The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory.
# Object: 55638
# Created Fri May 2 02:36:18 2008
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 64 observations of 64
# Arc: 16.21y
# First observation: 1990/10/12
# Last observation: 2006/12/27
# Chi-squared of fit: 364.66 DOF: 122 RMS: 0.42
# Min/Max residuals: -1.04 1.67
# Exact a, adot, b, bdot, g, gdot:
1.935855E-05 4.516675E-02 -5.377673E-06 -1.321563E-02 3.594149E-02 -5.420082E-03
# 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
0.784094 17.162998 -0.029692 0.013692 -0.998478 2448176.813512
# Heliocentric elements and errors
Epoch: 2448175.5000 = 1990/10/11
Mean Anomaly: 343.90695 +/- 0.000
Argument of Peri: 207.21956 +/- 0.000
Long of Asc Node: 199.80608 +/- 0.000
Inclination: 16.33061 +/- 0.000
Eccentricity: 0.28984709 +/- 0.0000
Semi-Major Axis: 39.36880941 +/- 0.0000
Time of Perihelion: 2452208.8214 +/- 0.0
Perihelion: 27.95787445 +/- 0.0000
Aphelion: 50.77974438 +/- 0.0000
Period (y) 247.0226 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 27.52591724 +/- 0.0000
Ecliptic Y 8.53251006 +/- 0.0000
Ecliptic Z 0.38062311 +/- 0.0000
Ecliptic XDOT -0.00140125 +/- 0.0000
Ecliptic YDOT 0.00316708 +/- 0.0000
Ecliptic ZDOT -0.00101218 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 28.82062701 +/- 0.0000
Geocenter to KBO 27.82310151 +/- 0.0000
# Hcoef: 5.68
The following table shows the complete astrometric record for 55638. 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 (55638) followed by the observatory code and reference code for the source of the astrometry.
1990 10 12.31285 01 02 04.30 +07 27 54.9 55638 261 g8284 1996 08 19.63013 02 12 31.10 +09 26 40.7 55638 566 Cg8284 1997 10 30.40006 02 18 24.67 +08 53 30.9 55638 566 Cg8284 1997 11 26.44338 02 15 37.75 +08 36 55.8 19.5R 55638 566 Cg8284 2000 08 04.61215 02 57 19.09 +10 03 35.2 19.5R 55638 608 Cg8284 2000 08 04.62267 02 57 19.10 +10 03 34.8 19.8R 55638 608 Cg8284 2001 09 27.44000 03 07 47.86 +09 45 21.4 19.6R 55638 644 Cg8284 2001 10 10.52424 03 06 44.74 +09 37 04.8 55638 644 Cg8284 2001 10 19.47146 03 05 53.33 +09 31 14.7 55638 644 Cg8284 2001 10 24.51329 03 05 22.17 +09 27 57.7 55638 644 Cg8284 2001 12 18.09655 02 59 43.36 +09 00 31.5 55638 644 Cg8284 2002 01 02.22110 02 58 43.60 +08 57 45.9 55638 644 Cg8284 2002 01 05.24405 02 58 34.86 +08 57 32.6 55638 608 Cg8284 2002 01 11.27832 02 58 21.02 +08 57 24.4 55638 608 Cg8284 2002 09 16.54117 03 19 55.15 +09 55 23.2 55638 608 Cg8284 2002 09 21.55128 03 19 40.60 +09 52 34.8 55638 608 Cg8284 2002 09 29.61311 03 19 11.14 +09 47 48.0 55638 608 Cg8284 2002 11 14.29471 03 14 43.56 +09 19 33.3 19.5 55638 644 Cg6507 2002 11 14.36703 03 14 43.07 +09 19 30.8 55638 644 Cg6507 2002 11 14.42920 03 14 42.63 +09 19 28.6 55638 644 Cg6507 2002 11 15.30863 03 14 36.68 +09 19 00.0 55638 675 Cg6507 2002 11 15.35874 03 14 36.38 +09 18 57.9 55638 675 Cg6507 2002 11 22.39499 03 13 49.26 +09 15 14.9 19.5 55638 644 Cj0809 2002 11 22.41537 03 13 49.07 +09 15 14.8 55638 644 Cj0809 2002 11 22.43604 03 13 48.93 +09 15 13.7 55638 644 Cj0809 2002 12 08.80794 03 12 05.88 +09 08 05.9 19.6R 55638 540 Cg8284 2002 12 08.86569 03 12 05.58 +09 08 04.6 19.5R 55638 540 Cg8284 2002 12 08.94539 03 12 05.07 +09 08 03.1 19.2R 55638 621 Cg8284 2002 12 08.95693 03 12 04.99 +09 08 02.7 19.4R 55638 621 Cg8284 2002 12 08.96847 03 12 04.95 +09 08 02.4 19.4R 55638 621 Cg8284 2002 12 10.97744 03 11 53.35 +09 07 20.7 19.5R 55638 621 Cg8284 2002 12 10.98899 03 11 53.33 +09 07 20.7 19.4R 55638 621 Cg8284 2003 01 08.81588 03 09 49.59 +09 02 06.1 55638 246 Ch0044 2003 01 08.81714 03 09 49.62 +09 02 06.0 55638 246 Ch0044 2003 01 08.81836 03 09 49.60 +09 02 06.7 55638 246 Ch0044 2003 01 08.82022 03 09 49.60 +09 02 06.2 55638 246 Ch0044 2003 01 08.82182 03 09 49.60 +09 02 05.7 55638 246 Ch0044 2003 01 20.74851 03 09 27.70 +09 02 43.7 55638 246 Ch1645 2003 01 20.75036 03 09 27.72 +09 02 43.7 55638 246 Ch1645 2003 01 20.75219 03 09 27.71 +09 02 43.7 55638 246 Ch1645 2003 01 20.75304 03 09 27.72 +09 02 44.8 55638 246 Ch1645 2003 01 20.75391 03 09 27.63 +09 02 44.9 55638 246 Ch1645 2003 11 21.32980 03 25 33.16 +09 18 45.2 20.1V 55638 691 Cj3308 2003 11 21.35658 03 25 32.97 +09 18 44.5 20.1V 55638 691 Cj3308 2003 11 21.38348 03 25 32.77 +09 18 43.6 20.5V 55638 691 Cj3308 2003 12 12.98286 03 23 15.12 +09 09 50.7 19.9V 55638 941 Cj4303 2003 12 12.98399 03 23 15.12 +09 09 50.7 19.9V 55638 941 Cj4303 2003 12 13.87833 03 23 09.86 +09 09 34.2 19.9V 55638 941 Cj4303 2003 12 13.87946 03 23 09.86 +09 09 34.2 19.9V 55638 941 Cj4303 2004 12 14.18764 03 34 33.54 +09 10 55.2 20.2R 55638 918 Cm3170 2004 12 14.20847 03 34 33.45 +09 10 54.5 20.1R 55638 918 Cm3170 2004 12 14.26402 03 34 33.08 +09 10 53.4 20.8R 55638 918 Cm3170 2004 12 14.28332 03 34 32.96 +09 10 53.0 21.1R 55638 918 Cm3170 2004 12 14.33406 03 34 32.68 +09 10 53.4 22.7R 55638 918 Cm3170 2004 12 14.35338 03 34 32.55 +09 10 50.6 21.0R 55638 918 Cm3170 2005 10 24.44813 03 51 34.29 +09 34 53.4 20.0R 55638 644 Co6815 2005 10 24.47034 03 51 34.16 +09 34 52.4 19.8R 55638 644 Co6815 2005 10 24.49381 03 51 33.99 +09 34 52.1 20.0R 55638 644 Co6815 2006 11 23.35735 03 59 48.61 +09 17 27.2 19.8R 55638 850 Ct4348 2006 11 23.40299 03 59 48.28 +09 17 25.7 20.1R 55638 850 Ct4348 2006 11 24.23110 03 59 42.61 +09 17 04.8 19.7R 55638 850 Ct4348 2006 11 24.27781 03 59 42.30 +09 17 02.9 20.8R 55638 850 Ct4348 2006 12 27.91388 03 56 09.31 +09 07 24.6 55638 246 Ct4348 2006 12 27.91888 03 56 09.27 +09 07 24.0 55638 246 Ct4348
