Orbit Fit and Astrometric record for 16XO34

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: 16XO34    
# Created Sat Dec  4 02:13:59 2021
# Orbit generated from Bernstein formalism
# Fitting     10 observations of     10
# Arc:   3.96y
# First observation: 2014/12/13
#  Last observation: 2018/11/28
Preliminary a, adot, b, bdot, g, gdot:
  -0.000160   0.022338   0.000056  -0.012611   0.025420   0.000000
# Chi-squared of fit:     4.14 DOF:     14 RMS:  0.11
# Min/Max residuals:    -0.24    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.427367E-05  2.227927E-02 -8.310402E-06 -1.253325E-02  2.465869E-02 -8.527354E-05
# Covariance matrix:
  1.3514E-12 -8.3370E-13 -1.4118E-13  2.5571E-13 -3.4691E-13 -5.4207E-12
 -8.3370E-13  1.0252E-12  2.6717E-13 -4.8330E-13  5.1888E-13  1.0204E-11
 -1.4118E-13  2.6717E-13  1.1820E-12 -5.2350E-13  1.6894E-13  3.1213E-12
  2.5571E-13 -4.8330E-13 -5.2350E-13  4.1520E-13 -3.0765E-13 -5.6488E-12
 -3.4691E-13  5.1888E-13  1.6894E-13 -3.0765E-13  7.8742E-13  6.6329E-12
 -5.4207E-12  1.0204E-11  3.1213E-12 -5.6488E-12  6.6329E-12  1.1944E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -19.579298   22.686681   -0.834229   -0.174708   -0.491790  2457004.647348
# Heliocentric elements and errors
Epoch:              2457000.5000  =  2014/12/09
Mean Anomaly:            4.48441 +/-     0.183
Argument of Peri:      210.15866 +/-     0.234
Long of Asc Node:      173.09119 +/-     0.001
Inclination:            34.39155 +/-     0.001
Eccentricity:         0.11658625 +/-    0.0001
Semi-Major Axis:     46.44583375 +/-    0.0064
Time of Perihelion: 2455560.3055 +/-      58.9
Perihelion:          41.03088835 +/-    0.0076
Aphelion:            51.86077916 +/-    0.0088
Period (y)              316.5398 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.40916143 +/-    0.0013
Ecliptic Y           15.70922714 +/-    0.0005
Ecliptic Z          -13.59036429 +/-    0.0005
Ecliptic XDOT        -0.00139665 +/-    0.0000
Ecliptic YDOT         0.00209385 +/-    0.0000
Ecliptic ZDOT        -0.00130783 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.05224150 +/-    0.0011
Geocenter to KBO     40.55365722 +/-    0.0015
# Hcoef:  7.65

The following table shows the complete astrometric record for 16XO34. 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 (16XO34) followed by the observatory code and reference code for the source of the astrometry.

2014 12  13.14657  01 52 55.367  -09 22 33.06  23.9i 16XO34    W84  C~55bY      
2016 12  06.08429  02 05 01.330  -09 45 17.10  23.3z 16XO34    W84  C~55bY      
2016 12  31.08714  02 04 02.721  -09 41 36.25  23.7r 16XO34    W84  C~55bY      
2017 08  21.40018  02 17 33.186  -09 00 10.19  23.4r 16XO34    W84  C~55bY      
2017 10  16.24533  02 14 37.616  -09 39 34.51  24.0r 16XO34    W84  C~55bY      
2017 10  18.28531  02 14 28.278  -09 40 45.51  24.0i 16XO34    W84  C~55bY      
2017 10  18.28669  02 14 28.289  -09 40 45.88  23.6r 16XO34    W84  C~55bY      
2018 01  09.09472  02 09 44.275  -09 49 14.62  23.8r 16XO34    W84  C~55bY      
2018 01  09.09609  02 09 44.260  -09 49 14.62  23.5i 16XO34    W84  C~55bY      
2018 11  28.19236  02 17 20.499  -10 05 43.79  23.8r 16XO34    W84  C~55bY      

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     0.06
     2   1.9820   9445.77    -0.02   -5306.41    -0.02
     3   2.0505   8726.15     0.09   -4771.82    -0.08
     4   2.6893  20829.91    -0.16   -7099.60    -0.14
     5   2.8422  17489.59    -0.00   -8274.33    -0.03
     6   2.8477  17333.59     0.08   -8286.26     0.25
     7   2.8477  17333.60     0.19   -8286.67    -0.15
     8   3.0745  13235.60    -0.03   -7129.95     0.01
     9   3.0745  13235.39    -0.24   -7129.87     0.06
    10   3.9591  19119.59     0.08  -10671.51     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.

16XO34    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        46.837    46.856    46.817
ecceobj         0.124     0.124     0.124
incobj         34.266    34.266    34.266
qmin           40.147    40.158    40.140
qmax           53.143    53.174    53.134
amean          46.512    46.532    46.493
amin           46.145    46.153    46.123
amax           46.915    46.950    46.892
emean           0.120     0.120     0.120
emin            0.108     0.108     0.107
emax            0.133     0.134     0.133
imean          33.753    33.753    33.753
imin           33.508    33.516    33.530
imax           34.018    34.005    34.005
excite_mean     0.568     0.568     0.568
fracstop        1.000     1.000     1.000
cjmean          2.699     2.699     2.699

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       196.3     196.2     196.0
kozaiamp        180.0     180.0     179.9