Orbit Fit and Astrometric record for 16SO56

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: 16SO56    
# Created Thu Dec  9 02:13:56 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     24 observations of     24
# Arc:   5.08y
# First observation: 2013/11/03
#  Last observation: 2018/12/01
# Chi-squared of fit:    10.51 DOF:     42 RMS:  0.12
# Min/Max residuals:    -0.21    0.31
# Exact a, adot, b, bdot, g, gdot:
  1.624230E-05  2.491390E-02 -3.174618E-06 -4.816205E-03  2.382598E-02  6.567491E-03
# Covariance matrix:
  4.4427E-13 -2.6797E-13 -2.5449E-14  3.3734E-14 -8.2778E-14 -1.5329E-12
 -2.6797E-13  3.1297E-13  4.1310E-14 -5.3371E-14  1.6665E-14  2.4538E-12
 -2.5449E-14  4.1310E-14  3.2597E-13 -1.0172E-13  7.4978E-16  3.6379E-13
  3.3734E-14 -5.3371E-14 -1.0172E-13  4.4549E-14 -4.9398E-15 -4.6996E-13
 -8.2778E-14  1.6665E-14  7.4978E-16 -4.9398E-15  3.3708E-13  1.4350E-13
 -1.5329E-12  2.4538E-12  3.6379E-13 -4.6996E-13  1.4350E-13  2.1608E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -12.413046   31.391707   -0.156796   -0.210218   -0.955674  2456599.587878
# Heliocentric elements and errors
Epoch:              2456600.5000  =  2013/11/04
Mean Anomaly:           23.32895 +/-     0.011
Argument of Peri:      174.52808 +/-     0.017
Long of Asc Node:      164.35460 +/-     0.001
Inclination:            16.31586 +/-     0.000
Eccentricity:         0.39609558 +/-    0.0002
Semi-Major Axis:     62.79963358 +/-    0.0182
Time of Perihelion: 2444821.0012 +/-       7.5
Perihelion:          37.92497634 +/-    0.0179
Aphelion:            87.67429082 +/-    0.0291
Period (y)              497.6728 +/-      0.22
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.74262295 +/-    0.0008
Ecliptic Y           21.99754744 +/-    0.0005
Ecliptic Z           -9.02215874 +/-    0.0002
Ecliptic XDOT        -0.00096980 +/-    0.0000
Ecliptic YDOT         0.00276410 +/-    0.0000
Ecliptic ZDOT        -0.00070258 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.92797272 +/-    0.0008
Geocenter to KBO     41.97084239 +/-    0.0010
# Hcoef:  7.31

The following table shows the complete astrometric record for 16SO56. 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 (16SO56) followed by the observatory code and reference code for the source of the astrometry.

