Orbit Fit and Astrometric record for 16CD289

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: 16CD289   
# Created Wed Dec  8 02:13:48 2021
# Orbit generated from Bernstein formalism
# Fitting      8 observations of      8
# Arc:   1.22y
# First observation: 2016/02/05
#  Last observation: 2017/04/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000006   0.009038  -0.000004  -0.004700   0.015236   0.000000
# Chi-squared of fit:     1.56 DOF:     10 RMS:  0.08
# Min/Max residuals:    -0.16    0.19
# Exact a, adot, b, bdot, g, gdot:
  9.245258E-06  9.055831E-03 -4.771135E-06 -4.797483E-03  1.532984E-02  3.198956E-03
# Covariance matrix:
  4.6614E-13  8.2857E-14  2.8537E-14 -1.7103E-13  7.2397E-13  3.0322E-11
  8.2857E-14  1.0435E-11 -1.0931E-12  2.3684E-11 -1.9647E-12 -2.7165E-09
  2.8537E-14 -1.0931E-12  4.2002E-13 -3.2848E-12  5.1060E-13  3.5162E-10
 -1.7103E-13  2.3684E-11 -3.2848E-12  6.3986E-11 -9.1161E-12 -7.3128E-09
  7.2397E-13 -1.9647E-12  5.1060E-13 -9.1161E-12  3.8465E-12  1.0922E-09
  3.0322E-11 -2.7165E-09  3.5162E-10 -7.3128E-09  1.0922E-09  8.4608E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
   13.678229  136.616070    0.019039    0.232919   -0.956253  2457423.843909
# Heliocentric elements and errors
Epoch:              2457420.5000  =  2016/02/02
Mean Anomaly:          104.22534 +/-    11.920
Argument of Peri:       16.07223 +/-     8.239
Long of Asc Node:      340.49818 +/-     0.028
Inclination:            30.60882 +/-     0.028
Eccentricity:         0.34063460 +/-    0.0463
Semi-Major Axis:     56.31910104 +/-    1.9911
Time of Perihelion: 2412726.1300 +/-    4528.6
Perihelion:          37.13486649 +/-    2.9211
Aphelion:            75.50333559 +/-    3.7329
Period (y)              422.6606 +/-     22.41
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -46.77057281 +/-    0.0059
Ecliptic Y           44.22405378 +/-    0.0056
Ecliptic Z           15.42507842 +/-    0.0020
Ecliptic XDOT        -0.00166208 +/-    0.0001
Ecliptic YDOT        -0.00066193 +/-    0.0001
Ecliptic ZDOT        -0.00069740 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   66.19053148 +/-    0.0056
Geocenter to KBO     65.23227061 +/-    0.0083
# Hcoef:  7.27

The following table shows the complete astrometric record for 16CD289. 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 (16CD289) followed by the observatory code and reference code for the source of the astrometry.

2016 02  05.34312  09 34 53.750  +28 50 40.10  25.5r 16CD289   568  C~2ZtI      
2016 02  05.48400  09 34 53.229  +28 50 42.19  25.3r 16CD289   568  C~2ZtI      
2016 02  05.59331  09 34 52.823  +28 50 43.79  25.4r 16CD289   568  C~2ZtI      
2016 03  10.14258  09 32 54.345  +28 56 06.26        16CD289   304  C~2ZtI      
2016 03  10.19069  09 32 54.190  +28 56 06.42        16CD289   304  C~2ZtI      
2016 04  10.25221  09 31 36.588  +28 55 23.08  25.2r 16CD289   568  C~2ZtI      
2017 04  25.01050  09 33 07.567  +28 27 44.57  25.5r 16CD289   304  C~2ZtI      
2017 04  26.03188  09 33 06.750  +28 27 32.50  25.6r 16CD289   304  C~2ZtI      

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    -0.04
     2   0.0004     -7.15     0.02      -0.29     0.04
     3   0.0007    -12.72    -0.01      -0.54     0.10
     4   0.0925  -1588.42    -0.03    -206.35    -0.12
     5   0.0927  -1590.40    -0.01    -206.86    -0.16
     6   0.1777  -2539.97     0.01    -578.76     0.19
     7   1.2174   -868.68     0.03   -1758.19     0.04
     8   1.2202   -874.93    -0.03   -1773.12    -0.05

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.

16CD289    quality flag:1

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        56.371    66.091    53.074
ecceobj         0.347     0.499     0.256
incobj         30.762    30.841    30.683
qmin           35.172    30.991    37.347
qmax           78.380   102.914    69.545
amean          56.212    66.045    53.101
amin           55.576    65.052    52.545
amax           57.065    67.361    53.725
emean           0.354     0.514     0.271
emin            0.334     0.490     0.248
emax            0.374     0.531     0.295
imean          31.337    30.705    31.187
imin           30.758    30.007    30.648
imax           31.913    31.942    31.833
excite_mean     0.629     0.725     0.584
fracstop        1.000     1.000     1.000
cjmean          2.718     2.640     2.753

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       162.0     180.2     157.7
kozaiamp        180.0     140.3     180.0