Orbit Fit and Astrometric record for 13SL112

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: 13SL112   
# Created Fri Dec  3 02:12:01 2021
# Orbit generated from Bernstein formalism
# Fitting     16 observations of     16
# Arc:   3.91y
# First observation: 2013/09/29
#  Last observation: 2017/08/28
Preliminary a, adot, b, bdot, g, gdot:
   0.000025   0.033377  -0.000003  -0.000178   0.030938   0.000000
# Chi-squared of fit:     8.31 DOF:     26 RMS:  0.13
# Min/Max residuals:    -0.30    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.714781E-05  3.311164E-02 -1.509237E-07 -1.746140E-04  3.037976E-02 -2.743756E-03
# Covariance matrix:
  2.7642E-13 -1.0974E-13 -5.3650E-16  2.6355E-17  8.9824E-14 -2.5955E-13
 -1.0974E-13  5.2733E-13 -1.3922E-15 -2.1963E-15  4.4866E-13  4.1953E-12
 -5.3650E-16 -1.3922E-15  2.3453E-13 -7.6229E-14 -3.2111E-15 -1.2467E-14
  2.6355E-17 -2.1963E-15 -7.6229E-14  4.0609E-14 -2.4051E-15 -1.9023E-14
  8.9824E-14  4.4866E-13 -3.2111E-15 -2.4051E-15  7.8157E-13  3.9564E-12
 -2.5955E-13  4.1953E-12 -1.2467E-14 -1.9023E-14  3.9564E-12  3.6183E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.131789    7.886806    0.034603   -0.037142   -1.000643  2456564.729018
# Heliocentric elements and errors
Epoch:              2456560.5000  =  2013/09/25
Mean Anomaly:          292.82867 +/-     0.031
Argument of Peri:      338.76982 +/-     0.041
Long of Asc Node:      106.10284 +/-     0.009
Inclination:             2.09064 +/-     0.000
Eccentricity:         0.08995559 +/-    0.0002
Semi-Major Axis:     34.88412855 +/-    0.0039
Time of Perihelion: 2470602.2650 +/-       6.1
Perihelion:          31.74610612 +/-    0.0075
Aphelion:            38.02215099 +/-    0.0079
Period (y)              206.0393 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.57885643 +/-    0.0009
Ecliptic Y            4.61971069 +/-    0.0001
Ecliptic Z           -1.22446980 +/-    0.0000
Ecliptic XDOT        -0.00066097 +/-    0.0000
Ecliptic YDOT         0.00292052 +/-    0.0000
Ecliptic ZDOT        -0.00000639 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.91726186 +/-    0.0009
Geocenter to KBO     32.91665687 +/-    0.0010
# Hcoef:  8.14

The following table shows the complete astrometric record for 13SL112. 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 (13SL112) followed by the observatory code and reference code for the source of the astrometry.

2013 09  29.22824  00 32 20.266  +01 10 11.22  23.9r 13SL112   W84  C~52RU      
2013 09  29.22965  00 32 20.232  +01 10 11.29  23.0i 13SL112   W84  C~52RU      
2013 10  13.11779  00 31 05.041  +01 02 12.25  22.9z 13SL112   W84  C~52RU      
2013 11  08.17535  00 29 00.339  +00 49 35.94  24.1r 13SL112   W84  C~52RU      
2013 11  08.17673  00 29 00.339  +00 49 36.06  23.5i 13SL112   W84  C~52RU      
2014 08  18.31436  00 42 37.979  +02 16 45.97  22.4i 13SL112   W84  C~52RU      
2014 11  14.13129  00 35 34.818  +01 31 29.27  23.8i 13SL112   W84  C~52RU      
2014 11  17.05870  00 35 24.173  +01 30 29.57  22.9z 13SL112   W84  C~52RU      
2016 09  09.28468  00 55 10.499  +03 34 32.76  23.1i 13SL112   W84  C~52RU      
2016 11  05.19246  00 50 12.080  +03 03 21.74  23.3r 13SL112   W84  C~52RU      
2016 11  05.19385  00 50 12.065  +03 03 21.68  22.7i 13SL112   W84  C~52RU      
2016 11  05.19523  00 50 12.045  +03 03 21.82  24.0g 13SL112   W84  C~52RU      
2016 11  18.09093  00 49 17.747  +02 58 12.48  23.1i 13SL112   W84  C~52RU      
2016 11  25.07037  00 48 53.746  +02 56 03.22  23.4r 13SL112   W84  C~52RU      
2017 08  28.28539  01 03 09.632  +04 24 46.80  23.3i 13SL112   W84  C~52RU      
2017 08  28.28676  01 03 09.610  +04 24 46.78  23.3r 13SL112   W84  C~52RU      

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     0.01
     2   0.0000     -0.44    -0.30       0.27     0.28
     3   0.0380  -1225.64     0.13       4.47     0.04
     4   0.1094  -3242.86     0.06      46.81    -0.10
     5   0.1094  -3242.81     0.20      46.92     0.01
     6   0.8846  10094.17     0.07      27.69    -0.12
     7   1.1250   3185.28    -0.17      25.36    -0.05
     8   1.1330   3015.01    -0.13      33.34    -0.18
     9   2.9461  22373.29     0.10     -94.10    -0.02
    10   3.1019  17483.25     0.21     -69.25    -0.09
    11   3.1019  17483.02     0.09     -69.21    -0.06
    12   3.1019  17482.80    -0.03     -68.97     0.18
    13   3.1372  16607.33     0.01     -35.02    -0.07
    14   3.1563  16223.48    -0.16     -13.06     0.07
    15   3.9125  30278.11     0.06    -108.57    -0.02
    16   3.9125  30277.79    -0.17    -108.46     0.09

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.

13SL112    quality flag:3

Type:           5:4E      5:4E      5:4E

axisobj        35.042    35.052    35.032
ecceobj         0.089     0.090     0.089
incobj          2.091     2.091     2.091
qmin           31.259    31.328    31.286
qmax           39.097    39.056    39.069
amean          34.946    34.946    34.945
amin           34.542    34.547    34.536
amax           35.380    35.361    35.370
emean           0.084     0.084     0.084
emin            0.061     0.063     0.062
emax            0.106     0.105     0.106
imean           1.371     1.391     1.392
imin            0.189     0.200     0.189
imax            2.183     2.218     2.171
excite_mean     0.088     0.088     0.088
fracstop        1.000     1.000     1.000
cjmean          3.008     3.008     3.008

libcent 0       180.2     181.1     179.4
libamp  0       109.4     106.0     111.8
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       180.2     184.5     179.9
kozaiamp        179.9     180.0     180.0