Orbit Fit and Astrometric record for 04PY107

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: 04PY107   
# Created Tue Oct 17 01:37:31 2017
# Orbit generated from Bernstein formalism
# Fitting   12 observations of   12
# Arc:   3.96y
# First observation: 2004/08/14
#  Last observation: 2008/07/31
Preliminary a, adot, b, bdot, g, gdot:
   0.000059   0.025180  -0.000001  -0.000563   0.025511   0.000000
# Chi-squared of fit:     5.19 DOF:   18 RMS:  0.12
# Min/Max residuals:    -0.27    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.585272E-05  2.527222E-02  1.433417E-07 -5.639236E-04  2.493036E-02  1.399640E-03
# Covariance matrix:
  3.2924E-13 -3.0796E-13 -2.7048E-15  4.7247E-15  2.2070E-13 -2.0007E-12
 -3.0796E-13  8.8367E-13  5.1581E-15 -1.8066E-14  4.4865E-13  8.0087E-12
 -2.7048E-15  5.1581E-15  2.0780E-13 -7.4667E-14 -5.0028E-15  4.4114E-14
  4.7247E-15 -1.8066E-14 -7.4667E-14  6.6713E-14 -1.2676E-14 -1.7928E-13
  2.2070E-13  4.4865E-13 -5.0028E-15 -1.2676E-14  2.4643E-12  6.2154E-12
 -2.0007E-12  8.0087E-12  4.4114E-14 -1.7928E-13  6.2154E-12  7.9963E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.955599  -62.794888   -0.420157   -0.015355   -0.926046  2453231.536203
# Heliocentric elements and errors
Epoch:              2453230.5000  =  2004/08/13
Mean Anomaly:           40.64246 +/-     0.134
Argument of Peri:      167.85799 +/-     0.177
Long of Asc Node:       81.43935 +/-     0.013
Inclination:             1.57565 +/-     0.000
Eccentricity:         0.09600152 +/-    0.0003
Semi-Major Axis:     44.05326291 +/-    0.0115
Time of Perihelion: 2441173.3954 +/-      39.6
Perihelion:          39.82408249 +/-    0.0168
Aphelion:            48.28244333 +/-    0.0182
Period (y)              292.3986 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           19.12917620 +/-    0.0011
Ecliptic Y          -36.29947369 +/-    0.0022
Ecliptic Z           -0.66896218 +/-    0.0000
Ecliptic XDOT         0.00253622 +/-    0.0000
Ecliptic YDOT         0.00112608 +/-    0.0000
Ecliptic ZDOT        -0.00006438 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.03686980 +/-    0.0021
Geocenter to KBO     40.11173108 +/-    0.0025
# Hcoef:  6.24

The following table shows the complete astrometric record for 04PY107. 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 (04PY107) followed by the observatory code and reference code for the source of the astrometry.

2004 08  14.03546  19 57 50.58   -21 39 19.9   21.3R 04PY107   807  Cl2777      
2004 08  14.12835  19 57 50.14   -21 39 20.9         04PY107   807  Cl2777      
2004 08  15.10565  19 57 45.70   -21 39 33.3         04PY107   807  Cl2777      
2004 09  11.02976  19 56 05.58   -21 43 52.9   22.5R 04PY107   304  Cl4404      
2004 09  11.05692  19 56 05.50   -21 43 53.2         04PY107   304  Cl4404      
2005 08  08.06709  20 04 26.65   -21 22 26.4   21.3R 04PY107   807  Co3997      
2005 08  08.18352  20 04 26.08   -21 22 28.0         04PY107   807  Co3997      
2005 08  09.07254  20 04 21.81   -21 22 40.4         04PY107   807  Co3997      
2005 11  02.09139  20 01 50.35   -21 28 44.8   22.5R 04PY107   695  Cp0715      
2005 11  03.09427  20 01 52.65   -21 28 36.9         04PY107   695  Cp0715      
2008 07  31.28135  20 23 11.61   -20 29 01.5   22.7R 04PY107   688  Cz3518      
2008 07  31.32997  20 23 11.33   -20 29 02.6         04PY107   688  Cz3518      

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     0.04       0.00    -0.10
  2   0.0003     -6.21    -0.04       0.22     0.08
  3   0.0029    -69.34    -0.05       0.17    -0.27
  4   0.0766  -1488.63     0.06      16.52     0.14
  5   0.0767  -1489.78    -0.01      16.44     0.04
  6   0.9830   5619.38    -0.05    -117.32    -0.02
  7   0.9833   5611.26    -0.01    -117.25     0.01
  8   0.9857   5550.29     0.09    -117.10     0.02
  9   1.2185   3404.54     0.08     -42.55     0.01
 10   1.2212   3437.59    -0.10     -41.30     0.15
 11   3.9623  21777.53     0.26    -466.74     0.05
 12   3.9625  21773.40    -0.26    -466.89    -0.11

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.

04PY107    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.123    44.158    44.089
ecceobj         0.094     0.094     0.094
incobj          1.579     1.579     1.579
qmin           39.455    39.467    39.461
qmax           49.279    49.340    49.197
amean          44.230    44.264    44.197
amin           43.873    43.908    43.845
amax           44.613    44.641    44.583
emean           0.088     0.089     0.088
emin            0.072     0.073     0.072
emax            0.105     0.106     0.104
imean           0.738     0.733     0.744
imin            0.130     0.127     0.130
imax            1.152     1.138     1.168
excite_mean     0.089     0.090     0.089
fracstop        1.000     1.000     1.000
cjmean          3.095     3.095     3.094

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       170.8     171.9     170.0
kozaiamp        179.9     180.0     179.9