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: 82158
# Created Fri May 2 02:36:19 2008
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 46 observations of 46
# Arc: 4.05y
# First observation: 2001/03/26
# Last observation: 2005/04/14
# Chi-squared of fit: 359.00 DOF: 86 RMS: 0.49
# Min/Max residuals: -1.40 1.71
# Exact a, adot, b, bdot, g, gdot:
1.959220E-05 3.740764E-02 9.825176E-06 2.230439E-02 2.997458E-02 -2.455168E-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
0.117687 179.361732 -0.113295 0.001890 -0.995674 2451994.695373
# Heliocentric elements and errors
Epoch: 2451995.5000 = 2001/03/27
Mean Anomaly: 359.69721 +/- 0.000
Argument of Peri: 6.69130 +/- 0.000
Long of Asc Node: 179.35051 +/- 0.000
Inclination: 30.82308 +/- 0.000
Eccentricity: 0.84090871 +/- 0.0000
Semi-Major Axis: 215.30849430 +/- 0.0000
Time of Perihelion: 2452966.0907 +/- 0.0
Perihelion: 34.25370611 +/- 0.0000
Aphelion: 396.36328249 +/- 0.0000
Period (y) 3159.3661 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -34.35240060 +/- 0.0000
Ecliptic Y 0.27399559 +/- 0.0000
Ecliptic Z 0.06886894 +/- 0.0000
Ecliptic XDOT 0.00018202 +/- 0.0000
Ecliptic YDOT -0.00341623 +/- 0.0000
Ecliptic ZDOT 0.00203699 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 34.35360169 +/- 0.0000
Geocenter to KBO 33.36166801 +/- 0.0000
# Hcoef: 6.09
The following table shows the complete astrometric record for 82158. 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 (82158) followed by the observatory code and reference code for the source of the astrometry.
2001 03 26.19463 11 57 50.69 +00 21 42.7 22.2R 82158 695 Cd1722 2001 03 26.30434 11 57 50.14 +00 21 47.8 82158 695 Cd1722 2001 04 25.17612 11 55 39.10 +00 42 45.7 21.2R 82158 688 Cd1722 2001 04 25.25883 11 55 38.81 +00 42 48.8 82158 688 Cd1722 2001 04 26.20087 11 55 35.43 +00 43 23.2 21.2R 82158 688 Cd1722 2001 04 26.37502 11 55 34.75 +00 43 28.8 82158 688 Cd1722 2001 04 29.18265 11 55 25.09 +00 45 10.4 21.0R 82158 695 Cd1722 2001 04 29.29463 11 55 24.71 +00 45 14.1 82158 695 Cd1722 2001 05 21.98747 11 54 29.94 +00 56 08.8 21.1R 82158 807 Cd1722 2001 05 22.10428 11 54 29.74 +00 56 11.4 82158 807 Cd1722 2001 06 08.95929 11 54 21.06 +01 00 57.9 21.8R 82158 304 Cd1722 2001 06 09.02126 11 54 21.08 +01 00 58.5 82158 304 Cd1722 2002 02 03.62953 12 11 18.99 +00 05 23.2 20.9R 82158 568 Cf2334 2002 02 04.58780 12 11 16.38 +00 05 54.8 82158 568 Cf2334 2002 02 04.62480 12 11 16.26 +00 05 56.3 82158 568 Cf2334 2002 02 22.62537 12 10 13.94 +00 17 15.6 20.7R 82158 568 Ce9335 2002 02 22.64815 12 10 13.82 +00 17 17.1 20.7R 82158 568 Ce9335 2002 02 23.62434 12 10 09.84 +00 17 57.2 20.7R 82158 568 Ce9335 2002 06 06.28904 12 04 02.37 +01 19 21.5 82158 568 Cf8897 2002 06 06.29191 12 04 02.37 +01 19 21.5 82158 568 Cf8897 2002 06 06.29688 12 04 02.37 +01 19 21.4 82158 568 Cf8897 2002 06 06.30232 12 04 02.37 +01 19 21.5 82158 568 Cf8897 2002 06 06.30606 12 04 02.37 +01 19 21.5 82158 568 Cf8897 2002 06 06.30908 12 04 02.38 +01 19 21.7 82158 568 Cf8897 2002 06 06.31202 12 04 02.37 +01 19 21.7 82158 568 Cf8897 2002 06 06.31698 12 04 02.36 +01 19 21.7 82158 568 Cf8897 2002 06 06.32242 12 04 02.37 +01 19 21.6 82158 568 Cf8897 2003 03 02.51264 12 19 37.48 +00 41 47.9 