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: 17CF56 # Created Sun Dec 22 02:10:56 2024 # Orbit generated from Bernstein formalism # Fitting 16 observations of 16 # Arc: 1.11y # First observation: 2016/02/12 # Last observation: 2017/03/22 Preliminary a, adot, b, bdot, g, gdot: 0.000000 0.063546 0.000001 -0.009665 0.042477 0.000000 # Chi-squared of fit: 9.20 DOF: 26 RMS: 0.13 # Min/Max residuals: -0.31 0.30 # Exact a, adot, b, bdot, g, gdot: 2.370033E-05 6.246467E-02 -3.919244E-06 -9.485399E-03 4.186650E-02 -1.804073E-02 # Covariance matrix: 4.8976E-13 2.9960E-13 1.3377E-15 -1.2253E-13 3.3984E-13 1.2498E-11 2.9960E-13 1.3661E-09 2.3681E-12 -2.1355E-10 7.2411E-10 2.1628E-08 1.3377E-15 2.3681E-12 4.8761E-13 -8.4584E-13 1.2558E-12 3.7507E-11 -1.2253E-13 -2.1355E-10 -8.4584E-13 3.3970E-11 -1.1322E-10 -3.3824E-09 3.3984E-13 7.2411E-10 1.2558E-12 -1.1322E-10 3.8484E-10 1.1466E-08 1.2498E-11 2.1628E-08 3.7507E-11 -3.3824E-09 1.1466E-08 3.4256E-07 # lat0 lon0 xBary yBary zBary JD0 -12.220700 148.011874 0.092597 -0.207435 -0.958603 2457430.852118 # Heliocentric elements and errors Epoch: 2457430.5000 = 2016/02/12 Mean Anomaly: 350.60025 +/- 0.293 Argument of Peri: 278.32926 +/- 0.935 Long of Asc Node: 274.25034 +/- 0.015 Inclination: 14.48687 +/- 0.002 Eccentricity: 0.60191129 +/- 0.0095 Semi-Major Axis: 55.86374502 +/- 1.0372 Time of Perihelion: 2461412.5570 +/- 55.8 Perihelion: 22.23872617 +/- 0.6740 Aphelion: 89.48876387 +/- 1.7449 Period (y) 417.5450 +/- 11.63 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -20.58641685 +/- 0.0093 Ecliptic Y 12.96234944 +/- 0.0058 Ecliptic Z -5.05613083 +/- 0.0024 Ecliptic XDOT -0.00107500 +/- 0.0000 Ecliptic YDOT -0.00415196 +/- 0.0000 Ecliptic ZDOT -0.00035649 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 24.84728397 +/- 0.0083 Geocenter to KBO 23.88544480 +/- 0.0112 # Hcoef: 10.67
The following table shows the complete astrometric record for 17CF56. 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 (17CF56) followed by the observatory code and reference code for the source of the astrometry.
2016 02 12.351329 09 43 58.96 +00 40 20.4 17CF56 T09 C~86ur 2016 02 12.383678 09 43 58.72 +00 40 21.2 17CF56 T09 C~86ur 2016 02 12.405427 09 43 58.55 +00 40 22.0 17CF56 T09 C~86ur 2017 01 26.53794 09 58 53.01 -01 11 15.4 24.4z 17CF56 T09 C~81Br 2017 01 26.56693 09 58 52.80 -01 11 14.6 24.1z 17CF56 T09 C~81Br 2017 01 26.59916 09 58 52.57 -01 11 14.1 23.8z 17CF56 T09 C~81Br 2017 02 02.37546 09 58 05.52 -01 08 58.0 25.0r 17CF56 T09 C~81Br 2017 02 02.39083 09 58 05.40 -01 08 57.4 24.7r 17CF56 T09 C~81Br 2017 02 02.39300 09 58 05.36 -01 08 57.4 24.8r 17CF56 T09 C~81Br 2017 02 02.41063 09 58 05.24 -01 08 57.4 25.1r 17CF56 T09 C~81Br 2017 03 06.43229 09 54 12.09 -00 50 56.2 24.2i 17CF56 T09 C~81Br 2017 03 06.44111 09 54 12.04 -00 50 55.9 24.1i 17CF56 T09 C~81Br 2017 03 06.44718 09 54 12.00 -00 50 55.4 24.2i 17CF56 T09 C~81Br 2017 03 06.45254 09 54 11.96 -00 50 55.4 24.3i 17CF56 T09 C~81Br 2017 03 06.46600 09 54 11.86 -00 50 54.9 23.7i 17CF56 T09 C~81Br 2017 03 22.238164 09 52 32.13 -00 39 37.6 17CF56 T09 C~86ur
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 -0.02 0.00 0.07
2 0.0001 -3.66 0.08 -0.46 -0.09
3 0.0001 -6.33 -0.06 -0.57 -0.00
4 0.9560 14909.15 0.25 -1781.30 -0.16
5 0.9561 14905.90 0.00 -1781.61 0.08
6 0.9562 14902.46 -0.10 -1782.30 -0.01
7 0.9747 14188.76 0.23 -1892.12 0.11
8 0.9748 14186.86 0.02 -1892.16 0.30
9 0.9748 14186.29 -0.31 -1892.36 0.13
10 0.9748 14184.59 -0.06 -1892.97 -0.21
11 1.0625 10514.77 -0.16 -2053.66 -0.05
12 1.0625 10513.96 0.03 -2053.63 -0.05
13 1.0625 10513.22 -0.02 -2053.36 0.20
14 1.0626 10512.66 0.03 -2053.56 -0.02
15 1.0626 10511.07 -0.03 -2053.60 -0.10
16 1.1058 8870.72 0.12 -1920.13 -0.18
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.
17CF56 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 55.002 56.021 54.240 ecceobj 0.594 0.607 0.584 incobj 14.471 14.461 14.481 qmin 21.741 21.788 21.823 qmax 93.145 94.381 87.951 amean 54.961 57.245 53.660 amin 53.826 55.886 51.035 amax 57.791 58.230 55.209 emean 0.596 0.613 0.582 emin 0.586 0.607 0.566 emax 0.617 0.621 0.594 imean 15.943 15.949 16.226 imin 15.232 15.865 15.846 imax 16.275 16.065 16.683 excite_mean 0.657 0.671 0.646 fracstop 0.015 0.004 0.015 cjmean 2.633 2.622 2.645 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 287.1 284.4 282.3 kozaiamp 9.4 3.0 6.9