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: 17BQ237 # Created Fri Nov 22 02:10:49 2024 # Orbit generated from Bernstein formalism # Fitting 18 observations of 18 # Arc: 1.95y # First observation: 2015/03/22 # Last observation: 2017/03/04 Preliminary a, adot, b, bdot, g, gdot: -0.000070 0.025780 -0.000025 0.005493 0.026202 0.000000 # Chi-squared of fit: 6.73 DOF: 30 RMS: 0.11 # Min/Max residuals: -0.27 0.20 # Exact a, adot, b, bdot, g, gdot: 1.570618E-05 2.557589E-02 3.387076E-06 5.438979E-03 2.590293E-02 -1.757456E-03 # Covariance matrix: 7.2560E-13 -1.0942E-12 2.8314E-14 -1.5660E-13 -5.9946E-13 -1.4034E-11 -1.0942E-12 5.3984E-12 -2.0386E-13 1.1000E-12 4.5154E-12 9.7778E-11 2.8314E-14 -2.0386E-13 6.1905E-13 -3.7733E-13 -2.0834E-13 -4.0000E-12 -1.5660E-13 1.1000E-12 -3.7733E-13 4.4822E-13 1.0515E-12 2.1209E-11 -5.9946E-13 4.5154E-12 -2.0834E-13 1.0515E-12 5.1401E-12 9.1307E-11 -1.4034E-11 9.7778E-11 -4.0000E-12 2.1209E-11 9.1307E-11 1.8741E-09 # lat0 lon0 xBary yBary zBary JD0 -13.205957 142.729338 -0.618480 -0.177424 -0.756676 2457103.880760 # Heliocentric elements and errors Epoch: 2457100.5000 = 2015/03/19 Mean Anomaly: 299.67738 +/- 0.435 Argument of Peri: 18.74478 +/- 0.589 Long of Asc Node: 189.69939 +/- 0.002 Inclination: 17.70834 +/- 0.001 Eccentricity: 0.05695441 +/- 0.0016 Semi-Major Axis: 40.40709136 +/- 0.0168 Time of Perihelion: 2472820.8615 +/- 112.9 Perihelion: 38.10572925 +/- 0.0668 Aphelion: 42.70845347 +/- 0.0673 Period (y) 256.8589 +/- 0.16 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -30.90587967 +/- 0.0026 Ecliptic Y 22.73903726 +/- 0.0020 Ecliptic Z -8.81940610 +/- 0.0008 Ecliptic XDOT -0.00160104 +/- 0.0000 Ecliptic YDOT -0.00218701 +/- 0.0000 Ecliptic ZDOT 0.00060220 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.37028242 +/- 0.0024 Geocenter to KBO 38.60566954 +/- 0.0034 # Hcoef: 8.22
The following table shows the complete astrometric record for 17BQ237. 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 (17BQ237) followed by the observatory code and reference code for the source of the astrometry.
2015 03 22.379982 09 23 12.77 +01 25 39.7 17BQ237 T09 C~83Er 2015 03 22.456321 09 23 12.51 +01 25 42.3 17BQ237 T09 C~83Er 2016 04 04.246919 09 28 31.04 +01 22 57.5 17BQ237 T09 C~83Er 2016 04 04.257515 09 28 31.01 +01 22 57.8 17BQ237 T09 C~83Er 2017 01 21.37737 09 39 43.42 +00 36 13.6 23.5z 17BQ237 T09 C~83Er 2017 01 21.38540 09 39 43.39 +00 36 13.6 23.8z 17BQ237 T09 C~83Er 2017 01 21.41223 09 39 43.25 +00 36 14.3 24.0z 17BQ237 T09 C~83Er 2017 01 28.39557 09 39 10.87 +00 38 32.5 24.6g 17BQ237 T09 C~83Er 2017 01 28.41673 09 39 10.74 +00 38 33.0 24.7g 17BQ237 T09 C~83Er 2017 01 28.43325 09 39 10.66 +00 38 33.4 25.1g 17BQ237 T09 C~83Er 2017 01 28.45922 09 39 10.56 +00 38 33.7 25.0g 17BQ237 T09 C~83Er 2017 03 04.37777 09 36 22.32 +00 55 10.4 23.9i 17BQ237 T09 C~83Er 2017 03 04.38044 09 36 22.29 +00 55 10.2 24.1i 17BQ237 T09 C~83Er 2017 03 04.38579 09 36 22.28 +00 55 10.6 23.6i 17BQ237 T09 C~83Er 2017 03 04.38848 09 36 22.26 +00 55 10.7 23.8i 17BQ237 T09 C~83Er 2017 03 04.39116 09 36 22.25 +00 55 10.7 23.7i 17BQ237 T09 C~83Er 2017 03 04.41073 09 36 22.17 +00 55 11.4 23.9i 17BQ237 T09 C~83Er 2017 03 04.41351 09 36 22.15 +00 55 11.6 23.7i 17BQ237 T09 C~83Er
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 -0.01
2 0.0002 -4.52 0.02 1.23 0.03
3 1.0373 4578.83 0.02 1358.91 0.01
4 1.0373 4578.31 -0.01 1359.05 -0.04
5 1.8371 15057.71 0.06 1905.30 0.07
6 1.8371 15057.28 0.20 1905.16 -0.03
7 1.8372 15055.06 -0.11 1905.16 0.10
8 1.8563 14548.02 0.16 1881.59 0.03
9 1.8564 14546.00 -0.25 1881.44 -0.06
10 1.8564 14544.73 -0.27 1881.44 -0.02
11 1.8565 14543.20 0.18 1881.25 -0.15
12 1.9521 11822.72 0.06 2023.83 0.13
13 1.9521 11822.36 -0.10 2023.50 -0.23
14 1.9521 11822.09 0.04 2023.83 0.05
15 1.9521 11821.77 -0.07 2023.83 0.02
16 1.9521 11821.63 -0.01 2023.78 -0.05
17 1.9522 11820.26 0.12 2024.07 0.04
18 1.9522 11819.91 -0.02 2024.16 0.11
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.
17BQ237 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 40.214 40.252 40.178 ecceobj 0.051 0.055 0.048 incobj 17.748 17.748 17.748 qmin 37.399 37.291 37.541 qmax 43.214 43.386 42.966 amean 40.201 40.248 40.164 amin 39.895 39.935 39.842 amax 40.522 40.576 40.475 emean 0.051 0.055 0.047 emin 0.037 0.041 0.031 emax 0.067 0.070 0.062 imean 18.344 18.337 18.350 imin 17.450 17.449 17.466 imax 19.108 19.107 19.125 excite_mean 0.319 0.319 0.318 fracstop 1.000 1.000 1.000 cjmean 2.939 2.939 2.939 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 178.0 179.3 176.9 kozaiamp 180.0 180.0 180.0