Orbit Fit and Astrometric record for 13FS28

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: 13FS28    
# Created Fri Dec  3 02:11:36 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     33 observations of     33
# Arc:   7.85y
# First observation: 2013/03/16
#  Last observation: 2021/01/19
# Chi-squared of fit:    40.62 DOF:     60 RMS:  0.20
# Min/Max residuals:    -0.42    0.52
# Exact a, adot, b, bdot, g, gdot:
  1.033210E-05  6.358160E-03  2.851807E-06  1.451267E-03  1.149946E-02 -6.202621E-03
# Covariance matrix:
  2.1858E-13  1.3821E-14 -5.4453E-15  8.4843E-15  1.6498E-13  7.4731E-13
  1.3821E-14  6.4639E-14 -9.1772E-15  1.6381E-14  1.0969E-13  1.4453E-12
 -5.4453E-15 -9.1772E-15  1.3096E-13 -2.2298E-14 -1.7201E-14 -2.2025E-13
  8.4843E-15  1.6381E-14 -2.2298E-14  8.9609E-15  2.8880E-14  3.9421E-13
  1.6498E-13  1.0969E-13 -1.7201E-14  2.8880E-14  3.5304E-13  2.5462E-12
  7.4731E-13  1.4453E-12 -2.2025E-13  3.9421E-13  2.5462E-12  3.4782E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.939669 -163.431977    0.353332   -0.031431   -0.930143  2456367.749828
# Heliocentric elements and errors
Epoch:              2456368.5000  =  2013/03/17
Mean Anomaly:          335.90813 +/-     0.078
Argument of Peri:      104.75059 +/-     0.024
Long of Asc Node:      204.62238 +/-     0.000
Inclination:            13.08878 +/-     0.001
Eccentricity:         0.73755648 +/-    0.0006
Semi-Major Axis:    136.61295251 +/-    0.2884
Time of Perihelion: 2495399.0100 +/-    1727.8
Perihelion:          35.85318456 +/-    0.1145
Aphelion:           237.37272046 +/-    0.5084
Period (y)             1596.7834 +/-      5.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -84.29412372 +/-    0.0043
Ecliptic Y          -24.70797118 +/-    0.0013
Ecliptic Z           -2.94313791 +/-    0.0002
Ecliptic XDOT         0.00182881 +/-    0.0000
Ecliptic YDOT        -0.00103281 +/-    0.0000
Ecliptic ZDOT         0.00039545 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   87.89070133 +/-    0.0041
Geocenter to KBO     86.96138053 +/-    0.0045
# Hcoef:  4.92

The following table shows the complete astrometric record for 13FS28. 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 (13FS28) followed by the observatory code and reference code for the source of the astrometry.

2013 03  16.24905  12 58 03.652  -08 18 12.61  24.4r 13FS28    807  C~1x8W      
2013 03  16.29597  12 58 03.547  -08 18 11.68        13FS28    807  C~1x8W      
2013 03  16.35182  12 58 03.446  -08 18 11.37        13FS28    807  C~1x8W      
2013 05  06.08131  12 56 11.77   -08 05 48.75        13FS28    807  C~1x8W      
2013 05  06.12769  12 56 11.68   -08 05 48.11        13FS28    807  C~1x8W      
2013 07  07.98706  12 55 12.639  -07 57 30.26        13FS28    304  C~1x8W      
2013 07  08.02453  12 55 12.649  -07 57 30.26        13FS28    304  C~1x8W      
2013 07  08.06743  12 55 12.670  -07 57 30.15        13FS28    304  C~1x8W      
2014 03  28.27346  12 59 07.469  -08 19 14.83        13FS28    807  C~1x8W      
2014 03  28.34443  12 59 07.300  -08 19 13.91        13FS28    807  C~1x8W      
2014 05  01.17108  12 57 51.307  -08 10 47.27        13FS28    304  C~1x8W      
2014 05  01.21310  12 57 51.237  -08 10 46.40  24.0r 13FS28    304  C~1x8W      
2014 05  02.17315  12 57 49.270  -08 10 32.96        13FS28    304  C~1x8W      
2019 05  05.02015  13 05 29.360  -08 29 25.95  24.0r 13FS28    807  C~4Z7u      
2019 05  05.23853  13 05 28.925  -08 29 22.93  24.1r 13FS28    807  C~4Z7u      
2019 05  07.17729  13 05 24.869  -08 28 55.57        13FS28    G37  C~4Z7u      
2019 05  07.18458  13 05 24.857  -08 28 55.31        13FS28    G37  C~4Z7u      
2019 05  07.19190  13 05 24.843  -08 28 55.32        13FS28    G37  C~4Z7u      
2019 05  07.19923  13 05 24.825  -08 28 55.02        13FS28    G37  C~4Z7u      
2019 05  07.24600  13 05 24.724  -08 28 54.39        13FS28    G37  C~4Z7u      
2019 05  07.25328  13 05 24.700  -08 28 54.33        13FS28    G37  C~4Z7u      
2019 05  07.26055  13 05 24.691  -08 28 54.17        13FS28    G37  C~4Z7u      
2019 05  07.26787  13 05 24.681  -08 28 54.25        13FS28    G37  C~4Z7u      
2020 05  27.20052  13 06 23.752  -08 28 29.09  24.2r 13FS28    G37  C~4Z7u      
2020 05  27.20807  13 06 23.746  -08 28 29.05  24.2r 13FS28    G37  C~4Z7u      
2020 05  27.21548  13 06 23.737  -08 28 28.99  24.2r 13FS28    G37  C~4Z7u      
2020 05  27.26651  13 06 23.656  -08 28 28.33  24.3r 13FS28    G37  C~4Z7u      
2020 05  27.27379  13 06 23.640  -08 28 28.41  24.2r 13FS28    G37  C~4Z7u      
2020 06  11.20680  13 06 05.199  -08 26 08.56        13FS28    G37  C~4Z7u      
2020 06  11.26396  13 06 05.149  -08 26 08.04        13FS28    G37  C~4Z7u      
2020 06  11.28924  13 06 05.111  -08 26 07.74  23.8r 13FS28    G37  C~4Z7u      
2021 01  17.34510  13 11 51.907  -08 57 24.53  24.2r 13FS28    304  C~4Z7u      
2021 01  19.34288  13 11 51.659  -08 57 22.98  24.0r 13FS28    304  C~4Z7u      

