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: 202421 # Created Thu May 24 01:36:52 2012 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 59 observations of 59 # Arc: 21.28y # First observation: 1990/09/15 # Last observation: 2011/12/26 # Chi-squared of fit: 330.90 DOF: 112 RMS: 0.42 # Min/Max residuals: -1.19 1.09 # Exact a, adot, b, bdot, g, gdot: 1.011592E-05 1.624431E-02 3.568083E-06 4.943173E-03 2.056213E-02 -4.113692E-04 # Covariance matrix: 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 # lat0 lon0 xBary yBary zBary JD0 20.039179 -4.356725 0.057555 0.344277 -0.943806 2448149.802402 # Heliocentric elements and errors Epoch: 2448150.5000 = 1990/09/16 Mean Anomaly: 192.99506 +/- 0.000 Argument of Peri: 220.90134 +/- 0.000 Long of Asc Node: 307.85859 +/- 0.000 Inclination: 25.75448 +/- 0.000 Eccentricity: 0.14745797 +/- 0.0000 Semi-Major Axis: 43.31494994 +/- 0.0000 Time of Perihelion: 2496454.3735 +/- 0.0 Perihelion: 36.92781523 +/- 0.0000 Aphelion: 49.70208465 +/- 0.0000 Period (y) 285.0788 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 46.55342813 +/- 0.0000 Ecliptic Y -3.60453106 +/- 0.0000 Ecliptic Z 16.66493071 +/- 0.0000 Ecliptic XDOT -0.00011669 +/- 0.0000 Ecliptic YDOT 0.00217543 +/- 0.0000 Ecliptic ZDOT 0.00059965 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 49.57757627 +/- 0.0000 Geocenter to KBO 48.63314975 +/- 0.0000 # Hcoef: 3.73
The following table shows the complete astrometric record for 202421. 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 (202421) followed by the observatory code and reference code for the source of the astrometry.
1990 09 15.30174 23 11 22.52 +16 37 06.8 202421 261 x0930 1991 10 03.25035 23 13 14.70 +17 08 00.1 202421 261 x0930 1992 09 26.28194 23 16 43.07 +17 49 15.8 202421 261 x0930 2001 08 22.34931 23 48 12.85 +23 37 07.8 20.5R 202421 644 Cx0930 2001 09 21.27441 23 46 08.72 +23 30 37.2 20.4R 202421 644 Cx0930 2001 09 26.20079 23 45 47.49 +23 28 42.4 19.7R 202421 644 Cx0930 2001 09 30.44927 23 45 29.37 +23 26 55.1 19.9R 202421 644 Cx0930 2002 08 22.47770 23 51 36.89 +24 13 41.9 19.6R 202421 644 Cx0930 2002 10 15.19649 23 47 52.99 +23 56 51.3 21.2R 202421 644 Cx0930 2002 11 01.10292 23 46 53.79 +23 47 25.0 20.5R 202421 644 Cx0930 2005 10 21.14487 23 57 49.34 +25 42 56.0 20.5R 202421 644 Cv4453 2005 10 21.21031 23 57 49.07 +25 42 54.0 21.2R 202421 644 Cv4453 2005 10 21.27688 23 57 48.77 +25 42 51.7 20.8R 202421 644 Cv4453 2005 10 22.10820 23 57 45.66 +25 42 24.2 21.0R 202421 644 Cv4453 2005 10 22.18315 23 57 45.36 +25 42 22.0 20.8R 202421 644 Cv4453 2005 10 22.25532 23 57 45.10 +25 42 19.2 20.9R 202421 644 Cv4453 