Orbit Fit and Astrometric record for 16GV390

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: 16GV390   
# Created Tue Apr  1 01:10:47 2025
# Orbit generated from Bernstein formalism
# Fitting     29 observations of     29
# Arc:   1.86y
# First observation: 2015/03/18
#  Last observation: 2017/01/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000043   0.024666   0.000001   0.000445   0.024164   0.000000
# Chi-squared of fit:    15.18 DOF:     52 RMS:  0.13
# Min/Max residuals:    -0.37    0.32
# Exact a, adot, b, bdot, g, gdot:
  1.567967E-05  2.481222E-02  1.300401E-07  4.492370E-04  2.472280E-02  8.138782E-04
# Covariance matrix:
  2.5731E-13  7.5627E-13 -2.6773E-15  2.0709E-14  1.8502E-12  2.5095E-11
  7.5627E-13  6.0385E-12 -1.7559E-14  1.3893E-13  1.1691E-11  1.7166E-10
 -2.6773E-15 -1.7559E-14  1.0505E-13 -7.5610E-14 -3.5880E-14 -5.1427E-13
  2.0709E-14  1.3893E-13 -7.5610E-14  1.0779E-13  2.8108E-13  4.0552E-12
  1.8502E-12  1.1691E-11 -3.5880E-14  2.8108E-13  2.4290E-11  3.4438E-10
  2.5095E-11  1.7166E-10 -5.1427E-13  4.0552E-12  3.4438E-10  4.9960E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.867631 -177.724542    0.084667    0.015094   -0.988425  2457100.006298
# Heliocentric elements and errors
Epoch:              2457100.5000  =  2015/03/19
Mean Anomaly:           24.95143 +/-     1.942
Argument of Peri:       10.53940 +/-     2.289
Long of Asc Node:      142.95693 +/-     0.021
Inclination:             1.33978 +/-     0.001
Eccentricity:         0.07085251 +/-    0.0011
Semi-Major Axis:     44.23835769 +/-    0.0196
Time of Perihelion: 2449651.6393 +/-     579.6
Perihelion:          41.10395882 +/-    0.0516
Aphelion:            47.37275656 +/-    0.0527
Period (y)              294.2434 +/-      0.20
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -41.40618799 +/-    0.0081
Ecliptic Y           -1.56062241 +/-    0.0003
Ecliptic Z            0.61251349 +/-    0.0001
Ecliptic XDOT         0.00001638 +/-    0.0000
Ecliptic YDOT        -0.00275491 +/-    0.0000
Ecliptic ZDOT         0.00005120 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.44011485 +/-    0.0081
Geocenter to KBO     40.44849424 +/-    0.0081
# Hcoef:  8.90

The following table shows the complete astrometric record for 16GV390. 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 (16GV390) followed by the observatory code and reference code for the source of the astrometry.