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 -0.22 0.00 -0.30 2 5.8544 0.00 -0.15 0.00 0.34 3 7.0502 0.00 -0.11 0.00 -0.32 4 7.1242 0.00 -0.28 0.00 -0.07 5 9.8133 0.00 0.30 0.00 0.12 6 9.8133 0.00 0.10 0.00 -0.16 7 10.9600 0.00 0.42 0.00 0.12 8 10.9958 0.00 0.22 0.00 0.07 9 11.0203 0.00 -0.40 0.00 -0.02 10 11.0341 0.00 -0.37 0.00 -0.14 11 11.1835 0.00 0.33 0.00 0.27 12 11.2249 0.00 0.06 0.00 0.05 13 11.2332 0.00 -0.55 0.00 0.46 14 11.2497 0.00 -0.24 0.00 0.21 15 11.9294 0.00 0.42 0.00 -0.17 16 11.9432 0.00 -0.65 0.00 -0.06 17 11.9652 0.00 0.28 0.00 -0.75 18 12.0903 0.00 0.38 0.00 0.13 19 12.0905 0.00 0.47 0.00 0.04 20 12.0907 0.00 0.25 0.00 -0.07 21 12.0931 0.00 -0.25 0.00 0.51 22 12.0932 0.00 0.40 0.00 0.07 23 12.1125 0.00 0.35 0.00 -0.24 24 12.1125 0.00 -0.45 0.00 0.27 25 12.1126 0.00 -0.47 0.00 -0.20 26 12.1574 0.00 0.00 0.00 -0.07 27 12.1576 0.00 0.64 0.00 -0.12 28 12.1578 0.00 0.04 0.00 0.11 29 12.1578 0.00 -0.13 0.00 -0.04 30 12.1579 0.00 0.29 0.00 -0.09 31 12.1634 0.00 -0.24 0.00 0.30 32 12.1634 0.00 0.46 0.00 0.54 33 12.2423 0.00 -0.24 0.00 -0.15 34 12.2423 0.00 0.26 0.00 -0.24 35 12.2423 0.00 0.01 0.00 0.46 36 12.2423 0.00 0.09 0.00 -0.04 37 12.2423 0.00 0.16 0.00 -0.54 38 12.2750 0.00 0.35 0.00 -0.53 39 12.2750 0.00 0.68 0.00 -0.55 40 12.2750 0.00 0.56 0.00 -0.56 41 12.2750 0.00 0.73 0.00 0.54 42 12.2750 0.00 -0.61 0.00 0.63 43 13.1089 0.00 0.19 0.00 -0.11 44 13.1089 0.00 0.10 0.00 0.00 45 13.1090 0.00 -0.14 0.00 -0.09 46 13.1682 0.00 0.96 0.00 -0.39 47 13.1682 0.00 1.06 0.00 -0.37 48 13.1706 0.00 -0.78 0.00 -0.39 49 13.1706 0.00 -0.68 0.00 -0.37 50 14.1735 0.00 -0.41 0.00 0.99 51 14.1736 0.00 0.11 0.00 0.64 52 14.1737 0.00 -0.47 0.00 0.48 53 14.1738 0.00 -0.54 0.00 0.41 54 14.1739 0.00 -0.21 0.00 1.67 55 14.1740 0.00 -0.45 0.00 -0.81 56 15.0339 0.00 0.32 0.00 0.22 57 15.0340 0.00 0.33 0.00 0.02 58 15.0340 0.00 -0.16 0.00 0.56 59 16.1151 0.00 0.27 0.00 -0.04 60 16.1152 0.00 0.07 0.00 -0.33 61 16.1175 0.00 0.17 0.00 0.47 62 16.1176 0.00 0.41 0.00 -0.21 63 16.2097 0.00 0.08 0.00 -0.47 64 16.2097 0.00 -0.12 0.00 -1.04
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.
55638 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.763 39.763 39.763 ecceobj 0.296 0.296 0.296 incobj 16.292 16.292 16.292 qmin 26.545 26.570 26.529 qmax 52.986 52.839 52.928 amean 39.453 39.453 39.453 amin 39.020 39.047 39.039 amax 39.976 39.956 39.968 emean 0.284 0.280 0.280 emin 0.253 0.199 0.202 emax 0.326 0.324 0.327 imean 16.508 16.695 16.700 imin 14.382 14.353 14.382 imax 17.828 20.220 20.166 fracstop 1.000 1.000 1.000 cjmean 2.867 2.867 2.867 libcent 0 180.2 179.3 179.4 libamp 0 63.7 63.7 65.3 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 168.3 164.2 165.4 kozaiamp 180.0 180.0 180.0