Orbit Fit and Astrometric record for 16SD106

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: 16SD106   
# Created Sat Dec  4 02:13:58 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     18 observations of     18
# Arc:   5.02y
# First observation: 2013/09/08
#  Last observation: 2018/09/17
# Chi-squared of fit:     9.99 DOF:     30 RMS:  0.13
# Min/Max residuals:    -0.34    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.895225E-05  2.594068E-02 -9.338677E-07 -1.278395E-03  2.171033E-02 -7.997740E-03
# Covariance matrix:
  5.0884E-13 -1.7374E-13 -1.6632E-15  4.4317E-15  1.7234E-13 -6.2760E-13
 -1.7374E-13  3.5216E-13  1.1108E-14 -1.5540E-14  4.8232E-13  2.4449E-12
 -1.6632E-15  1.1108E-14  4.1217E-13 -1.0454E-13  1.9364E-14  8.4170E-14
  4.4317E-15 -1.5540E-14 -1.0454E-13  3.3592E-14 -1.9948E-14 -1.2016E-13
  1.7234E-13  4.8232E-13  1.9364E-14 -1.9948E-14  1.6705E-12  3.3748E-12
 -6.2760E-13  2.4449E-12  8.4170E-14 -1.2016E-13  3.3748E-12  1.8826E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.965782  -14.258469    0.006935    0.069824   -1.005988  2456543.659468
# Heliocentric elements and errors
Epoch:              2456544.5000  =  2013/09/09
Mean Anomaly:          358.79801 +/-     0.006
Argument of Peri:      163.03378 +/-     0.015
Long of Asc Node:      219.49436 +/-     0.004
Inclination:             4.80796 +/-     0.000
Eccentricity:         0.87958393 +/-    0.0004
Semi-Major Axis:    354.24725128 +/-    1.0826
Time of Perihelion: 2464675.7209 +/-   11126.1
Perihelion:          42.65706234 +/-    0.1843
Aphelion:           665.83744022 +/-    2.0389
Period (y)             6667.5754 +/-     30.56
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           45.51077247 +/-    0.0026
Ecliptic Y          -11.56927757 +/-    0.0007
Ecliptic Z            3.18556486 +/-    0.0002
Ecliptic XDOT        -0.00016483 +/-    0.0000
Ecliptic YDOT         0.00341448 +/-    0.0000
Ecliptic ZDOT        -0.00023045 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   47.06646092 +/-    0.0026
Geocenter to KBO     46.06133070 +/-    0.0027
# Hcoef:  6.58

The following table shows the complete astrometric record for 16SD106. 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 (16SD106) followed by the observatory code and reference code for the source of the astrometry.

2013 09  08.15869  23 01 21.482  -01 57 52.73  23.8g 16SD106   W84  C~55a2      
2013 09  10.28438  23 01 13.437  -01 58 45.46  24.3g 16SD106   W84  C~55a2      
2013 10  13.04541  22 59 20.578  -02 11 57.06  23.0z 16SD106   W84  C~55a2      
2016 09  26.128877 23 17 22.01   -00 32 23.3   23.1r 16SD106   W84  C~55a2      
2016 09  26.130266 23 17 21.99   -00 32 23.1   22.7i 16SD106   W84  C~55a2      
2016 09  26.131632 23 17 21.99   -00 32 23.2   23.4g 16SD106   W84  C~55a2      
2016 09  30.121053 23 17 07.48   -00 34 05.8   22.7z 16SD106   W84  C~55a2      
2016 10  05.114965 23 16 49.94   -00 36 11.7   23.1i 16SD106   W84  C~55a2      
2016 10  05.116343 23 16 49.92   -00 36 12.0   23.2r 16SD106   W84  C~55a2      
2016 10  05.117720 23 16 49.92   -00 36 12.0   23.2g 16SD106   W84  C~55a2      
2016 11  05.028009 23 15 26.60   -00 47 16.1   22.5z 16SD106   W84  C~55a2      
2017 09  27.14683  23 23 11.981  -00 00 42.38  22.5z 16SD106   W84  C~55a2      
2017 11  08.06415  23 21 11.048  -00 16 23.57  24.1g 16SD106   W84  C~55a2      
2017 11  08.06551  23 21 11.042  -00 16 23.58  23.5r 16SD106   W84  C~55a2      
2017 11  08.06689  23 21 11.036  -00 16 23.50  23.1i 16SD106   W84  C~55a2      
2018 09  11.25354  23 30 12.264  +00 38 49.51  22.8i 16SD106   W84  C~55a2      
2018 09  17.27443  23 29 48.904  +00 36 13.65  23.3r 16SD106   W84  C~55a2      
2018 09  17.27580  23 29 48.903  +00 36 13.56  23.4g 16SD106   W84  C~55a2      

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    -0.01       0.00    -0.00
     2   0.0058      0.00     0.06       0.00    -0.34
     3   0.0955      0.00     0.00       0.00     0.25
     4   3.0499      0.00     0.18       0.00    -0.13
     5   3.0499      0.00    -0.04       0.00     0.10
     6   3.0499      0.00     0.04       0.00     0.04
     7   3.0608      0.00     0.08       0.00    -0.14
     8   3.0745      0.00     0.07       0.00     0.19
     9   3.0745      0.00    -0.16       0.00    -0.07
    10   3.0745      0.00    -0.08       0.00    -0.04
    11   3.1591      0.00    -0.27       0.00     0.33
    12   4.0520      0.00     0.16       0.00     0.13
    13   4.1668      0.00     0.08       0.00    -0.07
    14   4.1668      0.00     0.02       0.00    -0.06
    15   4.1668      0.00    -0.03       0.00     0.05
    16   5.0078      0.00     0.01       0.00    -0.09
    17   5.0243      0.00    -0.05       0.00    -0.02
    18   5.0243      0.00     0.02       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.

16SD106    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       375.956   375.934   375.979
ecceobj         0.886     0.886     0.886
incobj          4.806     4.806     4.806
qmin           39.114    39.203    39.247
qmax          787.704   767.818   749.596
amean         367.933   356.237   357.844
amin          332.599   331.043   335.113
amax          415.197   405.264   396.155
emean           0.884     0.880     0.880
emin            0.868     0.867     0.868
emax            0.897     0.895     0.892
imean           5.687     5.686     5.632
imin            5.427     5.436     5.422
imax            5.969     5.989     5.859
excite_mean     0.889     0.885     0.886
fracstop        1.000     1.000     1.000
cjmean          3.336     3.336     3.336

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       174.6     174.9     171.7
kozaiamp         11.1      12.4       8.0