2005 10 23.09975 23 57 41.95 +25 41 51.2 20.9R 202421 644 Cv4453 2005 10 23.16858 23 57 41.70 +25 41 48.7 20.9R 202421 644 Cv4453 2005 10 23.23392 23 57 41.44 +25 41 46.9 21.0R 202421 644 Cv4453 2005 10 24.10087 23 57 38.24 +25 41 17.5 20.6R 202421 644 Cv4453 2005 10 24.16436 23 57 38.01 +25 41 15.5 20.8R 202421 644 Cv4453 2005 10 24.23280 23 57 37.75 +25 41 13.1 20.8R 202421 644 Cv4453 2005 10 26.27668 23 57 30.34 +25 40 03.5 20.8R 202421 644 Cv4453 2005 10 26.34425 23 57 30.09 +25 40 01.0 20.5R 202421 644 Cv4453 2005 10 26.41324 23 57 29.86 +25 39 58.6 21.1R 202421 644 Cv4453 2005 11 04.11249 23 57 00.78 +25 34 53.1 20.4R 202421 644 Cv4453 2005 11 04.12544 23 57 00.74 +25 34 52.7 20.3R 202421 644 Cv4453 2005 11 04.13956 23 57 00.70 +25 34 52.2 20.2R 202421 644 Cv4453 2005 11 30.12244 23 56 03.93 +25 19 33.5 20.3R 202421 644 Cv4453 2005 11 30.17370 23 56 03.87 +25 19 31.8 20.1R 202421 644 Cv4453 2006 09 15.13471 00 03 56.91 +26 34 11.4 202421 644 Cv4453 2006 09 16.35403 00 03 51.51 +26 33 52.4 202421 644 Cv4453 2006 09 16.40442 00 03 51.26 +26 33 50.8 202421 644 Cv4453 2006 09 23.44206 00 03 20.08 +26 31 41.7 202421 644 Cv4453 2006 09 25.18097 00 03 12.36 +26 31 04.8 202421 644 Cv4453 2006 09 26.30865 00 03 07.33 +26 30 40.2 202421 644 Cv4453 2007 10 06.81962 00 05 57.69 +27 02 07.3 20.3V 202421 A74 Cv8684 2007 10 06.85365 00 05 57.53 +27 02 06.3 20.6V 202421 A74 Cv8684 2007 10 06.89118 00 05 57.34 +27 02 05.9 20.6V 202421 A74 Cv8684 2007 10 31.80624 00 04 18.01 +26 48 53.0 20.6V 202421 A74 Cw3471 2007 10 31.83061 00 04 17.93 +26 48 52.4 20.5V 202421 A74 Cw3471 2007 10 31.85534 00 04 17.81 +26 48 51.1 20.5V 202421 A74 Cw3471 2008 07 30.00161 00 13 55.30 +27 43 31.5 20.5V 202421 A74 Cz2941 2008 07 30.02868 00 13 55.24 +27 43 31.8 20.6V 202421 A74 Cz2941 2008 07 30.05575 00 13 55.18 +27 43 32.1 20.5V 202421 A74 Cz2941 2008 08 29.96319 00 12 18.00 +27 47 18.2 20.3V 202421 A74 Cz5229 2008 08 29.99567 00 12 17.92 +27 47 17.9 20.2V 202421 A74 Cz5229 2008 08 30.02852 00 12 17.82 +27 47 17.4 19.9V 202421 A74 Cz5229 2008 11 29.76024 00 06 39.14 +27 06 30.0 20.2V 202421 A74 C~01xa 2008 11 29.77711 00 06 39.12 +27 06 29.3 20.2V 202421 A74 C~01xa 2008 11 29.79585 00 06 39.07 +27 06 28.6 20.1V 202421 A74 C~01xa 2009 08 25.94225 00 16 16.82 +28 22 11.8 19.3R 202421 561 C~08vu 2009 08 25.94687 00 16 16.74 +28 22 12.7 20.1R 202421 561 C~08vu 2009 08 25.95081 00 16 16.66 +28 22 13.0 19.5R 202421 561 C~08vu 2010 10 03.06337 00 17 19.18 +28 49 16.2 202421 I15 C~0OK2 2010 10 09.09108 00 16 52.00 +28 46 43.8 202421 I15 C~0OK2 2010 10 11.14206 00 16 42.95 +28 45 46.6 202421 I15 C~0OK2 2011 12 26.07478 00 17 27.02 +28 37 30.2 20.4R 202421 688 C~0buU 2011 12 26.21934 00 17 27.11 +28 37 26.2 202421 688 C~0buU
