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: 09DP143 # Created Fri Nov 22 02:09:00 2024 # Orbit generated from Bernstein formalism # Fitting 10 observations of 10 # Arc: 99.66d # First observation: 2009/02/18 # Last observation: 2009/05/29 Preliminary a, adot, b, bdot, g, gdot: -0.000014 0.025481 -0.000015 0.004082 0.023036 0.000000 # Chi-squared of fit: 1.78 DOF: 14 RMS: 0.07 # Min/Max residuals: -0.17 0.12 # Exact a, adot, b, bdot, g, gdot: 1.367591E-05 1.928734E-02 2.341314E-06 3.913571E-03 2.199906E-02 -1.541062E-03 # Covariance matrix: 2.8520E-13 -6.7131E-12 8.1258E-15 -3.2276E-14 -2.6286E-13 1.6227E-10 -6.7131E-12 6.1554E-09 -1.4144E-11 1.3180E-10 9.0234E-10 -4.5287E-08 8.1258E-15 -1.4144E-11 2.6315E-13 -1.5483E-12 -2.1282E-12 9.3453E-11 -3.2276E-14 1.3180E-10 -1.5483E-12 2.1316E-11 2.0302E-11 -7.6532E-10 -2.6286E-13 9.0234E-10 -2.1282E-12 2.0302E-11 1.3853E-10 -5.3412E-09 1.6227E-10 -4.5287E-08 9.3453E-11 -7.6532E-10 -5.3412E-09 6.3021E-07 # lat0 lon0 xBary yBary zBary JD0 11.359829 -174.834997 0.574565 0.159466 -0.793699 2454881.106125 # Heliocentric elements and errors Epoch: 2454880.5000 = 2009/02/18 Mean Anomaly: 243.26714 +/- 14.425 Argument of Peri: 171.59755 +/- 13.464 Long of Asc Node: 141.23018 +/- 0.111 Inclination: 16.07487 +/- 0.032 Eccentricity: 0.10963925 +/- 0.0281 Semi-Major Axis: 43.70866617 +/- 0.4459 Time of Perihelion: 2489105.2576 +/- 4196.7 Perihelion: 38.91648100 +/- 1.2920 Aphelion: 48.50085133 +/- 1.3253 Period (y) 288.9745 +/- 4.42 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -45.24055806 +/- 0.0237 Ecliptic Y -3.51764813 +/- 0.0021 Ecliptic Z 8.95368738 +/- 0.0048 Ecliptic XDOT 0.00050424 +/- 0.0001 Ecliptic YDOT -0.00236178 +/- 0.0000 Ecliptic ZDOT 0.00043963 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 46.25203196 +/- 0.0232 Geocenter to KBO 45.45649387 +/- 0.0243 # Hcoef: 8.32
The following table shows the complete astrometric record for 09DP143. 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 (09DP143) followed by the observatory code and reference code for the source of the astrometry.
2009 02 18.605359 12 37 04.201 +08 22 21.04 24.3i 09DP143 568 C~0aRR 2009 02 18.642929 12 37 04.082 +08 22 22.16 24.4i 09DP143 568 C~0aRR 2009 02 19.525025 12 37 01.448 +08 22 50.18 24.6i 09DP143 568 C~0aRR 2009 02 22.430788 12 36 52.439 +08 24 22.82 09DP143 568 C~0aRR 2009 02 22.558180 12 36 52.013 +08 24 26.99 25.7g 09DP143 568 C~0aRR 2009 02 22.614330 12 36 51.847 +08 24 28.67 26.0g 09DP143 568 C~0aRR 2009 03 25.428002 12 34 55.807 +08 40 42.11 09DP143 568 C~0aRR 2009 03 25.454983 12 34 55.688 +08 40 42.70 09DP143 568 C~0aRR 2009 04 27.338330 12 32 45.421 +08 53 41.29 09DP143 568 C~0aRR 2009 05 29.268302 12 31 18.604 +08 57 55.66 09DP143 568 C~0aRR
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 0.04 0.00 0.10
2 0.0001 -2.07 -0.00 0.32 0.01
3 0.0025 -49.10 0.01 10.34 0.06
4 0.0105 -208.70 0.01 41.71 -0.05
5 0.0108 -216.16 -0.17 43.00 -0.04
6 0.0110 -219.09 0.11 43.56 -0.05
7 0.0953 -2186.08 0.01 247.78 0.05
8 0.0954 -2187.93 0.01 247.62 -0.17
9 0.1854 -4269.84 -0.03 192.19 0.12
10 0.2729 -5552.18 0.02 -85.70 -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.
09DP143 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 43.537 45.361 42.687 ecceobj 0.109 0.203 0.085 incobj 16.066 15.991 16.159 qmin 38.646 35.473 38.630 qmax 49.164 56.221 47.473 amean 43.728 45.650 42.917 amin 43.335 45.222 42.586 amax 44.143 46.129 43.284 emean 0.093 0.203 0.082 emin 0.075 0.188 0.070 emax 0.115 0.219 0.097 imean 15.156 14.658 15.015 imin 14.496 13.939 14.511 imax 15.779 15.390 15.639 excite_mean 0.278 0.325 0.272 fracstop 1.000 1.000 1.000 cjmean 3.005 2.992 3.001 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 181.5 187.6 180.9 kozaiamp 180.0 180.0 180.0