Orbit Fit and Astrometric record for 17GU36

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: 17GU36    
# Created Tue Apr  1 01:11:07 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     16 observations of     16
# Arc:   5.09y
# First observation: 2014/02/27
#  Last observation: 2019/04/03
# Chi-squared of fit:     6.87 DOF:     26 RMS:  0.12
# Min/Max residuals:    -0.21    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.604017E-05  2.375057E-02  2.305096E-06  1.711618E-03  2.418297E-02  1.743110E-03
# Covariance matrix:
  3.6355E-13 -2.0793E-13  5.4098E-15 -9.8937E-15 -6.2823E-14 -1.2156E-12
 -2.0793E-13  2.9071E-13 -1.0857E-14  1.9919E-14  1.5358E-13  2.4513E-12
  5.4098E-15 -1.0857E-14  3.0130E-13 -8.1312E-14  4.9688E-16 -1.0911E-13
 -9.8937E-15  1.9919E-14 -8.1312E-14  3.2606E-14  1.8404E-15  1.9753E-13
 -6.2823E-14  1.5358E-13  4.9688E-16  1.8404E-15  1.1901E-12  3.9555E-13
 -1.2156E-12  2.4513E-12 -1.0911E-13  1.9753E-13  3.9555E-13  2.4147E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    4.530420 -176.080714    0.419558    0.070784   -0.892198  2456716.099916
# Heliocentric elements and errors
Epoch:              2456716.5000  =  2014/02/28
Mean Anomaly:           51.32374 +/-     0.076
Argument of Peri:      348.04932 +/-     0.096
Long of Asc Node:      136.59374 +/-     0.003
Inclination:             6.07704 +/-     0.000
Eccentricity:         0.07932846 +/-    0.0002
Semi-Major Axis:     44.25835002 +/-    0.0086
Time of Perihelion: 2441384.2106 +/-      23.2
Perihelion:          40.74740342 +/-    0.0124
Aphelion:            47.76929662 +/-    0.0133
Period (y)              294.4429 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -42.04866685 +/-    0.0019
Ecliptic Y           -2.45871775 +/-    0.0001
Ecliptic Z            3.26638748 +/-    0.0001
Ecliptic XDOT        -0.00000297 +/-    0.0000
Ecliptic YDOT        -0.00269797 +/-    0.0000
Ecliptic ZDOT         0.00020889 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.24691020 +/-    0.0018
Geocenter to KBO     41.35139314 +/-    0.0019
# Hcoef:  9.05

The following table shows the complete astrometric record for 17GU36. 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 (17GU36) followed by the observatory code and reference code for the source of the astrometry.

2014 02  27.599138 12 21 34.94   +02 36 00.8         17GU36    T09  C~86vM      
2014 02  27.604633 12 21 34.93   +02 36 01.0         17GU36    T09  C~86vM      
2014 02  27.621003 12 21 34.87   +02 36 01.7         17GU36    T09  C~86vM      
2014 02  27.632392 12 21 34.83   +02 36 02.1         17GU36    T09  C~86vM      
2016 04  04.489312 12 29 18.81   +01 59 49.0         17GU36    T09  C~86vM      
2017 01  30.640269 12 38 16.83   +01 03 36.9         17GU36    T09  C~86vM      
2017 02  23.55566  12 37 13.07   +01 13 02.6   25.5r 17GU36    T09  C~86vM      
2017 02  23.58678  12 37 12.95   +01 13 03.6   25.4r 17GU36    T09  C~86vM      
2017 02  23.58888  12 37 12.93   +01 13 03.7   25.5r 17GU36    T09  C~86vM      
2017 02  23.62075  12 37 12.82   +01 13 04.4   25.0r 17GU36    T09  C~86vM      
2017 04  02.38545  12 34 37.52   +01 31 34.4   25.2r 17GU36    T09  C~86vM      
2017 04  02.45608  12 34 37.19   +01 31 36.6   25.0r 17GU36    T09  C~86vM      
2017 04  02.48785  12 34 37.05   +01 31 37.4   25.0r 17GU36    T09  C~86vM      
2019 04  03.426512 12 44 48.31   +00 37 47.1         17GU36    T09  C~86vM      
2019 04  03.46156  12 44 48.13   +00 37 47.9   25.1i 17GU36    T09  C~8COx      
2019 04  03.482982 12 44 48.05   +00 37 48.7         17GU36    T09  C~86vM      

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    -0.19       0.00    -0.18
     2   0.0000      0.00    -0.02       0.00    -0.14
     3   0.0001      0.00     0.04       0.00     0.08
     4   0.0001      0.00     0.11       0.00     0.15
     5   2.0996      0.00     0.10       0.00     0.02
     6   2.9241      0.00     0.11       0.00     0.09
     7   2.9896      0.00     0.20       0.00    -0.03
     8   2.9897      0.00     0.04       0.00     0.11
     9   2.9897      0.00    -0.15       0.00     0.15
    10   2.9898      0.00    -0.12       0.00    -0.02
    11   3.0932      0.00     0.06       0.00    -0.09
    12   3.0934      0.00    -0.13       0.00     0.08
    13   3.0935      0.00    -0.09       0.00    -0.03
    14   5.0947      0.00     0.13       0.00     0.03
    15   5.0948      0.00    -0.21       0.00    -0.18
    16   5.0948      0.00     0.04       0.00     0.01

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.

17GU36    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.948    43.948    43.948
ecceobj         0.075     0.075     0.075
incobj          6.090     6.090     6.090
qmin           39.799    39.798    39.805
qmax           48.763    48.779    48.727
amean          44.150    44.150    44.150
amin           43.789    43.794    43.789
amax           44.528    44.529    44.532
emean           0.080     0.080     0.080
emin            0.066     0.066     0.066
emax            0.096     0.096     0.095
imean           5.082     5.082     5.082
imin            4.471     4.471     4.471
imax            5.781     5.780     5.781
excite_mean     0.119     0.119     0.119
fracstop        1.000     1.000     1.000
cjmean          3.086     3.086     3.086

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       181.2     181.0     181.1
kozaiamp        180.0     179.9     180.0