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 Fri Nov 22 02:10:49 2024 # Orbit generated from Bernstein formalism # Fitting 20 observations of 20 # Arc: 1.87y # First observation: 2015/03/22 # Last observation: 2017/02/01 Preliminary a, adot, b, bdot, g, gdot: -0.000089 0.024321 0.000008 -0.002418 0.024652 0.000000 # Chi-squared of fit: 9.11 DOF: 34 RMS: 0.12 # Min/Max residuals: -0.27 0.31 # Exact a, adot, b, bdot, g, gdot: 1.533188E-05 2.415721E-02 -1.378646E-06 -2.402384E-03 2.471843E-02 7.584437E-04 # Covariance matrix: 7.3203E-13 -1.0829E-12 -9.0470E-15 6.8933E-14 -5.3093E-13 -1.4122E-11 -1.0829E-12 7.8044E-12 5.1216E-14 -8.0303E-13 1.0100E-11 1.8331E-10 -9.0470E-15 5.1216E-14 6.1942E-13 -3.5007E-13 2.4187E-14 8.7682E-13 6.8933E-14 -8.0303E-13 -3.5007E-13 3.0588E-13 -1.1679E-12 -2.0215E-11 -5.3093E-13 1.0100E-11 2.4187E-14 -1.1679E-12 1.8324E-11 2.8406E-10 -1.4122E-11 1.8331E-10 8.7682E-13 -2.0215E-11 2.8406E-10 4.7576E-09 # lat0 lon0 xBary yBary zBary JD0 -14.373214 143.014889 -0.614689 -0.193548 -0.755815 2457103.887201 # Heliocentric elements and errors Epoch: 2457100.5000 = 2015/03/19 Mean Anomaly: 71.29180 +/- 0.909 Argument of Peri: 172.73229 +/- 1.264 Long of Asc Node: 255.33291 +/- 0.006 Inclination: 15.10287 +/- 0.000 Eccentricity: 0.04712112 +/- 0.0027 Semi-Major Axis: 41.76498270 +/- 0.0154 Time of Perihelion: 2437577.1679 +/- 248.8 Perihelion: 39.79696990 +/- 0.1132 Aphelion: 43.73299549 +/- 0.1134 Period (y) 269.9148 +/- 0.15 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -32.30065619 +/- 0.0054 Ecliptic Y 23.55488141 +/- 0.0041 Ecliptic Z -10.04262907 +/- 0.0017 Ecliptic XDOT -0.00162534 +/- 0.0000 Ecliptic YDOT -0.00213390 +/- 0.0000 Ecliptic ZDOT -0.00027853 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.21916092 +/- 0.0049 Geocenter to KBO 40.45563956 +/- 0.0070 # Hcoef: 7.72
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 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
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 0.03 0.00 -0.03
2 0.0001 -2.89 -0.02 0.61 0.01
3 1.0320 4386.75 -0.01 -337.65 0.06
4 1.0321 4385.53 0.01 -337.32 -0.00
5 1.7635 15675.06 0.11 -698.40 -0.02
6 1.8370 14206.81 -0.27 -1083.02 -0.15
7 1.8371 14206.38 -0.06 -1083.16 -0.19
8 1.8371 14205.75 -0.15 -1083.16 -0.11
9 1.8371 14205.26 -0.09 -1083.11 0.02
10 1.8371 14204.97 0.17 -1083.21 0.00
11 1.8371 14204.45 -0.18 -1083.07 0.17
12 1.8372 14204.22 -0.03 -1083.35 -0.06
13 1.8378 14189.15 0.09 -1085.31 0.25
14 1.8563 13721.98 0.16 -1143.05 0.01
15 1.8563 13721.38 0.31 -1143.15 -0.01
16 1.8563 13719.68 -0.16 -1143.29 -0.02
17 1.8564 13717.06 0.15 -1143.53 0.04
18 1.8675 13423.96 -0.10 -1169.77 -0.02
19 1.8677 13418.69 -0.08 -1170.15 0.02
20 1.8678 13418.69 0.12 -1170.15 0.04
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 41.568 41.608 41.529 ecceobj 0.050 0.046 0.053 incobj 15.083 15.083 15.084 qmin 38.735 38.878 38.519 qmax 44.570 44.503 44.663 amean 41.560 41.616 41.520 amin 41.249 41.288 41.206 amax 41.894 41.960 41.851 emean 0.051 0.049 0.055 emin 0.039 0.035 0.042 emax 0.065 0.062 0.068 imean 16.794 16.791 16.796 imin 16.186 16.170 16.182 imax 17.404 17.394 17.421 excite_mean 0.293 0.293 0.294 fracstop 1.000 1.000 1.000 cjmean 2.971 2.972 2.970 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 183.9 180.7 184.6 kozaiamp 180.0 180.0 180.0