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: 17BR236 # Created Wed Mar 26 01:11:05 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 27 observations of 27 # Arc: 9.93y # First observation: 2015/03/22 # Last observation: 2025/02/23 # Chi-squared of fit: 14.74 DOF: 48 RMS: 0.13 # Min/Max residuals: -0.27 0.30 # Exact a, adot, b, bdot, g, gdot: 1.520628E-05 2.415747E-02 -1.042892E-06 -2.402631E-03 2.471712E-02 7.518662E-04 # Covariance matrix: 6.4818E-13 -4.9363E-13 -6.4978E-14 4.8750E-14 2.2958E-14 -1.6845E-12 -4.9363E-13 6.3087E-13 9.0043E-14 -6.6723E-14 -3.1007E-13 2.2385E-12 -6.4978E-14 9.0043E-14 1.1552E-13 -2.8496E-14 -4.8927E-14 3.2365E-13 4.8750E-14 -6.6723E-14 -2.8496E-14 1.4498E-14 3.5561E-14 -2.3977E-13 2.2958E-14 -3.1007E-13 -4.8927E-14 3.5561E-14 4.0085E-13 -1.1364E-12 -1.6845E-12 2.2385E-12 3.2365E-13 -2.3977E-13 -1.1364E-12 8.0387E-12 # lat0 lon0 xBary yBary zBary JD0 -14.373214 143.014889 -0.614689 -0.193548 -0.755815 2457103.887201 # Heliocentric elements and errors Epoch: 2457104.5000 = 2015/03/23 Mean Anomaly: 71.03432 +/- 0.114 Argument of Peri: 173.03382 +/- 0.119 Long of Asc Node: 255.33443 +/- 0.001 Inclination: 15.10302 +/- 0.000 Eccentricity: 0.04690750 +/- 0.0001 Semi-Major Axis: 41.77422162 +/- 0.0067 Time of Perihelion: 2437645.2226 +/- 31.7 Perihelion: 39.81469726 +/- 0.0088 Aphelion: 43.73374597 +/- 0.0093 Period (y) 270.0043 +/- 0.07 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -32.30231929 +/- 0.0008 Ecliptic Y 23.55614029 +/- 0.0006 Ecliptic Z -10.04314956 +/- 0.0003 Ecliptic XDOT -0.00162487 +/- 0.0000 Ecliptic YDOT -0.00213446 +/- 0.0000 Ecliptic ZDOT -0.00027839 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.22128212 +/- 0.0007 Geocenter to KBO 40.45781515 +/- 0.0010 # Hcoef: 7.79
The following table shows the complete astrometric record for 17BR236. 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 (17BR236) followed by the observatory code and reference code for the source of the astrometry.
2015 03 22.386423 09 22 47.03 +00 13 57.9 17BR236 T09 C~81Bo 2015 03 22.435986 09 22 46.86 +00 13 59.4 17BR236 T09 C~81Bo 2016 04 02.333733 09 27 17.13 -00 14 35.9 17BR236 T09 C~81Bo 2016 04 02.360442 09 27 17.06 -00 14 35.2 17BR236 T09 C~81Bo 2016 11 28.51071 09 39 48.90 -01 14 00.9 23.9r 17BR236 T09 C~8eW4 2016 11 28.57812 09 39 48.85 -01 14 02.2 24.2r 17BR236 T09 C~8eW4 2016 11 28.62886 09 39 48.83 -01 14 03.1 24.4r 17BR236 T09 C~8eW4 2016 11 28.64374 09 39 48.82 -01 14 03.6 24.4r 17BR236 T09 C~8eW4 2016 12 25.500066 09 39 01.35 -01 19 51.5 17BR236 T09 C~81Bo 2017 01 21.36520 09 37 20.86 -01 18 12.3 23.5z 17BR236 T09 C~81Bo 