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: 169071 # Created Fri May 2 02:36:24 2008 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 14 observations of 14 # Arc: 6.29y # First observation: 2001/03/26 # Last observation: 2007/07/12 # Chi-squared of fit: 53.82 DOF: 22 RMS: 0.35 # Min/Max residuals: -0.55 0.79 # Exact a, adot, b, bdot, g, gdot: 2.013126E-05 3.307456E-02 1.529325E-06 2.584002E-04 2.964514E-02 -4.854991E-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 -5.781417 -157.654122 0.281508 -0.097057 -0.956913 2451994.874613 # Heliocentric elements and errors Epoch: 2451995.5000 = 2001/03/27 Mean Anomaly: 315.38296 +/- 0.000 Argument of Peri: 336.93140 +/- 0.000 Long of Asc Node: 287.37129 +/- 0.000 Inclination: 5.63927 +/- 0.000 Eccentricity: 0.18788419 +/- 0.0000 Semi-Major Axis: 39.07859779 +/- 0.0000 Time of Perihelion: 2463054.2274 +/- 0.0 Perihelion: 31.73634694 +/- 0.0000 Aphelion: 46.42084864 +/- 0.0000 Period (y) 244.2962 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -32.03296885 +/- 0.0000 Ecliptic Y -12.86042981 +/- 0.0000 Ecliptic Z -3.39789865 +/- 0.0000 Ecliptic XDOT 0.00156337 +/- 0.0000 Ecliptic YDOT -0.00265362 +/- 0.0000 Ecliptic ZDOT 0.00006910 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 34.68506518 +/- 0.0000 Geocenter to KBO 33.73245432 +/- 0.0000 # Hcoef: 7.99
The following table shows the complete astrometric record for 169071. 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 (169071) followed by the observatory code and reference code for the source of the astrometry.
2001 03 26.37387 13 13 47.70 -14 03 24.9 24.5R 169071 695 Cd1722 2001 03 26.45371 13 13 47.27 -14 03 22.5 169071 695 Cd1722 2001 04 29.33189 13 10 44.78 -13 45 08.2 22.7R 169071 695 Cd1722 2001 04 29.37843 13 10 44.50 -13 45 06.2 169071 695 Cd1722 2001 05 22.04014 13 09 03.01 -13 32 53.3 23.1R 169071 807 Cd1722 2001 05 22.15008 13 09 02.61 -13 32 50.4 169071 807 Cd1722 2002 04 06.17600 13 20 08.96 -14 40 16.8 21.8R 169071 807 Cf4616 2002 04 06.31099 13 20 08.22 -14 40 13.2 169071 807 Cf4616 2002 04 07.20541 13 20 03.29 -14 39 45.2 169071 807 Cf4616 2003 04 29.41468 13 25 27.89 -15 09 37.0 23.0R 169071 568 Ch9859 2003 04 29.44264 13 25 27.77 -15 09 36.0 169071 568 Ch9859 2003 04 30.45411 13 25 22.38 -15 09 01.9 169071 568 Ch9859 2007 07 11.97477 13 52 09.95 -17 20 28.3 169071 304 Cv1971 2007 07 12.06139 13 52 09.96 -17 20 27.1 169071 304 Cv1971
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 0.00 0.00 0.46 2 0.0002 0.00 -0.55 0.00 0.04 3 0.0930 0.00 0.61 0.00 -0.47 4 0.0931 0.00 0.01 0.00 -0.06 5 0.1551 0.00 -0.24 0.00 0.11 6 0.1554 0.00 0.06 0.00 -0.26 7 1.0289 0.00 0.54 0.00 0.27 8 1.0293 0.00 0.79 0.00 -0.30 9 1.0317 0.00 0.68 0.00 -0.03 10 2.0918 0.00 -0.44 0.00 0.19 11 2.0919 0.00 0.04 0.00 0.25 12 2.0947 0.00 -0.20 0.00 0.29 13 6.2932 0.00 -0.16 0.00 -0.26 14 6.2935 0.00 0.12 0.00 -0.02
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.
169071 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 38.999 38.999 38.999 ecceobj 0.188 0.188 0.188 incobj 5.639 5.639 5.639 qmin 30.879 30.863 30.879 qmax 48.627 48.615 48.645 amean 39.456 39.456 39.456 amin 38.981 38.989 38.979 amax 40.023 40.017 40.008 emean 0.199 0.199 0.199 emin 0.181 0.180 0.180 emax 0.217 0.217 0.218 imean 7.451 7.451 7.451 imin 6.800 6.803 6.800 imax 8.124 8.123 8.125 fracstop 1.000 1.000 1.000 cjmean 2.987 2.987 2.987 libcent 0 179.9 179.1 180.0 libamp 0 98.3 99.4 98.5 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 185.5 185.7 185.4 kozaiamp 180.0 180.0 180.0