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: 09DK143 # Created Wed Nov 27 02:08:58 2024 # Orbit generated from Bernstein formalism # Fitting 13 observations of 13 # Arc: 32.96d # First observation: 2009/02/18 # Last observation: 2009/03/23 Preliminary a, adot, b, bdot, g, gdot: 0.000000 0.032007 -0.000001 0.001195 0.027568 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 2.25 DOF: 21 RMS: 0.07 # Min/Max residuals: -0.11 0.15 # Exact a, adot, b, bdot, g, gdot: 1.632837E-05 2.898249E-02 1.290099E-06 1.335416E-03 2.696821E-02 3.349513E-03 # Covariance matrix: 5.4898E-13 3.4160E-10 -2.0964E-13 -1.6007E-11 6.7902E-11 5.1434E-09 3.4160E-10 7.4942E-07 -3.9882E-10 -3.6433E-08 1.3735E-07 6.2234E-06 -2.0964E-13 -3.9882E-10 4.0251E-13 1.6646E-11 -7.3726E-11 -3.6082E-09 -1.6007E-11 -3.6433E-08 1.6646E-11 1.8687E-09 -6.6610E-09 -2.9441E-07 6.7902E-11 1.3735E-07 -7.3726E-11 -6.6610E-09 2.5290E-08 1.1945E-06 5.1434E-09 6.2234E-06 -3.6082E-09 -2.9441E-07 1.1945E-06 7.7266E-05 # lat0 lon0 xBary yBary zBary JD0 10.157717 -177.130859 0.541834 0.146707 -0.818783 2454881.095146 # Heliocentric elements and errors Epoch: 2454880.5000 = 2009/02/18 Mean Anomaly: 32.85297 +/- 47.476 Argument of Peri: 29.81976 +/- 75.652 Long of Asc Node: 107.98323 +/- 0.664 Inclination: 10.32440 +/- 0.034 Eccentricity: 0.15751867 +/- 0.2711 Semi-Major Axis: 43.23329366 +/- 5.5307 Time of Perihelion: 2445405.0904 +/- 13571.6 Perihelion: 36.42324266 +/- 12.6113 Aphelion: 50.04334466 +/- 13.3536 Period (y) 284.2730 +/- 54.55 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -37.30922262 +/- 0.2150 Ecliptic Y -1.33243274 +/- 0.0108 Ecliptic Z 6.53955511 +/- 0.0386 Ecliptic XDOT -0.00015780 +/- 0.0009 Ecliptic YDOT -0.00295093 +/- 0.0001 Ecliptic ZDOT 0.00019331 +/- 0.0002 # Distances at JD0 (AU) Heliocenter to KBO 37.90144127 +/- 0.2117 Geocenter to KBO 37.08070047 +/- 0.2187 # Hcoef: 8.90
The following table shows the complete astrometric record for 09DK143. 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 (09DK143) followed by the observatory code and reference code for the source of the astrometry.
2009 02 18.594380 12 26 46.197 +08 10 32.07 24.5i 09DK143 568 C~0aRQ 2009 02 18.632292 12 26 46.047 +08 10 33.64 24.2i 09DK143 568 C~0aRQ 2009 02 19.490393 12 26 42.868 +08 11 03.74 24.1i 09DK143 568 C~0aRQ 2009 02 19.530496 12 26 42.720 +08 11 05.30 24.2i 09DK143 568 C~0aRQ 2009 02 22.598773 12 26 30.913 +08 12 53.97 25.8g 09DK143 568 C~0aRQ 2009 02 23.489931 12 26 27.392 +08 13 25.94 25.0g 09DK143 568 C~0aRQ 2009 02 23.546087 12 26 27.160 +08 13 27.93 25.1g 09DK143 568 C~0aRQ 2009 02 23.601690 12 26 26.929 +08 13 29.92 25.4g 09DK143 568 C~0aRQ 2009 02 26.471081 12 26 15.258 +08 15 12.79 09DK143 568 C~0aRQ 2009 02 26.494902 12 26 15.147 +08 15 13.76 09DK143 568 C~0aRQ 2009 03 23.439060 12 24 19.713 +08 29 49.91 09DK143 568 C~0aRQ 2009 03 23.494565 12 24 19.438 +08 29 51.86 09DK143 568 C~0aRQ 2009 03 23.551236 12 24 19.151 +08 29 53.50 09DK143 568 C~0aRQ
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 0.14 0.00 -0.10
2 0.0001 -2.67 -0.05 0.54 0.07
3 0.0025 -57.98 -0.03 9.17 -0.05
4 0.0026 -60.62 -0.00 9.72 0.12
5 0.0110 -264.79 0.01 38.91 -0.11
6 0.0134 -325.50 -0.02 47.23 0.03
7 0.0136 -329.45 -0.05 47.67 -0.01
8 0.0137 -333.39 -0.10 48.12 -0.02
9 0.0216 -533.36 0.15 72.85 0.02
10 0.0216 -535.26 -0.03 73.08 0.07
11 0.0899 -2455.93 -0.01 189.82 -0.01
12 0.0901 -2460.45 -0.02 189.97 0.12
13 0.0902 -2465.01 0.02 189.77 -0.11
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.
09DK143 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0