Orbit Fit and Astrometric record for 13RQ155

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: 13RQ155   
# Created Tue Dec  7 02:11:55 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     13 observations of     13
# Arc:   5.18y
# First observation: 2013/09/01
#  Last observation: 2018/11/07
# Chi-squared of fit:     5.49 DOF:     20 RMS:  0.11
# Min/Max residuals:    -0.19    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.552913E-05  2.389868E-02 -4.355771E-06 -7.245235E-03  2.438445E-02 -6.937820E-03
# Covariance matrix:
  5.1713E-13 -2.6982E-13  1.0445E-14 -1.4972E-14  5.6044E-13 -1.7617E-12
 -2.6982E-13  3.1888E-13  3.3113E-14 -7.4016E-14  1.8538E-13  2.3708E-12
  1.0445E-14  3.3113E-14  3.8364E-13 -1.4341E-13  4.2618E-13  9.2474E-14
 -1.4972E-14 -7.4016E-14 -1.4341E-13  1.2907E-13 -8.4226E-13 -2.5793E-13
  5.6044E-13  1.8538E-13  4.2618E-13 -8.4226E-13  8.9999E-12 -2.5523E-12
 -1.7617E-12  2.3708E-12  9.2474E-14 -2.5793E-13 -2.5523E-12  2.1969E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -36.119825  -67.461473   -0.726454   -0.413903   -0.567310  2456536.600808
# Heliocentric elements and errors
Epoch:              2456536.5000  =  2013/09/01
Mean Anomaly:          320.91785 +/-     0.045
Argument of Peri:      318.56489 +/-     0.066
Long of Asc Node:       49.97720 +/-     0.001
Inclination:            38.53172 +/-     0.000
Eccentricity:         0.31209799 +/-    0.0003
Semi-Major Axis:     51.07770471 +/-    0.0318
Time of Perihelion: 2471011.5953 +/-     112.1
Perihelion:          35.13645575 +/-    0.0257
Aphelion:            67.01895368 +/-    0.0438
Period (y)              365.0524 +/-      0.34
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           13.63822582 +/-    0.0016
Ecliptic Y          -30.96425645 +/-    0.0038
Ecliptic Z          -24.17439729 +/-    0.0030
Ecliptic XDOT         0.00204718 +/-    0.0000
Ecliptic YDOT         0.00205152 +/-    0.0000
Ecliptic ZDOT        -0.00019780 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.58367972 +/-    0.0033
Geocenter to KBO     41.00997859 +/-    0.0050
# Hcoef:  7.28

The following table shows the complete astrometric record for 13RQ155. 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 (13RQ155) followed by the observatory code and reference code for the source of the astrometry.

2013 09  01.10003  20 18 06.680  -56 53 19.20  23.5i 13RQ155   W84  C~52RK      
2013 09  06.13916  20 17 35.809  -56 51 32.87  23.1r 13RQ155   W84  C~52RK      
2013 09  13.00730  20 16 58.705  -56 48 33.46  23.0z 13RQ155   W84  C~52RK      
2015 09  13.03693  20 38 04.691  -56 44 49.65  23.2i 13RQ155   W84  C~52RK      
2015 09  13.03832  20 38 04.679  -56 44 49.69  23.5r 13RQ155   W84  C~52RK      
2015 09  13.03969  20 38 04.684  -56 44 49.68  24.0g 13RQ155   W84  C~52RK      
2016 09  08.18591  20 49 11.656  -56 39 07.04  24.5g 13RQ155   W84  C~52RK      
2016 09  21.99687  20 47 54.166  -56 33 06.76  22.9i 13RQ155   W84  C~52RK      
2016 09  22.04395  20 47 53.946  -56 33 05.29  23.2r 13RQ155   W84  C~52RK      
2016 09  22.04532  20 47 53.936  -56 33 05.10  23.9g 13RQ155   W84  C~52RK      
2017 10  13.02989  20 57 22.935  -56 09 04.17  24.3r 13RQ155   W84  C~52RK      
2018 10  28.10794  21 07 43.586  -55 42 49.23  22.5i 13RQ155   W84  C~52RK      
2018 11  07.04733  21 07 53.227  -55 33 24.59  23.5r 13RQ155   W84  C~52RK      

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     0.02       0.00    -0.07
     2   0.0138      0.00     0.14       0.00    -0.05
     3   0.0326      0.00    -0.19       0.00     0.13
     4   2.0313      0.00     0.14       0.00     0.01
     5   2.0313      0.00     0.08       0.00    -0.07
     6   2.0313      0.00     0.27       0.00    -0.09
     7   3.0201      0.00    -0.15       0.00    -0.06
     8   3.0579      0.00    -0.19       0.00     0.04
     9   3.0580      0.00    -0.06       0.00     0.01
    10   3.0580      0.00    -0.11       0.00     0.16
    11   4.1148      0.00     0.05       0.00     0.07
    12   5.1554      0.00     0.07       0.00    -0.14
    13   5.1826      0.00     0.02       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.

13RQ155    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        51.303    51.303    51.304
ecceobj         0.316     0.316     0.316
incobj         38.587    38.587    38.587
qmin           34.022    33.986    33.954
qmax           69.193    69.432    69.281
amean          51.259    51.320    51.249
amin           50.759    50.845    50.728
amax           51.880    51.943    51.875
emean           0.313     0.314     0.313
emin            0.294     0.295     0.290
emax            0.335     0.337     0.336
imean          37.629    37.594    37.621
imin           37.094    37.069    37.062
imax           38.080    38.095    38.173
excite_mean     0.686     0.686     0.686
fracstop        1.000     1.000     1.000
cjmean          2.550     2.550     2.550

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       194.2     190.1     189.2
kozaiamp        180.0     180.0     180.0