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: 17BP236 # Created Sun Dec 22 02:10:55 2024 # Orbit generated from Bernstein formalism # Fitting 21 observations of 21 # Arc: 1.96y # First observation: 2017/01/26 # Last observation: 2019/01/11 Preliminary a, adot, b, bdot, g, gdot: -0.000030 0.032374 -0.000006 0.008548 0.030102 0.000000 # Chi-squared of fit: 8.11 DOF: 36 RMS: 0.11 # Min/Max residuals: -0.22 0.23 # Exact a, adot, b, bdot, g, gdot: 1.704898E-05 3.246628E-02 4.372115E-06 8.587385E-03 3.041447E-02 1.204813E-03 # Covariance matrix: 2.1319E-13 -3.2347E-13 3.0796E-15 -4.5333E-14 1.0907E-13 -2.8133E-12 -3.2347E-13 2.0626E-12 -6.6139E-14 4.7433E-13 2.3705E-13 2.9739E-11 3.0796E-15 -6.6139E-14 1.1405E-13 -1.0761E-13 -1.8366E-14 -1.1202E-12 -4.5333E-14 4.7433E-13 -1.0761E-13 3.2105E-13 8.7264E-14 7.7413E-12 1.0907E-13 2.3705E-13 -1.8366E-14 8.7264E-14 2.9549E-13 5.5264E-12 -2.8133E-12 2.9739E-11 -1.1202E-12 7.7413E-12 5.5264E-12 4.8572E-10 # lat0 lon0 xBary yBary zBary JD0 -11.422548 151.874120 0.426370 -0.175913 -0.871537 2457780.057001 # Heliocentric elements and errors Epoch: 2457780.5000 = 2017/01/27 Mean Anomaly: 25.21507 +/- 0.557 Argument of Peri: 294.17046 +/- 0.630 Long of Asc Node: 187.63727 +/- 0.002 Inclination: 18.29294 +/- 0.001 Eccentricity: 0.05198977 +/- 0.0004 Semi-Major Axis: 35.40113194 +/- 0.0048 Time of Perihelion: 2452391.8278 +/- 119.1 Perihelion: 33.56063512 +/- 0.0146 Aphelion: 37.24162877 +/- 0.0148 Period (y) 210.6366 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -29.00893279 +/- 0.0005 Ecliptic Y 15.98311422 +/- 0.0003 Ecliptic Z -6.51135339 +/- 0.0001 Ecliptic XDOT -0.00160363 +/- 0.0000 Ecliptic YDOT -0.00246185 +/- 0.0000 Ecliptic ZDOT 0.00073617 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 33.75464182 +/- 0.0005 Geocenter to KBO 32.87908657 +/- 0.0006 # Hcoef: 8.42
The following table shows the complete astrometric record for 17BP236. 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 (17BP236) followed by the observatory code and reference code for the source of the astrometry.
2017 01 26.55620 09 59 16.74 +00 07 13.4 23.2z 17BP236 T09 C~81Bo 2017 01 26.55888 09 59 16.73 +00 07 13.2 23.4z 17BP236 T09 C~81Bo 2017 01 26.57229 09 59 16.66 +00 07 13.6 23.4z 17BP236 T09 C~81Bo 2017 01 26.58570 09 59 16.58 +00 07 14.3 23.1z 17BP236 T09 C~81Bo 2017 02 02.38198 09 58 40.82 +00 10 10.6 23.8r 17BP236 T09 C~81Bo 2017 02 02.39743 09 58 40.73 +00 10 11.1 23.7r 17BP236 T09 C~81Bo 2017 02 02.58245 09 58 39.71 +00 10 16.3 23.2i 17BP236 T09 C~81Bo 2017 03 22.24385 09 54 28.40 +00 39 28.1 24.3g 17BP236 T09 C~81Bo 2017 03 22.24805 09 54 28.36 +00 39 28.1 24.3g 17BP236 T09 C~81Bo 2017 03 22.33107 09 54 28.00 +00 39 31.8 24.1g 17BP236 T09 C~81Bo 2017 04 27.32671 09 52 47.56 +01 01 31.8 23.6i 17BP236 T09 C~81Bo 2017 04 27.32955 09 52 47.56 +01 01 32.0 23.5i 17BP236 T09 C~81Bo 2017 04 27.33527 09 52 47.55 +01 01 32.2 23.8i 17BP236 T09 C~81Bo 2017 04 27.33816 09 52 47.55 +01 01 32.3 23.7i 17BP236 T09 C~81Bo 2017 04 27.34103 09 52 47.56 +01 01 32.5 23.7i 17BP236 T09 C~81Bo 2018 01 17.50222 10 07 40.43 -00 07 35.7 23.4i 17BP236 T09 C~81Bo 2018 01 17.53998 10 07 40.26 -00 07 35.2 23.4i 17BP236 T09 C~81Bo 2018 01 17.56687 10 07 40.14 -00 07 34.7 23.6i 17BP236 T09 C~81Bo 2018 01 17.59100 10 07 40.02 -00 07 34.0 23.8i 17BP236 T09 C~81Bo 2019 01 11.436722 10 15 42.97 -00 20 43.4 17BP236 T09 C~81Bo 2019 01 11.490304 10 15 42.75 -00 20 42.7 17BP236 T09 C~81Bo
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 -0.04 0.00 0.02
2 0.0000 -0.07 0.11 -0.24 -0.21
3 0.0000 -1.19 0.09 -0.23 -0.13
4 0.0001 -2.56 -0.19 0.00 0.17
5 0.0187 -566.72 0.13 -23.07 0.01
6 0.0187 -568.16 0.03 -23.08 0.04
7 0.0192 -584.31 -0.04 -23.58 0.04
8 0.1497 -4729.64 0.12 294.83 0.14
9 0.1497 -4730.21 -0.12 294.62 -0.13
10 0.1500 -4736.56 -0.11 296.19 0.23
11 0.2485 -6611.65 -0.00 1004.59 -0.22
12 0.2485 -6611.72 0.00 1004.77 -0.09
13 0.2485 -6611.93 -0.06 1004.91 -0.09
14 0.2485 -6611.97 -0.02 1005.00 -0.06
15 0.2486 -6611.90 0.13 1005.24 0.12
16 0.9745 7390.42 -0.05 1818.78 0.11
17 0.9746 7387.85 0.05 1818.35 -0.03
18 0.9747 7385.99 0.09 1818.19 0.01
19 0.9748 7384.05 -0.14 1818.21 0.22
20 1.9572 14466.68 0.08 3625.35 -0.04
21 1.9574 14463.32 -0.05 3624.85 -0.08
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.
17BP236 quality flag:2 Type: CENTAURR SCATNEAR SCATNEAR axisobj 35.336 35.360 35.313 ecceobj 0.052 0.053 0.050 incobj 18.341 18.341 18.342 qmin 29.991 31.873 30.663 qmax 41.234 39.359 43.898 amean 35.448 35.349 35.475 amin 34.773 34.963 34.935 amax 36.079 35.943 37.623 emean 0.053 0.051 0.055 emin 0.001 0.008 0.015 emax 0.155 0.101 0.167 imean 16.425 16.553 16.772 imin 13.690 14.641 14.854 imax 18.165 18.197 18.760 excite_mean 0.289 0.290 0.295 fracstop 0.787 1.000 1.000 cjmean 2.927 2.927 2.924 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 175.4 178.2 177.0 kozaiamp 180.0 180.0 180.0