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: 120181 # Created Fri May 2 02:36:21 2008 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 22 observations of 22 # Arc: 3.98y # First observation: 2001/10/06 # Last observation: 2005/09/30 # Chi-squared of fit: 114.52 DOF: 38 RMS: 0.40 # Min/Max residuals: -1.77 0.80 # Exact a, adot, b, bdot, g, gdot: 2.181464E-05 4.898009E-02 4.591212E-07 -1.834039E-03 3.800454E-02 -3.913980E-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 -1.754345 4.588329 -0.143004 -0.030300 -0.985425 2452188.837923 # Heliocentric elements and errors Epoch: 2452190.5000 = 2001/10/08 Mean Anomaly: 338.91382 +/- 0.000 Argument of Peri: 248.64048 +/- 0.000 Long of Asc Node: 146.46294 +/- 0.000 Inclination: 2.71843 +/- 0.000 Eccentricity: 0.17609478 +/- 0.0000 Semi-Major Axis: 32.46422816 +/- 0.0000 Time of Perihelion: 2456147.8233 +/- 0.0 Perihelion: 26.74744715 +/- 0.0000 Aphelion: 38.18100916 +/- 0.0000 Period (y) 184.9762 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 27.18955437 +/- 0.0000 Ecliptic Y 2.33147416 +/- 0.0000 Ecliptic Z -0.80551418 +/- 0.0000 Ecliptic XDOT -0.00057590 +/- 0.0000 Ecliptic YDOT 0.00349510 +/- 0.0000 Ecliptic ZDOT -0.00012322 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 27.30125882 +/- 0.0000 Geocenter to KBO 26.31272378 +/- 0.0000 # Hcoef: 7.01
The following table shows the complete astrometric record for 120181. 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 (120181) followed by the observatory code and reference code for the source of the astrometry.
2001 10 06.33718 00 19 37.68 +00 12 46.8 21.0R 120181 644 Cl0106 2001 10 11.33111 00 19 05.89 +00 09 20.2 21.1R 120181 644 Cl0106 2001 10 17.25494 00 18 29.14 +00 05 23.5 21.0R 120181 644 Cl0106 2002 10 05.20787 00 30 17.45 +01 14 55.2 21.1R 120181 644 Cl0106 2002 10 06.21964 00 30 10.85 +01 14 12.6 20.8R 120181 644 Cl0106 2003 10 19.27417 00 39 23.07 +02 06 41.9 120181 691 Ck3858 2003 10 19.30235 00 39 22.90 +02 06 40.6 120181 691 Ck3858 2003 10 19.33032 00 39 22.73 +02 06 39.9 120181 691 Ck3858 2003 10 24.19583 00 38 52.51 +02 03 30.2 20.8R 120181 695 Cj5825 2003 10 24.29463 00 38 51.89 +02 03 26.4 120181 695 Cj5825 2003 11 20.10495 00 36 35.30 +01 49 41.0 20.9R 120181 695 Cj5825 2003 11 20.19075 00 36 34.93 +01 49 38.9 120181 695 Cj5825 2004 07 17.03361 00 56 50.32 +03 56 16.1 120181 246 Cl0703 2004 07 17.04035 00 56 50.30 +03 56 15.8 120181 246 Cl0703 2004 07 20.14382 00 56 50.842 +03 56 01.96 21.5V 120181 J86 Cl0750 2004 07 22.11268 00 56 50.524 +03 55 49.15 120181 J86 Cl0750 2004 12 11.10679 00 46 03.18 +02 44 58.0 20.9R 120181 290 Cm4099 2004 12 11.20973 00 46 03.03 +02 44 56.9 21.1R 120181 290 Cm4099 2004 12 12.07074 00 46 01.78 +02 44 52.5 21.4R 120181 290 Cm4099 2004 12 12.12898 00 46 01.70 +02 44 52.2 21.3R 120181 290 Cm4099 2005 09 30.31759 01 02 47.47 +04 22 16.9 21.0R 120181 688 Co3932 2005 09 30.41308 01 02 46.85 +04 22 12.9 120181 688 Co3932
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 -0.28 0.00 -1.77 2 0.0137 0.00 0.80 0.00 0.38 3 0.0299 0.00 -0.26 0.00 0.08 4 0.9962 0.00 -0.39 0.00 -0.35 5 0.9990 0.00 -0.18 0.00 0.25 6 2.0341 0.00 0.44 0.00 -0.28 7 2.0341 0.00 0.61 0.00 -0.45 8 2.0342 0.00 0.75 0.00 -0.03 9 2.0475 0.00 -0.10 0.00 0.27 10 2.0478 0.00 -0.21 0.00 0.24 11 2.1212 0.00 0.11 0.00 0.33 12 2.1214 0.00 -0.33 0.00 0.11 13 2.7781 0.00 0.19 0.00 0.07 14 2.7781 0.00 -0.14 0.00 -0.21 15 2.7866 0.00 -0.15 0.00 0.16 16 2.7920 0.00 -0.15 0.00 0.52 17 3.1808 0.00 0.01 0.00 0.22 18 3.1810 0.00 0.25 0.00 -0.29 19 3.1834 0.00 -0.15 0.00 -0.12 20 3.1836 0.00 -0.04 0.00 -0.13 21 3.9835 0.00 -0.04 0.00 -0.01 22 3.9838 0.00 0.20 0.00 0.04
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.
120181 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 32.620 32.620 32.620 ecceobj 0.179 0.179 0.179 incobj 2.715 2.715 2.715 qmin 26.778 26.778 26.778 qmax 40.805 41.439 41.354 amean 33.349 33.124 33.212 amin 32.620 32.545 32.620 amax 34.306 34.729 34.735 emean 0.181 0.178 0.179 emin 0.171 0.171 0.170 emax 0.192 0.193 0.197 imean 1.737 1.709 1.794 imin 1.641 1.512 1.744 imax 1.796 1.796 1.816 fracstop 0.002 0.002 0.002 cjmean 2.973 2.973 2.973 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 244.2 240.3 242.3 kozaiamp 9.2 14.5 11.9