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 Tue Jan 21 02:11:10 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 19 observations of 22 # Arc: 2.32y # First observation: 2016/02/12 # Last observation: 2018/06/10 # Chi-squared of fit: 13.54 DOF: 32 RMS: 0.15 # Min/Max residuals: -0.21 0.32 # Exact a, adot, b, bdot, g, gdot: 1.310797E-05 1.831079E-02 -1.118898E-06 -1.141793E-03 2.123703E-02 -7.619621E-04 # Covariance matrix: 3.4281E-13 -3.1571E-13 -6.2968E-15 1.7709E-14 -2.6260E-13 -1.6524E-12 -3.1571E-13 3.8089E-13 8.8730E-15 -2.1676E-14 2.8751E-13 2.0489E-12 -6.2968E-15 8.8730E-15 1.0120E-13 -1.7171E-14 -4.7122E-15 4.5692E-14 1.7709E-14 -2.1676E-14 -1.7171E-14 9.6089E-15 -2.1198E-14 -1.2040E-13 -2.6260E-13 2.8751E-13 -4.7122E-15 -2.1198E-14 6.7055E-13 1.7014E-12 -1.6524E-12 2.0489E-12 4.5692E-14 -1.2040E-13 1.7014E-12 1.1299E-11 # 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: 209.55543 +/- 0.100 Argument of Peri: 49.30184 +/- 0.094 Long of Asc Node: 250.78853 +/- 0.001 Inclination: 12.73877 +/- 0.000 Eccentricity: 0.09584321 +/- 0.0001 Semi-Major Axis: 44.27266894 +/- 0.0052 Time of Perihelion: 2502395.6438 +/- 31.8 Perihelion: 40.02943408 +/- 0.0065 Aphelion: 48.51590379 +/- 0.0072 Period (y) 294.5858 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -38.16651334 +/- 0.0015 Ecliptic Y 27.35987567 +/- 0.0010 Ecliptic Z -10.18313186 +/- 0.0004 Ecliptic XDOT -0.00127078 +/- 0.0000 Ecliptic YDOT -0.00200069 +/- 0.0000 Ecliptic ZDOT -0.00012246 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 48.05147675 +/- 0.0013 Geocenter to KBO 47.08763095 +/- 0.0018 # Hcoef: 7.03
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 2024 12 31.41651 10 07 56.604 -02 10 38.13 23.9G 17CF60 G37 2024 12 31.46879 10 07 56.473 -02 10 38.16 17CF60 G37 2024 12 31.52114 10 07 56.338 -02 10 38.33 17CF60 G37
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 0.12 0.00 0.02
2 0.0001 0.00 0.01 0.00 -0.21
3 0.0002 0.00 0.17 0.00 -0.02
4 0.0003 0.00 0.32 0.00 -0.08
5 0.8683 0.00 0.16 0.00 -0.03
6 0.9419 0.00 0.32 0.00 0.11
7 0.9420 0.00 0.24 0.00 0.02
8 0.9420 0.00 0.00 0.00 -0.11
9 0.9611 0.00 0.23 0.00 -0.21
10 0.9611 0.00 0.16 0.00 -0.14
11 0.9723 0.00 0.17 0.00 0.13
12 0.9723 0.00 0.18 0.00 -0.01
13 0.9724 0.00 0.15 0.00 -0.02
14 0.9724 0.00 0.07 0.00 -0.16
15 0.9724 0.00 0.24 0.00 0.10
16 0.9725 0.00 -0.12 0.00 -0.21
17 1.0569 0.00 0.11 0.00 -0.13
18 2.3242 0.00 0.14 0.00 -0.12
19 2.3242 0.00 0.16 0.00 -0.02
20 8.8845 0.00 ( 6.07) 0.00 ( -4.06)
21 8.8847 0.00 ( 6.07) 0.00 ( -4.03)
22 8.8848 0.00 ( 6.01) 0.00 ( -4.15)
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 44.057 44.057 44.057 ecceobj 0.100 0.100 0.100 incobj 12.716 12.716 12.716 qmin 38.967 38.967 38.967 qmax 49.458 49.462 49.455 amean 44.084 44.084 44.084 amin 43.718 43.718 43.719 amax 44.472 44.472 44.473 emean 0.100 0.100 0.100 emin 0.087 0.087 0.087 emax 0.113 0.113 0.113 imean 14.325 14.325 14.325 imin 13.803 13.803 13.803 imax 14.763 14.763 14.763 excite_mean 0.267 0.267 0.267 fracstop 1.000 1.000 1.000 cjmean 3.015 3.015 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 177.9 177.9 177.9 kozaiamp 180.0 180.0 180.0