2013 11  03.08710  02 14 05.07   +00 17 38.8   23.9r 16SO56    W84  C~55Zw      
2013 11  03.14978  02 14 04.78   +00 17 37.3         16SO56    W84  C~55Zw      
2013 11  03.21823  02 14 04.48   +00 17 35.7         16SO56    W84  C~55Zw      
2014 10  29.27817  02 20 09.852  +00 33 03.13  23.5i 16SO56    W84  C~55Zw      
2015 12  15.15949  02 22 45.763  +00 34 45.78  23.4i 16SO56    W84  C~55Zw      
2016 09  09.40569  02 34 16.122  +01 22 29.22  23.1i 16SO56    W84  C~55Zx      
2016 09  10.36303  02 34 13.968  +01 22 01.93  23.6r 16SO56    W84  C~55Zx      
2016 09  27.45294  02 33 25.33   +01 13 41.1   24.6g 16SO56    568  C~2eAI      
2016 09  27.62188  02 33 24.75   +01 13 36.1   24.5g 16SO56    568  C~2eAI      
2016 09  28.46202  02 33 21.91   +01 13 11.2   24.5g 16SO56    568  C~2eAI      
2016 09  28.52267  02 33 21.70   +01 13 09.3   24.5g 16SO56    568  C~2eAI      
2016 09  28.58192  02 33 21.49   +01 13 07.6   24.4g 16SO56    568  C~2eAI      
2016 09  29.47382  02 33 18.42   +01 12 41.1   24.5g 16SO56    568  C~2eAI      
2016 09  29.53424  02 33 18.21   +01 12 39.3   24.4g 16SO56    568  C~2eAI      
2016 09  29.59403  02 33 18.00   +01 12 37.5   24.6g 16SO56    568  C~2eAI      
2016 11  04.18347  02 30 52.334  +00 56 34.39  23.6r 16SO56    W84  C~55Zx      
2016 11  04.20137  02 30 52.261  +00 56 33.70  23.5i 16SO56    W84  C~55Zx      
2016 11  04.20412  02 30 52.229  +00 56 33.87  23.6r 16SO56    W84  C~55Zx      
2016 11  10.16829  02 30 26.256  +00 54 26.57  23.1z 16SO56    W84  C~55Zx      
2016 11  25.12200  02 29 24.035  +00 50 15.35  22.6z 16SO56    W84  C~55Zx      
2017 09  18.32393  02 39 19.999  +01 30 47.18  23.4i 16SO56    W84  C~55Zx      
2018 10  28.26554  02 42 16.685  +01 24 40.91  22.3z 16SO56    W84  C~55Zx      
2018 12  01.08313  02 39 54.195  +01 14 25.50  23.5r 16SO56    W84  C~55Zx      
2018 12  01.08452  02 39 54.195  +01 14 25.40  24.5g 16SO56    W84  C~55Zx      

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     0.06       0.00     0.02
     2   0.0002      0.00    -0.10       0.00    -0.03
     3   0.0004      0.00    -0.01       0.00    -0.04
     4   0.9861      0.00     0.01       0.00     0.05
     5   2.1138      0.00     0.15       0.00    -0.04
     6   2.8510      0.00     0.18       0.00     0.07
     7   2.8536      0.00     0.05       0.00    -0.06
     8   2.9004      0.00    -0.17       0.00     0.06
     9   2.9008      0.00    -0.14       0.00     0.08
    10   2.9031      0.00    -0.09       0.00     0.14
    11   2.9033      0.00    -0.06       0.00     0.04
    12   2.9035      0.00    -0.09       0.00     0.11
    13   2.9059      0.00    -0.10       0.00     0.09
    14   2.9061      0.00    -0.03       0.00     0.08
    15   2.9062      0.00     0.01       0.00     0.06
    16   3.0037      0.00     0.10       0.00     0.09
    17   3.0037      0.00     0.20       0.00    -0.20
    18   3.0037      0.00    -0.10       0.00     0.03
    19   3.0201      0.00     0.05       0.00    -0.19
    20   3.0610      0.00     0.12       0.00    -0.18
    21   3.8747      0.00     0.13       0.00    -0.20
    22   4.9834      0.00     0.31       0.00     0.06
    23   5.0760      0.00    -0.21       0.00     0.06
    24   5.0760      0.00    -0.13       0.00    -0.03

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.

16SO56    quality flag:3

Type:          3:1EE     3:1EE     3:1EE

axisobj        63.458    63.458    63.457
ecceobj         0.403     0.403     0.403
incobj         16.279    16.279    16.279
qmin           35.538    35.536    35.539
qmax           91.024    91.017    91.031
amean          62.631    62.631    62.631
amin           61.876    61.873    61.880
amax           63.605    63.601    63.610
emean           0.412     0.412     0.412
emin            0.387     0.387     0.387
emax            0.431     0.431     0.431
imean          13.849    13.846    13.852
imin           12.722    12.718    12.726
imax           15.566    15.566    15.566
excite_mean     0.477     0.477     0.477
fracstop        1.000     1.000     1.000
cjmean          3.032     3.032     3.032

libcent 0        74.4      74.4      74.4
libamp  0        15.0      15.1      14.9
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        92.4      92.5      92.4
kozaiamp         76.2      76.2      76.3