 05 20.364003 12 43 32.770 +11 37 52.72 22.8i 09JD19 568 C~0aRU 2009 05 25.324834 12 43 18.612 +11 37 55.86 24.0g 09JD19 568 C~0aRU 2009 05 25.372759 12 43 18.478 +11 37 55.76 24.1g 09JD19 568 C~0aRU 2009 05 26.266896 12 43 16.163 +11 37 54.25 24.1g 09JD19 568 C~0aRU 2009 05 26.314666 12 43 16.036 +11 37 54.15 24.0g 09JD19 568 C~0aRU 2009 05 26.362558 12 43 15.908 +11 37 54.05 23.9g 09JD19 568 C~0aRU 2009 05 26.442171 12 43 15.695 +11 37 53.77 09JD19 568 C~0aRU 2009 06 16.365819 12 42 42.300 +11 34 21.96 09JD19 568 C~0aRU 2009 06 28.335955 12 42 42.350 +11 29 59.70 09JD19 568 C~0aRU 2016 02 12.529503 13 40 59.09 +08 37 31.4 23.1r 09JD19 T14 C~7udm 2016 02 12.577879 13 40 59.01 +08 37 33.4 23.0r 09JD19 T14 C~7udm 2016 06 08.316530 13 32 56.61 +09 33 25.9 22.8r 09JD19 T14 C~7udm 2016 06 08.366607 13 32 56.48 +09 33 25.5 09JD19 T14 C~7udm 2019 03 06.281482 14 02 14.69 +07 48 16.5 22.9r 09JD19 W84 C~7udm
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 0.02 0.00 -0.18
2 0.0000 0.00 -0.15 0.00 0.03
3 1.2016 0.00 0.10 0.00 0.07
4 1.2147 0.00 -0.01 0.00 0.03
5 1.2148 0.00 0.02 0.00 0.04
6 1.2149 0.00 0.05 0.00 -0.00
7 1.2150 0.00 0.01 0.00 0.09
8 1.2286 0.00 0.00 0.00 -0.01
9 1.2287 0.00 -0.04 0.00 -0.04
10 1.2312 0.00 0.03 0.00 -0.04
11 1.2313 0.00 0.03 0.00 -0.04
12 1.2315 0.00 0.02 0.00 -0.04
13 1.2317 0.00 -0.04 0.00 -0.13
14 1.2890 0.00 -0.05 0.00 0.08
15 1.3217 0.00 0.08 0.00 0.15
16 7.9479 0.00 0.00 0.00 -0.01
17 7.9480 0.00 0.00 0.00 -0.04
18 8.2676 0.00 -0.10 0.00 -0.01
19 8.2677 0.00 0.01 0.00 0.01
20 11.0081 0.00 0.01 0.00 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.
09JD19 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 40.484 40.484 40.484 ecceobj 0.155 0.155 0.155 incobj 21.006 21.006 21.006 qmin 33.552 33.801 33.869 qmax 48.300 48.004 47.911 amean 40.700 40.695 40.699 amin 40.282 40.295 40.295 amax 41.147 41.126 41.115 emean 0.148 0.149 0.143 emin 0.126 0.129 0.121 emax 0.174 0.168 0.167 imean 20.274 20.265 20.406 imin 19.304 19.301 19.311 imax 21.108 21.208 21.318 excite_mean 0.377 0.377 0.377 fracstop 1.000 1.000 1.000 cjmean 2.897 2.897 2.897 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 180.4 179.6 179.6 kozaiamp 180.0 180.0 180.0