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: 17BO239 # Created Wed Nov 27 02:10:46 2024 # Orbit generated from Bernstein formalism # Fitting 19 observations of 19 # Arc: 11.26d # First observation: 2017/01/21 # Last observation: 2017/02/01 Preliminary a, adot, b, bdot, g, gdot: 0.000000 0.028976 -0.000000 0.003102 0.025815 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 5.94 DOF: 33 RMS: 0.10 # Min/Max residuals: -0.30 0.21 # Exact a, adot, b, bdot, g, gdot: 1.600568E-05 2.485081E-02 1.494309E-06 2.734591E-03 2.508269E-02 -1.041388E-02 # Covariance matrix: 2.0843E-12 3.1946E-09 2.9667E-13 2.8429E-10 5.4224E-10 9.4442E-09 3.1946E-09 5.4160E-06 5.0123E-10 4.8086E-07 9.1651E-07 1.4861E-05 2.9667E-13 5.0123E-10 2.3423E-13 3.7503E-11 8.4865E-11 1.4368E-09 2.8429E-10 4.8086E-07 3.7503E-11 4.3141E-08 8.1382E-08 1.3214E-06 5.4224E-10 9.1651E-07 8.4865E-11 8.1382E-08 1.5515E-07 2.5861E-06 9.4442E-09 1.4861E-05 1.4368E-09 1.3214E-06 2.5861E-06 1.5715E-04 # lat0 lon0 xBary yBary zBary JD0 -13.549344 147.133075 0.434519 -0.207161 -0.860434 2457774.869391 # Heliocentric elements and errors Epoch: 2457770.5000 = 2017/01/17 Mean Anomaly: 320.38669 +/- 31.821 Argument of Peri: 22.25356 +/- 21.881 Long of Asc Node: 210.99500 +/- 0.953 Inclination: 14.63106 +/- 0.116 Eccentricity: 0.43852724 +/- 0.4961 Semi-Major Axis: 51.40928881 +/- 24.8974 Time of Perihelion: 2472585.4247 +/- 5079.7 Perihelion: 28.86491503 +/- 29.0823 Aphelion: 73.95366260 +/- 43.9673 Period (y) 368.6130 +/- 267.78 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -33.06583273 +/- 0.5112 Ecliptic Y 21.87452190 +/- 0.3303 Ecliptic Z -9.34039187 +/- 0.1467 Ecliptic XDOT -0.00059981 +/- 0.0012 Ecliptic YDOT -0.00284682 +/- 0.0007 Ecliptic ZDOT 0.00055643 +/- 0.0003 # Distances at JD0 (AU) Heliocenter to KBO 40.73189074 +/- 0.4526 Geocenter to KBO 39.86813924 +/- 0.6261 # Hcoef: 7.11
The following table shows the complete astrometric record for 17BO239. 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 (17BO239) followed by the observatory code and reference code for the source of the astrometry.
2017 01 21.36859 09 38 58.23 -00 17 29.6 22.9z 17BO239 T09 C~85Ir 2017 01 21.37737 09 38 58.19 -00 17 29.6 22.8z 17BO239 T09 C~85Ir 2017 01 21.38272 09 38 58.17 -00 17 29.6 22.8z 17BO239 T09 C~85Ir 2017 01 21.39346 09 38 58.13 -00 17 29.2 23.2z 17BO239 T09 C~85Ir 2017 01 21.40149 09 38 58.09 -00 17 29.2 22.9z 17BO239 T09 C~85Ir 2017 01 21.40956 09 38 58.05 -00 17 29.0 22.7z 17BO239 T09 C~85Ir 2017 01 21.62179 09 38 57.09 -00 17 25.9 22.8z 17BO239 T09 C~85Ir 2017 01 28.38578 09 38 26.59 -00 15 30.8 23.8g 17BO239 T09 C~85Ir 2017 01 28.39348 09 38 26.55 -00 15 30.4 23.8g 17BO239 T09 C~85Ir 2017 01 28.40405 09 38 26.50 -00 15 30.3 23.8g 17BO239 T09 C~85Ir 2017 01 28.41254 09 38 26.46 -00 15 30.3 24.0g 17BO239 T09 C~85Ir 2017 01 28.41673 09 38 26.44 -00 15 30.1 23.9g 17BO239 T09 C~85Ir 2017 02 01.47870 09 38 07.49 -00 14 09.8 22.8i 17BO239 T09 C~85Ir 2017 02 01.50891 09 38 07.35 -00 14 09.1 22.9i 17BO239 T09 C~85Ir 2017 02 01.51997 09 38 07.29 -00 14 08.8 22.9i 17BO239 T09 C~85Ir 2017 02 01.55002 09 38 07.15 -00 14 08.3 22.9i 17BO239 T09 C~85Ir 2017 02 01.57762 09 38 07.02 -00 14 07.6 22.9i 17BO239 T09 C~85Ir 2017 02 01.62394 09 38 06.81 -00 14 06.8 23.0i 17BO239 T09 C~85Ir 2017 02 01.62661 09 38 06.77 -00 14 06.4 22.9i 17BO239 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 0.05
2 0.0000 -0.57 -0.04 -0.20 -0.08
3 0.0000 -0.85 0.04 -0.30 -0.14
4 0.0001 -1.55 0.07 -0.12 0.13
5 0.0001 -2.11 0.06 -0.32 -0.01
6 0.0001 -2.75 -0.03 -0.34 0.04
7 0.0007 -17.35 -0.13 -2.23 -0.11
8 0.0192 -487.01 0.13 -46.60 -0.02
9 0.0192 -487.71 -0.01 -46.42 0.21
10 0.0193 -488.45 0.02 -46.58 0.11
11 0.0193 -489.02 0.07 -46.78 -0.04
12 0.0193 -489.37 0.03 -46.69 0.07
13 0.0304 -784.11 -0.00 -65.98 -0.12
14 0.0305 -786.33 0.04 -66.02 -0.03
15 0.0305 -787.28 -0.09 -66.04 -0.00
16 0.0306 -789.42 0.01 -66.27 -0.10
17 0.0307 -791.49 -0.01 -66.26 0.02
18 0.0308 -794.73 0.20 -66.56 -0.08
19 0.0308 -795.43 -0.30 -66.38 0.11
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.