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: 09DN143 # Created Thu Apr 25 01:13:04 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 25 observations of 25 # Arc: 8.11y # First observation: 2009/02/18 # Last observation: 2017/04/01 # Chi-squared of fit: 8.67 DOF: 44 RMS: 0.10 # Min/Max residuals: -0.33 0.27 # Exact a, adot, b, bdot, g, gdot: 1.886880E-05 3.684671E-02 1.436700E-07 -4.662691E-05 3.122477E-02 -3.372618E-03 # Covariance matrix: 1.0468E-13 -1.4207E-14 -3.9582E-16 -1.1255E-16 6.9077E-14 -1.6882E-14 -1.4207E-14 1.2231E-13 -8.7560E-16 7.9912E-17 1.0741E-13 4.1150E-13 -3.9582E-16 -8.7560E-16 8.9469E-14 -1.2928E-14 -2.6740E-15 -2.7426E-15 -1.1255E-16 7.9912E-17 -1.2928E-14 5.0635E-15 -4.4252E-16 3.7150E-16 6.9077E-14 1.0741E-13 -2.6740E-15 -4.4252E-16 4.2279E-13 3.1972E-13 -1.6882E-14 4.1150E-13 -2.7426E-15 3.7150E-16 3.1972E-13 1.4543E-12 # lat0 lon0 xBary yBary zBary JD0 10.827135 -174.428104 0.580300 0.151310 -0.791120 2454881.106123 # Heliocentric elements and errors Epoch: 2454880.5000 = 2009/02/18 Mean Anomaly: 332.95535 +/- 0.009 Argument of Peri: 129.56937 +/- 0.013 Long of Asc Node: 95.13346 +/- 0.001 Inclination: 10.56253 +/- 0.000 Eccentricity: 0.19833328 +/- 0.0001 Semi-Major Axis: 39.34415955 +/- 0.0039 Time of Perihelion: 2461652.2002 +/- 12.6 Perihelion: 31.54090352 +/- 0.0039 Aphelion: 47.14741558 +/- 0.0053 Period (y) 246.7906 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -32.16267340 +/- 0.0007 Ecliptic Y -2.55979940 +/- 0.0001 Ecliptic Z 6.01596620 +/- 0.0001 Ecliptic XDOT 0.00060735 +/- 0.0000 Ecliptic YDOT -0.00318412 +/- 0.0000 Ecliptic ZDOT -0.00005967 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 32.82051658 +/- 0.0006 Geocenter to KBO 32.02594215 +/- 0.0007 # Hcoef: 8.67
The following table shows the complete astrometric record for 09DN143. 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 (09DN143) followed by the observatory code and reference code for the source of the astrometry.
2009 02 18.605357 12 37 41.261 +07 43 28.48 24.1i 09DN143 568 C~0aRQ 2009 02 18.616290 12 37 41.215 +07 43 28.91 09DN143 568 C~0aRQ 2009 02 18.642926 12 37 41.119 +07 43 29.91 24.2i 09DN143 568 C~0aRQ 2009 02 18.654165 12 37 41.062 +07 43 30.35 09DN143 568 C~0aRQ 2009 02 18.660833 12 37 41.041 +07 43 30.60 09DN143 568 C~0aRQ 2009 02 19.513809 12 37 37.646 +07 44 04.13 09DN143 568 C~0aRQ 2009 02 22.512819 12 37 25.223 +07 46 03.04 23.6i 09DN143 568 C~0aRQ 2009 02 22.558177 12 37 25.025 +07 46 04.92 24.3g 09DN143 568 C~0aRQ 2009 02 22.614326 12 37 24.780 +07 46 07.16 