2015 03  18.50552  12 09 43.86   -00 06 31.6   24.9r 16GV390   T09  C~8ieE      
2015 03  18.57964  12 09 43.52   -00 06 29.4   25.1r 16GV390   T09  C~8ieE      
2015 03  20.41605  12 09 35.26   -00 05 35.0   24.4i 16GV390   T09  C~8ieE      
2015 03  20.45800  12 09 35.06   -00 05 33.6   24.6i 16GV390   T09  C~8ieE      
2015 03  20.46072  12 09 35.06   -00 05 33.5   24.6i 16GV390   T09  C~8ieE      
2015 03  20.49692  12 09 34.88   -00 05 32.8   24.7i 16GV390   T09  C~8ieE      
2015 03  20.53554  12 09 34.71   -00 05 31.4   24.4i 16GV390   T09  C~8ieE      
2015 03  25.48280  12 09 12.37   -00 03 04.6   25.8g 16GV390   T09  C~8ieE      
2015 03  25.51107  12 09 12.23   -00 03 03.8   25.9g 16GV390   T09  C~8ieE      
2015 03  25.55615  12 09 12.01   -00 03 02.3   26.0g 16GV390   T09  C~8ieE      
2015 03  29.27727  12 08 55.29   -00 01 12.8   23.6y 16GV390   T09  C~8ieE      
2015 03  29.29365  12 08 55.20   -00 01 12.3   23.6y 16GV390   T09  C~8ieE      
2015 03  29.36170  12 08 54.88   -00 01 10.6   24.2y 16GV390   T09  C~8ieE      
2016 04  02.38656  12 13 49.63   -00 31 23.7   25.4i 16GV390   T09  C~8HFs      
2016 04  02.40651  12 13 49.56   -00 31 23.2   24.5i 16GV390   T09  C~8HFs      
2016 04  02.43106  12 13 49.43   -00 31 22.5   24.7i 16GV390   T09  C~8HFs      
2016 04  02.48823  12 13 49.18   -00 31 21.0   25.1i 16GV390   T09  C~8HFs      
2016 04  02.51252  12 13 49.07   -00 31 20.0   24.9i 16GV390   T09  C~8HFs      
2016 04  04.34312  12 13 40.97   -00 30 27.9   26.0g 16GV390   T09  C~8HFs      
2016 04  04.35952  12 13 40.90   -00 30 27.0   25.7g 16GV390   T09  C~8HFs      
2016 04  04.40435  12 13 40.70   -00 30 25.5   25.9g 16GV390   T09  C~8HFs      
2016 04  08.50449  12 13 22.78   -00 28 29.9   25.6r 16GV390   T09  C~8HFs      
2016 04  08.50945  12 13 22.73   -00 28 29.6   25.4r 16GV390   T09  C~8HFs      
2016 04  08.51792  12 13 22.70   -00 28 29.3   25.6r 16GV390   T09  C~8HFs      
2017 01  26.62279  12 23 08.81   -01 31 07.0   24.3z 16GV390   T09  C~8ieE      
2017 01  26.62885  12 23 08.81   -01 31 07.0   25.1z 16GV390   T09  C~8ieE      
2017 01  26.63960  12 23 08.79   -01 31 07.0   24.5z 16GV390   T09  C~8ieE      
2017 01  26.64498  12 23 08.78   -01 31 06.8   24.5z 16GV390   T09  C~8ieE      
2017 01  26.65034  12 23 08.76   -01 31 06.6   24.8z 16GV390   T09  C~8ieE      

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     0.04       0.00     0.03
     2   0.0002     -5.55     0.02      -0.01     0.03
     3   0.0052   -140.87     0.06       0.66    -0.04
     4   0.0053   -144.18    -0.10       0.76     0.06
     5   0.0054   -144.22     0.06       0.85     0.16
     6   0.0055   -146.97     0.02       0.42    -0.27
     7   0.0056   -149.87     0.02       0.69     0.01
     8   0.0191   -515.71     0.12       2.20     0.12
     9   0.0192   -517.96    -0.01       2.10     0.03
    10   0.0193   -521.58    -0.26       2.17     0.10
    11   0.0295   -795.25     0.16       2.96     0.10
    12   0.0295   -796.68    -0.06       2.88     0.03
    13   0.0297   -801.76    -0.07       2.54    -0.30
    14   1.0428   3976.34    -0.18      95.93     0.06
    15   1.0429   3975.17     0.13      95.97     0.11
    16   1.0429   3973.11    -0.13      95.84    -0.01
    17   1.0431   3969.07     0.06      95.72    -0.10
    18   1.0431   3967.16    -0.07      95.99     0.17
    19   1.0482   3834.91     0.12      95.52    -0.37
    20   1.0482   3833.59     0.00      95.92     0.05
    21   1.0483   3830.24    -0.06      96.11     0.26
    22   1.0595   3537.56     0.32      95.37    -0.12
    23   1.0596   3536.75    -0.14      95.35    -0.14
    24   1.0596   3536.22    -0.06      95.45    -0.04
    25   1.8621  13113.10    -0.14     137.51     0.04
    26   1.8621  13113.10     0.06     137.51     0.03
    27   1.8621  13112.83     0.12     137.39    -0.10
    28   1.8621  13112.61     0.07     137.52     0.02
    29   1.8621  13112.25    -0.11     137.58     0.08

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.

16GV390    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.825    43.872    43.782
ecceobj         0.063     0.060     0.066
incobj          1.344     1.344     1.344
qmin           40.210    40.406    39.993
qmax           48.070    47.946    48.226
amean          44.020    44.070    43.975
amin           43.672    43.715    43.628
amax           44.388    44.439    44.345
emean           0.067     0.064     0.071
emin            0.050     0.048     0.054
emax            0.083     0.079     0.088
imean           1.475     1.466     1.488
imin            0.656     0.694     0.619
imax            2.185     2.151     2.218
excite_mean     0.072     0.069     0.076
fracstop        1.000     1.000     1.000
cjmean          3.095     3.097     3.094

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       181.0     180.3     181.8
kozaiamp        179.9     180.0     180.0