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: 06HW122 # Created Tue Apr 1 01:08:52 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 14 observations of 14 # Arc: 8.99y # First observation: 2006/04/27 # Last observation: 2015/04/24 # Chi-squared of fit: 20.99 DOF: 22 RMS: 0.22 # Min/Max residuals: -0.49 0.39 # Exact a, adot, b, bdot, g, gdot: 1.502629E-05 2.257478E-02 -8.240412E-07 -6.042950E-04 2.337278E-02 1.346037E-03 # Covariance matrix: 3.0248E-13 -7.5417E-14 -6.5476E-16 1.0993E-15 2.2002E-13 -2.0163E-13 -7.5417E-14 1.8802E-13 2.3488E-15 -4.8334E-15 7.7808E-14 8.9570E-13 -6.5476E-16 2.3488E-15 1.5130E-13 -2.2541E-14 1.1213E-15 1.1925E-14 1.0993E-15 -4.8334E-15 -2.2541E-14 1.1378E-14 -2.7535E-15 -2.4662E-14 2.2002E-13 7.7808E-14 1.1213E-15 -2.7535E-15 4.7167E-13 5.1402E-13 -2.0163E-13 8.9570E-13 1.1925E-14 -2.4662E-14 5.1402E-13 4.5713E-12 # lat0 lon0 xBary yBary zBary JD0 -0.065478 -131.151110 0.209804 -0.001006 -0.979809 2453852.761234 # Heliocentric elements and errors Epoch: 2453852.5000 = 2006/04/27 Mean Anomaly: 48.26272 +/- 0.058 Argument of Peri: 127.73581 +/- 0.070 Long of Asc Node: 46.17768 +/- 0.001 Inclination: 1.53137 +/- 0.000 Eccentricity: 0.07058533 +/- 0.0001 Semi-Major Axis: 45.78470935 +/- 0.0055 Time of Perihelion: 2438682.4000 +/- 18.4 Perihelion: 42.55298034 +/- 0.0069 Aphelion: 49.01643835 +/- 0.0075 Period (y) 309.8053 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -28.96016095 +/- 0.0008 Ecliptic Y -32.81898821 +/- 0.0009 Ecliptic Z -0.04892780 +/- 0.0000 Ecliptic XDOT 0.00189126 +/- 0.0000 Ecliptic YDOT -0.00186449 +/- 0.0000 Ecliptic ZDOT -0.00007099 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.76958006 +/- 0.0009 Geocenter to KBO 42.78480945 +/- 0.0013 # Hcoef: 6.37
The following table shows the complete astrometric record for 06HW122. 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 (06HW122) followed by the observatory code and reference code for the source of the astrometry.
2006 04 27.26048 15 05 29.74 -17 29 29.6 22.1R 06HW122 807 Cr3609 2006 04 27.33297 15 05 29.40 -17 29 28.1 06HW122 807 Cr3609 2006 04 28.17517 15 05 25.57 -17 29 12.9 06HW122 807 Cr3609 2006 06 20.01817 15 01 38.81 -17 13 54.9 23.3R 06HW122 304 Cr4858 2006 06 20.11242 15 01 38.48 -17 13 53.6 06HW122 304 Cr4858 2006 08 21.04147 15 00 44.70 -17 10 25.0 22.0R 06HW122 807 Cs2782 2006 08 22.03683 15 00 46.58 -17 10 33.2 06HW122 807 Cs2782 2006 08 23.03895 15 00 48.54 -17 10 41.0 06HW122 807 Cs2782 2007 04 21.19885 15 11 09.47 -17 54 22.8 21.3R 06HW122 807 Cv1549 2007 04 22.26735 15 11 04.77 -17 54 04.0 06HW122 807 Cv1549 2009 06 23.21173 15 16 56.63 -18 21 31.6 23.0R 06HW122 688 C~07c5 2009 06 23.27900 15 16 56.43 -18 21 30.4 06HW122 688 C~07c5 2015 04 24.35661 15 52 37.20 -20 35 46.3 23.2R 06HW122 G37 C~1ReK 2015 04 24.45047 15 52 36.79 -20 35 45.6 06HW122 G37 C~1ReK
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 0.08 0.00 0.07
2 0.0002 0.00 -0.00 0.00 0.24
3 0.0025 0.00 -0.05 0.00 0.09
4 0.1472 0.00 0.03 0.00 0.06
5 0.1474 0.00 -0.14 0.00 0.09
6 0.3170 0.00 -0.11 0.00 -0.16
7 0.3197 0.00 0.14 0.00 -0.32
8 0.3225 0.00 0.07 0.00 0.34
9 0.9827 0.00 0.22 0.00 -0.34
10 0.9856 0.00 -0.11 0.00 0.39
11 3.1566 0.00 -0.36 0.00 -0.49
12 3.1568 0.00 0.10 0.00 -0.15
13 8.9914 0.00 0.12 0.00 0.33
14 8.9916 0.00 -0.06 0.00 -0.10
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.
06HW122 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.170 45.170 45.170 ecceobj 0.062 0.062 0.062 incobj 1.538 1.538 1.538 qmin 41.743 41.761 41.729 qmax 49.577 49.564 49.571 amean 45.515 45.515 45.515 amin 45.142 45.149 45.139 amax 45.904 45.901 45.905 emean 0.066 0.066 0.066 emin 0.053 0.052 0.053 emax 0.080 0.080 0.080 imean 1.369 1.369 1.369 imin 0.869 0.869 0.869 imax 1.776 1.776 1.776 excite_mean 0.070 0.070 0.070 fracstop 1.000 1.000 1.000 cjmean 3.114 3.114 3.114 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 171.1 171.1 171.1 kozaiamp 180.0 180.0 179.9