24.3g 09DN143 568 C~0aRQ 2009 02 23.506411 12 37 20.956 +07 46 42.81 24.2g 09DN143 568 C~0aRQ 2009 02 23.561890 12 37 20.714 +07 46 45.01 24.1g 09DN143 568 C~0aRQ 2009 02 23.617499 12 37 20.467 +07 46 47.25 24.2g 09DN143 568 C~0aRQ 2009 02 28.428961 12 36 58.809 +07 50 00.97 09DN143 568 C~0aRQ 2009 03 25.428002 12 34 47.794 +08 06 25.59 09DN143 568 C~0aRQ 2009 03 25.454983 12 34 47.642 +08 06 26.55 09DN143 568 C~0aRQ 2009 05 01.306211 12 31 32.487 +08 23 25.77 09DN143 568 C~0aRQ 2013 05 14.18981 13 02 02.24 +04 59 10.1 23.2R 09DN143 G37 C~1T0w 2013 05 14.26197 13 02 01.93 +04 59 11.0 09DN143 G37 C~1T0w 2015 02 18.34987 13 25 00.55 +02 25 21.6 23.3R 09DN143 695 C~1T0w 2015 02 18.44328 13 25 00.27 +02 25 24.7 09DN143 695 C~1T0w 2015 02 18.53368 13 25 00.01 +02 25 28.0 09DN143 695 C~1T0w 2017 04 01.43152 13 38 02.46 +01 00 07.8 23.4r 09DN143 T09 C~7glo 2017 04 01.43431 13 38 02.44 +01 00 08.0 23.8r 09DN143 T09 C~7glo 2017 04 01.46601 13 38 02.24 +01 00 09.0 23.5r 09DN143 T09 C~7glo 2017 04 01.47677 13 38 02.20 +01 00 09.5 23.4r 09DN143 T09 C~7glo
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 -0.01
2 0.0000 0.00 -0.08 0.00 -0.01
3 0.0001 0.00 0.10 0.00 -0.05
4 0.0001 0.00 -0.08 0.00 -0.05
5 0.0002 0.00 0.01 0.00 -0.06
6 0.0025 0.00 -0.07 0.00 -0.05
7 0.0107 0.00 -0.06 0.00 -0.02
8 0.0108 0.00 -0.05 0.00 0.05
9 0.0110 0.00 -0.05 0.00 0.06
10 0.0134 0.00 -0.07 0.00 0.05
11 0.0136 0.00 -0.01 0.00 0.03
12 0.0137 0.00 -0.01 0.00 0.05
13 0.0269 0.00 0.05 0.00 0.00
14 0.0953 0.00 0.06 0.00 -0.02
15 0.0954 0.00 0.09 0.00 -0.06
16 0.1963 0.00 0.18 0.00 -0.18
17 4.2316 0.00 -0.04 0.00 0.24
18 4.2318 0.00 0.04 0.00 0.27
19 5.9979 0.00 0.21 0.00 -0.10
20 5.9982 0.00 0.05 0.00 -0.12
21 5.9984 0.00 0.09 0.00 0.17
22 8.1145 0.00 0.06 0.00 -0.08
23 8.1145 0.00 -0.01 0.00 0.02
24 8.1146 0.00 -0.33 0.00 -0.12
25 8.1146 0.00 -0.02 0.00 -0.01
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.
09DN143 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.179 39.178 39.179 ecceobj 0.194 0.194 0.194 incobj 10.559 10.559 10.559 qmin 30.742 30.739 30.744 qmax 48.982 49.010 48.938 amean 39.456 39.456 39.456 amin 38.972 38.958 38.956 amax 40.022 40.029 40.020 emean 0.203 0.203 0.203 emin 0.182 0.182 0.182 emax 0.224 0.224 0.224 imean 8.853 8.851 8.858 imin 8.244 8.244 8.244 imax 9.663 9.655 9.690 excite_mean 0.255 0.255 0.255 fracstop 1.000 1.000 1.000 cjmean 2.978 2.978 2.978 libcent 0 180.0 180.3 180.4 libamp 0 107.8 107.5 106.8 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 180.9 181.2 179.9 kozaiamp 180.0 180.0 180.0