2017 01 21.37468 09 37 20.83 -01 18 12.3 23.5z 17BR236 T09 C~81Bo 2017 01 21.38272 09 37 20.79 -01 18 12.1 23.2z 17BR236 T09 C~81Bo 2017 01 21.39079 09 37 20.76 -01 18 11.9 23.6z 17BR236 T09 C~81Bo 2017 01 21.39882 09 37 20.74 -01 18 11.9 22.9z 17BR236 T09 C~81Bo 2017 01 21.40149 09 37 20.71 -01 18 11.6 23.1z 17BR236 T09 C~81Bo 2017 01 21.40688 09 37 20.69 -01 18 11.8 23.2z 17BR236 T09 C~81Bo 2017 01 21.62985 09 37 19.70 -01 18 08.9 23.9z 17BR236 T09 C~81Bo 2017 01 28.38299 09 36 49.07 -01 16 36.1 25.8g 17BR236 T09 C~81Bo 2017 01 28.39348 09 36 49.03 -01 16 36.0 25.5g 17BR236 T09 C~81Bp 2017 01 28.41043 09 36 48.92 -01 16 35.6 25.5g 17BR236 T09 C~81Bp 2017 01 28.45084 09 36 48.75 -01 16 35.0 25.0g 17BR236 T09 C~81Bp 2017 02 01.50891 09 36 29.74 -01 15 27.3 23.3i 17BR236 T09 C~81Bp 2017 02 01.58031 09 36 29.40 -01 15 26.0 22.6i 17BR236 T09 C~81Bp 2017 02 01.58299 09 36 29.40 -01 15 26.0 22.9i 17BR236 T09 C~81Bp 2025 02 23.264920 10 15 06.136 -05 36 19.95 23.8G 17BR236 G37 C~8ifL 2025 02 23.312060 10 15 05.892 -05 36 19.16 17BR236 G37 C~8ifL 2025 02 23.359010 10 15 05.668 -05 36 17.99 17BR236 G37 C~8ifL
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 -0.11
2 0.0001 0.00 -0.02 0.00 -0.06
3 1.0320 0.00 -0.09 0.00 0.08
4 1.0321 0.00 -0.09 0.00 0.02
5 1.6896 0.00 -0.09 0.00 -0.12
6 1.6898 0.00 -0.21 0.00 -0.01
7 1.6899 0.00 -0.02 0.00 0.15
8 1.6900 0.00 -0.02 0.00 -0.04
9 1.7635 0.00 0.22 0.00 -0.06
10 1.8370 0.00 -0.27 0.00 -0.04
11 1.8371 0.00 -0.08 0.00 -0.16
12 1.8371 0.00 -0.14 0.00 -0.05
13 1.8371 0.00 -0.05 0.00 0.05
14 1.8371 0.00 0.20 0.00 -0.04
15 1.8371 0.00 -0.07 0.00 0.23
16 1.8372 0.00 -0.01 0.00 -0.03
17 1.8378 0.00 0.20 0.00 0.22
18 1.8563 0.00 0.16 0.00 -0.03
19 1.8563 0.00 0.30 0.00 -0.09
20 1.8563 0.00 -0.15 0.00 0.05
21 1.8564 0.00 0.16 0.00 0.01
22 1.8675 0.00 -0.11 0.00 0.03
23 1.8677 0.00 -0.07 0.00 0.07
24 1.8678 0.00 0.12 0.00 0.02
25 9.9271 0.00 0.19 0.00 0.28
26 9.9272 0.00 -0.10 0.00 -0.14
27 9.9274 0.00 -0.11 0.00 -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.
17BR236 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 41.577 41.577 41.577 ecceobj 0.049 0.049 0.049 incobj 15.083 15.083 15.083 qmin 38.738 38.717 38.763 qmax 44.551 44.570 44.554 amean 41.569 41.569 41.569 amin 41.258 41.258 41.256 amax 41.901 41.901 41.898 emean 0.051 0.051 0.051 emin 0.039 0.039 0.039 emax 0.065 0.065 0.064 imean 16.794 16.794 16.794 imin 16.184 16.182 16.184 imax 17.400 17.398 17.400 excite_mean 0.293 0.293 0.293 fracstop 1.000 1.000 1.000 cjmean 2.971 2.971 2.971 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 183.9 184.0 183.8 kozaiamp 180.0 180.0 179.9