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: 17BK233 # Created Fri Nov 1 01:10:30 2024 # Orbit generated from Bernstein formalism # Fitting 15 observations of 15 # Arc: 0.90y # First observation: 2016/04/02 # Last observation: 2017/02/23 Preliminary a, adot, b, bdot, g, gdot: -0.000042 0.017892 -0.000002 0.001808 0.020336 0.000000 # Chi-squared of fit: 4.00 DOF: 24 RMS: 0.09 # Min/Max residuals: -0.20 0.21 # Exact a, adot, b, bdot, g, gdot: 1.397277E-05 1.778758E-02 1.439529E-06 1.820549E-03 2.062301E-02 -2.012795E-03 # Covariance matrix: 7.3657E-13 3.6728E-12 2.8066E-15 2.9009E-13 2.2993E-12 2.1077E-10 3.6728E-12 3.3911E-10 -2.6260E-13 1.9500E-11 1.2386E-10 1.4350E-08 2.8066E-15 -2.6260E-13 4.5495E-13 -5.6977E-13 -7.6200E-14 -1.0307E-11 2.9009E-13 1.9500E-11 -5.6977E-13 2.0028E-12 7.2922E-12 8.3363E-10 2.2993E-12 1.2386E-10 -7.6200E-14 7.2922E-12 4.7814E-11 5.3575E-09 2.1077E-10 1.4350E-08 -1.0307E-11 8.3363E-10 5.3575E-09 6.1310E-07 # lat0 lon0 xBary yBary zBary JD0 2.915927 -173.980187 -0.117213 0.050435 -0.987404 2457480.894196 # Heliocentric elements and errors Epoch: 2457480.5000 = 2016/04/02 Mean Anomaly: 255.88572 +/- 9.615 Argument of Peri: 142.72654 +/- 8.746 Long of Asc Node: 160.06104 +/- 0.012 Inclination: 6.47365 +/- 0.003 Eccentricity: 0.11616154 +/- 0.0374 Semi-Major Axis: 47.55958909 +/- 0.3941 Time of Perihelion: 2492127.3177 +/- 3170.5 Perihelion: 42.03499377 +/- 1.8134 Aphelion: 53.08418441 +/- 1.8332 Period (y) 327.9936 +/- 4.08 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -49.13435161 +/- 0.0161 Ecliptic Y -5.30160038 +/- 0.0017 Ecliptic Z 2.46678283 +/- 0.0008 Ecliptic XDOT 0.00052538 +/- 0.0001 Ecliptic YDOT -0.00232611 +/- 0.0000 Ecliptic ZDOT 0.00022779 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 49.48107206 +/- 0.0160 Geocenter to KBO 48.48953044 +/- 0.0163 # Hcoef: 7.63
The following table shows the complete astrometric record for 17BK233. 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 (17BK233) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.393407 12 26 43.29 +00 17 13.6 17BK233 T09 C~83Eq 2016 04 02.444565 12 26 43.10 +00 17 14.9 17BK233 T09 C~83Eq 2016 06 05.326381 12 23 47.57 +00 34 53.5 17BK233 T09 C~83Eq 2016 06 05.358251 12 23 47.55 +00 34 53.5 17BK233 T09 C~83Eq 2017 01 23.630400 12 34 04.97 -00 26 56.8 17BK233 T09 C~83Eq 2017 01 28.60076 12 33 58.14 -00 25 49.2 24.6z 17BK233 T09 C~7zpa 2017 01 28.62228 12 33 58.11 -00 25 49.2 23.9z 17BK233 T09 C~7zpa 2017 01 28.64528 12 33 58.06 -00 25 48.7 24.3z 17BK233 T09 C~7zpa 2017 01 28.64799 12 33 58.06 -00 25 48.5 24.4z 17BK233 T09 C~7zpa 2017 02 02.61286 12 33 49.53 -00 24 30.9 24.9i 17BK233 T09 C~7zpa 2017 02 02.61925 12 33 49.50 -00 24 30.7 24.5i 17BK233 T09 C~7zpa 2017 02 02.63889 12 33 49.47 -00 24 30.4 24.2i 17BK233 T09 C~7zpa 2017 02 02.64725 12 33 49.45 -00 24 30.2 24.4i 17BK233 T09 C~7zpa 2017 02 23.535818 12 32 56.93 -00 17 29.0 17BK233 T09 C~83Eq 2017 02 23.607996 12 32 56.70 -00 17 27.3 17BK233 T09 C~83Eq
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 -0.01 2 0.0001 -3.13 0.06 0.07 0.05 3 0.1750 -2840.19 -0.12 -69.10 -0.00 4 0.1751 -2840.46 0.12 -69.22 -0.04 5 0.8111 7136.03 0.21 186.79 0.04 6 0.8247 7015.06 -0.07 208.36 0.06 7 0.8247 7014.65 0.12 208.19 -0.20 8 0.8248 7013.76 -0.12 208.35 -0.13 9 0.8248 7013.68 -0.13 208.53 0.05 10 0.8384 6865.31 0.16 229.20 0.03 11 0.8384 6864.81 -0.12 229.21 0.01 12 0.8385 6864.28 0.01 229.31 0.04 13 0.8385 6863.92 -0.07 229.37 0.07 14 0.8957 5972.92 0.04 304.61 0.01 15 0.8959 5969.07 -0.02 304.80 0.02
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.
17BK233 quality flag:2 Type: CLASSICAL SCATNEAR CLASSICAL axisobj 47.049 48.685 46.652 ecceobj 0.120 0.227 0.062 incobj 6.506 6.505 6.508 qmin 40.925 37.275 43.361 qmax 54.159 61.207 50.630 amean 47.335 48.990 46.896 amin 46.926 48.493 46.516 amax 47.803 49.513 47.295 emean 0.118 0.224 0.059 emin 0.104 0.212 0.047 emax 0.133 0.237 0.071 imean 6.005 6.103 5.917 imin 5.647 5.599 5.612 imax 6.433 6.613 6.247 excite_mean 0.158 0.248 0.119 fracstop 1.000 1.000 1.000 cjmean 3.112 3.086 3.120 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 183.4 187.0 183.6 kozaiamp 180.0 180.0 180.0