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    -0.37       0.00    -0.04
     2   0.0001      0.00    -0.42       0.00     0.26
     3   0.0003      0.00    -0.12       0.00    -0.19
     4   0.1392      0.00     0.27       0.00    -0.35
     5   0.1393      0.00     0.30       0.00    -0.34
     6   0.3114      0.00    -0.20       0.00     0.11
     7   0.3115      0.00    -0.19       0.00     0.09
     8   0.3116      0.00    -0.03       0.00     0.17
     9   1.0322      0.00     0.52       0.00    -0.09
    10   1.0324      0.00     0.44       0.00    -0.22
    11   1.1250      0.00    -0.19       0.00     0.18
    12   1.1252      0.00     0.08       0.00     0.45
    13   1.1278      0.00     0.24       0.00     0.21
    14   6.1349      0.00    -0.22       0.00    -0.03
    15   6.1355      0.00     0.27       0.00    -0.14
    16   6.1408      0.00    -0.15       0.00    -0.20
    17   6.1408      0.00    -0.10       0.00    -0.04
    18   6.1408      0.00    -0.08       0.00    -0.16
    19   6.1409      0.00    -0.12       0.00     0.04
    20   6.1410      0.00    -0.16       0.00     0.01
    21   6.1410      0.00    -0.29       0.00    -0.03
    22   6.1410      0.00    -0.20       0.00     0.02
    23   6.1411      0.00    -0.12       0.00    -0.16
    24   7.1977      0.00     0.01       0.00     0.09
    25   7.1977      0.00     0.10       0.00     0.05
    26   7.1977      0.00     0.13       0.00     0.03
    27   7.1979      0.00     0.09       0.00     0.13
    28   7.1979      0.00     0.02       0.00    -0.03
    29   7.2388      0.00     0.11       0.00    -0.10
    30   7.2389      0.00     0.21       0.00    -0.02
    31   7.2390      0.00     0.01       0.00     0.08
    32   7.8415      0.00     0.00       0.00     0.12
    33   7.8469      0.00     0.12       0.00     0.17

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.

13FS28    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       135.940   135.938   135.943
ecceobj         0.739     0.739     0.739
incobj         13.140    13.140    13.140
qmin           34.682    34.663    34.665
qmax          252.081   250.761   252.159
amean         136.392   135.751   134.005
amin          130.083   131.611   128.971
amax          143.987   143.331   144.089
emean           0.734     0.733     0.729
emin            0.721     0.721     0.714
emax            0.751     0.750     0.750
imean          14.434    14.303    14.438
imin           13.261    13.263    13.261
imax           15.678    14.930    15.578
excite_mean     0.775     0.773     0.770
fracstop        1.000     1.000     1.000
cjmean          3.021     3.022     3.022

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       189.1     167.9     186.4
kozaiamp         83.9      60.3      80.9