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: 17BN239 # Created Tue Jan 21 02:11:09 2025 # Orbit generated from Bernstein formalism # Fitting 17 observations of 17 # Arc: 65.00d # First observation: 2016/11/28 # Last observation: 2017/02/01 Preliminary a, adot, b, bdot, g, gdot: 0.000000 0.021007 0.000003 -0.006952 0.022822 0.000000 # Chi-squared of fit: 9.98 DOF: 28 RMS: 0.14 # Min/Max residuals: -0.26 0.28 # Exact a, adot, b, bdot, g, gdot: 1.377561E-05 1.986624E-02 -3.819542E-06 -7.050775E-03 2.223710E-02 -1.776178E-04 # Covariance matrix: 4.8380E-13 -2.2735E-12 5.6350E-15 -3.2827E-13 8.3593E-13 2.3360E-10 -2.2735E-12 5.8245E-09 9.3642E-12 1.2046E-09 2.0210E-09 1.9521E-07 5.6350E-15 9.3642E-12 4.8823E-13 -1.0985E-12 3.4979E-12 3.9551E-10 -3.2827E-13 1.2046E-09 -1.0985E-12 2.8786E-10 3.9657E-10 3.2720E-08 8.3593E-13 2.0210E-09 3.4979E-12 3.9657E-10 7.3565E-10 7.8805E-08 2.3360E-10 1.9521E-07 3.9551E-10 3.2720E-08 7.8805E-08 1.0247E-05 # lat0 lon0 xBary yBary zBary JD0 -13.752142 147.578129 0.979319 -0.036302 -0.149148 2457721.123199 # Heliocentric elements and errors Epoch: 2457720.5000 = 2016/11/28 Mean Anomaly: 316.84150 +/- 129.749 Argument of Peri: 262.43271 +/- 146.896 Long of Asc Node: 293.02848 +/- 0.226 Inclination: 23.95888 +/- 0.127 Eccentricity: 0.04400538 +/- 0.1080 Semi-Major Axis: 46.58147000 +/- 0.1468 Time of Perihelion: 2471641.8716 +/- 41852.2 Perihelion: 44.53163471 +/- 5.0310 Aphelion: 48.63130528 +/- 5.0313 Period (y) 317.9274 +/- 1.50 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -36.48022076 +/- 0.0450 Ecliptic Y 24.32410327 +/- 0.0286 Ecliptic Z -10.69054632 +/- 0.0130 Ecliptic XDOT -0.00111691 +/- 0.0003 Ecliptic YDOT -0.00219345 +/- 0.0002 Ecliptic ZDOT -0.00083806 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 45.13043637 +/- 0.0396 Geocenter to KBO 44.96989596 +/- 0.0549 # Hcoef: 7.84
The following table shows the complete astrometric record for 17BN239. 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 (17BN239) followed by the observatory code and reference code for the source of the astrometry.
2016 11 28.62241 09 40 19.73 -00 37 39.0 24.4r 17BN239 T09 C~8Wl8 2016 11 28.62886 09 40 19.73 -00 37 38.8 24.7r 17BN239 T09 C~8Wl8 2016 11 28.64865 09 40 19.71 -00 37 39.1 24.8r 17BN239 T09 C~8Wl8 2017 01 21.36520 09 37 57.86 -00 43 07.4 23.8z 17BN239 T09 C~85Ir 2017 01 21.36859 09 37 57.85 -00 43 07.2 23.4z 17BN239 T09 C~85Ir 2017 01 21.37468 09 37 57.82 -00 43 07.1 23.6z 17BN239 T09 C~85Ir 2017 01 21.39346 09 37 57.73 -00 43 07.1 23.8z 17BN239 T09 C~85Ir 2017 01 21.62985 09 37 56.76 -00 43 04.7 23.8z 17BN239 T09 C~85Ir 2017 01 28.38299 09 37 27.91 -00 41 54.8 25.0g 17BN239 T09 C~85Ir 2017 01 28.38578 09 37 27.89 -00 41 54.8 25.0g 17BN239 T09 C~85Ir 2017 01 28.39348 09 37 27.86 -00 41 54.8 24.9g 17BN239 T09 C~85Ir 2017 01 28.40405 09 37 27.81 -00 41 54.6 24.8g 17BN239 T09 C~85Ir 2017 02 01.50891 09 37 09.71 -00 41 01.5 24.4i 17BN239 T09 C~85Ir 2017 02 01.55002 09 37 09.53 -00 41 01.0 23.8i 17BN239 T09 C~85Ir 2017 02 01.57494 09 37 09.42 -00 41 00.8 24.7i 17BN239 T09 C~85Ir 2017 02 01.57762 09 37 09.39 -00 41 00.5 24.9i 17BN239 T09 C~85Ir 2017 02 01.62661 09 37 09.18 -00 41 00.1 24.1i 17BN239 T09 C~85Ir
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 0.07 0.00 -0.25 2 0.0000 -0.07 0.03 0.19 0.09 3 0.0001 -0.25 -0.09 -0.19 0.17 4 0.1471 -1894.08 -0.03 -1024.02 -0.22 5 0.1471 -1894.29 -0.03 -1023.88 -0.04 6 0.1472 -1894.75 -0.10 -1023.94 -0.01 7 0.1472 -1896.02 -0.20 -1024.39 -0.22 8 0.1479 -1910.53 0.14 -1027.02 0.28 9 0.1664 -2341.64 0.18 -1106.55 0.17 10 0.1664 -2341.92 0.08 -1106.65 0.10 11 0.1664 -2342.34 0.17 -1106.81 0.03 12 0.1664 -2343.12 0.10 -1106.87 0.09 13 0.1776 -2616.70 -0.11 -1148.07 0.05 14 0.1778 -2619.41 -0.00 -1148.50 0.01 15 0.1778 -2621.04 0.08 -1148.87 -0.12 16 0.1778 -2621.56 -0.26 -1148.74 0.04 17 0.1780 -2624.66 -0.03 -1149.42 -0.17
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.
17BN239 quality flag:1 Type: SCATEXTD SCATNEAR SCATEXTD axisobj 46.361 57.051 46.063 ecceobj 0.036 0.398 0.049 incobj 23.945 23.591 24.150 qmin 44.017 33.570 43.142 qmax 49.017 81.544 49.306 amean 46.403 56.930 46.113 amin 46.044 56.272 45.755 amax 46.776 57.817 46.477 emean 0.038 0.394 0.050 emin 0.028 0.376 0.040 emax 0.048 0.411 0.061 imean 25.549 25.222 25.759 imin 25.330 24.615 25.520 imax 25.766 25.934 25.982 excite_mean 0.433 0.580 0.437 fracstop 1.000 1.000 1.000 cjmean 2.887 2.814 2.879 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 195.6 193.5 184.4 kozaiamp 180.0 179.9 180.0