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 Nov 30 02:11:53 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     14 observations of     14
# Arc:   5.05y
# First observation: 2013/09/01
#  Last observation: 2018/09/18
# Chi-squared of fit:     2.87 DOF:     22 RMS:  0.08
# Min/Max residuals:    -0.29    0.13
# Exact a, adot, b, bdot, g, gdot:
  1.454776E-05  1.822963E-02 -4.508740E-06 -7.545347E-03  2.043665E-02 -1.061072E-02
# Covariance matrix:
  5.2460E-13  2.7909E-13  6.2483E-14 -1.1767E-13  1.3875E-12  3.2848E-12
  2.7909E-13  1.2399E-12  8.9066E-14 -5.4823E-13  1.3721E-12  1.4726E-11
  6.2483E-14  8.9066E-14  1.4890E-13 -6.9276E-14  2.3427E-13  1.0195E-12
 -1.1767E-13 -5.4823E-13 -6.9276E-14  2.8015E-13 -5.4343E-13 -6.7101E-12
  1.3875E-12  1.3721E-12  2.3427E-13 -5.4343E-13  5.0396E-12  1.5015E-11
  3.2848E-12  1.4726E-11  1.0195E-12 -6.7101E-12  1.5015E-11  1.8004E-10
#      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:          345.10990 +/-     0.051
Argument of Peri:      222.39780 +/-     0.028
Long of Asc Node:      172.27217 +/-     0.001
Inclination:            26.05436 +/-     0.000
Eccentricity:         0.65416175 +/-    0.0009
Semi-Major Axis:    103.05223007 +/-    0.2339
Time of Perihelion: 2472340.9617 +/-    1248.4
Perihelion:          35.63940327 +/-    0.1224
Aphelion:           170.46505688 +/-    0.3977
Period (y)             1046.1508 +/-      3.56
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           39.01881684 +/-    0.0042
Ecliptic Y          -28.89131158 +/-    0.0032
Ecliptic Z           11.43171567 +/-    0.0013
Ecliptic XDOT         0.00054084 +/-    0.0000
Ecliptic YDOT         0.00264056 +/-    0.0000
Ecliptic ZDOT        -0.00131482 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   49.87884978 +/-    0.0037
Geocenter to KBO     48.93214403 +/-    0.0054
# Hcoef:  6.42

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      

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     0.00       0.00    -0.29
     2   0.0247      0.00     0.04       0.00     0.13
     3   0.0247      0.00     0.05       0.00     0.02
     4   0.0327      0.00     0.12       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     0.01       0.00     0.05
     9   0.0765      0.00     0.05       0.00     0.00
    10   0.1066      0.00    -0.04       0.00     0.03
    11   0.1092      0.00     0.01       0.00    -0.01
    12   4.1091      0.00    -0.04       0.00     0.02
    13   4.1092      0.00     0.05       0.00    -0.04
    14   5.0460      0.00    -0.01       0.00     0.02

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       104.339   104.338   104.341
ecceobj         0.658     0.658     0.658
incobj         25.989    25.989    25.989
qmin           34.512    34.488    34.379
qmax          176.531   177.046   177.014
amean         103.117   103.051   103.082
amin          100.956   100.853   100.974
amax          106.116   106.247   106.161
emean           0.650     0.649     0.656
emin            0.633     0.630     0.644
emax            0.665     0.666     0.667
imean          25.743    25.859    25.005
imin           24.864    24.879    24.627
imax           27.208    27.569    25.627
excite_mean     0.782     0.782     0.780
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       278.4     262.3     281.0
kozaiamp        180.0     180.0      59.1