Orbit Fit and Astrometric record for 13SF113

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: 13SF113   
# Created Sat Nov 27 02:12:07 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     11 observations of     11
# Arc:   5.16y
# First observation: 2013/09/30
#  Last observation: 2018/11/27
# Chi-squared of fit:     3.71 DOF:     16 RMS:  0.10
# Min/Max residuals:    -0.21    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.578829E-05  2.483724E-02  2.483614E-07  1.050025E-03  2.529431E-02 -9.106516E-04
# Covariance matrix:
  2.7558E-13 -1.8877E-13  3.6794E-15 -6.5432E-15 -1.2132E-13 -1.0783E-12
 -1.8877E-13  4.7477E-13 -1.5624E-14  3.6720E-14  1.0881E-13  3.7165E-12
  3.6794E-15 -1.5624E-14  2.2964E-13 -5.9848E-14  7.2865E-15 -1.3548E-13
 -6.5432E-15  3.6720E-14 -5.9848E-14  4.0669E-14 -4.1378E-14  3.2583E-13
 -1.2132E-13  1.0881E-13  7.2865E-15 -4.1378E-14  1.0521E-12  6.0648E-13
 -1.0783E-12  3.7165E-12 -1.3548E-13  3.2583E-13  6.0648E-13  3.1512E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -38.178748  -39.054030   -0.719454   -0.430670   -0.547870  2456565.698028
# Heliocentric elements and errors
Epoch:              2456566.5000  =  2013/10/01
Mean Anomaly:          223.43082 +/-     0.334
Argument of Peri:       52.92764 +/-     0.329
Long of Asc Node:       47.02196 +/-     0.001
Inclination:            37.67289 +/-     0.000
Eccentricity:         0.02886434 +/-    0.0002
Semi-Major Axis:     39.25194115 +/-    0.0061
Time of Perihelion: 2490641.8502 +/-      84.3
Perihelion:          38.11895965 +/-    0.0095
Aphelion:            40.38492265 +/-    0.0097
Period (y)              245.9234 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           25.12780958 +/-    0.0010
Ecliptic Y          -19.45797900 +/-    0.0008
Ecliptic Z          -24.43700993 +/-    0.0010
Ecliptic XDOT         0.00168204 +/-    0.0000
Ecliptic YDOT         0.00209089 +/-    0.0000
Ecliptic ZDOT         0.00015041 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.08975142 +/-    0.0009
Geocenter to KBO     39.53465348 +/-    0.0016
# Hcoef:  7.58

The following table shows the complete astrometric record for 13SF113. 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 (13SF113) followed by the observatory code and reference code for the source of the astrometry.

2013 09  30.19725  22 44 33.383  -49 49 43.75  23.4r 13SF113   W84  C~52RV      
2013 09  30.19871  22 44 33.388  -49 49 43.70  23.3i 13SF113   W84  C~52RV      
2013 10  04.06884  22 44 09.536  -49 48 42.94  23.9r 13SF113   W84  C~52RV      
2013 10  04.07587  22 44 09.498  -49 48 42.99  23.6i 13SF113   W84  C~52RV      
2013 10  28.07804  22 42 13.425  -49 36 28.02  23.7r 13SF113   W84  C~52RV      
2014 08  18.24686  22 57 01.954  -48 55 57.33  23.9i 13SF113   W84  C~52RV      
2014 08  22.23057  22 56 34.550  -48 58 06.39  23.9r 13SF113   W84  C~52RV      
2016 10  20.07239  23 04 19.908  -47 23 33.48  23.3r 13SF113   W84  C~52RV      
2016 10  20.07929  23 04 19.884  -47 23 33.03  22.5i 13SF113   W84  C~52RV      
2018 09  15.25215  23 21 22.138  -45 46 25.79  24.0r 13SF113   W84  C~52RV      
2018 11  27.03588  23 15 50.719  -45 15 43.12  24.0g 13SF113   W84  C~52RV      

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    -0.14       0.00     0.05
     2   0.0000      0.00     0.08       0.00     0.08
     3   0.0106      0.00     0.05       0.00     0.14
     4   0.0106      0.00     0.13       0.00    -0.03
     5   0.0763      0.00    -0.10       0.00    -0.08
     6   0.8817      0.00    -0.04       0.00    -0.21
     7   0.8926      0.00     0.04       0.00    -0.00
     8   3.0551      0.00    -0.03       0.00    -0.05
     9   3.0551      0.00     0.12       0.00     0.19
    10   4.9584      0.00     0.03       0.00    -0.13
    11   5.1577      0.00    -0.06       0.00     0.08

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.

13SF113    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.391    39.391    39.391
ecceobj         0.026     0.026     0.026
incobj         37.702    37.702    37.702
qmin           34.968    34.961    34.815
qmax           44.163    44.112    44.346
amean          39.459    39.459    39.458
amin           39.089    39.099    39.092
amax           39.828    39.821    39.830
emean           0.061     0.059     0.070
emin            0.001     0.001     0.002
emax            0.111     0.110     0.115
imean          36.705    36.709    36.655
imin           36.280    36.252    36.255
imax           37.083    37.089    37.019
excite_mean     0.601     0.601     0.601
fracstop        1.000     1.000     1.000
cjmean          2.595     2.595     2.596

libcent 0       163.5     185.4     180.7
libamp  0       136.6     172.5     101.2
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       172.3     167.2     186.3
kozaiamp        180.0     180.0     180.0