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: 09DL143 # Created Wed Dec 25 02:08:58 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 31 observations of 31 # Arc: 13.13y # First observation: 2009/02/18 # Last observation: 2022/04/08 # Chi-squared of fit: 16.64 DOF: 56 RMS: 0.13 # Min/Max residuals: -0.32 0.41 # Exact a, adot, b, bdot, g, gdot: 1.480695E-05 2.166039E-02 1.528975E-06 1.298493E-03 2.310507E-02 1.256876E-03 # Covariance matrix: 1.4040E-13 -2.4388E-14 6.2317E-16 -1.3858E-15 1.0951E-13 -7.2761E-14 -2.4388E-14 3.0863E-14 -1.1419E-15 1.8662E-15 6.4892E-16 1.1269E-13 6.2317E-16 -1.1419E-15 6.7056E-14 -7.3300E-15 -1.5900E-16 -4.5930E-15 -1.3858E-15 1.8662E-15 -7.3300E-15 2.9984E-15 -3.8207E-16 7.5279E-15 1.0951E-13 6.4892E-16 -1.5900E-16 -3.8207E-16 1.9206E-13 -3.9945E-15 -7.2761E-14 1.1269E-13 -4.5930E-15 7.5279E-15 -3.9945E-15 4.5391E-13 # lat0 lon0 xBary yBary zBary JD0 10.628508 -176.902385 0.545147 0.153030 -0.815420 2454881.095146 # Heliocentric elements and errors Epoch: 2454880.5000 = 2009/02/18 Mean Anomaly: 105.31369 +/- 0.083 Argument of Peri: 320.92911 +/- 0.074 Long of Asc Node: 111.51430 +/- 0.001 Inclination: 11.02458 +/- 0.000 Eccentricity: 0.04554602 +/- 0.0000 Semi-Major Axis: 43.49187144 +/- 0.0033 Time of Perihelion: 2424233.1527 +/- 24.5 Perihelion: 41.51098995 +/- 0.0034 Aphelion: 45.47275293 +/- 0.0037 Period (y) 286.8272 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -43.33132881 +/- 0.0008 Ecliptic Y -1.80412134 +/- 0.0000 Ecliptic Z 7.98276193 +/- 0.0002 Ecliptic XDOT 0.00002620 +/- 0.0000 Ecliptic YDOT -0.00256601 +/- 0.0000 Ecliptic ZDOT 0.00017859 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.09740294 +/- 0.0008 Geocenter to KBO 43.28054103 +/- 0.0008 # Hcoef: 7.47
The following table shows the complete astrometric record for 09DL143. 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 (09DL143) followed by the observatory code and reference code for the source of the astrometry.
2009 02 18.594380 12 28 21.972 +08 30 59.51 23.3i 09DL143 568 C~0aRQ 2009 02 18.632292 12 28 21.850 +08 31 00.77 23.5i 09DL143 568 C~0aRQ 2009 02 19.490393 12 28 19.054 +08 31 27.58 23.4i 09DL143 568 C~0aRQ 2009 02 19.530496 12 28 18.914 +08 31 28.83 23.4i 09DL143 568 C~0aRQ 2009 02 19.550301 12 28 18.843 +08 31 29.52 23.7i 09DL143 568 C~0aRQ 2009 02 22.598773 12 28 08.539 +08 33 05.60 24.7g 09DL143 568 C~0aRQ 2009 02 23.489931 12 28 05.438 +08 33 33.84 24.7g 09DL143 568 C~0aRQ 2009 02 23.546087 12 28 05.232 +08 33 35.60 24.6g 09DL143 568 C~0aRQ 2009 02 23.601690 12 28 05.030 +08 33 37.32 24.7g 09DL143 568 C~0aRQ 2009 03 23.478749 12 26 13.139 +08 48 05.44 09DL143 568 C~0aRQ 2009 03 23.535406 12 26 12.890 +08 48 07.04 09DL143 568 C~0aRQ 2009 04 19.345773 12 24 19.891 +08 59 06.95 09DL143 568 C~0aRQ 2009 04 23.309063 12 24 