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: 17BB245 # Created Sun Nov 24 02:10:47 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 18 observations of 18 # Arc: 15.21y # First observation: 2002/01/10 # Last observation: 2017/03/29 # Chi-squared of fit: 7.29 DOF: 30 RMS: 0.11 # Min/Max residuals: -0.34 0.23 # Exact a, adot, b, bdot, g, gdot: 1.860815E-05 3.275481E-02 -5.640034E-06 -1.123353E-02 2.758201E-02 -9.271438E-03 # Covariance matrix: 2.9355E-13 -3.2758E-14 -2.4855E-16 4.5204E-15 -9.8276E-15 -2.1341E-14 -3.2758E-14 3.4695E-13 6.4120E-15 -1.2039E-13 9.3127E-14 5.6928E-13 -2.4855E-16 6.4120E-15 2.9306E-13 -2.1853E-14 2.0063E-15 1.0556E-14 4.5204E-15 -1.2039E-13 -2.1853E-14 4.3623E-14 -2.8882E-14 -1.9865E-13 -9.8276E-15 9.3127E-14 2.0063E-15 -2.8882E-14 4.0211E-13 1.3459E-13 -2.1341E-14 5.6928E-13 1.0556E-14 -1.9865E-13 1.3459E-13 9.3940E-13 # lat0 lon0 xBary yBary zBary JD0 -0.579891 121.661539 0.196039 -0.009776 -0.958859 2452284.872070 # Heliocentric elements and errors Epoch: 2452284.5000 = 2002/01/10 Mean Anomaly: 352.66682 +/- 0.003 Argument of Peri: 221.36962 +/- 0.006 Long of Asc Node: 299.70508 +/- 0.000 Inclination: 18.91971 +/- 0.000 Eccentricity: 0.63344809 +/- 0.0001 Semi-Major Axis: 92.49006051 +/- 0.0262 Time of Perihelion: 2458902.5580 +/- 135.2 Perihelion: 33.90240831 +/- 0.0128 Aphelion: 151.07771272 +/- 0.0436 Period (y) 889.5099 +/- 0.38 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -19.36514209 +/- 0.0004 Ecliptic Y 31.78211377 +/- 0.0007 Ecliptic Z -0.36714915 +/- 0.0000 Ecliptic XDOT -0.00228698 +/- 0.0000 Ecliptic YDOT -0.00249989 +/- 0.0000 Ecliptic ZDOT -0.00110548 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.21909171 +/- 0.0006 Geocenter to KBO 36.25573460 +/- 0.0008 # Hcoef: 8.92
The following table shows the complete astrometric record for 17BB245. 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 (17BB245) followed by the observatory code and reference code for the source of the astrometry.
2002 01 10.371327 08 15 04.98 +19 13 28.2 17BB245 T09 C~89UU 2002 01 10.395463 08 15 04.83 +19 13 28.6 17BB245 T09 C~89UU 2002 01 10.417025 08 15 04.72 +19 13 29.0 17BB245 T09 C~89UU 2002 01 11.532842 08 14 58.53 +19 13 41.3 17BB245 T09 C~89UU 2002 01 11.557108 08 14 58.39 +19 13 41.6 17BB245 T09 C~89UU 2016 01 09.601013 09 58 44.62 +01 37 14.3 17BB245 T09 C~89UU 2016 01 09.645099 09 58 44.44 +01 37 14.4 17BB245 T09 C~89UU 2017 01 23.448142 10 05 17.52 +00 13 58.5 17BB245 T09 C~89UU 2017 01 28.51088 10 04 52.31 +00 14 56.5 23.7z 17BB245 T09 C~89UU 2017 01 28.52565 10 04 52.22 +00 14 56.7 23.8z 17BB245 T09 C~89UU 2017 01 28.53902 10 04 52.16 +00 14 56.9 23.8z 17BB245 T09 C~89UU 2017 01 28.55243 10 04 52.08 +00 14 56.9 24.0z 17BB245 T09 C~89UU 2017 01 28.57125 10 04 51.98 +00 14 57.4 23.6z 17BB245 T09 C~89UU 2017 02 02.38415 10 04 26.98 +00 16 06.4 24.7r 17BB245 T09 C~89UU 2017 02 02.39961 10 04 26.90 +00 16 06.6 24.7r 17BB245 T09 C~89UU 2017 02 02.52479 10 04 26.22 +00 16 08.3 24.4r 17BB245 T09 C~89UU 2017 03 22.333160 10 00 15.21 +00 35 38.3 17BB245 T09 C~89UU 2017 03 29.242866 09 59 46.47 +00 38 51.9 17BB245 T09 C~89UU
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 -0.00 0.00 -0.17
2 0.0001 0.00 -0.22 0.00 -0.04
3 0.0001 0.00 -0.05 0.00 0.12
4 0.0032 0.00 0.13 0.00 0.03
5 0.0032 0.00 0.09 0.00 0.07
6 13.9965 0.00 -0.02 0.00 -0.02
7 13.9966 0.00 0.00 0.00 0.00
8 15.0365 0.00 0.18 0.00 -0.04
9 15.0503 0.00 0.14 0.00 0.11
10 15.0504 0.00 -0.06 0.00 0.12
11 15.0504 0.00 0.08 0.00 0.15
12 15.0505 0.00 -0.07 0.00 -0.03
13 15.0505 0.00 -0.10 0.00 0.23
14 15.0637 0.00 -0.07 0.00 -0.02
15 15.0637 0.00 -0.02 0.00 -0.06
16 15.0641 0.00 -0.10 0.00 -0.34
17 15.1950 0.00 -0.01 0.00 -0.00
18 15.2139 0.00 -0.01 0.00 -0.06
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.