Orbit Fit and Astrometric record for 17BG232

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: 17BG232   
# Created Tue Apr  1 01:11:01 2025
# Orbit generated from Bernstein formalism
# Fitting     22 observations of     22
# Arc:   0.90y
# First observation: 2016/04/02
#  Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000044   0.022631   0.000002  -0.001861   0.023363   0.000000
# Chi-squared of fit:     8.43 DOF:     38 RMS:  0.11
# Min/Max residuals:    -0.27    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.452005E-05  2.255691E-02 -5.854912E-07 -1.869719E-03  2.370964E-02 -1.631346E-03
# Covariance matrix:
  3.2821E-13  3.0863E-12  2.7820E-14 -2.4521E-13  1.4975E-12  1.2714E-10
  3.0863E-12  3.2921E-10  2.2757E-12 -2.2067E-11  1.1364E-10  1.1411E-08
  2.7820E-14  2.2757E-12  1.8688E-13 -3.7325E-13  8.0080E-13  7.9485E-11
 -2.4521E-13 -2.2067E-11 -3.7325E-13  1.9530E-12 -7.6951E-12 -7.6831E-10
  1.4975E-12  1.1364E-10  8.0080E-13 -7.6951E-12  4.0299E-11  3.9800E-09
  1.2714E-10  1.1411E-08  7.9485E-11 -7.6831E-10  3.9800E-09  3.9732E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.057049 -174.863383   -0.132380    0.035560   -0.986133  2457480.890761
# Heliocentric elements and errors
Epoch:              2457480.5000  =  2016/04/02
Mean Anomaly:          279.75024 +/-     1.529
Argument of Peri:      245.06240 +/-     1.315
Long of Asc Node:       28.26537 +/-     0.010
Inclination:             5.14267 +/-     0.002
Eccentricity:         0.06868668 +/-    0.0278
Semi-Major Axis:     43.47087663 +/-    0.1510
Time of Perihelion: 2480817.0829 +/-     427.6
Perihelion:          40.48500629 +/-    1.2169
Aphelion:            46.45674696 +/-    1.2194
Period (y)              286.6195 +/-      1.49
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -42.95516696 +/-    0.0112
Ecliptic Y           -3.99655370 +/-    0.0010
Ecliptic Z            1.51392127 +/-    0.0004
Ecliptic XDOT         0.00041309 +/-    0.0001
Ecliptic YDOT        -0.00258510 +/-    0.0000
Ecliptic ZDOT        -0.00022252 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.16724184 +/-    0.0112
Geocenter to KBO     42.17694216 +/-    0.0113
# Hcoef:  8.57

The following table shows the complete astrometric record for 17BG232. 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 (17BG232) followed by the observatory code and reference code for the source of the astrometry.

2016 04  02.389972 12 22 07.22   -00 09 08.2         17BG232   T09  C~83Eq      
2016 04  02.501705 12 22 06.72   -00 09 05.1         17BG232   T09  C~83Eq      
2016 04  04.34598  12 21 58.69   -00 08 15.9   25.5g 17BG232   T09  C~89UT      
2016 04  04.36800  12 21 58.60   -00 08 15.1   26.2g 17BG232   T09  C~89UT      
2016 04  04.38940  12 21 58.49   -00 08 14.7   26.0g 17BG232   T09  C~89UT      
2016 06  04.25539  12 18 51.74   +00 08 48.5   24.6z 17BG232   T09  C~8COq      
2016 06  04.28926  12 18 51.70   +00 08 48.8   24.1z 17BG232   T09  C~8COq      
2016 06  04.32707  12 18 51.65   +00 08 48.6   24.7z 17BG232   T09  C~8COq      
2016 06  04.34327  12 18 51.63   +00 08 48.8   25.0z 17BG232   T09  C~8COq      
2016 06  05.311488 12 18 50.61   +00 08 51.5         17BG232   T09  C~83Eq      
2016 06  05.356114 12 18 50.55   +00 08 51.6         17BG232   T09  C~83Eq      
2017 01  23.646517 12 30 41.56   -01 11 50.4         17BG232   T09  C~83Eq      
2017 01  28.59194  12 30 33.47   -01 10 50.4   24.3z 17BG232   T09  C~7xTo      
2017 01  28.61959  12 30 33.41   -01 10 50.3   24.1z 17BG232   T09  C~7xTo      
2017 01  28.64259  12 30 33.36   -01 10 49.7   24.5z 17BG232   T09  C~7xTo      
2017 01  28.64799  12 30 33.36   -01 10 49.6   24.6z 17BG232   T09  C~7xTo      
2017 01  28.65069  12 30 33.36   -01 10 49.6   24.1z 17BG232   T09  C~7xTo      
2017 02  02.609406 12 30 23.28   -01 09 37.6         17BG232   T09  C~83Eq      
2017 02  02.636127 12 30 23.22   -01 09 37.2         17BG232   T09  C~83Eq      
2017 02  23.52167  12 29 21.94   -01 02 41.8   25.3r 17BG232   T09  C~7xTo      
2017 02  23.56346  12 29 21.80   -01 02 40.8   25.3r 17BG232   T09  C~7xTo      
2017 02  23.63774  12 29 21.50   -01 02 39.0   25.4r 17BG232   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     0.11       0.00    -0.14
     2   0.0003     -8.11     0.03      -0.13    -0.05
     3   0.0054   -138.20    -0.02      -2.67     0.04
     4   0.0054   -139.76    -0.00      -2.47     0.29
     5   0.0055   -141.43    -0.15      -2.76     0.04
     6   0.1721  -3119.07     0.02    -173.12    -0.02
     7   0.1722  -3119.74    -0.05    -173.08     0.16
     8   0.1723  -3120.35     0.00    -173.56    -0.17
     9   0.1724  -3120.70    -0.07    -173.50    -0.04
    10   0.1750  -3135.82     0.14    -177.08    -0.04
    11   0.1751  -3136.69    -0.01    -177.34    -0.12
    12   0.8111   8578.60     0.14    -399.66     0.02
    13   0.8246   8443.21    -0.02    -392.56     0.06
    14   0.8247   8442.34    -0.01    -392.83    -0.23
    15   0.8248   8441.41    -0.21    -392.57     0.00
    16   0.8248   8441.37    -0.08    -392.48     0.09
    17   0.8248   8441.37     0.01    -392.48     0.09
    18   0.8384   8273.78     0.12    -386.18    -0.00
    19   0.8385   8272.79     0.15    -386.17    -0.01
    20   0.8956   7262.96     0.00    -368.44    -0.01
    21   0.8958   7260.63     0.16    -368.35     0.08
    22   0.8960   7255.78    -0.27    -368.48    -0.05

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.

17BG232    quality flag:2

Type:      CLASSICAL  SCATNEAR CLASSICAL

axisobj        43.020    43.524    42.926
ecceobj         0.068     0.142     0.028
incobj          5.166     5.171     5.164
qmin           39.756    36.997    41.320
qmax           46.940    51.041    45.099
amean          43.240    43.756    43.135
amin           42.903    43.285    42.808
amax           43.569    44.227    43.474
emean           0.059     0.113     0.021
emin            0.041     0.077     0.002
emax            0.078     0.154     0.038
imean           4.259     3.770     4.326
imin            3.400     2.750     3.521
imax            5.191     5.157     5.152
excite_mean     0.095     0.132     0.078
fracstop        1.000     1.000     1.000
cjmean          3.082     3.077     3.084

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       181.5     181.7     179.5
kozaiamp        180.0     180.0     180.0