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: 160256 # Created Fri May 2 02:36:24 2008 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 15 observations of 15 # Arc: 6.88y # First observation: 2000/08/25 # Last observation: 2007/07/12 # Chi-squared of fit: 18.44 DOF: 24 RMS: 0.20 # Min/Max residuals: -0.61 0.37 # Exact a, adot, b, bdot, g, gdot: 1.387458E-05 2.039047E-02 -1.237597E-06 -8.433531E-04 2.251874E-02 -4.126128E-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 -4.383637 -15.305615 0.222567 -0.075294 -0.980065 2451781.712863 # Heliocentric elements and errors Epoch: 2451780.5000 = 2000/08/24 Mean Anomaly: 209.94119 +/- 0.000 Argument of Peri: 34.13213 +/- 0.000 Long of Asc Node: 103.64238 +/- 0.000 Inclination: 4.91090 +/- 0.000 Eccentricity: 0.05978414 +/- 0.0000 Semi-Major Axis: 43.12288864 +/- 0.0000 Time of Perihelion: 2494894.5873 +/- 0.0 Perihelion: 40.54482395 +/- 0.0000 Aphelion: 45.70095333 +/- 0.0000 Period (y) 283.1848 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 43.60220965 +/- 0.0000 Ecliptic Y -12.15706151 +/- 0.0000 Ecliptic Z -3.39431954 +/- 0.0000 Ecliptic XDOT 0.00059131 +/- 0.0000 Ecliptic YDOT 0.00241176 +/- 0.0000 Ecliptic ZDOT -0.00009825 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.39239886 +/- 0.0000 Geocenter to KBO 44.40750179 +/- 0.0000 # Hcoef: 5.99
The following table shows the complete astrometric record for 160256. 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 (160256) followed by the observatory code and reference code for the source of the astrometry.
2000 08 25.21212 23 10 29.08 -10 04 05.5 22.9R 160256 807 Ci4046 2000 08 25.27585 23 10 28.81 -10 04 07.6 160256 807 Ci4046 2002 08 10.42509 23 20 19.35 -09 07 33.4 22.1R 160256 807 Cg3357 2002 08 11.36606 23 20 16.07 -09 07 57.5 160256 807 Cg3357 2002 08 11.42412 23 20 15.87 -09 07 59.1 160256 807 Cg3357 2002 09 09.37564 23 18 21.29 -09 21 04.0 21.9R 160256 662 Cg3357 2002 09 09.44907 23 18 20.98 -09 21 05.3 160256 662 Cg3357 2003 08 23.26764 23 23 57.89 -08 47 58.2 22.0R 160256 807 Ci3361 2003 08 23.34923 23 23 57.55 -08 48 00.5 160256 807 Ci3361 2003 08 24.29352 23 23 53.86 -08 48 26.0 160256 807 Ci3361 2004 11 03.0443 23 23 51.79 -08 49 35.2 22.1R 160256 809 Cl8391 2007 07 11.31772 23 43 27.11 -06 49 34.7 160256 304 Cv1978 2007 07 11.41957 23 43 27.00 -06 49 36.2 160256 304 Cv1978 2007 07 12.30139 23 43 25.92 -06 49 48.7 160256 304 Cv1978 2007 07 12.42706 23 43 25.75 -06 49 50.5 160256 304 Cv1978
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 -0.06 0.00 -0.61 2 0.0002 0.00 -0.02 0.00 -0.19 3 1.9581 0.00 0.07 0.00 0.07 4 1.9607 0.00 0.04 0.00 0.21 5 1.9609 0.00 0.14 0.00 0.10 6 2.0401 0.00 0.04 0.00 -0.40 7 2.0403 0.00 0.10 0.00 0.28 8 2.9926 0.00 0.20 0.00 -0.15 9 2.9928 0.00 -0.05 0.00 -0.23 10 2.9954 0.00 -0.09 0.00 0.08 11 4.1912 0.00 -0.05 0.00 0.37 12 6.8750 0.00 -0.02 0.00 -0.07 13 6.8753 0.00 0.24 0.00 -0.13 14 6.8777 0.00 -0.02 0.00 0.05 15 6.8781 0.00 -0.08 0.00 0.09
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.
160256 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.200 43.200 43.200 ecceobj 0.058 0.058 0.058 incobj 4.909 4.909 4.909 qmin 39.072 39.084 39.062 qmax 47.186 47.198 47.202 amean 43.012 43.012 43.012 amin 42.674 42.673 42.676 amax 43.371 43.381 43.368 emean 0.067 0.067 0.067 emin 0.048 0.048 0.048 emax 0.088 0.088 0.088 imean 3.295 3.295 3.295 imin 2.310 2.310 2.310 imax 4.373 4.372 4.373 fracstop 1.000 1.000 1.000 cjmean 3.080 3.080 3.080 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 179.0 179.1 179.1 kozaiamp 180.0 180.0 180.0