Orbit Fit and Astrometric record for 16PU219

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: 16PU219   
# Created Wed Dec  8 02:13:52 2021
# Orbit generated from Bernstein formalism
# Fitting      8 observations of      8
# Arc:   4.84y
# First observation: 2013/11/08
#  Last observation: 2018/09/11
Preliminary a, adot, b, bdot, g, gdot:
  -0.000478   0.023421  -0.000228   0.015222   0.027019   0.000000
# Chi-squared of fit:     3.04 DOF:     10 RMS:  0.11
# Min/Max residuals:    -0.25    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.361613E-05  2.309998E-02  8.758152E-06  1.505230E-02  2.695848E-02 -1.657281E-03
# Covariance matrix:
  1.3945E-12 -6.4526E-13  1.3048E-13 -1.9045E-13 -2.0455E-13 -2.7441E-12
 -6.4526E-13  5.1537E-13 -1.6738E-13  2.4391E-13  2.8446E-13  3.5147E-12
  1.3048E-13 -1.6738E-13  1.2172E-12 -4.3387E-13 -1.8978E-13 -1.5535E-12
 -1.9045E-13  2.4391E-13 -4.3387E-13  2.6622E-13  2.6133E-13  2.2428E-12
 -2.0455E-13  2.8446E-13 -1.8978E-13  2.6133E-13  1.1435E-12  3.7775E-12
 -2.7441E-12  3.5147E-12 -1.5535E-12  2.2428E-12  3.7775E-12  3.2334E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -12.281342   21.121943   -0.410991   -0.191336   -0.879593  2456604.732558
# Heliocentric elements and errors
Epoch:              2456600.5000  =  2013/11/04
Mean Anomaly:          284.15026 +/-     0.102
Argument of Peri:       60.41151 +/-     0.116
Long of Asc Node:       39.38122 +/-     0.000
Inclination:            35.05493 +/-     0.001
Eccentricity:         0.05134295 +/-    0.0002
Semi-Major Axis:     38.36199632 +/-    0.0059
Time of Perihelion: 2474885.7887 +/-      24.2
Perihelion:          36.39237840 +/-    0.0099
Aphelion:            40.33161423 +/-    0.0102
Period (y)              237.6074 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           34.50087274 +/-    0.0013
Ecliptic Y           13.77173463 +/-    0.0005
Ecliptic Z           -7.89010253 +/-    0.0003
Ecliptic XDOT        -0.00070164 +/-    0.0000
Ecliptic YDOT         0.00224458 +/-    0.0000
Ecliptic ZDOT         0.00152964 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.97663246 +/-    0.0012
Geocenter to KBO     37.09407551 +/-    0.0015
# Hcoef:  8.18

The following table shows the complete astrometric record for 16PU219. 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 (16PU219) followed by the observatory code and reference code for the source of the astrometry.

2013 11  08.23178  01 36 23.307  -03 09 30.82  24.6r 16PU219   W84  C~52ZG      
2016 08  14.39759  01 53 27.606  +01 14 19.37  23.2g 16PU219   W84  C~52ZG      
2016 10  23.19963  01 48 42.705  +00 48 42.53  23.4r 16PU219   W84  C~52ZG      
2016 10  28.17428  01 48 15.738  +00 47 05.09  24.0i 16PU219   W84  C~52ZG      
2016 11  28.12724  01 45 43.422  +00 41 07.23  24.2r 16PU219   W84  C~52ZG      
2016 11  30.13998  01 45 35.205  +00 41 01.86  23.7i 16PU219   W84  C~52ZG      
2017 09  14.30679  01 55 37.056  +02 22 07.09  24.2r 16PU219   W84  C~52ZG      
2018 09  11.34733  01 59 29.587  +03 41 28.03  24.1r 16PU219   W84  C~52ZG      

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    -0.01       0.00     0.01
     2   2.7657  20228.49    -0.05    9001.17     0.07
     3   2.9568  15652.16     0.19    9159.89     0.23
     4   2.9704  15237.90     0.06    9219.78    -0.25
     5   3.0552  12972.35    -0.13    9737.50    -0.02
     6   3.0607  12855.45    -0.01    9778.41    -0.08
     7   3.8496  23594.92    -0.04   12087.57    -0.01
     8   4.8408  28702.90    -0.00   15272.86     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.

16PU219    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        38.536    38.553    38.519
ecceobj         0.050     0.050     0.049
incobj         34.999    34.999    35.000
qmin           35.957    35.933    36.001
qmax           40.897    40.944    40.822
amean          38.348    38.347    38.334
amin           38.060    38.053    38.052
amax           38.648    38.636    38.625
emean           0.047     0.049     0.047
emin            0.035     0.037     0.036
emax            0.059     0.060     0.057
imean          34.281    34.272    34.286
imin           33.937    33.917    33.937
imax           34.639    34.620    34.642
excite_mean     0.565     0.565     0.565
fracstop        1.000     1.000     1.000
cjmean          2.648     2.649     2.648

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       176.1     174.7     177.8
kozaiamp        179.9     180.0     179.9