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: 17CV56 # Created Wed Mar 26 01:11:06 2025 # Orbit generated from Bernstein formalism # Fitting 22 observations of 22 # Arc: 1.87y # First observation: 2015/03/22 # Last observation: 2017/02/01 Preliminary a, adot, b, bdot, g, gdot: 0.000045 0.019511 0.000012 0.003854 0.021072 0.000000 # Chi-squared of fit: 5.95 DOF: 38 RMS: 0.09 # Min/Max residuals: -0.19 0.18 # Exact a, adot, b, bdot, g, gdot: 1.337199E-05 1.912478E-02 2.621343E-06 3.868047E-03 2.190375E-02 9.909844E-04 # Covariance matrix: 2.9253E-13 -2.9607E-13 5.5037E-15 -2.7603E-14 -1.3154E-13 -3.6745E-12 -2.9607E-13 3.2372E-12 -1.0335E-14 4.1208E-13 4.1927E-13 5.5153E-11 5.5037E-15 -1.0335E-14 2.5366E-13 -1.4993E-13 -1.8541E-14 -3.4344E-13 -2.7603E-14 4.1208E-13 -1.4993E-13 1.7345E-13 8.2621E-14 7.5395E-12 -1.3154E-13 4.1927E-13 -1.8541E-14 8.2621E-14 4.3816E-13 1.0990E-11 -3.6745E-12 5.5153E-11 -3.4344E-13 7.5395E-12 1.0990E-11 1.0085E-09 # lat0 lon0 xBary yBary zBary JD0 -14.134468 140.607192 -0.646789 -0.183949 -0.731013 2457103.877264 # Heliocentric elements and errors Epoch: 2457100.5000 = 2015/03/19 Mean Anomaly: 129.27417 +/- 0.772 Argument of Peri: 172.49678 +/- 0.755 Long of Asc Node: 190.94043 +/- 0.003 Inclination: 18.03167 +/- 0.001 Eccentricity: 0.08819776 +/- 0.0010 Semi-Major Axis: 43.76136454 +/- 0.0121 Time of Perihelion: 2419130.2061 +/- 226.2 Perihelion: 39.90171007 +/- 0.0448 Aphelion: 47.62101902 +/- 0.0453 Period (y) 289.4973 +/- 0.12 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -35.21064885 +/- 0.0010 Ecliptic Y 28.07506995 +/- 0.0008 Ecliptic Z -11.14857684 +/- 0.0003 Ecliptic XDOT -0.00170454 +/- 0.0000 Ecliptic YDOT -0.00170204 +/- 0.0000 Ecliptic ZDOT 0.00043869 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 46.39278080 +/- 0.0009 Geocenter to KBO 45.65428897 +/- 0.0014 # Hcoef: 7.85
The following table shows the complete astrometric record for 17CV56. 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 (17CV56) followed by the observatory code and reference code for the source of the astrometry.
2015 03 22.376486 09 14 12.92 +01 11 20.8 17CV56 T09 C~83Ey 2015 03 22.40027 09 14 12.84 +01 11 21.3 24.5i 17CV56 T09 C~8ifR 2015 03 22.41123 09 14 12.81 +01 11 22.0 24.1i 17CV56 T09 C~8ifR 2015 03 22.42769 09 14 12.76 +01 11 22.2 24.0i 17CV56 T09 C~8ifR 2015 03 22.438718 09 14 12.74 +01 11 22.6 17CV56 T09 C~83Ey 2015 11 10.586966 09 24 59.22 +00 43 09.2 17CV56 T09 C~83Ey 2015 11 10.637751 09 24 59.26 +00 43 08.1 17CV56 T09 C~83Ey 2016 11 28.52476 09 29 21.22 +00 30 23.4 24.8r 17CV56 T09 C~83Ey 2016 11 28.56332 09 29 21.17 +00 30 22.9 24.8r 17CV56 T09 C~83Ey 2016 11 28.58020 09 29 21.15 +00 30 22.7 24.7r 17CV56 T09 C~83Ey 2016 11 28.61822 09 29 21.13 +00 30 22.2 24.7r 17CV56 T09 C~83Ey 2016 11 29.50691 09 29 20.44 +00 30 11.1 24.3i 17CV56 T09 C~83Ey 2016 11 29.62736 09 29 20.35 +00 30 09.7 24.7z 17CV56 T09 C~83Ey 2016 11 29.63007 09 29 20.34 +00 30 09.7 24.2z 17CV56 T09 C~83Ey 2016 11 29.65490 09 29 20.33 +00 30 09.4 24.0z 17CV56 T09 C~83Ey 2017 01 02.418269 09 28 09.38 +00 28 17.0 17CV56 T09 C~83Ey 2017 01 02.420936 09 28 09.37 +00 28 16.9 17CV56 T09 C~83Ey 2017 02 01.49516 09 26 13.75 +00 34 53.2 23.9i 17CV56 T09 C~83Ey 2017 02 01.50344 09 26 13.71 +00 34 53.4 24.8i 17CV56 T09 C~83Ey 2017 02 01.53643 09 26 13.58 +00 34 54.0 24.2i 17CV56 T09 C~83Ey 2017 02 01.54461 09 26 13.53 +00 34 54.2 24.1i 17CV56 T09 C~83Ey 2017 02 01.55276 09 26 13.49 +00 34 54.2 24.1i 17CV56 T09 C~83Ey
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 0.09 0.00 0.04
2 0.0001 -1.30 -0.01 0.11 -0.19
3 0.0001 -1.94 -0.11 0.63 0.18
4 0.0001 -2.71 -0.06 0.59 -0.09
5 0.0002 -3.12 0.09 0.88 0.04
6 0.6385 9750.50 -0.05 1375.90 0.03
7 0.6386 9751.41 0.05 1375.04 0.00
8 1.6897 13738.18 0.18 1860.74 0.08
9 1.6898 13737.61 -0.09 1860.03 -0.03
10 1.6898 13737.39 -0.19 1859.74 -0.04
11 1.6899 13737.26 -0.03 1859.18 -0.01
12 1.6923 13730.80 -0.13 1845.39 -0.14
13 1.6927 13729.95 0.08 1843.64 -0.00
14 1.6927 13729.80 -0.04 1843.59 -0.01
15 1.6928 13729.75 0.14 1843.26 0.05
16 1.7852 12747.89 0.05 1407.01 0.14
17 1.7852 12747.78 0.07 1406.87 0.03
18 1.8675 10969.91 0.02 1248.64 0.02
19 1.8676 10969.27 -0.05 1248.65 0.04
20 1.8677 10967.23 0.15 1248.62 0.04
21 1.8677 10966.45 -0.08 1248.58 0.00
22 1.8677 10965.88 -0.10 1248.39 -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.
17CV56 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 43.599 43.638 43.561 ecceobj 0.095 0.097 0.093 incobj 18.076 18.075 18.078 qmin 38.494 38.271 38.632 qmax 48.907 49.172 48.717 amean 43.571 43.612 43.533 amin 43.229 43.276 43.188 amax 43.951 43.992 43.904 emean 0.098 0.103 0.095 emin 0.086 0.087 0.082 emax 0.113 0.119 0.110 imean 18.230 18.214 18.240 imin 17.835 17.717 17.847 imax 18.568 18.660 18.606 excite_mean 0.328 0.329 0.327 fracstop 1.000 1.000 1.000 cjmean 2.965 2.964 2.965 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 182.1 186.0 181.1 kozaiamp 180.0 179.9 179.9