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: 17BH232
# Created Mon Apr 28 01:11:02 2025
# Orbit generated from Bernstein formalism
# Fitting 25 observations of 25
# Arc: 0.90y
# First observation: 2016/04/02
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000039 0.021101 -0.000000 0.000465 0.022448 0.000000
# Chi-squared of fit: 11.07 DOF: 44 RMS: 0.12
# Min/Max residuals: -0.29 0.24
# Exact a, adot, b, bdot, g, gdot:
1.416491E-05 2.108918E-02 6.247521E-07 4.698818E-04 2.277558E-02 -6.871428E-05
# Covariance matrix:
2.8293E-13 3.0982E-12 6.7902E-15 3.1955E-14 1.4412E-12 1.3171E-10
3.0982E-12 3.2059E-10 4.3847E-13 2.7936E-12 1.1095E-10 1.1751E-08
6.7902E-15 4.3847E-13 1.3724E-13 -1.7642E-13 1.5817E-13 1.6325E-11
3.1955E-14 2.7936E-12 -1.7642E-13 4.4738E-13 9.7714E-13 1.0287E-10
1.4412E-12 1.1095E-10 1.5817E-13 9.7714E-13 3.9272E-11 4.1028E-09
1.3171E-10 1.1751E-08 1.6325E-11 1.0287E-10 4.1028E-09 4.3243E-07
# lat0 lon0 xBary yBary zBary JD0
1.746937 -174.623058 -0.128240 0.030238 -0.986858 2457480.890761
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 180.43199 +/- 91.848
Argument of Peri: 233.01929 +/- 91.850
Long of Asc Node: 132.12601 +/- 0.041
Inclination: 2.12721 +/- 0.001
Eccentricity: 0.01901945 +/- 0.0009
Semi-Major Axis: 44.05971050 +/- 0.0193
Time of Perihelion: 2510763.3391 +/- 27253.8
Perihelion: 43.22171905 +/- 0.0447
Aphelion: 44.89770196 +/- 0.0451
Period (y) 292.4628 +/- 0.19
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.66782618 +/- 0.0120
Ecliptic Y -4.33533859 +/- 0.0011
Ecliptic Z 1.33854855 +/- 0.0004
Ecliptic XDOT 0.00024760 +/- 0.0001
Ecliptic YDOT -0.00253002 +/- 0.0000
Ecliptic ZDOT 0.00005621 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.89767888 +/- 0.0120
Geocenter to KBO 43.90667280 +/- 0.0121
# Hcoef: 8.13
The following table shows the complete astrometric record for 17BH232. 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 (17BH232) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.389972 12 22 30.67 -00 31 55.8 17BH232 T09 C~81Bn 2016 04 02.515196 12 22 30.14 -00 31 52.3 17BH232 T09 C~81Bn 2016 04 04.36377 12 22 22.42 -00 31 02.8 25.4g 17BH232 T09 C~8COq 2016 04 04.38940 12 22 22.32 -00 31 01.8 25.6g 17BH232 T09 C~8COq 2016 04 04.40648 12 22 22.24 -00 31 01.3 25.5g 17BH232 T09 C~8COq 2016 04 04.41735 12 22 22.18 -00 31 00.9 25.4g 17BH232 T09 C~8COq 2016 06 04.25539 12 19 23.34 -00 13 01.0 24.7z 17BH232 T09 C~8COq 2016 06 04.27037 12 19 23.32 -00 13 01.0 23.9z 17BH232 T09 C~8COq 2016 06 04.28388 12 19 23.32 -00 13 00.8 24.3z 17BH232 T09 C~8COq 