Orbit Fit and Astrometric record for 16SR105

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: 16SR105   
# Created Wed Dec  8 02:14:01 2021
# Orbit generated from Bernstein formalism
# Fitting     10 observations of     10
# Arc:   4.23y
# First observation: 2013/10/13
#  Last observation: 2018/01/05
Preliminary a, adot, b, bdot, g, gdot:
  -0.000817   0.032374  -0.000001  -0.000827   0.031905   0.000000
# Chi-squared of fit:     5.31 DOF:     14 RMS:  0.13
# Min/Max residuals:    -0.23    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.602754E-05  3.006733E-02 -4.808216E-08 -7.503403E-04  2.970515E-02 -1.905882E-02
# Covariance matrix:
  1.4669E-12 -8.8387E-13  4.4850E-15  8.3788E-15 -4.3164E-13 -4.1073E-12
 -8.8387E-13  1.2860E-12 -2.1738E-14 -5.7814E-15  7.1134E-13  9.2443E-12
  4.4850E-15 -2.1738E-14  1.1858E-12 -3.2352E-13  1.8642E-14 -2.5850E-13
  8.3788E-15 -5.7814E-15 -3.2352E-13  1.0015E-13 -3.4247E-14  4.1831E-14
 -4.3164E-13  7.1134E-13  1.8642E-14 -3.4247E-14  9.4418E-13  4.0751E-12
 -4.1073E-12  9.2443E-12 -2.5850E-13  4.1831E-14  4.0751E-12  7.6074E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -19.239720   28.930560    0.159375   -0.324317   -0.929617  2456578.748628
# Heliocentric elements and errors
Epoch:              2456570.5000  =  2013/10/05
Mean Anomaly:          326.58946 +/-     0.025
Argument of Peri:        6.85772 +/-     0.007
Long of Asc Node:      122.44687 +/-     0.002
Inclination:            18.74000 +/-     0.000
Eccentricity:         0.58374680 +/-    0.0003
Semi-Major Axis:     46.92423144 +/-    0.0227
Time of Perihelion: 2467466.7039 +/-       2.4
Perihelion:          19.53236153 +/-    0.0157
Aphelion:            74.31610136 +/-    0.0381
Period (y)              321.4430 +/-      0.23
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.75560119 +/-    0.0009
Ecliptic Y           15.71518039 +/-    0.0005
Ecliptic Z          -11.09311452 +/-    0.0004
Ecliptic XDOT        -0.00281822 +/-    0.0000
Ecliptic YDOT         0.00161063 +/-    0.0000
Ecliptic ZDOT         0.00051368 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.59636808 +/-    0.0008
Geocenter to KBO     33.66420194 +/-    0.0011
# Hcoef:  8.24

The following table shows the complete astrometric record for 16SR105. 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 (16SR105) followed by the observatory code and reference code for the source of the astrometry.

2013 10  13.24785  02 14 36.803  -06 55 47.18  23.3i 16SR105   W84  C~52Zw      
2016 09  22.39683  02 37 05.166  -04 52 54.75  23.0z 16SR105   W84  C~52Zw      
2016 10  22.20611  02 34 32.942  -05 12 24.74  22.6i 16SR105   W84  C~52Zw      
2016 11  03.19439  02 33 21.836  -05 18 22.02  23.4r 16SR105   W84  C~52Zw      
2016 12  31.11584  02 28 47.846  -05 20 30.02  23.8r 16SR105   W84  C~52Zw      
2016 12  31.11720  02 28 47.848  -05 20 30.27  23.1i 16SR105   W84  C~52Zw      
2017 11  29.16175  02 38 17.363  -04 45 59.54  22.5z 16SR105   W84  C~52Zw      
2017 12  25.09006  02 36 21.699  -04 43 41.50  23.8r 16SR105   W84  C~52Zw      
2018 01  05.07378  02 35 51.947  -04 39 44.22  23.3r 16SR105   W84  C~52Zw      
2018 01  05.07516  02 35 51.947  -04 39 44.06  23.7i 16SR105   W84  C~52Zw      

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    -0.00       0.00    -0.07
     2   2.9436  21501.02    -0.08    -266.25    -0.06
     3   3.0252  18933.45    -0.07    -540.79     0.19
     4   3.0580  17805.00     0.27    -492.55     0.26
     5   3.2166  13915.15    -0.05     856.28     0.06
     6   3.2166  13915.09    -0.07     856.03    -0.23
     7   4.1284  22670.52     0.18    -267.88     0.04
     8   4.1994  21089.66    -0.05     487.75    -0.02
     9   4.2295  20756.62    -0.10     871.00    -0.13
    10   4.2295  20756.68    -0.02     871.15    -0.04

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.

16SR105    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        47.047    47.104    46.990
ecceobj         0.582     0.582     0.581
incobj         18.736    18.736    18.736
qmin           19.237    19.196    19.257
qmax           76.725    78.909    75.619
amean          46.911    47.699    46.283
amin           45.214    46.732    45.229
amax           48.232    49.270    47.577
emean           0.583     0.591     0.577
emin            0.568     0.582     0.565
emax            0.594     0.605     0.589
imean          17.271    17.199    17.322
imin           17.101    16.949    17.130
imax           17.592    17.429    17.521
excite_mean     0.654     0.661     0.649
fracstop        0.007     0.007     0.006
cjmean          2.581     2.574     2.586

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        12.8      13.0      11.9
kozaiamp          6.4       5.7       5.3