Orbit Fit and Astrometric record for 16SX105

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: 16SX105   
# Created Sat Dec  4 02:13:57 2021
# Orbit generated from Bernstein formalism
# Fitting     11 observations of     11
# Arc:   3.83y
# First observation: 2014/12/23
#  Last observation: 2018/10/20
Preliminary a, adot, b, bdot, g, gdot:
  -0.000989   0.033170  -0.000193   0.011327   0.029829   0.000000
# Chi-squared of fit:     2.20 DOF:     16 RMS:  0.08
# Min/Max residuals:    -0.17    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.790077E-05  3.237571E-02  6.651375E-06  1.107293E-02  2.846957E-02 -2.790186E-03
# Covariance matrix:
  1.2341E-12 -8.6987E-13  7.2698E-14 -1.7313E-13 -4.0744E-13 -4.4592E-12
 -8.6987E-13  9.5500E-13 -1.2150E-13  2.3798E-13  3.0740E-13  6.1915E-12
  7.2698E-14 -1.2150E-13  7.3399E-13 -2.9726E-13 -9.1002E-15 -9.0562E-13
 -1.7313E-13  2.3798E-13 -2.9726E-13  1.8605E-13  8.8462E-14  1.7610E-12
 -4.0744E-13  3.0740E-13 -9.1002E-15  8.8462E-14  5.3664E-13  2.1979E-12
 -4.4592E-12  6.1915E-12 -9.0562E-13  1.7610E-12  2.1979E-12  4.5834E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -31.043023   17.212782   -0.942639   -0.143176   -0.238272  2457014.590808
# Heliocentric elements and errors
Epoch:              2457010.5000  =  2014/12/19
Mean Anomaly:          352.91339 +/-     0.024
Argument of Peri:      313.42443 +/-     0.048
Long of Asc Node:       73.95061 +/-     0.001
Inclination:            36.05952 +/-     0.000
Eccentricity:         0.30458295 +/-    0.0001
Semi-Major Axis:     50.52133315 +/-    0.0079
Time of Perihelion: 2459592.4422 +/-       8.8
Perihelion:          35.13339663 +/-    0.0076
Aphelion:            65.90926966 +/-    0.0116
Period (y)              359.1041 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.73044465 +/-    0.0007
Ecliptic Y            9.88984849 +/-    0.0003
Ecliptic Z          -18.11329851 +/-    0.0005
Ecliptic XDOT        -0.00062045 +/-    0.0000
Ecliptic YDOT         0.00306333 +/-    0.0000
Ecliptic ZDOT         0.00105082 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.37427223 +/-    0.0006
Geocenter to KBO     35.12522722 +/-    0.0009
# Hcoef:  7.71

The following table shows the complete astrometric record for 16SX105. 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 (16SX105) followed by the observatory code and reference code for the source of the astrometry.

2014 12  23.09003  01 52 33.874  -21 51 21.88  24.6g 16SX105   W84  C~55a1      
2015 11  05.17893  02 02 18.470  -20 47 17.71  23.4g 16SX105   W84  C~55a1      
2016 09  23.24248  02 12 19.698  -19 05 30.92  23.5r 16SX105   W84  C~55a1      
2016 09  24.23140  02 12 15.057  -19 06 11.28  23.2g 16SX105   W84  C~55a1      
2017 01  30.04610  02 04 23.480  -18 31 28.23  22.9i 16SX105   W84  C~55a1      
2017 01  30.04748  02 04 23.484  -18 31 28.06  22.7r 16SX105   W84  C~55a1      
2017 12  07.19677  02 11 36.544  -17 54 24.45  23.0i 16SX105   W84  C~55a1      
2017 12  10.13624  02 11 24.388  -17 53 03.69  23.0r 16SX105   W84  C~55a1      
2017 12  12.12688  02 11 16.561  -17 52 04.22  23.9g 16SX105   W84  C~55a1      
2017 12  22.10507  02 10 42.800  -17 46 05.87  22.7i 16SX105   W84  C~55a1      
2018 10  20.32428  02 21 54.586  -16 29 03.48  23.5i 16SX105   W84  C~55a1      

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    -0.10
     2   0.8681   9033.10    -0.07      92.80     0.17
     3   1.7526  19364.31     0.04    1965.16     0.08
     4   1.7553  19286.82    -0.01    1957.51    -0.17
     5   2.1053  14111.99     0.02    6737.27    -0.05
     6   2.1053  14112.11     0.07    6737.40     0.01
     7   2.9572  20688.04    -0.07    6094.84    -0.07
     8   2.9652  20565.87     0.02    6243.71     0.10
     9   2.9707  20490.47    -0.07    6346.32    -0.01
    10   2.9980  20209.72     0.02    6881.15     0.12
    11   3.8254  31063.86     0.02    6807.82    -0.10

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.

16SX105    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        51.140    51.163    51.117
ecceobj         0.313     0.313     0.312
incobj         36.061    36.061    36.061
qmin           34.073    34.031    34.051
qmax           68.053    68.174    68.032
amean          50.706    50.737    50.681
amin           50.233    50.250    50.175
amax           51.290    51.355    51.290
emean           0.305     0.305     0.305
emin            0.286     0.286     0.285
emax            0.327     0.328     0.327
imean          34.744    34.746    34.744
imin           34.230    34.217    34.235
imax           35.330    35.351    35.331
excite_mean     0.647     0.647     0.646
fracstop        1.000     1.000     1.000
cjmean          2.625     2.625     2.625

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       171.2     171.2     171.1
kozaiamp        180.0     180.0     180.0