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: 169071 # Created Sun Dec 22 02:06:59 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 16 observations of 16 # Arc: 15.20y # First observation: 2001/03/26 # Last observation: 2016/06/08 # Chi-squared of fit: 78.78 DOF: 26 RMS: 0.39 # Min/Max residuals: -0.91 0.74 # Exact a, adot, b, bdot, g, gdot: 1.811803E-05 3.307627E-02 1.013767E-06 2.588339E-04 2.964254E-02 -4.842324E-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 -5.781417 -157.654122 0.281508 -0.097057 -0.956914 2451994.874613 # Heliocentric elements and errors Epoch: 2451994.5000 = 2001/03/26 Mean Anomaly: 315.49563 +/- 0.000 Argument of Peri: 336.77759 +/- 0.000 Long of Asc Node: 287.36465 +/- 0.000 Inclination: 5.63936 +/- 0.000 Eccentricity: 0.18774951 +/- 0.0000 Semi-Major Axis: 39.09437748 +/- 0.0000 Time of Perihelion: 2463031.9825 +/- 0.0 Perihelion: 31.75442745 +/- 0.0000 Aphelion: 46.43432752 +/- 0.0000 Period (y) 244.4442 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -32.03571362 +/- 0.0000 Ecliptic Y -12.86148472 +/- 0.0000 Ecliptic Z -3.39821377 +/- 0.0000 Ecliptic XDOT 0.00156249 +/- 0.0000 Ecliptic YDOT -0.00265445 +/- 0.0000 Ecliptic ZDOT 0.00006903 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 34.68802189 +/- 0.0000 Geocenter to KBO 33.73541063 +/- 0.0000 # Hcoef: 7.99
The following table shows the complete astrometric record for 169071. 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 (169071) followed by the observatory code and reference code for the source of the astrometry.
2001 03 26.37387 13 13 47.70 -14 03 24.9 24.5R 169071 695 Cd1722 2001 03 26.45371 13 13 47.27 -14 03 22.5 169071 695 Cd1722 2001 04 29.33189 13 10 44.78 -13 45 08.2 22.7R 169071 695 Cd1722 2001 04 29.37843 13 10 44.50 -13 45 06.2 169071 695 Cd1722 2001 05 22.04014 13 09 03.01 -13 32 53.3 23.1R 169071 807 Cd1722 2001 05 22.15008 13 09 02.61 -13 32 50.4 169071 807 Cd1722 2002 04 06.17600 13 20 08.96 -14 40 16.8 21.8R 169071 807 Cf4616 2002 04 06.31099 13 20 08.22 -14 40 13.2 169071 807 Cf4616 2002 04 07.20541 13 20 03.29 -14 39 45.2 169071 807 Cf4616 2003 04 29.41468 13 25 27.89 -15 09 37.0 23.0R 169071 568 Ch9859 2003 04 29.44264 13 25 27.77 -15 09 36.0 169071 568 Ch9859 2003 04 30.45411 13 25 22.38 -15 09 01.9 169071 568 Ch9859 2007 07 11.97477 13 52 09.95 -17 20 28.3 169071 304 Cv1971 2007 07 12.06139 13 52 09.96 -17 20 27.1 169071 304 Cv1971 2016 06 08.19565 15 09 33.744 -22 40 03.92 22.8R 169071 G37 C~2cDk 2016 06 08.23071 15 09 33.546 -22 40 02.93 169071 G37 C~2cDk
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 -0.16 0.00 -0.13
2 0.0002 0.00 -0.17 0.00 0.00
3 0.0930 0.00 0.65 0.00 -0.38
4 0.0931 0.00 0.06 0.00 0.03
5 0.1551 0.00 -0.38 0.00 0.28
6 0.1554 0.00 -0.08 0.00 -0.09
7 1.0289 0.00 0.50 0.00 0.30
8 1.0293 0.00 0.74 0.00 -0.27
9 1.0317 0.00 0.62 0.00 0.00
10 2.0918 0.00 -0.91 0.00 0.28
11 2.0919 0.00 -0.43 0.00 0.34
12 2.0947 0.00 -0.67 0.00 0.38
13 6.2932 0.00 -0.03 0.00 -0.67
14 6.2935 0.00 0.25 0.00 -0.42
15 15.2028 0.00 0.06 0.00 0.12
16 15.2029 0.00 -0.05 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.
169071 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.015 39.015 39.015 ecceobj 0.188 0.188 0.188 incobj 5.639 5.639 5.639 qmin 30.849 30.849 30.845 qmax 48.680 48.670 48.686 amean 39.456 39.456 39.456 amin 38.991 38.996 38.984 amax 39.996 39.990 39.996 emean 0.197 0.197 0.197 emin 0.179 0.179 0.180 emax 0.218 0.218 0.218 imean 7.511 7.511 7.512 imin 6.813 6.814 6.813 imax 8.266 8.267 8.267 excite_mean 0.237 0.237 0.237 fracstop 1.000 1.000 1.000 cjmean 2.988 2.988 2.988 libcent 0 180.5 180.1 179.8 libamp 0 91.7 92.3 91.6 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 179.2 179.2 179.2 kozaiamp 180.0 180.0 180.0