Orbit Fit and Astrometric record for 17BD232

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: 17BD232   
# Created Fri Nov  1 01:10:29 2024
# Orbit generated from Bernstein formalism
# Fitting     26 observations of     26
# Arc:   3.00y
# First observation: 2016/04/02
#  Last observation: 2019/04/03
Preliminary a, adot, b, bdot, g, gdot:
  -0.000069   0.023554   0.000002  -0.000579   0.023480   0.000000
# Chi-squared of fit:    30.40 DOF:     46 RMS:  0.19
# Min/Max residuals:    -0.55    0.48
# Exact a, adot, b, bdot, g, gdot:
  1.516769E-05  2.345070E-02  6.188354E-08 -5.784557E-04  2.387030E-02 -8.039707E-04
# Covariance matrix:
  2.2695E-13 -7.2057E-13 -1.5472E-15  1.3610E-14  8.3188E-14 -9.1115E-12
 -7.2057E-13  3.3687E-12  8.2172E-15 -6.8646E-14 -3.8522E-13  4.5914E-11
 -1.5472E-15  8.2172E-15  9.8488E-14 -7.8242E-14  8.7921E-16  1.3171E-13
  1.3610E-14 -6.8646E-14 -7.8242E-14  1.4981E-13  6.4768E-15 -9.9228E-13
  8.3188E-14 -3.8522E-13  8.7921E-16  6.4768E-15  1.7378E-13 -4.4946E-12
 -9.1115E-12  4.5914E-11  1.3171E-13 -9.9228E-13 -4.4946E-12  6.6242E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.921543 -175.106562   -0.136567    0.033208   -0.985644  2457480.890761
# Heliocentric elements and errors
Epoch:              2457480.5000  =  2016/04/02
Mean Anomaly:          332.91688 +/-     0.841
Argument of Peri:      157.68426 +/-     0.974
Long of Asc Node:       58.02131 +/-     0.018
Inclination:             2.35183 +/-     0.001
Eccentricity:         0.06360404 +/-    0.0004
Semi-Major Axis:     45.41308057 +/-    0.0068
Time of Perihelion: 2465889.9190 +/-     261.2
Perihelion:          42.52462511 +/-    0.0210
Aphelion:            48.30153603 +/-    0.0213
Period (y)              306.0410 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -42.69156276 +/-    0.0007
Ecliptic Y           -3.79445992 +/-    0.0001
Ecliptic Z            1.40473994 +/-    0.0000
Ecliptic XDOT         0.00031916 +/-    0.0000
Ecliptic YDOT        -0.00267923 +/-    0.0000
Ecliptic ZDOT        -0.00006939 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.88287247 +/-    0.0007
Geocenter to KBO     41.89305612 +/-    0.0007
# Hcoef:  8.97

The following table shows the complete astrometric record for 17BD232. 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 (17BD232) followed by the observatory code and reference code for the source of the astrometry.

