Orbit Fit and Astrometric record for 13RR155

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: 13RR155   
# Created Sat Nov 27 02:11:55 2021
# Orbit generated from Bernstein formalism
# Fitting     11 observations of     11
# Arc:   4.12y
# First observation: 2013/09/01
#  Last observation: 2017/10/16
Preliminary a, adot, b, bdot, g, gdot:
   0.000245   0.020371   0.000063   0.005070   0.022197   0.000000
# Chi-squared of fit:     1.75 DOF:     16 RMS:  0.07
# Min/Max residuals:    -0.10    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.516773E-05  2.100981E-02  3.735142E-06  5.325382E-03  2.189125E-02  6.543082E-03
# Covariance matrix:
  4.1815E-13 -2.2902E-13 -2.4987E-14 -1.5514E-13  1.2953E-12 -3.1936E-12
 -2.2902E-13  7.0152E-13 -8.5731E-14  2.0451E-13  3.7433E-13  8.4247E-12
 -2.4987E-14 -8.5731E-14  2.6255E-13 -7.2540E-14 -4.7910E-13 -7.5220E-13
 -1.5514E-13  2.0451E-13 -7.2540E-14  2.0510E-13 -8.9710E-13  3.5808E-12
  1.2953E-12  3.7433E-13 -4.7910E-13 -8.9710E-13  1.3360E-11 -6.5836E-12
 -3.1936E-12  8.4247E-12 -7.5220E-13  3.5808E-12 -6.5836E-12  1.2091E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -31.748556  -60.311321   -0.632267   -0.414649   -0.670232  2456536.516268
# Heliocentric elements and errors
Epoch:              2456530.5000  =  2013/08/26
Mean Anomaly:           32.72320 +/-     0.064
Argument of Peri:      223.06262 +/-     0.068
Long of Asc Node:        3.90327 +/-     0.002
Inclination:            34.16957 +/-     0.000
Eccentricity:         0.38622657 +/-    0.0007
Semi-Major Axis:     61.83987379 +/-    0.0753
Time of Perihelion: 2440384.8843 +/-      12.0
Perihelion:          37.95567115 +/-    0.0645
Aphelion:            85.72407644 +/-    0.1136
Period (y)              486.3076 +/-      0.89
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           20.17945118 +/-    0.0032
Ecliptic Y          -34.11455815 +/-    0.0056
Ecliptic Z          -24.03650424 +/-    0.0040
Ecliptic XDOT         0.00279473 +/-    0.0000
Ecliptic YDOT         0.00039137 +/-    0.0000
Ecliptic ZDOT         0.00013591 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.35479332 +/-    0.0048
Geocenter to KBO     45.68035100 +/-    0.0076
# Hcoef:  6.76

The following table shows the complete astrometric record for 13RR155. 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 (13RR155) followed by the observatory code and reference code for the source of the astrometry.

2013 09  01.01549  20 47 49.647  -50 57 09.36  23.8g 13RR155   W84  C~52RK      
2013 09  04.10242  20 47 32.328  -50 56 26.82  23.4g 13RR155   W84  C~52RK      
2013 09  08.03890  20 47 11.252  -50 55 22.08  24.2g 13RR155   W84  C~52RK      
2013 09  13.03901  20 46 46.370  -50 53 42.63  22.5z 13RR155   W84  C~52RK      
2013 09  29.00474  20 45 43.277  -50 46 27.06  23.3r 13RR155   W84  C~52RK      
2014 09  12.04803  20 53 22.133  -50 14 08.24  24.0r 13RR155   W84  C~52RK      
2014 09  12.04939  20 53 22.124  -50 14 08.05  23.3i 13RR155   W84  C~52RK      
2015 09  12.03517  20 59 37.362  -49 33 23.21  23.9r 13RR155   W84  C~52RK      
2015 09  12.03653  20 59 37.354  -49 33 23.22  24.4g 13RR155   W84  C~52RK      
2017 10  10.04692  21 09 33.800  -47 58 22.22  23.3r 13RR155   W84  C~52RK      
2017 10  16.09762  21 09 21.597  -47 54 51.06  23.5r 13RR155   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     0.00       0.00     0.02
     2   0.0085   -142.21     0.22      91.52     0.01
     3   0.0192   -311.41    -0.05     215.06    -0.10
     4   0.0329   -504.32    -0.05     382.57    -0.00
     5   0.0766   -939.05    -0.06     980.92    -0.03
     6   1.0295   3828.30    -0.06    1425.87    -0.07
     7   1.0295   3828.28    -0.03    1426.08     0.09
     8   2.0288   8073.54     0.01    2492.26     0.09
     9   2.0288   8073.46    -0.01    2492.28     0.06
    10   4.1069  15674.50     0.06    5655.36    -0.01
    11   4.1234  15641.39    -0.04    5898.13    -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.

13RR155    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        61.860    62.097    61.623
ecceobj         0.385     0.387     0.383
incobj         34.160    34.161    34.159
qmin           36.709    36.363    36.804
qmax           88.847    90.942    88.312
amean          62.160    62.686    61.951
amin           61.464    61.614    61.238
amax           63.087    63.940    62.910
emean           0.389     0.395     0.388
emin            0.368     0.364     0.368
emax            0.408     0.422     0.405
imean          34.479    34.465    34.466
imin           33.954    33.727    34.006
imax           35.242    35.499    35.147
excite_mean     0.687     0.690     0.686
fracstop        1.000     1.000     1.000
cjmean          2.666     2.666     2.666

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       176.5     187.9     177.8
kozaiamp        180.0     179.7     180.0