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 Tue Oct 24 01:37:31 2017
# Orbit generated from Bernstein formalism
# Fitting    8 observations of    8
# Arc:   2.18y
# First observation: 2004/08/14
#  Last observation: 2006/10/20
Preliminary a, adot, b, bdot, g, gdot:
  -0.000001   0.024024   0.000000  -0.000434   0.024361   0.000000
# Chi-squared of fit:     4.58 DOF:   10 RMS:  0.13
# Min/Max residuals:    -0.36    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.414432E-05  2.375025E-02 -1.792455E-07 -4.262274E-04  2.427323E-02 -1.069940E-02
# Covariance matrix:
  5.1181E-13  9.8101E-12  9.5119E-15 -2.9245E-13  3.1518E-12  3.1750E-10
  9.8101E-12  9.3767E-09  9.1343E-12 -2.8667E-10  2.0589E-09  3.1246E-07
  9.5119E-15  9.1343E-12  3.1125E-13 -4.2124E-13  2.0049E-12  3.0440E-10
 -2.9245E-13 -2.8667E-10 -4.2124E-13  8.9307E-12 -6.2890E-11 -9.5537E-09
  3.1518E-12  2.0589E-09  2.0049E-12 -6.2890E-11  4.5680E-10  6.8542E-08
  3.1750E-10  3.1246E-07  3.0440E-10 -9.5537E-09  6.8542E-08  1.0413E-05
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.514619  -17.293088    0.361912   -0.008430   -0.950377  2453231.798423
# Heliocentric elements and errors
Epoch:              2453230.5000  =  2004/08/13
Mean Anomaly:          322.16451 +/-     9.665
Argument of Peri:      294.89744 +/-     1.381
Long of Asc Node:      136.22314 +/-     0.077
Inclination:             1.14779 +/-     0.003
Eccentricity:         0.46614231 +/-    0.1365
Semi-Major Axis:     54.32690722 +/-    8.4485
Time of Perihelion: 2468602.0520 +/-    1600.4
Perihelion:          29.00283734 +/-    8.6799
Aphelion:            79.65097711 +/-   14.4370
Period (y)              400.4338 +/-     93.41
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.12972297 +/-    0.0346
Ecliptic Y          -12.87212676 +/-    0.0108
Ecliptic Z           -0.37004726 +/-    0.0003
Ecliptic XDOT        -0.00035825 +/-    0.0004
Ecliptic YDOT         0.00290962 +/-    0.0001
Ecliptic ZDOT        -0.00003713 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.14526365 +/-    0.0331
Geocenter to KBO     41.19765106 +/-    0.0363
# Hcoef:  6.27

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      

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     0.27       0.00    -0.02
  2   0.0003     -7.36     0.08       0.13     0.11
  3   0.0029    -70.73    -0.36      -0.45     0.03
  4   0.0820  -2118.08     0.03      -9.49    -0.08
  5   0.0821  -2121.60    -0.02      -9.45    -0.05
  6   2.1790   5553.72    -0.04    -185.46    -0.11
  7   2.1792   5549.02     0.09    -185.12     0.15
  8   2.1817   5503.16    -0.04    -185.04    -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.

04PA108    quality flag:0

Type:      ERR2LARGE ERR2LARGE ERR2LARGE

axisobj         0.000     0.000     0.000
ecceobj        -1.000    -1.000    -1.000
incobj         -1.000    -1.000    -1.000
qmin            0.000     0.000     0.000
qmax            0.000     0.000     0.000
amean           0.000     0.000     0.000
amin            0.000     0.000     0.000
amax            0.000     0.000     0.000
emean           0.000     0.000     0.000
emin            0.000     0.000     0.000
emax            0.000     0.000     0.000
imean           0.000     0.000     0.000
imin            0.000     0.000     0.000
imax            0.000     0.000     0.000
excite_mean     0.000     0.000     0.000
fracstop        0.000     0.000     0.000
cjmean          0.000     0.000     0.000

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         0.0       0.0       0.0
kozaiamp          0.0       0.0       0.0