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: 09KW36 # Created Fri Apr 19 01:13:11 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 26 observations of 26 # Arc: 9.86y # First observation: 2009/05/27 # Last observation: 2019/04/06 # Chi-squared of fit: 10.66 DOF: 46 RMS: 0.11 # Min/Max residuals: -0.21 0.32 # Exact a, adot, b, bdot, g, gdot: 1.418934E-05 2.188342E-02 -6.659637E-06 -1.025780E-02 2.458163E-02 -4.181768E-04 # Covariance matrix: 1.2666E-13 -3.9461E-14 -5.1005E-15 1.5244E-14 -1.0508E-13 -1.5199E-13 -3.9461E-14 1.1359E-13 2.1343E-14 -4.3879E-14 -9.9142E-14 4.5722E-13 -5.1005E-15 2.1343E-14 9.9710E-14 -2.0074E-14 -2.0737E-14 8.8062E-14 1.5244E-14 -4.3879E-14 -2.0074E-14 2.1504E-14 1.6902E-14 -1.8828E-13 -1.0508E-13 -9.9142E-14 -2.0737E-14 1.6902E-14 7.9261E-13 -2.1320E-13 -1.5199E-13 4.5722E-13 8.8062E-14 -1.8828E-13 -2.1320E-13 1.9514E-12 # lat0 lon0 xBary yBary zBary JD0 11.980357 178.970146 -0.928787 0.082774 -0.390176 2454978.759314 # Heliocentric elements and errors Epoch: 2454978.5000 = 2009/05/27 Mean Anomaly: 36.90727 +/- 1.026 Argument of Peri: 116.73878 +/- 1.035 Long of Asc Node: 23.70231 +/- 0.000 Inclination: 27.87188 +/- 0.000 Eccentricity: 0.00387944 +/- 0.0001 Semi-Major Axis: 41.20635068 +/- 0.0064 Time of Perihelion: 2445073.5088 +/- 275.5 Perihelion: 41.04649319 +/- 0.0079 Aphelion: 41.36620816 +/- 0.0080 Period (y) 264.5175 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -40.20094663 +/- 0.0014 Ecliptic Y -0.21080204 +/- 0.0000 Ecliptic Z 8.44413700 +/- 0.0003 Ecliptic XDOT -0.00023048 +/- 0.0000 Ecliptic YDOT -0.00242935 +/- 0.0000 Ecliptic ZDOT -0.00112738 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.07875213 +/- 0.0014 Geocenter to KBO 40.68084777 +/- 0.0015 # Hcoef: 8.46
The following table shows the complete astrometric record for 09KW36. 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 (09KW36) followed by the observatory code and reference code for the source of the astrometry.
2009 05 27.258548 12 15 32.649 +11 23 14.53 25.4g 09KW36 568 C~0aRU 2009 05 27.306288 12 15 32.544 +11 23 13.97 25.7g 09KW36 568 C~0aRU 2009 05 27.355410 12 15 32.451 +11 23 13.42 25.3g 09KW36 568 C~0aRU 2009 05 28.264426 12 15 30.701 +11 23 02.82 25.5g 09KW36 568 C~0aRU 2009 05 28.311941 12 15 30.601 +11 23 02.20 25.3g 09KW36 568 C~0aRU 2009 05 29.289294 12 15 28.784 +11 22 50.29 24.3i 09KW36 568 C~0aRU 2009 06 22.263448 12 15 10.042 +11 14 50.03 24.5i 09KW36 568 C~0aRU 2009 06 24.251963 12 15 10.779 +11 13 54.92 09KW36 568 C~0aRU 2009 06 24.290428 12 15 10.772 +11 13 53.89 25.1i 09KW36 