Orbit Fit and Astrometric record for 17BH232

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 Thu Apr  3 01:11:04 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