Orbit Fit and Astrometric record for 13RY155

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: 13RY155   
# Created Fri Dec  3 02:11:52 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     16 observations of     16
# Arc:   5.03y
# First observation: 2013/09/02
#  Last observation: 2018/09/14
# Chi-squared of fit:     7.32 DOF:     26 RMS:  0.12
# Min/Max residuals:    -0.23    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.455387E-05  1.885787E-02  2.077715E-06  3.405453E-03  2.176255E-02  3.869445E-03
# Covariance matrix:
  3.9392E-13 -3.8520E-15 -6.4251E-15  1.2884E-14  2.9478E-13  8.0371E-13
 -3.8520E-15  2.7686E-13 -1.5272E-14  5.2152E-14  2.5531E-13  3.3330E-12
 -6.4251E-15 -1.5272E-14  2.4625E-13 -6.2066E-14 -2.0809E-14 -2.0229E-13
  1.2884E-14  5.2152E-14 -6.2066E-14  3.3630E-14  5.5197E-14  6.8540E-13
  2.9478E-13  2.5531E-13 -2.0809E-14  5.5197E-14  6.7599E-13  3.4932E-12
  8.0371E-13  3.3330E-12 -2.0229E-13  6.8540E-13  3.4932E-12  4.3791E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -4.005037   -0.755744    0.338667   -0.066379   -0.949292  2456537.782588
# Heliocentric elements and errors
Epoch:              2456538.5000  =  2013/09/03
Mean Anomaly:           92.05919 +/-     0.058
Argument of Peri:      225.25457 +/-     0.041
Long of Asc Node:       19.70073 +/-     0.001
Inclination:            10.89902 +/-     0.000
Eccentricity:         0.19364130 +/-    0.0003
Semi-Major Axis:     44.96109930 +/-    0.0061
Time of Perihelion: 2428379.4210 +/-      18.6
Perihelion:          36.25477354 +/-    0.0139
Aphelion:            53.66742507 +/-    0.0149
Period (y)              301.4835 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           46.78113328 +/-    0.0017
Ecliptic Y           -0.95264128 +/-    0.0000
Ecliptic Z           -3.20928925 +/-    0.0001
Ecliptic XDOT         0.00054059 +/-    0.0000
Ecliptic YDOT         0.00236433 +/-    0.0000
Ecliptic ZDOT         0.00039352 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.90063934 +/-    0.0017
Geocenter to KBO     45.95040966 +/-    0.0017
# Hcoef:  7.06

The following table shows the complete astrometric record for 13RY155. 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 (13RY155) followed by the observatory code and reference code for the source of the astrometry.

2013 09  02.28181  00 03 36.565  -03 58 28.63  24.2g 13RY155   W84  C~52RL      
2013 09  10.31315  00 03 05.225  -04 01 47.85  24.6g 13RY155   W84  C~52RL      
2013 09  10.31452  00 03 05.220  -04 01 47.67  23.3r 13RY155   W84  C~52RL      
2013 10  13.12737  00 00 52.404  -04 14 43.86  23.6i 13RY155   W84  C~52RL      
2013 11  08.15222  23 59 25.986  -04 21 44.86  23.2r 13RY155   W84  C~52RL      
2013 12  02.10754  23 58 41.709  -04 23 44.12  24.4r 13RY155   W84  C~52RL      
2016 08  26.20647  00 14 49.878  -02 07 16.76  23.6r 13RY155   W84  C~52RL      
2016 12  04.10012  00 09 23.143  -02 36 37.32  23.5i 13RY155   W84  C~52RL      
2016 12  04.10151  00 09 23.149  -02 36 37.21  23.8r 13RY155   W84  C~52RL      
2017 09  18.23051  00 16 56.940  -01 40 34.58  23.4i 13RY155   W84  C~52RL      
2017 09  18.23188  00 16 56.955  -01 40 34.73  23.7r 13RY155   W84  C~52RL      
2017 09  18.23326  00 16 56.938  -01 40 34.90  24.4g 13RY155   W84  C~52RL      
2017 11  09.06291  00 13 44.428  -01 58 22.15  23.8r 13RY155   W84  C~52RL      
2018 09  14.30686  00 20 45.115  -01 03 19.27  23.9r 13RY155   W84  C~52RL      
2018 09  14.30823  00 20 45.101  -01 03 19.55  23.4i 13RY155   W84  C~52RL      
2018 09  14.30960  00 20 45.119  -01 03 19.38  24.2g 13RY155   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    -0.19       0.00     0.00
     2   0.0220      0.00     0.13       0.00    -0.23
     3   0.0220      0.00     0.14       0.00    -0.02
     4   0.1118      0.00     0.04       0.00     0.06
     5   0.1831      0.00     0.03       0.00     0.10
     6   0.2487      0.00    -0.17       0.00     0.15
     7   2.9813      0.00    -0.01       0.00    -0.07
     8   3.2548      0.00     0.02       0.00    -0.11
     9   3.2548      0.00     0.13       0.00    -0.00
    10   4.0437      0.00    -0.13       0.00     0.20
    11   4.0437      0.00     0.18       0.00     0.08
    12   4.0437      0.00     0.01       0.00    -0.06
    13   4.1856      0.00    -0.07       0.00    -0.11
    14   5.0322      0.00    -0.04       0.00     0.11
    15   5.0322      0.00    -0.17       0.00    -0.14
    16   5.0322      0.00     0.18       0.00     0.07

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.

13RY155    quality flag:3

Type:      11:6EEEEE 11:6EEEEE 11:6EEEEE

axisobj        45.203    45.203    45.203
ecceobj         0.193     0.193     0.193
incobj         10.872    10.872    10.872
qmin           35.460    35.462    35.459
qmax           55.279    55.239    55.257
amean          45.103    45.103    45.103
amin           44.663    44.660    44.674
amax           45.614    45.614    45.615
emean           0.199     0.199     0.199
emin            0.184     0.184     0.185
emax            0.212     0.212     0.212
imean          10.430    10.433    10.425
imin            9.620     9.634     9.610
imax           11.201    11.202    11.200
excite_mean     0.269     0.269     0.269
fracstop        1.000     1.000     1.000
cjmean          3.026     3.026     3.026

libcent 0       179.1     178.1     181.4
libamp  0       116.5     109.4     114.4
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       176.9     176.3     177.2
kozaiamp        179.9     180.0     180.0