568 C~0aRU 2009 06 24.322809 12 15 10.792 +11 13 52.85 24.8i 09KW36 568 C~0aRU 2010 04 12.373311 12 21 54.90 +10 17 14.3 24.6g 09KW36 T14 C~7udm 2010 04 13.318706 12 21 50.47 +10 17 30.2 09KW36 T14 C~7udm 2010 04 13.376168 12 21 50.19 +10 17 31.1 24.7g 09KW36 T14 C~7udm 2010 04 13.433852 12 21 49.92 +10 17 32.1 09KW36 T14 C~7udm 2010 04 14.335679 12 21 45.76 +10 17 47.3 24.5g 09KW36 T14 C~7udm 2010 04 14.410718 12 21 45.40 +10 17 48.4 09KW36 T14 C~7udm 2012 04 13.479782 12 29 09.10 +08 09 51.4 24.0r 09KW36 T14 C~7udm 2017 04 02.40315 12 48 14.81 +02 43 37.4 24.1r 09KW36 T09 C~7udm 2017 04 02.42800 12 48 14.69 +02 43 38.1 24.2r 09KW36 T09 C~7udm 2017 04 02.50262 12 48 14.33 +02 43 39.9 24.7r 09KW36 T09 C~7udm 2017 04 02.50471 12 48 14.30 +02 43 39.8 24.8r 09KW36 T09 C~7udm 2017 07 20.270297 12 44 13.45 +02 42 23.9 23.8r 09KW36 T14 C~7udm 2019 04 06.38392 12 55 11.22 +00 35 44.0 24.4i 09KW36 T09 C~7udm 2019 04 06.41638 12 55 11.06 +00 35 45.1 24.2i 09KW36 T09 C~7udm 2019 04 06.43318 12 55 10.97 +00 35 45.2 24.5i 09KW36 T09 C~7udm 2019 04 06.52853 12 55 10.50 +00 35 47.7 24.2i 09KW36 T09 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 0.02
2 0.0001 0.00 -0.11 0.00 0.00
3 0.0003 0.00 0.01 0.00 0.02
4 0.0028 0.00 0.09 0.00 0.01
5 0.0029 0.00 0.01 0.00 -0.04
6 0.0056 0.00 -0.05 0.00 0.08
7 0.0712 0.00 0.10 0.00 0.05
8 0.0766 0.00 0.20 0.00 -0.06
9 0.0767 0.00 -0.13 0.00 -0.00
10 0.0768 0.00 -0.02 0.00 -0.12
11 0.8764 0.00 0.19 0.00 0.13
12 0.8790 0.00 -0.10 0.00 -0.09
13 0.8792 0.00 -0.21 0.00 -0.16
14 0.8793 0.00 -0.16 0.00 -0.13
15 0.8818 0.00 0.07 0.00 0.16
16 0.8820 0.00 -0.02 0.00 0.04
17 2.8808 0.00 0.32 0.00 0.03
18 7.8498 0.00 -0.03 0.00 -0.00
19 7.8499 0.00 0.01 0.00 0.11
20 7.8501 0.00 0.12 0.00 0.14
21 7.8501 0.00 -0.17 0.00 -0.01
22 8.1479 0.00 -0.07 0.00 -0.11
23 9.8593 0.00 0.06 0.00 -0.21
24 9.8594 0.00 0.06 0.00 0.14
25 9.8595 0.00 -0.05 0.00 -0.15
26 9.8597 0.00 -0.06 0.00 0.13
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.
09KW36 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 41.175 41.175 41.175 ecceobj 0.006 0.006 0.006 incobj 27.920 27.920 27.920 qmin 40.498 40.500 40.496 qmax 42.322 42.321 42.324 amean 41.346 41.346 41.346 amin 41.038 41.039 41.038 amax 41.647 41.647 41.647 emean 0.008 0.008 0.008 emin 0.000 0.000 0.000 emax 0.017 0.017 0.017 imean 27.491 27.491 27.491 imin 27.158 27.157 27.158 imax 27.817 27.817 27.816 excite_mean 0.462 0.462 0.462 fracstop 1.000 1.000 1.000 cjmean 2.807 2.807 2.807 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 178.6 178.7 178.6 kozaiamp 180.0 180.0 179.9