Orbit Fit and Astrometric record for 04PA108

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: 04PA108   
# Created Thu Dec  9 02:10:00 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     20 observations of     20
# Arc:  13.25y
# First observation: 2004/08/14
#  Last observation: 2017/11/15
# Chi-squared of fit:    22.74 DOF:     34 RMS:  0.19
# Min/Max residuals:    -0.70    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.419149E-05  2.407650E-02 -9.716245E-08 -4.358681E-04  2.434497E-02  1.490793E-04
# Covariance matrix:
  2.8370E-13 -6.2676E-14 -6.7389E-16  8.9083E-16  8.9991E-14 -1.5322E-13
 -6.2676E-14  1.5248E-13  1.9354E-15 -2.8141E-15  1.4522E-13  4.7322E-13
 -6.7389E-16  1.9354E-15  2.0822E-13 -1.7236E-14  1.6778E-15  6.1068E-15
  8.9083E-16 -2.8141E-15 -1.7236E-14  2.1968E-15 -2.6326E-15 -8.8647E-15
  8.9991E-14  1.4522E-13  1.6778E-15 -2.6326E-15  4.3075E-13  4.3528E-13
 -1.5322E-13  4.7322E-13  6.1068E-15 -8.8647E-15  4.3528E-13  1.4913E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.514619  -17.293088    0.361913   -0.008430   -0.950376  2453231.798423
# Heliocentric elements and errors
Epoch:              2453232.5000  =  2004/08/15
Mean Anomaly:          356.46954 +/-     0.076
Argument of Peri:      209.57166 +/-     0.082
Long of Asc Node:      136.44655 +/-     0.003
Inclination:             1.15702 +/-     0.000
Eccentricity:         0.03604846 +/-    0.0001
Semi-Major Axis:     43.59208299 +/-    0.0042
Time of Perihelion: 2454263.4511 +/-      27.0
Perihelion:          42.02065564 +/-    0.0051
Aphelion:            45.16351033 +/-    0.0054
Period (y)              287.8191 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.01381649 +/-    0.0011
Ecliptic Y          -12.83604102 +/-    0.0003
Ecliptic Z           -0.36895350 +/-    0.0000
Ecliptic XDOT         0.00081853 +/-    0.0000
Ecliptic YDOT         0.00257341 +/-    0.0000
Ecliptic ZDOT        -0.00004906 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.02387071 +/-    0.0010
Geocenter to KBO     41.07628179 +/-    0.0011
# Hcoef:  6.80

The following table shows the complete astrometric record for 04PA108. 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 (04PA108) followed by the observatory code and reference code for the source of the astrometry.

2004 08  14.29768  22 57 01.64   -07 15 58.2   21.5R 04PA108   807  Cl2777      
2004 08  14.40415  22 57 01.18   -07 16 00.9         04PA108   807  Cl2777      
2004 08  15.34845  22 56 57.26   -07 16 25.7         04PA108   807  Cl2777      
2004 09  13.23951  22 54 50.32   -07 29 36.7   22.6R 04PA108   304  Cl4404      
2004 09  13.28756  22 54 50.10   -07 29 38.0         04PA108   304  Cl4404      
2006 10  19.17414  23 02 50.72   -06 43 15.5   22.3R 04PA108   695  Ct0488      
2006 10  19.26624  23 02 50.42   -06 43 17.0         04PA108   695  Ct0488      
2006 10  20.16577  23 02 47.58   -06 43 34.6         04PA108   695  Ct0488      
2014 08  18.28289  23 48 04.500  -02 06 22.68  22.7z 04PA108   W84  C~52FZ      
2016 08  15.25732  23 58 21.295  -01 02 15.93  22.3z 04PA108   W84  C~52FZ      
2016 10  06.05316  23 54 46.241  -01 25 57.03  22.9z 04PA108   W84  C~52FZ      
2016 10  07.05381  23 54 41.984  -01 26 24.24  22.3i 04PA108   W84  C~52FZ      
2016 10  07.08247  23 54 41.868  -01 26 25.22  24.1g 04PA108   W84  C~52FZ      
2016 10  09.14158  23 54 33.197  -01 27 21.24  23.3r 04PA108   W84  C~52FZ      
2017 08  18.30775  00 03 15.210  -00 31 46.33  22.6i 04PA108   W84  C~52FZ      
2017 08  18.30913  00 03 15.202  -00 31 46.27  23.8g 04PA108   W84  C~52FZ      
2017 09  18.22502  00 01 10.366  -00 45 37.66  24.0g 04PA108   W84  C~52FZ      
2017 10  17.18644  23 59 05.787  -00 59 07.15  23.5r 04PA108   W84  C~52FZ      
2017 11  10.04642  23 57 45.423  -01 07 35.98  23.5r 04PA108   W84  C~52FZ      
2017 11  15.03651  23 57 33.099  -01 08 51.77  22.8i 04PA108   W84  C~52FZ      

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     0.29       0.00     0.08
     2   0.0003      0.00     0.06       0.00     0.13
     3   0.0029      0.00    -0.27       0.00    -0.10
     4   0.0820      0.00     0.08       0.00     0.11
     5   0.0821      0.00     0.02       0.00     0.11
     6   2.1790      0.00     0.29       0.00    -0.11
     7   2.1792      0.00     0.21       0.00     0.15
     8   2.1817      0.00    -0.70       0.00    -0.43
     9  10.0095      0.00     0.05       0.00     0.09
    10  12.0026      0.00     0.09       0.00     0.14
    11  12.1444      0.00     0.06       0.00    -0.15
    12  12.1472      0.00    -0.00       0.00     0.13
    13  12.1473      0.00     0.11       0.00    -0.06
    14  12.1529      0.00     0.12       0.00    -0.12
    15  13.0103      0.00    -0.13       0.00    -0.08
    16  13.0103      0.00    -0.18       0.00     0.01
    17  13.0949      0.00    -0.18       0.00     0.25
    18  13.1742      0.00    -0.00       0.00     0.04
    19  13.2396      0.00     0.13       0.00    -0.15
    20  13.2532      0.00     0.08       0.00     0.01

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.

04PA108    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.032    44.032    44.032
ecceobj         0.046     0.046     0.046
incobj          1.154     1.154     1.154
qmin           41.158    41.159    41.158
qmax           46.720    46.719    46.721
amean          43.849    43.850    43.850
amin           43.537    43.537    43.537
amax           44.179    44.178    44.180
emean           0.042     0.042     0.042
emin            0.026     0.026     0.026
emax            0.058     0.058     0.058
imean           1.485     1.485     1.485
imin            0.774     0.774     0.774
imax            2.107     2.107     2.106
excite_mean     0.050     0.050     0.050
fracstop        1.000     1.000     1.000
cjmean          3.097     3.097     3.097

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       186.5     186.4     186.4
kozaiamp        179.9     180.0     180.0