Orbit Fit and Astrometric record for 16UO273

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: 16UO273   
# Created Tue Nov 30 02:14:02 2021
# Orbit generated from Bernstein formalism
# Fitting     12 observations of     12
# Arc:   4.05y
# First observation: 2014/10/01
#  Last observation: 2018/10/21
Preliminary a, adot, b, bdot, g, gdot:
  -0.000031   0.024239   0.000020   0.005260   0.024004   0.000000
# Chi-squared of fit:     5.65 DOF:     18 RMS:  0.12
# Min/Max residuals:    -0.22    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.549922E-05  2.452884E-02  3.907412E-06  5.331239E-03  2.455922E-02  4.163275E-03
# Covariance matrix:
  7.0162E-13 -4.6989E-13  2.6244E-14 -6.0858E-14  1.4032E-14 -3.2086E-12
 -4.6989E-13  9.9817E-13 -9.9689E-14  2.0863E-13  7.6704E-13  1.0928E-11
  2.6244E-14 -9.9689E-14  5.5007E-13 -2.1212E-13 -9.8460E-14 -1.2038E-12
 -6.0858E-14  2.0863E-13 -2.1212E-13  1.3420E-13  1.8659E-13  2.5072E-12
  1.4032E-14  7.6704E-13 -9.8460E-14  1.8659E-13  1.4662E-12  9.7051E-12
 -3.2086E-12  1.0928E-11 -1.2038E-12  2.5072E-12  9.7051E-12  1.3128E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -10.886480   28.727624    0.358567   -0.176844   -0.920407  2456931.846398
# Heliocentric elements and errors
Epoch:              2456930.5000  =  2014/09/30
Mean Anomaly:           40.92286 +/-     0.039
Argument of Peri:      258.98341 +/-     0.082
Long of Asc Node:       68.97088 +/-     0.002
Inclination:            16.06283 +/-     0.001
Eccentricity:         0.20058429 +/-    0.0004
Semi-Major Axis:     47.84739237 +/-    0.0103
Time of Perihelion: 2443188.5214 +/-      12.3
Perihelion:          38.24995697 +/-    0.0217
Aphelion:            57.44482778 +/-    0.0236
Period (y)              330.9753 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           36.05502491 +/-    0.0017
Ecliptic Y           19.35662316 +/-    0.0009
Ecliptic Z           -7.69002009 +/-    0.0004
Ecliptic XDOT        -0.00082082 +/-    0.0000
Ecliptic YDOT         0.00266627 +/-    0.0000
Ecliptic ZDOT         0.00049608 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.63868503 +/-    0.0016
Geocenter to KBO     40.71789816 +/-    0.0020
# Hcoef:  7.32

The following table shows the complete astrometric record for 16UO273. 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 (16UO273) followed by the observatory code and reference code for the source of the astrometry.

2014 10  01.34562  02 02 10.993  +00 49 44.81  23.7r 16UO273   W84  C~55b1      
2014 10  01.34698  02 02 10.982  +00 49 44.80  23.3i 16UO273   W84  C~55b1      
2015 12  17.12233  02 01 43.106  +01 16 53.14  22.9i 16UO273   W84  C~55b1      
2016 10  28.23296  02 09 43.971  +02 11 11.01  23.8r 16UO273   W84  C~55b1      
2016 10  28.23436  02 09 43.970  +02 11 10.86  23.7i 16UO273   W84  C~55b1      
2016 11  03.22984  02 09 15.907  +02 09 11.25  23.4r 16UO273   W84  C~55b1      
2017 08  27.41367  02 18 14.718  +03 20 27.21  23.1i 16UO273   W84  C~55b1      
2017 09  18.33522  02 17 18.505  +03 12 32.08  23.7r 16UO273   W84  C~55b1      
2017 09  25.30996  02 16 53.809  +03 09 44.19  24.2r 16UO273   W84  C~55b1      
2017 09  25.34372  02 16 53.704  +03 09 43.18  23.5i 16UO273   W84  C~55b1      
2017 10  22.22461  02 14 58.522  +02 59 00.47  22.6z 16UO273   W84  C~55b1      
2018 10  21.23239  02 19 47.623  +03 44 35.36  22.6z 16UO273   W84  C~55b1      

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    -0.10
     2   0.0000     -0.16    -0.00       0.05    -0.05
     3   1.2095    176.12    -0.08    1671.97     0.28
     4   2.0750   8073.64     0.08    2213.96     0.07
     5   2.0750   8073.57     0.11    2213.82    -0.07
     6   2.0914   7636.95    -0.16    2248.04    -0.06
     7   2.9050  16726.70     0.01    3459.99    -0.06
     8   2.9651  15766.23    -0.14    3304.92    -0.06
     9   2.9842  15358.72    -0.19    3275.35     0.08
    10   2.9843  15356.89     0.08    3274.94    -0.22
    11   3.0578  13506.56     0.19    3269.67     0.18
    12   4.0544  18547.22     0.04    4342.00    -0.00

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.

16UO273    quality flag:3

Type:           2:1E      2:1E      2:1E
Type:         2:1EII                    

axisobj        48.351    48.383    48.318
ecceobj         0.208     0.209     0.207
incobj         16.052    16.052    16.052
qmin           36.508    37.229    36.988
qmax           60.004    59.057    59.194
amean          47.796    47.795    47.797
amin           47.236    47.228    47.283
amax           48.447    48.451    48.434
emean           0.203     0.198     0.172
emin            0.151     0.175     0.103
emax            0.239     0.219     0.224
imean          14.844    14.811    16.070
imin           13.775    14.274    14.381
imax           16.848    15.348    17.469
excite_mean     0.327     0.324     0.328
fracstop        1.000     1.000     1.000
cjmean          3.014     3.018     3.014

libcent 0        99.6     180.5     100.6
libamp  0        67.7     150.7      59.1
libcent 1       221.1    -180.0    -180.0
libamp  1       117.6    -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       238.8     195.7     193.2
kozaiamp         31.2     180.0     180.0