Orbit Fit and Astrometric record for 13SX112

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: 13SX112   
# Created Sat Nov 27 02:12:07 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     13 observations of     13
# Arc:   5.11y
# First observation: 2013/09/30
#  Last observation: 2018/11/08
# Chi-squared of fit:     6.00 DOF:     20 RMS:  0.12
# Min/Max residuals:    -0.25    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.757903E-05  2.817639E-02 -5.101588E-07 -9.370874E-04  2.560610E-02  3.285347E-03
# Covariance matrix:
  4.5146E-13 -1.5536E-13 -5.3626E-16  2.5679E-15  2.3642E-13 -5.7719E-13
 -1.5536E-13  3.6626E-13  5.8785E-15 -1.2079E-14  2.3232E-13  2.6332E-12
 -5.3626E-16  5.8785E-15  3.2231E-13 -7.9828E-14  6.1053E-15  4.6247E-14
  2.5679E-15 -1.2079E-14 -7.9828E-14  3.1107E-14 -8.7691E-15 -9.4800E-14
  2.3642E-13  2.3232E-13  6.1053E-15 -8.7691E-15  9.0471E-13  1.8670E-12
 -5.7719E-13  2.6332E-12  4.6247E-14 -9.4800E-14  1.8670E-12  2.0665E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.620303    1.083767   -0.099677    0.010888   -0.996611  2456565.633408
# Heliocentric elements and errors
Epoch:              2456566.5000  =  2013/10/01
Mean Anomaly:           18.27174 +/-     0.020
Argument of Peri:      130.11147 +/-     0.038
Long of Asc Node:      198.86434 +/-     0.002
Inclination:             1.99584 +/-     0.000
Eccentricity:         0.26960833 +/-    0.0001
Semi-Major Axis:     53.03718591 +/-    0.0107
Time of Perihelion: 2449405.9476 +/-       8.1
Perihelion:          38.73791900 +/-    0.0111
Aphelion:            67.33645281 +/-    0.0157
Period (y)              386.2593 +/-      0.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.03809822 +/-    0.0015
Ecliptic Y            0.86025792 +/-    0.0000
Ecliptic Z            0.42275643 +/-    0.0000
Ecliptic XDOT         0.00028913 +/-    0.0000
Ecliptic YDOT         0.00301747 +/-    0.0000
Ecliptic ZDOT        -0.00009625 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.04949093 +/-    0.0015
Geocenter to KBO     39.05315295 +/-    0.0015
# Hcoef:  7.87

The following table shows the complete astrometric record for 13SX112. 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 (13SX112) followed by the observatory code and reference code for the source of the astrometry.

2013 09  30.13263  00 02 59.428  +01 00 00.73  24.5r 13SX112   W84  C~52RV      
2013 09  30.13409  00 02 59.422  +01 00 00.63  23.6i 13SX112   W84  C~52RV      
2013 11  22.06260  23 59 55.308  +00 39 03.53  24.1r 13SX112   W84  C~52RV      
2013 11  23.08855  23 59 53.529  +00 38 50.78  24.4r 13SX112   W84  C~52RV      
2015 11  07.07312  00 12 23.963  +01 53 33.28  24.1r 13SX112   W84  C~52RV      
2015 11  07.07451  00 12 23.971  +01 53 33.25  23.5i 13SX112   W84  C~52RV      
2016 09  10.32547  00 22 16.489  +02 54 41.90  23.2r 13SX112   W84  C~52RV      
2016 12  05.08896  00 17 12.594  +02 20 41.55  23.5r 13SX112   W84  C~52RV      
2017 10  22.17055  00 25 04.695  +03 08 51.90  23.9r 13SX112   W84  C~52RV      
2017 10  22.17332  00 25 04.704  +03 08 51.59  24.2g 13SX112   W84  C~52RV      
2018 09  09.32722  00 34 03.142  +04 03 26.30  24.1i 13SX112   W84  C~52RV      
2018 11  07.13052  00 29 53.899  +03 36 09.91  23.7r 13SX112   W84  C~52RV      
2018 11  08.13743  00 29 50.502  +03 35 47.18  24.0g 13SX112   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    -0.03       0.00    -0.03
     2   0.0000      0.00    -0.02       0.00    -0.08
     3   0.1449      0.00     0.04       0.00    -0.06
     4   0.1477      0.00    -0.04       0.00     0.23
     5   2.1025      0.00    -0.02       0.00    -0.06
     6   2.1025      0.00     0.17       0.00    -0.06
     7   2.9465      0.00     0.04       0.00     0.03
     8   3.1813      0.00    -0.04       0.00    -0.01
     9   4.0603      0.00    -0.21       0.00     0.18
    10   4.0603      0.00     0.10       0.00    -0.06
    11   4.9424      0.00     0.05       0.00    -0.03
    12   5.1033      0.00    -0.25       0.00    -0.13
    13   5.1061      0.00     0.26       0.00     0.11

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.

13SX112    quality flag:3

Type:        7:3EEEE   7:3EEEE   7:3EEEE

axisobj        53.464    53.464    53.464
ecceobj         0.276     0.276     0.276
incobj          1.993     1.993     1.993
qmin           38.169    38.172    38.165
qmax           68.777    68.779    68.779
amean          52.969    52.969    52.969
amin           52.321    52.320    52.323
amax           53.744    53.747    53.745
emean           0.268     0.268     0.268
emin            0.256     0.256     0.256
emax            0.280     0.280     0.280
imean           2.689     2.690     2.689
imin            2.521     2.521     2.521
imax            2.842     2.841     2.843
excite_mean     0.272     0.272     0.272
fracstop        1.000     1.000     1.000
cjmean          3.121     3.121     3.121

libcent 0       178.6     178.5     178.9
libamp  0       128.5     128.5     128.8
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       222.3     221.9     222.7
kozaiamp        179.9     180.0     180.0