Orbit Fit and Astrometric record for 16FX58

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: 16FX58    
# Created Tue Nov 30 02:13:51 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     23 observations of     23
# Arc:   6.95y
# First observation: 2013/03/17
#  Last observation: 2020/02/26
# Chi-squared of fit:    31.79 DOF:     40 RMS:  0.21
# Min/Max residuals:    -0.45    0.58
# Exact a, adot, b, bdot, g, gdot:
  1.129032E-05  1.173432E-02 -4.186412E-06 -4.594885E-03  1.697601E-02 -3.519362E-03
# Covariance matrix:
  4.4877E-13 -2.1203E-13 -7.1557E-14  6.1074E-14 -2.3930E-13 -1.7633E-12
 -2.1203E-13  2.1119E-13  9.2978E-14 -8.0401E-14  5.1323E-13  2.3000E-12
 -7.1557E-14  9.2978E-14  3.3429E-13 -9.5544E-14  2.5127E-13  1.0926E-12
  6.1074E-14 -8.0401E-14 -9.5544E-14  4.8128E-14 -2.2091E-13 -9.4593E-13
 -2.3930E-13  5.1323E-13  2.5127E-13 -2.2091E-13  2.0905E-12  6.2466E-12
 -1.7633E-12  2.3000E-12  1.0926E-12 -9.4593E-13  6.2466E-12  2.7038E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -8.771565  172.956382   -0.063928   -0.151455   -0.982086  2456368.614348
# Heliocentric elements and errors
Epoch:              2456368.5000  =  2013/03/17
Mean Anomaly:          264.41531 +/-     0.117
Argument of Peri:      328.08731 +/-     0.068
Long of Asc Node:      331.97436 +/-     0.001
Inclination:            22.90635 +/-     0.001
Eccentricity:         0.28328577 +/-    0.0003
Semi-Major Axis:     54.42332338 +/-    0.0215
Time of Perihelion: 2495305.4413 +/-      79.5
Perihelion:          39.00597038 +/-    0.0206
Aphelion:            69.84067637 +/-    0.0308
Period (y)              401.5002 +/-      0.24
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -58.77157995 +/-    0.0049
Ecliptic Y            7.19920772 +/-    0.0006
Ecliptic Z           -8.98326238 +/-    0.0008
Ecliptic XDOT         0.00043054 +/-    0.0000
Ecliptic YDOT        -0.00196025 +/-    0.0000
Ecliptic ZDOT        -0.00064569 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   59.88863853 +/-    0.0048
Geocenter to KBO     58.90686972 +/-    0.0050
# Hcoef:  5.79

The following table shows the complete astrometric record for 16FX58. 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 (16FX58) followed by the observatory code and reference code for the source of the astrometry.

2013 03  17.11357  11 20 14.96   -05 15 42.1   23.2r 16FX58    W84  C~2fCQ      
2013 03  17.17579  11 20 14.75   -05 15 41.0         16FX58    W84  C~2fCQ      
2013 03  17.23999  11 20 14.53   -05 15 39.7         16FX58    W84  C~2fCQ      
2016 03  28.03491  11 25 54.48   -06 44 23.1   23.7V 16FX58    W84  C~1qoJ      
2016 03  28.04185  11 25 54.48   -06 44 22.9         16FX58    W84  C~1qoJ      
2016 03  28.04879  11 25 54.48   -06 44 23.0         16FX58    W84  C~1qoJ      
2016 03  29.03309  11 25 51.22   -06 44 02.4         16FX58    W84  C~1qoJ      
2016 03  29.04003  11 25 51.23   -06 44 02.4         16FX58    W84  C~1qoJ      
2016 03  29.04697  11 25 51.24   -06 44 02.4         16FX58    W84  C~1qoJ      
2016 03  30.05924  11 25 47.89   -06 43 41.0         16FX58    W84  C~1qoJ      
2016 03  30.06618  11 25 47.89   -06 43 41.3         16FX58    W84  C~1qoJ      
2016 03  30.07312  11 25 47.88   -06 43 41.4         16FX58    W84  C~1qoJ      
2016 04  01.06375  11 25 41.47   -06 42 59.6         16FX58    W84  C~1qoJ      
2016 04  01.07069  11 25 41.47   -06 42 59.5         16FX58    W84  C~1qoJ      
2016 04  01.07763  11 25 41.48   -06 42 59.7         16FX58    W84  C~1qoJ      
2018 04  12.08383  11 29 25.606  -07 41 54.48  23.6r 16FX58    807  C~2fCQ      
2018 04  13.07444  11 29 22.715  -07 41 33.36  23.5r 16FX58    807  C~2fCQ      
2018 05  16.04451  11 28 10.394  -07 31 05.71  23.6r 16FX58    304  C~2fCQ      
2018 05  16.96556  11 28 09.167  -07 30 51.48  23.6r 16FX58    304  C~2fCQ      
2020 02  25.27575  11 36 21.79   -08 59 55.7   22.7i 16FX58    W84  C~3jrk      
2020 02  25.30124  11 36 21.71   -08 59 55.4         16FX58    W84  C~3jrk      
2020 02  26.26268  11 36 18.51   -08 59 42.0         16FX58    W84  C~3jrk      
2020 02  26.28824  11 36 18.44   -08 59 41.8         16FX58    W84  C~3jrk      

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     0.01
     2   0.0002      0.00    -0.03       0.00    -0.09
     3   0.0003      0.00    -0.04       0.00    -0.04
     4   3.0306      0.00    -0.33       0.00     0.06
     5   3.0306      0.00     0.02       0.00     0.12
     6   3.0306      0.00     0.36       0.00    -0.13
     7   3.0333      0.00    -0.40       0.00     0.18
     8   3.0333      0.00     0.09       0.00     0.03
     9   3.0334      0.00     0.58       0.00    -0.11
    10   3.0361      0.00    -0.45       0.00     0.36
    11   3.0361      0.00    -0.11       0.00    -0.08
    12   3.0362      0.00     0.08       0.00    -0.33
    13   3.0416      0.00    -0.27       0.00     0.17
    14   3.0416      0.00     0.07       0.00     0.13
    15   3.0417      0.00     0.55       0.00    -0.21
    16   5.0704      0.00    -0.04       0.00     0.04
    17   5.0731      0.00     0.09       0.00     0.21
    18   5.1634      0.00     0.03       0.00    -0.02
    19   5.1659      0.00    -0.16       0.00    -0.12
    20   6.9436      0.00    -0.04       0.00     0.03
    21   6.9437      0.00     0.05       0.00    -0.02
    22   6.9463      0.00    -0.16       0.00     0.00
    23   6.9464      0.00     0.09       0.00    -0.16

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.

16FX58    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        54.202    54.202    54.202
ecceobj         0.286     0.286     0.286
incobj         22.977    22.977    22.977
qmin           37.723    37.695    37.708
qmax           72.164    72.139    72.120
amean          54.541    54.541    54.541
amin           54.028    53.999    54.007
amax           55.227    55.215    55.216
emean           0.290     0.290     0.290
emin            0.275     0.275     0.275
emax            0.307     0.307     0.306
imean          23.876    23.876    23.876
imin           23.451    23.454    23.450
imax           24.386    24.387    24.384
excite_mean     0.498     0.498     0.498
fracstop        1.000     1.000     1.000
cjmean          2.907     2.907     2.907

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       163.7     163.7     163.8
kozaiamp        180.0     180.0     180.0