Orbit Fit and Astrometric record for 13RT155

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: 13RT155   
# Created Tue Apr  1 01:09:36 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     16 observations of     16
# Arc:  11.08y
# First observation: 2013/09/01
#  Last observation: 2024/10/01
# Chi-squared of fit:     4.68 DOF:     26 RMS:  0.10
# Min/Max residuals:    -0.30    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.461532E-05  1.822995E-02 -4.482757E-06 -7.545502E-03  2.043695E-02 -1.060672E-02
# Covariance matrix:
  4.6420E-13  1.3645E-14  4.8381E-14 -2.4263E-15  1.1148E-12  2.9302E-14
  1.3645E-14  6.7626E-14  1.9376E-14 -2.5831E-14  1.8198E-13  2.8154E-13
  4.8381E-14  1.9376E-14  1.3531E-13 -2.1100E-14  1.8206E-13  7.5900E-14
 -2.4263E-15 -2.5831E-14 -2.1100E-14  1.6326E-14 -4.6721E-14 -1.1948E-13
  1.1148E-12  1.8198E-13  1.8206E-13 -4.6721E-14  3.7951E-12  5.1825E-13
  2.9302E-14  2.8154E-13  7.5900E-14 -1.1948E-13  5.1825E-13  1.3014E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   13.510898  -36.837681   -0.268386    0.227648   -0.947110  2456536.659628
# Heliocentric elements and errors
Epoch:              2456536.5000  =  2013/09/01
Mean Anomaly:          345.09528 +/-     0.022
Argument of Peri:      222.39263 +/-     0.023
Long of Asc Node:      172.27213 +/-     0.000
Inclination:            26.05440 +/-     0.000
Eccentricity:         0.65391209 +/-    0.0003
Semi-Major Axis:    102.99089100 +/-    0.1029
Time of Perihelion: 2472342.3556 +/-     548.9
Perihelion:          35.64390206 +/-    0.0458
Aphelion:           170.33787995 +/-    0.1726
Period (y)             1045.2169 +/-      1.57
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           39.01826316 +/-    0.0036
Ecliptic Y          -28.89089269 +/-    0.0027
Ecliptic Z           11.43155016 +/-    0.0011
Ecliptic XDOT         0.00054128 +/-    0.0000
Ecliptic YDOT         0.00264025 +/-    0.0000
Ecliptic ZDOT        -0.00131470 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   49.87813591 +/-    0.0033
Geocenter to KBO     48.93143013 +/-    0.0047
# Hcoef:  6.30

The following table shows the complete astrometric record for 13RT155. 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 (13RT155) followed by the observatory code and reference code for the source of the astrometry.

2013 09  01.15885  21 24 25.420  -01 00 17.18  23.6g 13RT155   W84  C~52RK      
2013 09  10.16600  21 23 54.972  -01 04 26.96  23.5r 13RT155   W84  C~52RK      
2013 09  10.16736  21 23 54.968  -01 04 27.10  23.2i 13RT155   W84  C~52RK      
2013 09  13.11802  21 23 45.639  -01 05 50.73  22.8i 13RT155   W84  C~52RK      
2013 09  13.12082  21 23 45.623  -01 05 50.87  22.9z 13RT155   W84  C~52RK      
2013 09  23.03700  21 23 17.103  -01 10 34.07  24.1g 13RT155   W84  C~52RK      
2013 09  24.03670  21 23 14.489  -01 11 02.45  23.7g 13RT155   W84  C~52RK      
2013 09  29.11050  21 23 02.119  -01 13 26.56  23.5r 13RT155   W84  C~52RK      
2013 09  29.11609  21 23 02.108  -01 13 26.77  23.5i 13RT155   W84  C~52RK      
2013 10  10.07773  21 22 40.700  -01 18 29.41  23.6r 13RT155   W84  C~52RK      
2013 10  11.05883  21 22 39.174  -01 18 55.68  23.5z 13RT155   W84  C~52RK      
2017 10  11.00195  21 41 15.591  -01 38 57.91  22.9r 13RT155   W84  C~52RK      
2017 10  11.04610  21 41 15.511  -01 38 59.18  23.8g 13RT155   W84  C~52RK      
2018 09  18.20554  21 47 11.980  -01 32 52.76  22.8z 13RT155   W84  C~52RL      
2024 10  01.104980 22 18 32.891  -02 11 05.25  20.8G 13RT155   G37  C~8GyC      
2024 10  01.190140 22 18 32.611  -02 11 08.35        13RT155   G37  C~8GyC      

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    -0.01       0.00    -0.30
     2   0.0247      0.00     0.04       0.00     0.12
     3   0.0247      0.00     0.04       0.00     0.02
     4   0.0327      0.00     0.11       0.00     0.03
     5   0.0328      0.00     0.01       0.00    -0.03
     6   0.0599      0.00    -0.03       0.00    -0.03
     7   0.0626      0.00    -0.16       0.00     0.11
     8   0.0765      0.00     0.02       0.00     0.06
     9   0.0765      0.00     0.05       0.00     0.00
    10   0.1066      0.00    -0.03       0.00     0.03
    11   0.1092      0.00     0.02       0.00    -0.00
    12   4.1091      0.00    -0.07       0.00     0.02
    13   4.1092      0.00     0.02       0.00    -0.03
    14   5.0460      0.00     0.05       0.00     0.02
    15  11.0827      0.00     0.05       0.00     0.22
    16  11.0829      0.00    -0.06       0.00    -0.23

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.

13RT155    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       104.276   104.274   104.278
ecceobj         0.658     0.658     0.658
incobj         25.989    25.989    25.989
qmin           34.904    34.904    34.903
qmax          176.264   176.002   176.298
amean         103.219   103.097   103.108
amin          101.143   101.106   101.019
amax          106.482   106.201   106.281
emean           0.649     0.649     0.648
emin            0.633     0.633     0.627
emax            0.661     0.661     0.661
imean          25.982    25.917    26.002
imin           25.175    25.175    25.175
imax           27.567    27.198    27.816
excite_mean     0.783     0.783     0.783
fracstop        1.000     1.000     1.000
cjmean          2.824     2.824     2.824

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       271.6     270.2     274.4
kozaiamp         58.8      55.1      62.9