82158 568 Ch5853 2003 03 02.52904 12 19 37.41 +00 41 48.8 82158 568 Ch5853 2003 03 03.42396 12 19 33.49 +00 42 28.6 82158 568 Ch5853 2003 03 03.44065 12 19 33.41 +00 42 29.1 82158 568 Ch5853 2003 03 27.88146 12 17 37.50 +01 00 59.1 21.0R 82158 230 Ch8068 2003 03 28.03456 12 17 36.74 +01 01 06.2 21.0R 82158 230 Ch8068 2003 03 28.04675 12 17 36.68 +01 01 06.8 20.9R 82158 230 Ch8068 2003 04 24.98331 12 15 28.68 +01 20 38.6 21.4R 82158 230 Ch8068 2003 04 24.99311 12 15 28.63 +01 20 39.1 21.3R 82158 230 Ch8068 2003 04 25.00841 12 15 28.55 +01 20 39.5 21.3R 82158 230 Ch8068 2004 03 17.02893 12 28 25.31 +01 12 18.2 21. R 82158 621 Ck3815 2004 03 19.25620 12 28 14.59 +01 14 00.7 21.0R 82158 688 Ck2063 2004 03 19.32280 12 28 14.26 +01 14 03.7 82158 688 Ck2063 2004 03 26.02770 12 27 41.53 +01 19 10.8 21. R 82158 621 Ck3815 2004 03 27.03882 12 27 36.58 +01 19 57.2 20. R 82158 621 Ck3815 2005 04 13.20763 12 36 13.25 +01 51 07.7 21.3R 82158 675 Cn3789 2005 04 13.24918 12 36 13.04 +01 51 09.6 21.1R 82158 675 Cn3789 2005 04 14.20697 12 36 08.46 +01 51 49.1 21.3R 82158 675 Cn3789 2005 04 14.26594 12 36 08.17 +01 51 51.7 21.3R 82158 675 Cn3789
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 1.71 2 0.0003 0.00 0.15 0.00 0.44 3 0.0821 0.00 0.22 0.00 0.65 4 0.0823 0.00 0.49 0.00 0.69 5 0.0849 0.00 0.56 0.00 0.43 6 0.0854 0.00 -0.15 0.00 -0.33 7 0.0931 0.00 0.21 0.00 0.66 8 0.0934 0.00 0.28 0.00 0.43 9 0.1555 0.00 0.08 0.00 -0.05 10 0.1558 0.00 -0.33 0.00 -0.02 11 0.2047 0.00 -0.20 0.00 0.56 12 0.2049 0.00 -0.21 0.00 0.54 13 0.8609 0.00 -0.32 0.00 -1.27 14 0.8635 0.00 -0.45 0.00 -1.40 15 0.8636 0.00 -0.66 0.00 -1.14 16 0.9129 0.00 -0.09 0.00 -1.18 17 0.9129 0.00 -0.47 0.00 -0.63 18 0.9156 0.00 -0.13 0.00 -1.16 19 1.1967 0.00 -0.09 0.00 -0.01 20 1.1967 0.00 -0.08 0.00 -0.04 21 1.1967 0.00 -0.06 0.00 -0.20 22 1.1967 0.00 -0.04 0.00 -0.16 23 1.1967 0.00 -0.03 0.00 -0.20 24 1.1968 0.00 0.13 0.00 -0.04 25 1.1968 0.00 -0.01 0.00 -0.07 26 1.1968 0.00 -0.14 0.00 -0.13 27 1.1968 0.00 0.03 0.00 -0.29 28 1.9338 0.00 0.27 0.00 0.37 29 1.9338 0.00 0.31 0.00 0.55 30 1.9363 0.00 -0.10 0.00 0.91 31 1.9363 0.00 -0.17 0.00 0.67 32 2.0032 0.00 0.64 0.00 -0.31 33 2.0037 0.00 0.67 0.00 -0.16 34 2.0037 0.00 0.68 0.00 -0.11 35 2.0802 0.00 0.57 0.00 -0.02 36 2.0802 0.00 0.42 0.00 0.12 37 2.0803 0.00 0.15 0.00 -0.05 38 2.9756 0.00 0.03 0.00 0.34 39 2.9817 0.00 -0.19 0.00 0.22 40 2.9819 0.00 -0.23 0.00 0.16 41 3.0002 0.00 -0.55 0.00 -0.21 42 3.0030 0.00 -0.37 0.00 0.17 43 4.0493 0.00 0.80 0.00 -0.29 44 4.0494 0.00 0.64 0.00 -0.10 45 4.0521 0.00 -0.44 0.00 0.02 46 4.0522 0.00 -0.56 0.00 0.20
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.
82158 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 210.606 210.604 210.608 ecceobj 0.837 0.837 0.837 incobj 30.856 30.856 30.856 qmin 31.297 31.274 31.468 qmax 474.449 467.326 430.276 amean 221.522 222.891 209.561 amin 206.112 207.209 197.680 amax 254.277 250.354 232.261 emean 0.847 0.848 0.839 emin 0.833 0.832 0.824 emax 0.866 0.867 0.853 imean 29.598 29.685 29.662 imin 28.004 28.158 28.313 imax 31.040 31.065 31.067 fracstop 1.000 1.000 1.000 cjmean 2.640 2.638 2.640 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 29.1 28.0 30.4 kozaiamp 23.1 21.8 23.4