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: 17BH233
# Created Sun Apr 27 01:11:02 2025
# Orbit generated from Bernstein formalism
# Fitting 16 observations of 16
# Arc: 0.90y
# First observation: 2016/04/02
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000093 0.021754 -0.000001 -0.000968 0.022515 0.000000
# Chi-squared of fit: 5.39 DOF: 26 RMS: 0.10
# Min/Max residuals: -0.26 0.20
# Exact a, adot, b, bdot, g, gdot:
1.472512E-05 2.152338E-02 -6.810791E-07 -9.696361E-04 2.295049E-02 -1.469300E-03
# Covariance matrix:
7.3416E-13 4.8957E-12 4.4441E-14 -2.7341E-13 2.6739E-12 2.2495E-10
4.8957E-12 3.1416E-10 1.9517E-12 -1.4268E-11 1.1762E-10 1.1661E-08
4.4441E-14 1.9517E-12 4.6596E-13 -6.4021E-13 7.6821E-13 7.3895E-11
-2.7341E-13 -1.4268E-11 -6.4021E-13 1.4929E-12 -5.4420E-12 -5.3405E-10
2.6739E-12 1.1762E-10 7.6821E-13 -5.4420E-12 4.6280E-11 4.4526E-09
2.2495E-10 1.1661E-08 7.3895E-11 -5.3405E-10 4.4526E-09 4.3664E-07
# lat0 lon0 xBary yBary zBary JD0
3.309381 -174.763695 -0.130901 0.057114 -0.985322 2457480.904541
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 277.93721 +/- 2.344
Argument of Peri: 218.08150 +/- 0.813
Long of Asc Node: 56.73029 +/- 0.034
Inclination: 4.14207 +/- 0.002
Eccentricity: 0.06478943 +/- 0.0306
Semi-Major Axis: 44.77585915 +/- 0.1659
Time of Perihelion: 2482426.9130 +/- 698.8
Perihelion: 41.87485674 +/- 1.3792
Aphelion: 47.67686156 +/- 1.3817
Period (y) 299.6223 +/- 1.67
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.29247812 +/- 0.0128
Ecliptic Y -4.19302564 +/- 0.0012
Ecliptic Z 2.51529956 +/- 0.0007
Ecliptic XDOT 0.00040204 +/- 0.0001
Ecliptic YDOT -0.00254851 +/- 0.0000
Ecliptic ZDOT -0.00012559 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.56155085 +/- 0.0128
Geocenter to KBO 43.57204875 +/- 0.0129
# Hcoef: 8.52
The following table shows the complete astrometric record for 17BH233. 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 (17BH233) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.403752 12 24 28.24 +00 57 29.3 17BH233 T09 C~83Eq 2016 04 02.523267 12 24 27.72 +00 57 32.4 17BH233 T09 C~83Eq 2016 06 05.320050 12 21 15.92 +01 14 28.6 17BH233 T09 C~83Eq 2016 06 05.345518 12 21 15.88 +01 14 28.7 17BH233 T09 C~83Eq 2017 01 23.63041 12 32 45.06 -00 01 36.5 25.1i 17BH233 T09 C~7zpa 2017 01 23.63574 12 32 45.05 -00 01 36.1 24.4i 17BH233 T09 C~7zpa 2017 01 23.65191 12 32 45.03 -00 01 35.9 24.9i 17BH233 T09 C~7zpa 2017 01 28.59538 12 32 37.41 -00 00 28.6 24.8z 17BH233 T09 C~7zpa 2017 01 28.60076 12 32 37.41 -00 00 28.3 24.8z 17BH233 T09 C~7zpa 2017 01 28.60612 12 32 37.40 -00 00 28.1 24.7z 17BH233 T09 C~7zpa 2017 01 28.62228 12 32 37.38 -00 00 27.9 24.9z 17BH233 T09 C~7zpa 2017 01 28.64799 12 32 37.33 -00 00 27.6 24.7z 17BH233 T09 C~7zpa 2017 02 23.53583 12 31 29.11 +00 08 09.0 25.3r 17BH233 T09 C~7zpa 2017 02 23.57406 12 31 28.96 +00 08 09.8 24.9r 17BH233 T09 C~7zpa 2017 02 23.60801 12 31 28.85 +00 08 10.7 25.1r 17BH233 T09 C~7zpa 2017 02 23.64828 12 31 28.70 +00 08 11.5 25.1r 17BH233 T09 C~7zpa
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 0.02 0.00 0.00
2 0.0003 -8.39 -0.03 -0.24 -0.06
3 0.1750 -3052.33 0.10 -206.39 0.02
4 0.1751 -3052.92 -0.09 -206.54 0.01
5 0.8110 8251.43 0.14 -301.93 -0.10
6 0.8110 8251.13 -0.03 -301.62 0.19
7 0.8111 8250.77 0.01 -301.56 0.20
8 0.8246 8118.95 -0.08 -285.07 -0.26
9 0.8246 8118.83 -0.04 -284.79 -0.00
10 0.8246 8118.61 -0.09 -284.67 0.10
11 0.8247 8118.26 0.06 -284.60 0.12
12 0.8248 8117.45 0.04 -284.63 0.03
13 0.8956 6971.66 0.10 -215.96 0.09
14 0.8957 6969.28 -0.08 -216.12 -0.12
15 0.8958 6967.40 0.01 -215.95 -0.00
16 0.8959 6965.02 -0.05 -216.11 -0.22
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.
17BH233 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.302 44.916 44.190 ecceobj 0.064 0.146 0.025 incobj 4.150 4.154 4.148 qmin 41.106 38.014 42.710 qmax 48.208 52.710 46.278 amean 44.531 45.154 44.411 amin 44.185 44.774 44.080 amax 44.899 45.587 44.764 emean 0.058 0.137 0.021 emin 0.043 0.120 0.006 emax 0.074 0.156 0.035 imean 2.824 2.528 2.871 imin 2.241 1.633 2.324 imax 3.390 3.396 3.387 excite_mean 0.077 0.144 0.055 fracstop 1.000 1.000 1.000 cjmean 3.101 3.090 3.103 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 183.3 186.2 180.7 kozaiamp 179.9 180.0 180.0