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: 03WU172
# Created Fri May 2 02:36:54 2008
# Orbit generated from Bernstein formalism
# Fitting 18 observations of 19
# Arc: 3.98y
# First observation: 2003/11/19
# Last observation: 2007/11/11
Preliminary a, adot, b, bdot, g, gdot:
-0.000059 0.042143 -0.000002 0.001679 0.034424 0.000000
# Chi-squared of fit: 23.72 DOF: 30 RMS: 0.20
# Min/Max residuals: -0.46 0.47
# Exact a, adot, b, bdot, g, gdot:
1.798820E-05 4.108448E-02 1.819859E-06 1.627011E-03 3.338264E-02 -5.874053E-03
# Covariance matrix:
1.6310E-13 -7.0419E-14 1.2954E-15 -3.4773E-16 1.1325E-13 -1.2200E-13
-7.0419E-14 5.1134E-13 -2.4522E-15 1.9180E-14 2.8798E-13 3.0841E-12
1.2954E-15 -2.4522E-15 1.2120E-13 -4.3248E-14 2.1937E-15 -1.4605E-14
-3.4773E-16 1.9180E-14 -4.3248E-14 4.7878E-14 1.4407E-14 1.2855E-13
1.1325E-13 2.8798E-13 2.1937E-15 1.4407E-14 5.9851E-13 2.1034E-12
-1.2200E-13 3.0841E-12 -1.4605E-14 1.2855E-13 2.1034E-12 2.0573E-11
# lat0 lon0 xBary yBary zBary JD0
3.578345 67.424808 0.192679 0.060509 -0.966761 2452962.749583
# Heliocentric elements and errors
Epoch: 2452960.5000 = 2003/11/17
Mean Anomaly: 334.12764 +/- 0.012
Argument of Peri: 100.42681 +/- 0.023
Long of Asc Node: 10.48823 +/- 0.004
Inclination: 4.15026 +/- 0.000
Eccentricity: 0.25965870 +/- 0.0001
Semi-Major Axis: 39.37824334 +/- 0.0052
Time of Perihelion: 2459447.0895 +/- 2.8
Perihelion: 29.15333994 +/- 0.0059
Aphelion: 49.60314673 +/- 0.0079
Period (y) 247.1114 +/- 0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 12.02347482 +/- 0.0003
Ecliptic Y 28.43022787 +/- 0.0006
Ecliptic Z 1.86969018 +/- 0.0000
Ecliptic XDOT -0.00330362 +/- 0.0000
Ecliptic YDOT 0.00083572 +/- 0.0000
Ecliptic ZDOT 0.00010327 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 30.92470767 +/- 0.0006
Geocenter to KBO 29.95568939 +/- 0.0007
# Hcoef: 6.60
The following table shows the complete astrometric record for 03WU172. 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 (03WU172) followed by the observatory code and reference code for the source of the astrometry.
2003 11 19.24884 04 19 53.85 +25 04 39.3 21.8V 03WU172 691 Ck3859 2003 11 19.27688 04 19 53.64 +25 04 39.2 21.3V 03WU172 691 Ck3859 2003 11 19.30484 04 19 53.43 +25 04 38.6 21.6V 03WU172 691 Ck3859 2003 11 21.41591 04 19 38.80 +25 04 09.1 21.8V 03WU172 691 Cj3802 2003 11 21.44322 04 19 38.60 +25 04 08.8 21.9V 03WU172 691 Cj3802 2003 11 21.47107 04 19 38.39 +25 04 08.3 21.9V 03WU172 691 Cj3802 2003 12 14.30706 04 16 59.54 +24 58 03.8 22.2V 03WU172 291 Cj3802 2003 12 14.33954 04 16 59.30 +24 58 03.8 21.5V 03WU172 291 Cj3802 2003 12 14.36935 04 16 59.12 +24 58 03.0 21.7V 03WU172 291 Cj3802 2003 12 16.17741 04 16 47.13 +24 57 31.9 21.3V 03WU172 291 Cj3802 2003 12 16.20672 04 16 46.93 +24 57 31.8 21.1V 03WU172 291 Cj3802 2003 12 16.32260 04 16 46.26 +24 57 28.2 20.9V 03WU172 291 Cj3802 2005 03 04.15874 04 23 14.59 +25 11 49.2 03WU172 G96 Cn1691 2005 03 09.13376 04 23 28.28 +25 11 48.2 03WU172 G96 Cn1691 2005 03 11.14427 04 23 34.80 +25 11 50.2 03WU172 G96 Cn1691 2005 10 27.52861 04 42 56.14 +26 01 10.5 20.5R 03WU172 568 Cp2052 2005 10 27.60358 04 42 55.72 +26 01 10.0 03WU172 568 Cp2052 2007 11 11.39845 05 02 58.08 +26 42 42.1 21.0R 03WU172 688 Cw6828 2007 11 11.47295 05 02 57.61 +26 42 41.7 03WU172 688 Cw6828
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 0.30 0.00 -0.22 2 0.0001 -2.83 0.17 0.38 0.09 3 0.0002 -5.74 -0.06 0.27 -0.10 4 0.0059 -206.64 0.09 4.75 -0.10 5 0.0060 -209.37 0.01 4.92 0.01 6 0.0061 -212.27 -0.20 4.91 -0.04 7 0.0686 -2402.08 -0.31 16.06 -0.13 8 0.0687 -2405.29 -0.46 16.62 0.47 9 0.0688 -2407.84 -0.20 16.26 0.14 10 0.0737 -2573.84 0.29 14.02 -0.06 11 0.0738 -2576.53 0.33 14.39 0.34 12 0.0741 -2586.13 ( 1.52) 12.44 ( -1.50) 13 1.2893 2759.64 -0.23 -27.29 -0.20 14 1.3029 2942.86 0.13 -58.43 -0.21 15 1.3084 3030.53 0.23 -70.80 -0.19 16 1.9392 19054.61 0.05 599.81 0.07 17 1.9394 19048.89 -0.16 600.03 -0.10 18 3.9785 35676.62 -0.01 1369.53 0.15 19 3.9787 35670.12 0.03 1369.68 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.
03WU172 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.560 39.560 39.560 ecceobj 0.260 0.260 0.260 incobj 4.140 4.140 4.140 qmin 28.768 28.779 28.760 qmax 50.979 50.934 50.975 amean 39.456 39.456 39.456 amin 38.910 38.902 38.921 amax 40.095 40.093 40.089 emean 0.256 0.256 0.255 emin 0.241 0.240 0.240 emax 0.272 0.272 0.272 imean 4.466 4.494 4.569 imin 3.854 3.849 3.843 imax 5.059 5.059 5.204 fracstop 1.000 1.000 1.000 cjmean 2.969 2.969 2.970 libcent 0 180.1 180.3 179.5 libamp 0 120.8 120.1 119.8 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 188.4 184.6 170.1 kozaiamp 180.0 180.0 180.0