Orbit Fit and Astrometric record for 17BH233

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 Tue Apr  1 01:11:01 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