Orbit Fit and Astrometric record for 13SO112

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: 13SO112   
# Created Wed Dec 25 02:09:36 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     12 observations of     12
# Arc:   8.91y
# First observation: 2013/09/30
#  Last observation: 2022/08/27
# Chi-squared of fit:     3.11 DOF:     18 RMS:  0.09
# Min/Max residuals:    -0.17    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.261517E-05  1.665115E-02 -6.594932E-06 -7.333381E-03  2.087118E-02  5.821133E-03
# Covariance matrix:
  3.9680E-13 -6.1127E-14  1.5200E-14 -7.6001E-15  5.1091E-13  1.0611E-13
 -6.1127E-14  1.1292E-13  3.6496E-14 -4.9114E-14  2.0263E-13  7.9172E-13
  1.5200E-14  3.6496E-14  2.6567E-13 -5.6348E-14  1.6845E-13  3.3394E-13
 -7.6001E-15 -4.9114E-14 -5.6348E-14  3.6671E-14 -1.7579E-13 -4.2181E-13
  5.1091E-13  2.0263E-13  1.6845E-13 -1.7579E-13  2.6238E-12  2.7688E-12
  1.0611E-13  7.9172E-13  3.3394E-13 -4.2181E-13  2.7688E-12  6.7645E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    5.902182  -16.143809   -0.389613    0.094982   -0.917871  2456565.584788
# Heliocentric elements and errors
Epoch:              2456566.5000  =  2013/10/01
Mean Anomaly:           66.23307 +/-     0.029
Argument of Peri:       63.48924 +/-     0.037
Long of Asc Node:      177.17023 +/-     0.000
Inclination:            24.50949 +/-     0.000
Eccentricity:         0.31235137 +/-    0.0001
Semi-Major Axis:     50.47111021 +/-    0.0135
Time of Perihelion: 2432471.0477 +/-      14.3
Perihelion:          34.70638997 +/-    0.0110
Aphelion:            66.23583046 +/-    0.0187
Period (y)              358.5688 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           46.77412037 +/-    0.0035
Ecliptic Y          -13.13084531 +/-    0.0010
Ecliptic Z            4.92658155 +/-    0.0004
Ecliptic XDOT         0.00142579 +/-    0.0000
Ecliptic YDOT         0.00185811 +/-    0.0000
Ecliptic ZDOT        -0.00087822 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   48.83121633 +/-    0.0034
Geocenter to KBO     47.91278684 +/-    0.0037
# Hcoef:  6.92

The following table shows the complete astrometric record for 13SO112. 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 (13SO112) followed by the observatory code and reference code for the source of the astrometry.

2013 09  30.08401  22 51 26.615  -00 53 52.35  23.3i 13SO112   W84  C~52RU      
2013 10  10.10644  22 50 54.486  -00 58 36.39  24.0r 13SO112   W84  C~52RU      
2013 10  11.09940  22 50 51.538  -00 59 03.73  23.5z 13SO112   W84  C~52RU      
2013 10  12.07240  22 50 48.706  -00 59 30.36  23.5i 13SO112   W84  C~52RU      
2013 11  23.06502  22 49 41.846  -01 14 08.96  24.0r 13SO112   W84  C~52RU      
2016 09  26.12252  23 03 55.539  -00 56 22.81  23.6i 13SO112   W84  C~52RU      
2017 09  27.13996  23 07 52.555  -00 58 07.70  23.7r 13SO112   W84  C~52RU      
2017 11  15.04649  23 05 51.466  -01 17 25.64  24.1r 13SO112   W84  C~52RU      
2017 11  15.04786  23 05 51.463  -01 17 25.68  23.6i 13SO112   W84  C~52RU      
2022 08  27.255490 23 29 08.618  -00 49 57.63  23.8G 13SO112   G37  C~5nHc      
2022 08  27.302240 23 29 08.459  -00 49 58.86        13SO112   G37  C~5nHc      
2022 08  27.349320 23 29 08.287  -00 49 59.93        13SO112   G37  C~5nHc      

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    -0.08       0.00     0.20
     2   0.0274      0.00     0.04       0.00     0.02
     3   0.0302      0.00    -0.02       0.00    -0.03
     4   0.0328      0.00     0.06       0.00    -0.09
     5   0.1478      0.00    -0.00       0.00     0.13
     6   2.9898      0.00     0.14       0.00    -0.17
     7   3.9919      0.00    -0.15       0.00    -0.11
     8   4.1258      0.00     0.04       0.00    -0.04
     9   4.1258      0.00     0.01       0.00    -0.06
    10   8.9067      0.00    -0.03       0.00     0.03
    11   8.9068      0.00     0.05       0.00    -0.01
    12   8.9070      0.00    -0.04       0.00     0.12

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.

13SO112    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        50.712    50.713    50.712
ecceobj         0.312     0.312     0.312
incobj         24.437    24.437    24.437
qmin           33.910    33.943    33.993
qmax           68.191    68.055    68.111
amean          50.660    50.654    50.667
amin           50.146    50.142    50.159
amax           51.306    51.313    51.306
emean           0.309     0.308     0.310
emin            0.288     0.285     0.288
emax            0.330     0.329     0.329
imean          24.371    24.423    24.284
imin           23.591    23.615    23.633
imax           25.047    25.071    25.024
excite_mean     0.515     0.515     0.515
fracstop        1.000     1.000     1.000
cjmean          2.841     2.841     2.842

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       171.6     171.8     173.6
kozaiamp        180.0     180.0     180.0