2016 04  02.389972 12 21 00.78   -00 10 49.4         17BD232   T09  C~81Bn      
2016 04  02.41732  12 21 00.65   -00 10 48.4   25.0i 17BD232   T09  C~8COq      
2016 04  02.44189  12 21 00.57   -00 10 48.1   24.7i 17BD232   T09  C~8COq      
2016 04  02.466322 12 21 00.44   -00 10 47.3         17BD232   T09  C~81Bn      
2016 04  02.50172  12 21 00.26   -00 10 45.6   25.2i 17BD232   T09  C~8COq      
2016 04  02.515196 12 21 00.23   -00 10 45.9         17BD232   T09  C~81Bn      
2016 06  04.25196  12 17 47.82   +00 07 47.1   24.3z 17BD232   T09  C~8COq      
2016 06  04.27037  12 17 47.79   +00 07 47.1   24.9z 17BD232   T09  C~8COq      
2016 06  04.28656  12 17 47.77   +00 07 47.5   24.6z 17BD232   T09  C~8COq      
2016 06  04.28926  12 17 47.78   +00 07 47.8   25.3z 17BD232   T09  C~8COq      
2016 06  04.30544  12 17 47.72   +00 07 47.6   25.2z 17BD232   T09  C~8COq      
2016 06  04.32707  12 17 47.70   +00 07 47.5   24.3z 17BD232   T09  C~8COq      
2016 06  05.311488 12 17 46.73   +00 07 50.8         17BD232   T09  C~81Bn      
2016 06  05.339160 12 17 46.71   +00 07 50.8         17BD232   T09  C~81Bn      
2017 01  23.60759  12 29 52.30   -01 11 25.1   24.9i 17BD232   T09  C~7xTo      
2017 01  23.61026  12 29 52.28   -01 11 24.9   25.2i 17BD232   T09  C~7xTo      
2017 01  23.64653  12 29 52.23   -01 11 24.4   25.5i 17BD232   T09  C~7xTo      
2017 01  28.59194  12 29 44.24   -01 10 21.5   24.9z 17BD232   T09  C~7xTo      
2017 01  28.59808  12 29 44.21   -01 10 21.7   25.3z 17BD232   T09  C~7xTo      
2017 01  28.61959  12 29 44.19   -01 10 21.1   24.9z 17BD232   T09  C~7xTo      
2017 01  28.65069  12 29 44.12   -01 10 21.0   25.1z 17BD232   T09  C~7xTo      
2017 02  02.636127 12 29 34.05   -01 09 05.4         17BD232   T09  C~81Bn      
2017 02  23.52167  12 28 33.04   -01 01 56.2   26.2r 17BD232   T09  C~7xTo      
2017 02  23.59538  12 28 32.74   -01 01 54.4   26.1r 17BD232   T09  C~7xTo      
2017 02  23.59748  12 28 32.75   -01 01 54.6   26.2r 17BD232   T09  C~7xTo      
2019 04  03.440043 12 35 42.46   -01 52 21.0         17BD232   T09  C~81Bn      

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     0.08       0.00    -0.09
     2   0.0001     -2.19    -0.14       0.15     0.09
     3   0.0001     -3.41     0.40      -0.05    -0.09
     4   0.0002     -5.51     0.05      -0.09    -0.10
     5   0.0003     -8.67    -0.55       0.40     0.43
     6   0.0003     -8.96     0.12      -0.06    -0.00
     7   0.1721  -3100.10     0.26    -122.10    -0.05
     8   0.1722  -3100.52     0.16    -122.28    -0.17
     9   0.1722  -3100.95     0.00    -122.03     0.14
    10   0.1722  -3100.93     0.07    -121.70     0.48
    11   0.1723  -3101.68    -0.40    -122.24    -0.01
    12   0.1723  -3101.92    -0.27    -122.45    -0.15
    13   0.1750  -3116.59     0.04    -125.19    -0.08
    14   0.1751  -3116.86     0.20    -125.31    -0.11
    15   0.8110   8765.45     0.14    -180.02    -0.13
    16   0.8110   8765.10    -0.14    -179.95    -0.07
    17   0.8111   8764.21    -0.12    -179.79     0.04
    18   0.8246   8629.03     0.06    -169.46     0.16
    19   0.8247   8628.70    -0.08    -169.82    -0.21
    20   0.8247   8628.18     0.09    -169.39     0.19
    21   0.8248   8627.18     0.07    -169.71    -0.19
    22   0.8385   8458.28     0.15    -160.07    -0.17
    23   0.8956   7446.63     0.13    -128.22     0.15
    24   0.8958   7441.78    -0.32    -128.35    -0.03
    25   0.8958   7442.00     0.02    -128.47    -0.15
    26   3.0008  14578.12     0.00    -358.91     0.11

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.

17BD232    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.913    44.953    44.874
ecceobj         0.054     0.053     0.055
incobj          2.355     2.355     2.355
qmin           41.930    42.006    41.799
qmax           48.604    48.595    48.645
amean          45.145    45.188    45.109
amin           44.792    44.824    44.745
amax           45.514    45.551    45.485
emean           0.054     0.053     0.055
emin            0.040     0.040     0.042
emax            0.068     0.067     0.069
imean           1.398     1.402     1.392
imin            0.901     0.909     0.887
imax            1.829     1.830     1.828
excite_mean     0.059     0.059     0.061
fracstop        1.000     1.000     1.000
cjmean          3.111     3.112     3.111

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       198.9     201.0     194.3
kozaiamp        180.0     180.0     180.0