2016 06 04.30544 12 19 23.28 -00 13 00.8 24.1z 17BH232 T09 C~8COq 2016 06 04.32166 12 19 23.27 -00 13 00.6 23.9z 17BH232 T09 C~8COq 2016 06 04.33517 12 19 23.25 -00 13 00.6 23.9z 17BH232 T09 C~8COq 2016 06 05.311488 12 19 22.27 -00 12 56.4 17BH232 T09 C~81Bn 2016 06 05.356114 12 19 22.22 -00 12 56.2 17BH232 T09 C~81Bn 2017 01 23.607577 12 30 48.21 -01 25 28.3 17BH232 T09 C~81Bn 2017 01 23.646523 12 30 48.16 -01 25 27.9 17BH232 T09 C~81Bn 2017 01 28.59808 12 30 40.45 -01 24 25.1 24.4z 17BH232 T09 C~7xTo 2017 01 28.61959 12 30 40.41 -01 24 24.8 24.3z 17BH232 T09 C~7xTo 2017 01 28.64259 12 30 40.37 -01 24 24.3 24.5z 17BH232 T09 C~7xTo 2017 01 28.65069 12 30 40.36 -01 24 24.1 24.4z 17BH232 T09 C~7xTo 2017 02 02.609406 12 30 30.76 -01 23 10.1 17BH232 T09 C~81Bn 2017 02 02.644530 12 30 30.68 -01 23 09.5 17BH232 T09 C~81Bn 2017 02 23.52167 12 29 32.19 -01 16 08.1 24.9r 17BH232 T09 C~7xTo 2017 02 23.56346 12 29 32.04 -01 16 07.2 24.9r 17BH232 T09 C~7xTo 2017 02 23.59748 12 29 31.94 -01 16 06.4 25.2r 17BH232 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 0.10 0.00 -0.06
2 0.0003 -8.69 0.11 0.07 0.06
3 0.0054 -134.62 0.07 -0.34 -0.29
4 0.0055 -136.39 0.06 -0.02 0.04
5 0.0055 -137.69 -0.06 -0.03 0.04
6 0.0056 -138.67 -0.29 -0.02 0.05
7 0.1721 -3029.77 -0.10 -70.99 0.03
8 0.1722 -3030.05 -0.11 -71.11 -0.06
9 0.1722 -3030.13 0.05 -70.92 0.16
10 0.1723 -3030.68 -0.12 -71.16 -0.03
11 0.1723 -3030.89 -0.05 -71.04 0.13
12 0.1723 -3031.17 -0.09 -71.16 0.05
13 0.1750 -3046.33 0.24 -73.12 -0.03
14 0.1751 -3047.10 0.20 -73.24 -0.04
15 0.8110 8128.28 0.03 3.31 -0.12
16 0.8111 8127.43 0.13 3.38 -0.12
17 0.8247 7996.21 -0.08 15.35 -0.04
18 0.8247 7995.54 -0.09 15.38 -0.05
19 0.8248 7994.79 -0.14 15.61 0.13
20 0.8248 7994.57 -0.10 15.73 0.24
21 0.8384 7832.85 0.18 26.77 -0.06
22 0.8385 7831.50 0.13 26.85 -0.05
23 0.8956 6858.00 -0.09 66.95 0.05
24 0.8958 6855.58 -0.11 66.89 -0.06
25 0.8958 6853.88 0.14 67.03 0.04
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.
17BH232 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.618 44.080 43.569 ecceobj 0.030 0.085 0.038 incobj 2.132 2.133 2.131 qmin 41.642 39.387 41.336 qmax 46.227 49.455 46.414 amean 43.827 44.279 43.784 amin 43.489 43.919 43.453 amax 44.174 44.659 44.129 emean 0.031 0.091 0.036 emin 0.014 0.075 0.020 emax 0.046 0.108 0.053 imean 1.633 1.631 1.679 imin 0.902 0.857 0.901 imax 2.272 2.308 2.347 excite_mean 0.042 0.096 0.047 fracstop 1.000 1.000 1.000 cjmean 3.097 3.094 3.096 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 184.5 187.8 179.3 kozaiamp 179.9 180.0 180.0