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 Fri Nov 22 02:10:50 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:1 Type: CENTAURR CENTAURR CENTAURR axisobj 54.106 63.696 48.226 ecceobj 0.589 0.636 0.548 incobj 14.503 14.340 14.694 qmin 21.597 22.631 21.532 qmax 123.699 110.848 75.546 amean 63.162 63.930 48.392 amin 53.891 62.616 48.182 amax 73.540 67.258 48.662 emean 0.642 0.637 0.551 emin 0.586 0.628 0.548 emax 0.682 0.649 0.554 imean 14.697 16.195 16.243 imin 12.771 15.747 16.209 imax 16.573 16.794 16.300 excite_mean 0.691 0.696 0.618 fracstop 0.229 0.039 0.001 cjmean 2.620 2.627 2.654 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 145.8 281.1 285.3 kozaiamp 179.9 17.6 0.7