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 Wed Nov 27 02:10:46 2024 # Orbit generated from Bernstein formalism # Fitting 14 observations of 14 # Arc: 11.26d # First observation: 2017/01/21 # Last observation: 2017/02/01 Preliminary a, adot, b, bdot, g, gdot: 0.000000 0.023899 0.000001 -0.006880 0.023246 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 7.46 DOF: 23 RMS: 0.13 # Min/Max residuals: -0.24 0.29 # Exact a, adot, b, bdot, g, gdot: 1.445833E-05 2.065920E-02 -3.987262E-06 -7.159750E-03 2.266949E-02 -9.181416E-03 # Covariance matrix: 2.7682E-12 3.8584E-09 4.0687E-13 3.5217E-10 6.5185E-10 7.1523E-09 3.8584E-09 5.9729E-06 6.2750E-10 5.4393E-07 1.0060E-06 1.0287E-05 4.0687E-13 6.2750E-10 3.2597E-13 4.7324E-11 1.0574E-10 1.1589E-09 3.5217E-10 5.4393E-07 4.7324E-11 5.0164E-08 9.1608E-08 9.1377E-07 6.5185E-10 1.0060E-06 1.0574E-10 9.1608E-08 1.6948E-07 1.7813E-06 7.1523E-09 1.0287E-05 1.1589E-09 9.1377E-07 1.7813E-06 1.0462E-04 # lat0 lon0 xBary yBary zBary JD0 -14.035985 147.035825 0.433070 -0.214633 -0.859331 2457774.866001 # Heliocentric elements and errors Epoch: 2457770.5000 = 2017/01/17 Mean Anomaly: 325.27044 +/- 28.679 Argument of Peri: 299.94567 +/- 20.664 Long of Asc Node: 292.16290 +/- 3.950 Inclination: 23.48367 +/- 2.118 Eccentricity: 0.46037129 +/- 0.4722 Semi-Major Axis: 60.13885595 +/- 30.8906 Time of Perihelion: 2474203.9180 +/- 4882.3 Perihelion: 32.45265310 +/- 32.9269 Aphelion: 87.82505879 +/- 53.3046 Period (y) 466.3811 +/- 359.34 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -36.41671727 +/- 0.6520 Ecliptic Y 24.12610802 +/- 0.4229 Ecliptic Z -10.69878149 +/- 0.1943 Ecliptic XDOT -0.00027627 +/- 0.0011 Ecliptic YDOT -0.00279953 +/- 0.0006 Ecliptic ZDOT -0.00057001 +/- 0.0003 # Distances at JD0 (AU) Heliocenter to KBO 44.97455181 +/- 0.5765 Geocenter to KBO 44.11215602 +/- 0.8011 # Hcoef: 7.81
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.
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 -0.01 0.00 -0.21
2 0.0000 -0.21 -0.01 0.14 -0.02
3 0.0000 -0.67 -0.08 0.08 -0.00
4 0.0001 -1.94 -0.18 -0.37 -0.21
5 0.0007 -16.45 0.16 -2.96 0.29
6 0.0192 -447.69 0.13 -81.50 0.18
7 0.0192 -447.97 0.03 -81.60 0.11
8 0.0192 -448.39 0.12 -81.75 0.04
9 0.0193 -449.17 0.05 -81.81 0.09
10 0.0305 -722.80 -0.09 -122.38 0.03
11 0.0306 -725.52 0.02 -122.81 -0.01
12 0.0307 -727.14 0.10 -123.17 -0.13
13 0.0307 -727.66 -0.24 -123.04 0.03
14 0.0308 -730.76 -0.00 -123.71 -0.19
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.