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: 168703 # Created Fri May 2 02:36:24 2008 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 18 observations of 18 # Arc: 7.27y # First observation: 2000/04/02 # Last observation: 2007/07/12 # Chi-squared of fit: 52.18 DOF: 30 RMS: 0.30 # Min/Max residuals: -0.42 1.20 # Exact a, adot, b, bdot, g, gdot: 1.685413E-05 2.902662E-02 -2.202906E-06 -2.492395E-03 2.749964E-02 -1.076508E-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 -0.261142 -153.312846 0.234993 -0.004688 -0.979219 2451637.033073 # Heliocentric elements and errors Epoch: 2451635.5000 = 2000/04/01 Mean Anomaly: 325.55217 +/- 0.000 Argument of Peri: 222.33302 +/- 0.000 Long of Asc Node: 23.37592 +/- 0.000 Inclination: 4.92912 +/- 0.000 Eccentricity: 0.07062165 +/- 0.0000 Semi-Major Axis: 39.57236890 +/- 0.0000 Time of Perihelion: 2460336.0331 +/- 0.0 Perihelion: 36.77770311 +/- 0.0000 Aphelion: 42.36703469 +/- 0.0000 Period (y) 248.9409 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -33.46356132 +/- 0.0000 Ecliptic Y -16.55856839 +/- 0.0000 Ecliptic Z -0.16579137 +/- 0.0000 Ecliptic XDOT 0.00138851 +/- 0.0000 Ecliptic YDOT -0.00252667 +/- 0.0000 Ecliptic ZDOT -0.00024753 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.33665129 +/- 0.0000 Geocenter to KBO 36.36417072 +/- 0.0000 # Hcoef: 6.48
The following table shows the complete astrometric record for 168703. 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 (168703) followed by the observatory code and reference code for the source of the astrometry.
2000 04 02.53233 13 38 39.03 -10 32 04.5 22.1R 168703 568 Cb7016 2000 04 02.56170 13 38 38.88 -10 32 03.7 22.2R 168703 568 Cb7016 2000 04 04.54941 13 38 28.93 -10 31 10.2 22.1R 168703 568 Cb7016 2000 04 04.59319 13 38 28.71 -10 31 09.1 22.2R 168703 568 Cb7016 2000 05 06.46338 13 35 47.81 -10 16 32.7 21.6R 168703 568 Cb7016 2000 05 06.50978 13 35 47.59 -10 16 31.6 21.5R 168703 568 Cb7016 2000 06 01.38243 13 34 01.99 -10 06 54.5 22.0R 168703 568 Cb7016 2000 06 01.43506 13 34 01.83 -10 06 53.5 22.0R 168703 568 Cb7016 2001 02 17.18222 13 47 31.79 -11 29 57.9 21.7R 168703 950 Cc6646 2001 02 17.22012 13 47 31.71 -11 29 57.6 21.4R 168703 950 Cc6646 2001 02 19.21293 13 47 27.51 -11 29 38.4 21.4R 168703 950 Cc6646 2001 05 25.23434 13 40 31.42 -10 53 08.9 21.6R 168703 675 Cd1264 2001 05 25.27879 13 40 31.26 -10 53 08.0 21.6R 168703 675 Cd1264 2002 05 05.28615 13 48 09.76 -11 44 54.3 22.4V 168703 291 Cf4462 2002 05 05.31832 13 48 09.64 -11 44 52.4 22.6V 168703 291 Cf4462 2002 05 05.33713 13 48 09.51 -11 44 53.5 22.8V 168703 291 Cf4462 2007 07 11.99266 14 15 45.60 -14 57 17.2 168703 304 Cv1967 2007 07 12.07591 14 15 45.53 -14 57 16.9 168703 304 Cv1967
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 -0.04 0.00 0.20 2 0.0001 0.00 0.06 0.00 0.15 3 0.0055 0.00 0.00 0.00 -0.01 4 0.0056 0.00 0.05 0.00 -0.10 5 0.0929 0.00 -0.07 0.00 -0.06 6 0.0930 0.00 -0.01 0.00 -0.17 7 0.1639 0.00 -0.37 0.00 -0.42 8 0.1640 0.00 -0.15 0.00 -0.36 9 0.8779 0.00 0.17 0.00 0.11 10 0.8780 0.00 0.16 0.00 0.07 11 0.8835 0.00 0.12 0.00 0.02 12 1.1436 0.00 0.37 0.00 -0.18 13 1.1437 0.00 0.62 0.00 -0.22 14 2.0883 0.00 -0.28 0.00 0.15 15 2.0884 0.00 0.35 0.00 1.20 16 2.0884 0.00 -0.18 0.00 -0.39 17 7.2730 0.00 -0.04 0.00 -0.08 18 7.2732 0.00 -0.03 0.00 -0.17
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.
168703 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 39.565 39.565 39.565 ecceobj 0.071 0.071 0.071 incobj 4.930 4.930 4.930 qmin 34.924 34.951 34.923 qmax 44.971 44.978 44.986 amean 39.813 39.813 39.813 amin 39.433 39.447 39.432 amax 40.182 40.186 40.181 emean 0.089 0.089 0.089 emin 0.057 0.057 0.057 emax 0.120 0.121 0.121 imean 11.891 11.891 11.892 imin 4.991 4.991 4.991 imax 15.706 15.696 15.706 fracstop 1.000 1.000 1.000 cjmean 2.991 2.991 2.991 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 180.1 180.0 180.2 kozaiamp 179.9 179.9 180.0