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: 17CF60 # Created Sun Dec 22 02:10:56 2024 # Orbit generated from Bernstein formalism # Fitting 19 observations of 19 # Arc: 2.32y # First observation: 2016/02/12 # Last observation: 2018/06/10 Preliminary a, adot, b, bdot, g, gdot: 0.000059 0.018152 0.000036 -0.001203 0.021428 0.000000 # Chi-squared of fit: 6.63 DOF: 32 RMS: 0.10 # Min/Max residuals: -0.23 0.22 # Exact a, adot, b, bdot, g, gdot: 1.392807E-05 1.831050E-02 -1.138743E-06 -1.141819E-03 2.123694E-02 -7.724891E-04 # Covariance matrix: 3.6338E-13 -6.0960E-13 1.3797E-14 -5.4556E-15 -3.3960E-13 -1.4080E-11 -6.0960E-13 4.6290E-12 -3.6535E-13 4.1304E-13 1.3760E-12 1.8177E-10 1.3797E-14 -3.6535E-13 2.7788E-13 -2.2682E-13 -5.8516E-14 -1.5923E-11 -5.4556E-15 4.1304E-13 -2.2682E-13 2.5842E-13 4.0010E-14 1.8434E-11 -3.3960E-13 1.3760E-12 -5.8516E-14 4.0010E-14 9.6182E-13 4.7712E-11 -1.4080E-11 1.8177E-10 -1.5923E-11 1.8434E-11 4.7712E-11 7.6144E-09 # lat0 lon0 xBary yBary zBary JD0 -12.489340 144.397294 0.030701 -0.212767 -0.961410 2457430.845210 # Heliocentric elements and errors Epoch: 2457430.5000 = 2016/02/12 Mean Anomaly: 209.89752 +/- 2.306 Argument of Peri: 49.02377 +/- 2.305 Long of Asc Node: 250.78851 +/- 0.006 Inclination: 12.73877 +/- 0.000 Eccentricity: 0.09607861 +/- 0.0020 Semi-Major Axis: 44.27398555 +/- 0.0121 Time of Perihelion: 2502295.4004 +/- 688.9 Perihelion: 40.02020277 +/- 0.0873 Aphelion: 48.52776833 +/- 0.0876 Period (y) 294.5989 +/- 0.12 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -38.16669581 +/- 0.0017 Ecliptic Y 27.35995881 +/- 0.0012 Ecliptic Z -10.18317640 +/- 0.0005 Ecliptic XDOT -0.00126968 +/- 0.0000 Ecliptic YDOT -0.00200143 +/- 0.0000 Ecliptic ZDOT -0.00012217 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 48.05165030 +/- 0.0015 Geocenter to KBO 47.08777132 +/- 0.0022 # Hcoef: 7.01
The following table shows the complete astrometric record for 17CF60. 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 (17CF60) followed by the observatory code and reference code for the source of the astrometry.
2016 02 12.344421 09 30 17.72 +01 35 09.7 17CF60 T09 C~89UW 2016 02 12.37560 09 30 17.58 +01 35 10.1 23.4y 17CF60 T09 C~8COt 2016 02 12.41099 09 30 17.44 +01 35 11.0 23.3y 17CF60 T09 C~8COt 2016 02 12.443814 09 30 17.31 +01 35 11.6 17CF60 T09 C~89UW 2016 12 25.483314 09 37 07.41 +01 02 29.4 17CF60 T09 C~89UW 2017 01 21.37198 09 35 38.47 +01 05 09.2 24.0z 17CF60 T09 C~89UW 2017 01 21.39613 09 35 38.37 +01 05 09.4 23.4z 17CF60 T09 C~89UW 2017 01 21.41490 09 35 38.28 +01 05 09.5 23.5z 17CF60 T09 C~89UW 2017 01 28.391375 09 35 10.54 +01 06 45.5 17CF60 T09 C~89UW 2017 01 28.399817 09 35 10.50 +01 06 45.7 17CF60 T09 C~89UW 2017 02 01.48142 09 34 53.77 +01 07 51.3 23.6i 17CF60 T09 C~89UW 2017 02 01.48410 09 34 53.76 +01 07 51.2 23.6i 17CF60 T09 C~89UW 2017 02 01.51446 09 34 53.63 +01 07 51.7 23.8i 17CF60 T09 C~89UW 2017 02 01.52270 09 34 53.59 +01 07 51.7 23.5i 17CF60 T09 C~89UW 2017 02 01.52538 09 34 53.59 +01 07 52.0 23.4i 17CF60 T09 C~89UW 2017 02 01.55545 09 34 53.44 +01 07 52.2 23.7i 17CF60 T09 C~89UW 2017 03 04.385780 09 32 47.36 +01 18 47.7 17CF60 T09 C~89UW 2018 06 10.248590 09 35 18.52 +01 22 51.4 17CF60 T14 C~89UW 2018 06 10.251851 09 35 18.53 +01 22 51.5 17CF60 T14 C~89UW
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 -0.06 0.00 0.06
2 0.0001 -2.12 -0.09 -0.30 -0.19
3 0.0002 -4.39 0.00 -0.13 0.04
4 0.0003 -6.43 0.16 -0.19 0.03
5 0.8683 6449.56 -0.00 135.31 0.03
6 0.9419 5134.86 0.10 -145.97 0.22
7 0.9420 5133.38 0.07 -146.27 0.11
8 0.9420 5132.07 -0.12 -146.61 -0.10
9 0.9611 4707.14 0.13 -190.61 -0.12
10 0.9611 4706.51 0.04 -190.61 -0.07
11 0.9723 4447.76 -0.04 -209.85 0.19
12 0.9723 4447.65 0.02 -209.99 0.06
13 0.9724 4445.64 -0.01 -210.15 0.04
14 0.9724 4445.07 -0.04 -210.34 -0.12
15 0.9724 4444.98 0.04 -210.06 0.18
16 0.9725 4442.78 -0.20 -210.60 -0.23
17 1.0569 2441.05 0.00 -202.85 -0.07
18 2.3242 4507.27 0.01 762.19 -0.07
19 2.3242 4507.38 -0.00 762.33 0.03
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.
17CF60 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 44.058 44.082 44.039 ecceobj 0.100 0.104 0.098 incobj 12.716 12.715 12.716 qmin 38.968 38.709 39.057 qmax 49.534 49.756 49.268 amean 44.085 44.114 44.064 amin 43.734 43.768 43.706 amax 44.476 44.487 44.438 emean 0.100 0.105 0.098 emin 0.087 0.093 0.084 emax 0.114 0.119 0.110 imean 14.325 14.312 14.331 imin 13.801 13.781 13.815 imax 14.777 14.768 14.780 excite_mean 0.267 0.269 0.266 fracstop 1.000 1.000 1.000 cjmean 3.015 3.014 3.015 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 177.8 177.6 178.1 kozaiamp 180.0 180.0 179.9