Orbit Fit and Astrometric record for 13RA158

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: 13RA158   
# Created Sat Dec  4 02:11:57 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     15 observations of     15
# Arc:   5.02y
# First observation: 2013/09/11
#  Last observation: 2018/09/17
# Chi-squared of fit:     5.47 DOF:     24 RMS:  0.11
# Min/Max residuals:    -0.34    0.15
# Exact a, adot, b, bdot, g, gdot:
  1.655993E-05  2.459881E-02 -3.992432E-06 -8.440583E-03  2.520923E-02  3.425925E-03
# Covariance matrix:
  4.0696E-13 -5.4163E-14 -1.3366E-15 -2.5340E-15  3.1370E-13  6.3364E-14
 -5.4163E-14  2.3393E-13  2.6035E-14 -7.9842E-14  1.2534E-13  2.2461E-12
 -1.3366E-15  2.6035E-14  1.9605E-13 -6.7009E-14  1.3954E-14  2.9294E-13
 -2.5340E-15 -7.9842E-14 -6.7009E-14  6.6474E-14 -5.2454E-14 -8.9948E-13
  3.1370E-13  1.2534E-13  1.3954E-14 -5.2454E-14  5.3354E-13  1.4640E-12
  6.3364E-14  2.2461E-12  2.9294E-13 -8.9948E-13  1.4640E-12  2.5302E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.479619    3.980469    0.270531   -0.024960   -0.970167  2456546.805188
# Heliocentric elements and errors
Epoch:              2456546.5000  =  2013/09/11
Mean Anomaly:           39.97189 +/-     0.028
Argument of Peri:      130.10464 +/-     0.047
Long of Asc Node:      179.40240 +/-     0.000
Inclination:            18.99526 +/-     0.000
Eccentricity:         0.16608942 +/-    0.0002
Semi-Major Axis:     45.83858226 +/-    0.0063
Time of Perihelion: 2443960.2217 +/-       9.1
Perihelion:          38.22527867 +/-    0.0099
Aphelion:            53.45188585 +/-    0.0112
Period (y)              310.3523 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.54570606 +/-    0.0011
Ecliptic Y            2.55330694 +/-    0.0001
Ecliptic Z           -1.02446232 +/-    0.0000
Ecliptic XDOT         0.00015581 +/-    0.0000
Ecliptic YDOT         0.00268812 +/-    0.0000
Ecliptic ZDOT        -0.00092585 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.63885736 +/-    0.0011
Geocenter to KBO     39.66795770 +/-    0.0011
# Hcoef:  7.55

The following table shows the complete astrometric record for 13RA158. 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 (13RA158) followed by the observatory code and reference code for the source of the astrometry.

2013 09  11.30441  00 16 57.660  +00 13 27.00  23.8g 13RA158   W84  C~52RP      
2013 10  13.11063  00 14 37.232  -00 04 26.80  23.8i 13RA158   W84  C~52RP      
2013 11  08.16530  00 12 59.669  -00 16 40.78  23.4r 13RA158   W84  C~52RP      
2013 11  08.16667  00 12 59.674  -00 16 40.81  23.1i 13RA158   W84  C~52RP      
2013 11  22.08973  00 12 24.228  -00 21 14.26  23.8g 13RA158   W84  C~52RP      
2013 11  22.09111  00 12 24.227  -00 21 14.38  23.5r 13RA158   W84  C~52RP      
2013 11  22.09392  00 12 24.215  -00 21 14.44  23.4i 13RA158   W84  C~52RP      
2014 08  18.30786  00 24 23.090  +00 32 44.54  23.1i 13RA158   W84  C~52RP      
2014 10  02.24991  00 21 21.575  +00 08 35.90  23.7r 13RA158   W84  C~52RP      
2016 10  02.18440  00 33 03.088  +00 21 55.61  23.6i 13RA158   W84  C~52RP      
2016 11  25.05802  00 29 45.850  -00 01 37.39  23.7i 13RA158   W84  C~52RP      
2016 11  25.05939  00 29 45.850  -00 01 37.50  23.6r 13RA158   W84  C~52RP      
2016 11  25.06077  00 29 45.838  -00 01 37.69  24.6g 13RA158   W84  C~52RP      
2017 10  20.20247  00 37 33.120  +00 19 05.68  24.3g 13RA158   W84  C~52RP      
2018 09  17.31441  00 45 43.877  +00 43 50.81  23.6r 13RA158   W84  C~52RP      

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    -0.11       0.00    -0.34
     2   0.0871      0.00    -0.11       0.00     0.08
     3   0.1584      0.00    -0.09       0.00     0.02
     4   0.1584      0.00     0.05       0.00     0.02
     5   0.1965      0.00     0.05       0.00     0.13
     6   0.1965      0.00     0.08       0.00     0.03
     7   0.1965      0.00    -0.02       0.00     0.01
     8   0.9336      0.00     0.11       0.00     0.12
     9   1.0567      0.00     0.12       0.00    -0.02
    10   3.0579      0.00     0.06       0.00    -0.08
    11   3.2053      0.00     0.02       0.00     0.15
    12   3.2054      0.00     0.06       0.00     0.06
    13   3.2054      0.00    -0.07       0.00    -0.11
    14   4.1065      0.00    -0.20       0.00    -0.06
    15   5.0158      0.00     0.10       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.

13RA158    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        46.116    46.116    46.116
ecceobj         0.171     0.171     0.171
incobj         18.943    18.943    18.943
qmin           37.547    37.523    37.530
qmax           54.595    54.569    54.573
amean          45.877    45.878    45.877
amin           45.491    45.489    45.493
amax           46.317    46.314    46.309
emean           0.165     0.165     0.165
emin            0.151     0.152     0.151
emax            0.179     0.179     0.179
imean          18.818    18.816    18.817
imin           18.477    18.475    18.475
imax           19.273    19.268    19.270
excite_mean     0.362     0.362     0.362
fracstop        1.000     1.000     1.000
cjmean          2.962     2.962     2.962

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       184.8     184.8     184.9
kozaiamp        180.0     179.9     180.0