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 -1.19 2 1.0485 0.00 -0.22 0.00 0.11 3 2.0314 0.00 -0.30 0.00 -0.02 4 10.9351 0.00 -0.25 0.00 -0.41 5 11.0170 0.00 0.09 0.00 0.15 6 11.0305 0.00 0.08 0.00 -0.64 7 11.0422 0.00 0.10 0.00 -0.27 8 11.9348 0.00 -0.12 0.00 0.03 9 12.0818 0.00 -1.10 0.00 0.46 10 12.1281 0.00 0.17 0.00 0.02 11 15.0988 0.00 0.63 0.00 -0.22 12 15.0990 0.00 0.38 0.00 -0.07 13 15.0992 0.00 -0.24 0.00 -0.17 14 15.1015 0.00 0.19 0.00 -0.07 15 15.1017 0.00 0.00 0.00 0.21 16 15.1019 0.00 0.25 0.00 -0.19 17 15.1042 0.00 0.30 0.00 0.08 18 15.1044 0.00 0.45 0.00 -0.13 19 15.1045 0.00 0.27 0.00 0.26 20 15.1069 0.00 0.28 0.00 0.09 21 15.1071 0.00 0.39 0.00 0.22 22 15.1073 0.00 0.33 0.00 0.13 23 15.1129 0.00 0.43 0.00 0.16 24 15.1131 0.00 0.36 0.00 -0.01 25 15.1132 0.00 0.65 0.00 -0.02 26 15.1371 0.00 -0.23 0.00 -0.35 27 15.1371 0.00 -0.22 0.00 -0.29 28 15.1371 0.00 -0.16 0.00 -0.29 29 15.2083 0.00 -0.07 0.00 0.06 30 15.2084 0.00 -0.01 0.00 0.09 31 15.9995 0.00 0.84 0.00 -0.01 32 16.0029 0.00 0.34 0.00 0.33 33 16.0030 0.00 -0.03 0.00 -0.44 34 16.0223 0.00 0.15 0.00 0.41 35 16.0270 0.00 0.17 0.00 0.12 36 16.0301 0.00 0.07 0.00 0.14 37 17.0582 0.00 0.31 0.00 0.57 38 17.0583 0.00 0.16 0.00 0.48 39 17.0584 0.00 -0.20 0.00 1.09 40 17.1266 0.00 -0.26 0.00 -0.32 41 17.1267 0.00 -0.18 0.00 -0.07 42 17.1268 0.00 -0.68 0.00 -0.49 43 17.8719 0.00 0.19 0.00 0.52 44 17.8719 0.00 0.18 0.00 0.32 45 17.8720 0.00 0.18 0.00 0.13 46 17.9566 0.00 -0.37 0.00 0.35 47 17.9567 0.00 0.38 0.00 0.16 48 17.9568 0.00 0.85 0.00 -0.22 49 18.2080 0.00 -0.52 0.00 0.26 50 18.2080 0.00 -0.44 0.00 0.15 51 18.2081 0.00 -0.77 0.00 0.11 52 18.9449 0.00 0.74 0.00 -1.03 53 18.9450 0.00 -0.19 0.00 -0.13 54 18.9450 0.00 -1.17 0.00 0.17 55 20.0486 0.00 -0.70 0.00 -0.61 56 20.0651 0.00 -0.97 0.00 0.14 57 20.0707 0.00 0.03 0.00 -0.75 58 21.2780 0.00 0.58 0.00 0.26 59 21.2784 0.00 0.88 0.00 0.37
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.
202421 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 43.624 43.624 43.624 ecceobj 0.140 0.140 0.140 incobj 25.712 25.712 25.712 qmin 36.109 36.105 36.126 qmax 51.001 51.009 50.993 amean 43.403 43.403 43.403 amin 43.050 43.043 43.050 amax 43.804 43.791 43.795 emean 0.149 0.149 0.149 emin 0.133 0.133 0.133 emax 0.165 0.165 0.165 imean 27.154 27.154 27.153 imin 26.698 26.691 26.703 imax 27.554 27.569 27.553 excite_mean 0.480 0.480 0.480 fracstop 1.000 1.000 1.000 cjmean 2.805 2.805 2.805 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 180.1 180.1 180.2 kozaiamp 179.9 179.9 179.9