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: 49673 # Created Thu May 24 01:36:31 2012 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 23 observations of 23 # Arc: 3.06y # First observation: 1999/07/20 # Last observation: 2002/08/12 # Chi-squared of fit: 87.95 DOF: 40 RMS: 0.35 # Min/Max residuals: -1.15 0.91 # Exact a, adot, b, bdot, g, gdot: 1.420093E-05 2.157550E-02 -9.030052E-06 -8.929607E-03 2.411271E-02 -2.282472E-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 -1.095899 -44.670697 0.320937 -0.018635 -0.961627 2451379.946603 # Heliocentric elements and errors Epoch: 2451380.5000 = 1999/07/21 Mean Anomaly: 287.22374 +/- 0.000 Argument of Peri: 267.94354 +/- 0.000 Long of Asc Node: 132.31821 +/- 0.000 Inclination: 22.50265 +/- 0.000 Eccentricity: 0.10926167 +/- 0.0000 Semi-Major Axis: 43.34937109 +/- 0.0000 Time of Perihelion: 2472455.1256 +/- 0.0 Perihelion: 38.61294622 +/- 0.0000 Aphelion: 48.08579595 +/- 0.0000 Period (y) 285.4187 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 29.95438399 +/- 0.0000 Ecliptic Y -30.05323251 +/- 0.0000 Ecliptic Z -0.79353960 +/- 0.0000 Ecliptic XDOT 0.00152076 +/- 0.0000 Ecliptic YDOT 0.00194648 +/- 0.0000 Ecliptic ZDOT -0.00100872 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.43933799 +/- 0.0000 Geocenter to KBO 41.47199810 +/- 0.0000 # Hcoef: 7.38
The following table shows the complete astrometric record for 49673. 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 (49673) followed by the observatory code and reference code for the source of the astrometry.
1999 07 20.44586 21 12 31.26 -17 17 10.6 24.1R 49673 568 Cb9109 1999 07 20.48388 21 12 31.08 -17 17 11.3 49673 568 Cb9109 1999 07 20.51177 21 12 30.96 -17 17 12.1 49673 568 Cb9109 1999 09 13.16523 21 08 27.59 -17 39 36.8 23.4R 49673 695 Ca8546 1999 09 13.18035 21 08 27.53 -17 39 37.2 23.6R 49673 695 Ca8546 1999 09 13.19539 21 08 27.50 -17 39 37.6 23.3R 49673 695 Ca8546 1999 09 14.16945 21 08 23.98 -17 39 57.5 49673 695 Ca8546 1999 09 14.18270 21 08 23.92 -17 39 57.4 49673 695 Ca8546 1999 09 14.19575 21 08 23.90 -17 39 57.7 49673 695 Ca8546 2000 08 01.19412 21 17 10.62 -17 29 45.5 22.8R 49673 807 Ch2983 2000 08 01.26710 21 17 10.28 -17 29 47.5 49673 807 Ch2983 2000 08 07.23483 21 16 42.21 -17 32 26.9 23.1R 49673 809 Cb9109 2000 08 07.29626 21 16 41.92 -17 32 28.4 23.1R 49673 809 Cb9109 2000 08 07.36306 21 16 41.63 -17 32 30.2 23.4R 49673 809 Cb9109 2000 08 08.17276 21 16 37.79 -17 32 51.8 23.6R 49673 809 Cb9109 2000 08 08.22057 21 16 37.55 -17 32 53.1 23.6R 49673 809 Cb9109 2000 08 08.26797 21 16 37.32 -17 32 54.3 23.4R 49673 809 Cb9109 2001 06 27.32590 21 25 10.83 -17 21 27.6 49673 304 Cd2245 2001 06 28.29190 21 25 07.75 -17 21 49.3 49673 304 Cd2245 2001 06 28.41092 21 25 07.36 -17 21 51.8 49673 304 Cd2245 2002 08 11.17743 21 27 43.88 -17 46 55.6 21.7R 49673 807 Cg2701 2002 08 12.09986 21 27 39.54 -17 47 20.9 49673 807 Cg2701 2002 08 12.19550 21 27 39.07 -17 47 23.7 49673 807 Cg2701
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 -0.20 0.00 -1.15 2 0.0001 0.00 -0.29 0.00 0.91 3 0.0002 0.00 -0.21 0.00 0.82 4 0.1498 0.00 -0.17 0.00 -0.10 5 0.1499 0.00 -0.22 0.00 -0.20 6 0.1499 0.00 0.18 0.00 -0.29 7 0.1526 0.00 0.44 0.00 -0.72 8 0.1526 0.00 0.28 0.00 -0.35 9 0.1526 0.00 0.70 0.00 -0.39 10 1.0342 0.00 -0.06 0.00 -0.21 11 1.0344 0.00 0.04 0.00 -0.26 12 1.0508 0.00 -0.05 0.00 -0.09 13 1.0509 0.00 0.02 0.00 0.04 14 1.0511 0.00 0.46 0.00 0.00 15 1.0533 0.00 0.01 0.00 0.01 16 1.0535 0.00 -0.14 0.00 -0.02 17 1.0536 0.00 -0.18 0.00 0.04 18 1.9381 0.00 0.21 0.00 0.17 19 1.9407 0.00 0.05 0.00 0.05 20 1.9410 0.00 0.08 0.00 0.22 21 3.0602 0.00 -0.10 0.00 -0.02 22 3.0627 0.00 0.18 0.00 0.16 23 3.0630 0.00 0.03 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.
49673 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 43.284 43.284 43.284 ecceobj 0.109 0.109 0.109 incobj 22.520 22.520 22.520 qmin 38.435 38.436 38.435 qmax 48.007 48.004 48.013 amean 43.202 43.202 43.202 amin 43.178 43.178 43.179 amax 43.234 43.234 43.236 emean 0.103 0.103 0.103 emin 0.096 0.096 0.096 emax 0.111 0.111 0.111 imean 21.253 21.253 21.253 imin 20.866 20.866 20.867 imax 21.585 21.584 21.584 excite_mean 0.377 0.377 0.377 fracstop 1.000 1.000 1.000 cjmean 2.918 2.918 2.918 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 178.1 178.0 178.1 kozaiamp 180.0 180.0 180.0