Orbit Fit and Astrometric record for 16PN219

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: 16PN219   
# Created Tue Dec  7 02:13:58 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     17 observations of     17
# Arc:   5.21y
# First observation: 2013/09/11
#  Last observation: 2018/11/26
# Chi-squared of fit:     3.56 DOF:     28 RMS:  0.08
# Min/Max residuals:    -0.20    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.385754E-05  1.981107E-02  1.871970E-06  2.918518E-03  2.249944E-02 -2.585096E-03
# Covariance matrix:
  1.4335E-12 -7.4240E-13  7.9974E-14 -7.7237E-14 -4.7956E-13 -4.5755E-12
 -7.4240E-13  5.6355E-13 -7.6593E-14  7.4164E-14  4.3452E-13  4.4165E-12
  7.9974E-14 -7.6593E-14  8.9687E-13 -2.2775E-13 -7.4388E-14 -6.6235E-13
 -7.7237E-14  7.4164E-14 -2.2775E-13  6.9460E-14  6.3854E-14  6.4860E-13
 -4.7956E-13  4.3452E-13 -7.4388E-14  6.3854E-14  1.4791E-12  2.8192E-12
 -4.5755E-12  4.4165E-12 -6.6235E-13  6.4860E-13  2.8192E-12  3.9497E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    9.293054  -28.567958   -0.292135    0.155799   -0.951582  2456546.685928
# Heliocentric elements and errors
Epoch:              2456546.5000  =  2013/09/11
Mean Anomaly:          245.48278 +/-     0.099
Argument of Peri:      176.36440 +/-     0.081
Long of Asc Node:      284.58918 +/-     0.003
Inclination:            12.30637 +/-     0.000
Eccentricity:         0.14550239 +/-    0.0002
Semi-Major Axis:     42.17966026 +/-    0.0079
Time of Perihelion: 2488375.3774 +/-      33.6
Perihelion:          36.04241868 +/-    0.0122
Aphelion:            48.31690184 +/-    0.0136
Period (y)              273.9446 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           39.50854870 +/-    0.0021
Ecliptic Y          -21.17646551 +/-    0.0011
Ecliptic Z            7.17732310 +/-    0.0004
Ecliptic XDOT         0.00082362 +/-    0.0000
Ecliptic YDOT         0.00229192 +/-    0.0000
Ecliptic ZDOT         0.00029982 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.39701713 +/-    0.0019
Geocenter to KBO     44.44566789 +/-    0.0024
# Hcoef:  6.37

The following table shows the complete astrometric record for 16PN219. 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 (16PN219) followed by the observatory code and reference code for the source of the astrometry.

2013 09  11.18515  22 00 37.973  -02 16 02.37  23.9g 16PN219   W84  C~52ZF      
2016 08  15.26497  22 14 38.189  -00 25 18.58  21.8z 16PN219   W84  C~52ZF      
2016 08  30.20534  22 13 34.322  -00 30 47.42  23.9g 16PN219   W84  C~52ZF      
2016 09  26.08813  22 11 47.431  -00 42 08.72  22.4i 16PN219   W84  C~52ZF      
2016 09  26.08950  22 11 47.428  -00 42 08.73  22.7r 16PN219   W84  C~52ZF      
2016 09  26.09087  22 11 47.426  -00 42 08.84  23.4g 16PN219   W84  C~52ZF      
2016 09  29.07905  22 11 37.149  -00 43 25.46  22.9z 16PN219   W84  C~52ZF      
2017 09  27.09571  22 15 49.071  -00 08 42.69  22.2z 16PN219   W84  C~52ZF      
2017 09  27.09709  22 15 49.063  -00 08 42.79  23.1r 16PN219   W84  C~52ZF      
2017 09  27.09846  22 15 49.056  -00 08 42.83  22.4i 16PN219   W84  C~52ZF      
2017 10  10.10988  22 15 07.597  -00 14 15.23  23.9g 16PN219   W84  C~52ZF      
2017 10  21.06262  22 14 40.721  -00 18 33.53  22.9r 16PN219   W84  C~52ZF      
2017 10  21.06399  22 14 40.707  -00 18 33.64  22.8i 16PN219   W84  C~52ZF      
2018 09  17.21221  22 20 33.374  +00 29 45.37  23.3r 16PN219   W84  C~52ZF      
2018 09  17.21359  22 20 33.368  +00 29 45.28  22.1z 16PN219   W84  C~52ZF      
2018 09  17.21497  22 20 33.368  +00 29 45.36  22.6i 16PN219   W84  C~52ZF      
2018 11  26.03549  22 18 19.227  +00 05 23.31  22.6z 16PN219   W84  C~52ZF      

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     0.04
     2   2.9270      0.00     0.09       0.00     0.17
     3   2.9679      0.00     0.03       0.00    -0.20
     4   3.0415      0.00    -0.06       0.00    -0.05
     5   3.0415      0.00    -0.03       0.00    -0.03
     6   3.0415      0.00     0.01       0.00    -0.10
     7   3.0497      0.00     0.03       0.00     0.03
     8   4.0436      0.00     0.05       0.00     0.05
     9   4.0436      0.00     0.01       0.00    -0.01
    10   4.0436      0.00    -0.02       0.00    -0.01
    11   4.0792      0.00     0.04       0.00     0.25
    12   4.1092      0.00     0.04       0.00     0.03
    13   4.1092      0.00    -0.13       0.00    -0.05
    14   5.0158      0.00    -0.05       0.00    -0.05
    15   5.0158      0.00    -0.05       0.00    -0.10
    16   5.0158      0.00     0.03       0.00     0.02
    17   5.2070      0.00     0.07       0.00     0.06

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.

16PN219    quality flag:3

Type:          5:3EE     5:3EE     5:3EE

axisobj        42.358    42.358    42.358
ecceobj         0.143     0.143     0.143
incobj         12.299    12.299    12.299
qmin           34.607    34.610    34.603
qmax           50.499    50.498    50.499
amean          42.328    42.328    42.328
amin           41.937    41.935    41.938
amax           42.752    42.752    42.752
emean           0.154     0.154     0.154
emin            0.125     0.125     0.125
emax            0.181     0.181     0.181
imean          13.412    13.412    13.412
imin           12.579    12.577    12.580
imax           14.353    14.353    14.352
excite_mean     0.279     0.279     0.279
fracstop        1.000     1.000     1.000
cjmean          2.989     2.989     2.989

libcent 0       179.1     178.9     179.5
libamp  0        50.6      50.5      50.8
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       176.8     176.8     176.7
kozaiamp        180.0     180.0     180.0