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: 17BF232
# Created Tue Apr 1 01:11:01 2025
# Orbit generated from Bernstein formalism
# Fitting 22 observations of 22
# Arc: 0.90y
# First observation: 2016/04/02
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000082 0.020903 -0.000001 0.000208 0.022265 0.000000
# Chi-squared of fit: 12.80 DOF: 38 RMS: 0.13
# Min/Max residuals: -0.25 0.30
# Exact a, adot, b, bdot, g, gdot:
1.458599E-05 2.085435E-02 3.294848E-07 2.104052E-04 2.263436E-02 1.656141E-03
# Covariance matrix:
7.3970E-13 4.6638E-12 2.3507E-14 -4.6318E-15 2.6064E-12 2.2245E-10
4.6638E-12 3.1893E-10 8.9442E-13 -1.4419E-13 1.1248E-10 1.1920E-08
2.3507E-14 8.9442E-13 2.0167E-13 -2.6590E-13 3.3397E-13 3.4275E-11
-4.6318E-15 -1.4419E-13 -2.6590E-13 5.3898E-13 -5.5410E-14 -5.5943E-12
2.6064E-12 1.1248E-10 3.3397E-13 -5.5410E-14 4.1349E-11 4.2818E-09
2.2245E-10 1.1920E-08 3.4275E-11 -5.5943E-12 4.2818E-09 4.4938E-07
# lat0 lon0 xBary yBary zBary JD0
1.529166 -174.494559 -0.125906 0.026496 -0.987263 2457480.883912
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 97.02258 +/- 7.129
Argument of Peri: 322.59720 +/- 6.460
Long of Asc Node: 116.69475 +/- 0.071
Inclination: 1.60228 +/- 0.001
Eccentricity: 0.08372281 +/- 0.0298
Semi-Major Axis: 44.41659207 +/- 0.2418
Time of Perihelion: 2428340.6970 +/- 2127.9
Perihelion: 40.69791012 +/- 1.3439
Aphelion: 48.13527402 +/- 1.3512
Period (y) 296.0234 +/- 2.42
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.93583958 +/- 0.0125
Ecliptic Y -4.45995585 +/- 0.0012
Ecliptic Z 1.17903244 +/- 0.0003
Ecliptic XDOT 0.00004346 +/- 0.0001
Ecliptic YDOT -0.00253703 +/- 0.0000
Ecliptic ZDOT 0.00003079 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.17201570 +/- 0.0124
Geocenter to KBO 44.18061070 +/- 0.0126
# Hcoef: 8.40
The following table shows the complete astrometric record for 17BF232. 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 (17BF232) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.383123 12 22 38.28 -00 46 58.8 17BF232 T09 C~81Bn 2016 04 02.515196 12 22 37.72 -00 46 55.3 17BF232 T09 C~81Bn 2016 06 04.25539 12 19 31.56 -00 28 05.2 24.6z 17BF232 T09 C~8COq 2016 06 04.26765 12 19 31.53 -00 28 05.2 24.6z 17BF232 T09 C~8COq 2016 06 04.28388 12 19 31.52 -00 28 05.2 24.5z 17BF232 T09 C~8COq 2016 06 04.30544 12 19 31.49 -00 28 05.1 24.8z 17BF232 T09 C~8COq 2016 06 04.32166 12 19 31.48 -00 28 05.2 24.8z 17BF232 T09 C~8COq 2016 06 04.33517 12 19 31.45 -00 28 05.1 24.7z 17BF232 T09 C~8COq 2016 06 04.33787 12 19 31.47 -00 28 04.9 24.8z 17BF232 T09 C~8COq 2016 06 05.311488 12 19 30.48 -00 28 00.6 17BF232 T09 C~81Bn 2016 06 05.351866 12 19 30.43 -00 28 00.4 17BF232 T09 C~81Bn 2017 01 23.586744 12 30 49.87 -01 40 27.7 17BF232 T09 C~81Bn 2017 01 23.620935 12 30 49.84 -01 40 27.4 17BF232 T09 C~81Bn 2017 01 28.59194 12 30 42.13 -01 39 26.8 24.7z 17BF232 T09 C~7xTo 2017 01 28.59808 12 30 42.10 -01 39 26.8 24.7z 17BF232 T09 C~7xTo 2017 01 28.61959 12 30 42.06 -01 39 26.5 25.1z 17BF232 T09 C~7xTo 2017 01 28.65069 12 30 42.01 -01 39 26.1 24.9z 17BF232 T09 C~7xTo 2017 02 02.636127 12 30 32.38 -01 38 14.0 17BF232 T09 C~81Bn 2017 02 02.644530 12 30 32.37 -01 38 13.9 17BF232 T09 C~81Bn 2017 02 23.52167 12 29 34.12 -01 31 22.8 25.4r 17BF232 T09 C~7xTo 2017 02 23.59748 12 29 33.87 -01 31 21.3 24.7r 17BF232 T09 C~7xTo 2017 02 23.62726 12 29 33.77 -01 31 20.1 25.6r 17BF232 T09 C~7xTo
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 -0.04
2 0.0004 -9.10 0.02 -0.11 -0.07
3 0.1721 -3020.80 -0.02 -68.30 0.23
4 0.1722 -3021.21 -0.22 -68.48 0.07
5 0.1722 -3021.35 -0.07 -68.54 0.05
6 0.1723 -3021.80 -0.14 -68.62 0.01
7 0.1723 -3021.90 0.05 -68.78 -0.10
8 0.1724 -3022.35 -0.17 -68.86 -0.16
9 0.1724 -3022.16 0.08 -68.56 0.15
10 0.1750 -3037.50 0.30 -70.49 -0.05
11 0.1751 -3038.27 0.18 -70.61 -0.07
12 0.8110 8044.20 -0.16 -30.14 -0.05
13 0.8111 8043.67 0.13 -30.04 -0.01
14 0.8247 7913.34 0.07 -20.06 0.20
15 0.8247 7912.92 -0.16 -20.24 0.02
16 0.8247 7912.25 -0.18 -20.20 0.02
17 0.8248 7911.40 -0.08 -20.13 0.05
18 0.8385 7750.04 0.15 -10.97 -0.09
19 0.8385 7749.86 0.28 -10.94 -0.07
20 0.8957 6783.87 -0.15 21.36 -0.08
21 0.8959 6779.83 0.13 21.26 -0.25
22 0.8959 6777.98 -0.03 21.77 0.24
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.
17BF232 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.985 45.076 43.530 ecceobj 0.088 0.166 0.041 incobj 1.604 1.604 1.603 qmin 39.145 36.279 40.753 qmax 49.505 54.720 46.946 amean 44.186 45.264 43.733 amin 43.835 44.875 43.374 amax 44.564 45.759 44.106 emean 0.095 0.176 0.045 emin 0.078 0.156 0.026 emax 0.111 0.197 0.065 imean 1.113 1.417 1.120 imin 0.251 0.171 0.248 imax 1.708 2.281 1.729 excite_mean 0.097 0.178 0.050 fracstop 1.000 1.000 1.000 cjmean 3.092 3.077 3.095 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 187.5 181.4 180.3 kozaiamp 180.0 180.0 180.0