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: 17BX236
# Created Tue Apr 1 01:11:02 2025
# Orbit generated from Bernstein formalism
# Fitting 21 observations of 21
# Arc: 0.90y
# First observation: 2016/04/02
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000054 0.023299 -0.000001 -0.000346 0.023176 0.000000
# Chi-squared of fit: 14.80 DOF: 36 RMS: 0.15
# Min/Max residuals: -0.41 0.29
# Exact a, adot, b, bdot, g, gdot:
1.490145E-05 2.312703E-02 -1.027301E-06 -3.442981E-04 2.360577E-02 -1.365318E-03
# Covariance matrix:
3.3275E-13 3.6255E-12 1.1101E-14 -7.7555E-14 1.7046E-12 1.4511E-10
3.6255E-12 3.4165E-10 7.8080E-13 -6.5542E-12 1.2373E-10 1.1927E-08
1.1101E-14 7.8080E-13 2.3835E-13 -2.9895E-13 2.9517E-13 2.7649E-11
-7.7555E-14 -6.5542E-12 -2.9895E-13 6.1222E-13 -2.3907E-12 -2.2953E-10
1.7046E-12 1.2373E-10 2.9517E-13 -2.3907E-12 4.6472E-11 4.3726E-09
1.4511E-10 1.1927E-08 2.7649E-11 -2.2953E-10 4.3726E-09 4.1834E-07
# lat0 lon0 xBary yBary zBary JD0
3.002920 -174.437865 -0.125287 0.051881 -0.986341 2457480.904541
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 322.00459 +/- 11.579
Argument of Peri: 150.85095 +/- 14.667
Long of Asc Node: 79.32076 +/- 0.043
Inclination: 3.05860 +/- 0.001
Eccentricity: 0.08429626 +/- 0.0203
Semi-Major Axis: 46.29019339 +/- 0.1463
Time of Perihelion: 2469621.6709 +/- 3699.6
Perihelion: 42.38810315 +/- 0.9484
Aphelion: 50.19228363 +/- 0.9522
Period (y) 314.9501 +/- 1.49
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -43.07978527 +/- 0.0122
Ecliptic Y -4.32345988 +/- 0.0012
Ecliptic Z 2.21921942 +/- 0.0006
Ecliptic XDOT 0.00041540 +/- 0.0001
Ecliptic YDOT -0.00266155 +/- 0.0000
Ecliptic ZDOT -0.00004817 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.35302918 +/- 0.0121
Geocenter to KBO 42.36251541 +/- 0.0122
# Hcoef: 9.24
The following table shows the complete astrometric record for 17BX236. 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 (17BX236) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.403752 12 25 10.81 +00 32 52.4 17BX236 T09 C~86uj 2016 04 02.444565 12 25 10.62 +00 32 53.4 17BX236 T09 C~86uk 2016 04 04.35736 12 25 02.38 +00 33 44.7 25.9g 17BX236 T09 C~8COq 2016 04 04.37012 12 25 02.34 +00 33 45.7 26.7g 17BX236 T09 C~8COq 2016 04 04.41508 12 25 02.13 +00 33 46.8 26.2g 17BX236 T09 C~8COq 2016 06 05.320050 12 21 55.22 +00 50 50.0 17BX236 T09 C~86uk 2016 06 05.356114 12 21 55.18 +00 50 50.0 17BX236 T09 C~86uk 2017 01 23.624307 12 33 53.88 -00 26 58.3 17BX236 T09 C~86uk 2017 01 23.630400 12 33 53.88 -00 26 58.5 17BX236 T09 C~86uk 2017 01 28.62228 12 33 46.32 -00 25 50.2 25.1z 17BX236 T09 C~81Bp 2017 01 28.64528 12 33 46.27 -00 25 49.8 25.0z 17BX236 T09 C~81Bp 2017 01 28.64799 12 33 46.25 -00 25 49.8 25.3z 17BX236 T09 C~81Bp 2017 02 02.61286 12 33 36.77 -00 24 30.2 25.6i 17BX236 T09 C~81Bp 2017 02 02.62764 12 33 36.74 -00 24 29.7 25.3i 17BX236 T09 C~81Bp 2017 02 02.63889 12 33 36.73 -00 24 29.5 25.2i 17BX236 T09 C~81Bp 2017 02 02.64725 12 33 36.69 -00 24 29.4 24.9i 17BX236 T09 C~81Bp 2017 02 23.53583 12 32 37.78 -00 17 07.2 26.0r 17BX236 T09 C~81Bp 2017 02 23.56555 12 32 37.67 -00 17 06.1 25.3r 17BX236 T09 C~81Bp 2017 02 23.57406 12 32 37.64 -00 17 05.9 25.7r 17BX236 T09 C~81Bp 2017 02 23.60801 12 32 37.53 -00 17 04.9 25.5r 17BX236 T09 C~81Bp 2017 02 23.63774 12 32 37.42 -00 17 04.6 26.1r 17BX236 T09 C~81Bp
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 0.12 0.00 0.16
2 0.0001 -3.01 0.02 -0.21 0.00
3 0.0053 -136.82 0.01 -2.04 -0.41
4 0.0054 -137.77 -0.03 -1.35 0.28
5 0.0055 -141.09 -0.17 -1.59 0.11
6 0.1750 -3120.80 0.01 -171.71 -0.05
7 0.1751 -3121.35 0.04 -171.95 -0.12
8 0.8110 8631.50 0.00 -190.39 0.02
9 0.8110 8631.58 0.23 -190.57 -0.19
10 0.8247 8500.18 0.11 -172.74 -0.08
11 0.8248 8499.33 -0.04 -172.67 -0.08
12 0.8248 8499.05 -0.23 -172.79 -0.21
13 0.8384 8336.69 0.01 -155.98 -0.07
14 0.8384 8336.08 -0.05 -155.70 0.17
15 0.8384 8335.86 0.15 -155.57 0.27
16 0.8384 8335.27 -0.14 -155.72 0.10
17 0.8956 7347.33 0.11 -99.51 -0.22
18 0.8957 7345.38 -0.10 -99.16 0.09
19 0.8957 7344.89 -0.10 -99.15 0.08
20 0.8958 7342.97 -0.03 -98.89 0.29
21 0.8959 7341.34 0.08 -99.26 -0.14
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.
17BX236 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.763 46.265 45.690 ecceobj 0.076 0.142 0.060 incobj 3.059 3.060 3.058 qmin 41.762 39.227 42.364 qmax 50.506 54.126 49.718 amean 46.013 46.536 45.934 amin 45.633 46.133 45.569 amax 46.405 46.970 46.326 emean 0.075 0.140 0.061 emin 0.062 0.126 0.048 emax 0.088 0.153 0.074 imean 1.477 1.331 1.504 imin 1.067 0.797 1.114 imax 1.884 1.836 1.896 excite_mean 0.079 0.142 0.066 fracstop 1.000 1.000 1.000 cjmean 3.119 3.108 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 217.5 234.2 206.1 kozaiamp 179.9 180.0 179.9