04.590 +09 00 19.29 09DL143 568 C~0aRQ 2009 04 27.251842 12 23 50.010 +09 01 22.68 09DL143 568 C~0aRQ 2009 05 01.271384 12 23 35.864 +09 02 19.39 09DL143 568 C~0aRQ 2009 05 01.339707 12 23 35.621 +09 02 20.16 09DL143 568 C~0aRQ 2009 05 01.382777 12 23 35.468 +09 02 20.84 09DL143 568 C~0aRQ 2009 05 01.422029 12 23 35.341 +09 02 21.25 09DL143 568 C~0aRQ 2009 05 01.460305 12 23 35.204 +09 02 21.71 09DL143 568 C~0aRQ 2009 05 17.428702 12 22 47.962 +09 04 35.91 09DL143 568 C~0aRQ 2013 03 12.28846 12 45 46.50 +06 58 04.9 23.1R 09DL143 695 C~0ue3 2013 03 12.34210 12 45 46.26 +06 58 06.5 09DL143 695 C~0ue3 2013 03 13.31021 12 45 42.41 +06 58 36.6 09DL143 695 C~0ue3 2013 05 14.17770 12 41 37.27 +07 21 19.0 23.7R 09DL143 G37 C~14j8 2013 05 14.25415 12 41 37.05 +07 21 19.7 09DL143 G37 C~14j8 2015 02 18.31940 12 56 19.45 +05 53 31.8 23.5R 09DL143 695 C~1M6r 2015 02 18.41318 12 56 19.20 +05 53 34.4 09DL143 695 C~1M6r 2015 02 18.50216 12 56 18.95 +05 53 37.3 09DL143 695 C~1M6r 2022 04 08.251540 13 25 20.440 +03 09 59.85 24.0G 09DL143 G37 C~5ZXL 2022 04 08.292160 13 25 20.242 +03 10 01.31 09DL143 G37 C~5ZXL 2022 04 08.332940 13 25 20.071 +03 10 02.12 09DL143 G37 C~5ZXL
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 -0.05 0.00 -0.12
2 0.0001 0.00 0.01 0.00 -0.04
3 0.0025 0.00 0.03 0.00 -0.09
4 0.0026 0.00 -0.04 0.00 -0.10
5 0.0026 0.00 -0.10 0.00 -0.03
6 0.0110 0.00 0.08 0.00 -0.02
7 0.0134 0.00 0.04 0.00 -0.02
8 0.0136 0.00 -0.03 0.00 -0.04
9 0.0137 0.00 -0.07 0.00 -0.08
10 0.0900 0.00 0.14 0.00 -0.15
11 0.0902 0.00 0.14 0.00 -0.19
12 0.1636 0.00 0.18 0.00 -0.12
13 0.1744 0.00 -0.02 0.00 0.25
14 0.1852 0.00 0.02 0.00 -0.08
15 0.1962 0.00 -0.07 0.00 0.09
16 0.1964 0.00 -0.13 0.00 -0.03
17 0.1965 0.00 -0.17 0.00 0.10
18 0.1967 0.00 -0.02 0.00 0.00
19 0.1968 0.00 -0.08 0.00 -0.02
20 0.2405 0.00 -0.03 0.00 -0.01
21 4.0594 0.00 0.16 0.00 0.17
22 4.0595 0.00 -0.19 0.00 0.09
23 4.0622 0.00 -0.01 0.00 0.08
24 4.2316 0.00 0.02 0.00 -0.06
25 4.2318 0.00 0.22 0.00 0.04
26 5.9979 0.00 -0.05 0.00 0.27
27 5.9981 0.00 0.13 0.00 0.12
28 5.9984 0.00 0.12 0.00 0.41
29 13.1325 0.00 0.14 0.00 -0.32
30 13.1326 0.00 -0.19 0.00 0.06
31 13.1328 0.00 -0.10 0.00 -0.21
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.
09DL143 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.384 43.384 43.384 ecceobj 0.050 0.050 0.050 incobj 11.014 11.014 11.014 qmin 40.410 40.414 40.395 qmax 47.026 47.002 46.965 amean 43.603 43.603 43.603 amin 43.272 43.264 43.270 amax 43.952 43.952 43.954 emean 0.055 0.055 0.055 emin 0.039 0.039 0.039 emax 0.070 0.070 0.069 imean 9.422 9.422 9.422 imin 8.868 8.869 8.868 imax 10.059 10.057 10.060 excite_mean 0.173 0.173 0.173 fracstop 1.000 1.000 1.000 cjmean 3.061 3.061 3.061 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 174.7 174.8 174.7 kozaiamp 179.9 180.0 179.9