Orbit Fit and Astrometric record for 13TO228

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: 13TO228   
# Created Wed Dec 25 02:09:41 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     18 observations of     18
# Arc:   6.05y
# First observation: 2013/10/13
#  Last observation: 2019/11/01
# Chi-squared of fit:     8.95 DOF:     30 RMS:  0.12
# Min/Max residuals:    -0.28    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.439028E-05  2.008948E-02  5.712266E-07  1.120276E-03  2.220362E-02  2.345734E-04
# Covariance matrix:
  2.3276E-13 -1.2979E-13  2.5449E-15 -5.3306E-15  4.7563E-14 -8.2234E-13
 -1.2979E-13  2.1136E-13 -6.0028E-15  1.1561E-14  3.8301E-14  1.7771E-12
  2.5449E-15 -6.0028E-15  1.7780E-13 -3.9509E-14 -2.3819E-15 -5.4668E-14
 -5.3306E-15  1.1561E-14 -3.9509E-14  1.6750E-14  2.4417E-15  1.0520E-13
  4.7563E-14  3.8301E-14 -2.3819E-15  2.4417E-15  3.3398E-13  3.6070E-13
 -8.2234E-13  1.7771E-12 -5.4668E-14  1.0520E-13  3.6070E-13  1.6171E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.841473    5.323250   -0.245672   -0.014085   -0.966598  2456578.595508
# Heliocentric elements and errors
Epoch:              2456578.5000  =  2013/10/13
Mean Anomaly:          160.73922 +/-     0.242
Argument of Peri:      183.16122 +/-     0.240
Long of Asc Node:       20.06131 +/-     0.001
Inclination:             3.30275 +/-     0.000
Eccentricity:         0.04597652 +/-    0.0001
Semi-Major Axis:     44.08189966 +/-    0.0044
Time of Perihelion: 2408846.6540 +/-      72.1
Perihelion:          42.05516714 +/-    0.0054
Aphelion:            46.10863217 +/-    0.0057
Period (y)              292.6838 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           45.77781011 +/-    0.0012
Ecliptic Y            4.51527713 +/-    0.0001
Ecliptic Z           -0.66142555 +/-    0.0000
Ecliptic XDOT        -0.00020517 +/-    0.0000
Ecliptic YDOT         0.00246791 +/-    0.0000
Ecliptic ZDOT         0.00013784 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.00469812 +/-    0.0012
Geocenter to KBO     45.03773588 +/-    0.0012
# Hcoef:  7.16

The following table shows the complete astrometric record for 13TO228. 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 (13TO228) followed by the observatory code and reference code for the source of the astrometry.

2013 10  13.09473  00 20 52.750  +01 20 32.31  23.1z 13TO228   W84  C~52Rf      
2013 10  13.11927  00 20 52.654  +01 20 31.79  23.2i 13TO228   W84  C~52Rf      
2013 11  22.07262  00 18 44.668  +01 07 38.91  23.7r 13TO228   W84  C~52Rf      
2013 11  22.07399  00 18 44.662  +01 07 39.10  23.1i 13TO228   W84  C~52Rf      
2013 11  23.09272  00 18 42.559  +01 07 27.15  23.6r 13TO228   W84  C~52Rf      
2013 11  23.09414  00 18 42.542  +01 07 27.06  22.7i 13TO228   W84  C~52Rf      
2014 08  18.31064  00 28 32.743  +02 13 49.96  23.8i 13TO228   W84  C~52Rf      
2014 10  28.18822  00 24 03.370  +01 45 33.82  23.6r 13TO228   W84  C~52Rf      
2014 10  29.13917  00 23 59.999  +01 45 12.97  23.5z 13TO228   W84  C~52Rf      
2016 11  18.09930  00 31 08.755  +02 40 07.35  23.2i 13TO228   W84  C~52Rf      
2016 11  18.10069  00 31 08.750  +02 40 07.33  23.6r 13TO228   W84  C~52Rf      
2016 11  28.10122  00 30 46.420  +02 37 58.58  23.1r 13TO228   W84  C~52Rf      
2017 08  22.32044  00 40 38.339  +03 43 59.64  24.2r 13TO228   W84  C~52Rf      
2017 08  22.32182  00 40 38.343  +03 43 59.61  23.7i 13TO228   W84  C~52Rf      
2018 11  26.06832  00 39 01.357  +03 39 08.98  24.2g 13TO228   W84  C~52Rf      
2019 11  01.27583  00 44 23.13   +04 17 01.1   25.4g 13TO228   T09  C~83Bh      
2019 11  01.33193  00 44 22.92   +04 17 00.1   25.0g 13TO228   T09  C~83Bh      
2019 11  01.50543  00 44 22.27   +04 16 55.9   25.4g 13TO228   T09  C~83Bh      

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    -0.03       0.00     0.04
     2   0.0001      0.00     0.02       0.00     0.12
     3   0.1095      0.00     0.16       0.00    -0.11
     4   0.1095      0.00     0.12       0.00     0.10
     5   0.1122      0.00    -0.07       0.00    -0.06
     6   0.1123      0.00    -0.28       0.00    -0.14
     7   0.8466      0.00     0.18       0.00     0.01
     8   1.0406      0.00    -0.06       0.00     0.24
     9   1.0432      0.00    -0.01       0.00    -0.01
    10   3.0993      0.00     0.10       0.00    -0.13
    11   3.0993      0.00     0.08       0.00    -0.13
    12   3.1266      0.00     0.01       0.00     0.01
    13   3.8582      0.00    -0.18       0.00     0.03
    14   3.8583      0.00    -0.06       0.00     0.02
    15   5.1197      0.00     0.11       0.00    -0.27
    16   6.0511      0.00     0.03       0.00     0.05
    17   6.0513      0.00     0.02       0.00     0.30
    18   6.0518      0.00    -0.06       0.00    -0.05

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.

13TO228    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.331    44.331    44.331
ecceobj         0.041     0.041     0.041
incobj          3.292     3.292     3.292
qmin           41.306    41.274    41.316
qmax           47.156    47.143    47.170
amean          44.118    44.118    44.118
amin           43.774    43.775    43.774
amax           44.471    44.473    44.472
emean           0.045     0.045     0.045
emin            0.029     0.029     0.029
emax            0.061     0.061     0.061
imean           3.234     3.234     3.234
imin            2.520     2.520     2.520
imax            3.798     3.798     3.799
excite_mean     0.072     0.072     0.072
fracstop        1.000     1.000     1.000
cjmean          3.096     3.096     3.096

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       178.6     178.6     178.5
kozaiamp        180.0     180.0     180.0