Orbit Fit and Astrometric record for 04PU117

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: 04PU117   
# Created Sun Oct 21 01:08:25 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   17 observations of   17
# Arc:   9.14y
# First observation: 2004/08/15
#  Last observation: 2013/10/06
# Chi-squared of fit:    29.05 DOF:   28 RMS:  0.23
# Min/Max residuals:    -0.49    0.62
# Exact a, adot, b, bdot, g, gdot:
  1.466888E-05  2.339098E-02  6.908040E-07  1.825721E-04  2.412727E-02 -4.008623E-04
# Covariance matrix:
  3.2261E-13 -2.6459E-13  1.7824E-15 -2.4409E-15 -3.1325E-14 -1.1392E-12
 -2.6459E-13  3.9086E-13 -2.7507E-15  4.2766E-15 -1.0895E-13  1.8710E-12
  1.7824E-15 -2.7507E-15  1.5668E-13 -2.4686E-14  4.9434E-16 -1.3442E-14
 -2.4409E-15  4.2766E-15 -2.4686E-14  1.1768E-14 -3.1147E-15  2.1947E-14
 -3.1325E-14 -1.0895E-13  4.9434E-16 -3.1147E-15  7.4382E-13 -8.5601E-13
 -1.1392E-12  1.8710E-12 -1.3442E-14  2.1947E-14 -8.5601E-13  9.3754E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.858718  -52.998884   -0.277757   -0.031667   -0.977633  2453232.837463
# Heliocentric elements and errors
Epoch:              2453232.5000  =  2004/08/15
Mean Anomaly:          303.98781 +/-     0.847
Argument of Peri:      341.43282 +/-     0.872
Long of Asc Node:       22.97669 +/-     0.008
Inclination:             1.87474 +/-     0.000
Eccentricity:         0.01078062 +/-    0.0001
Semi-Major Axis:     42.67565745 +/-    0.0068
Time of Perihelion: 2469075.9142 +/-     240.5
Perihelion:          42.21558728 +/-    0.0076
Aphelion:            43.13572761 +/-    0.0078
Period (y)              278.7909 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           25.73774059 +/-    0.0009
Ecliptic Y          -33.69539325 +/-    0.0012
Ecliptic Z           -1.34427179 +/-    0.0001
Ecliptic XDOT         0.00209090 +/-    0.0000
Ecliptic YDOT         0.00162621 +/-    0.0000
Ecliptic ZDOT         0.00002229 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.42190903 +/-    0.0011
Geocenter to KBO     41.44691256 +/-    0.0015
# Hcoef:  7.16

The following table shows the complete astrometric record for 04PU117. 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 (04PU117) followed by the observatory code and reference code for the source of the astrometry.

2004 08  15.33672  20 39 35.69   -20 19 12.6   23.1g 04PU117   568  C~0VDr      
2004 08  15.36789  20 39 35.53   -20 19 13.1   23.5g 04PU117   568  C~0VDr      
2004 08  15.39461  20 39 35.40   -20 19 13.6   23.3g 04PU117   568  C~0VDr      
2004 08  16.30448  20 39 31.17   -20 19 28.6   23.4g 04PU117   568  C~0VDr      
2005 07  12.18589  20 47 49.83   -19 47 11.4   23.2R 04PU117   809  C~0VDr      
2005 07  12.27837  20 47 49.42   -19 47 13.1   23.0R 04PU117   809  C~0VDr      
2005 07  12.32788  20 47 49.20   -19 47 14.2   23.3R 04PU117   809  C~0VDr      
2005 10  03.12724  20 42 15.68   -20 07 03.5   23. R 04PU117   675  C~0VDr      
2005 10  03.17120  20 42 15.58   -20 07 03.6         04PU117   675  C~0VDr      
2006 07  20.42973  20 52 41.06   -19 27 19.6         04PU117   568  C~0VDr      
2006 07  20.45624  20 52 40.94   -19 27 19.9         04PU117   568  C~0VDr      
2006 07  20.48260  20 52 40.80   -19 27 20.4         04PU117   568  C~0VDr      
2006 07  26.26342  20 52 13.36   -19 29 12.9         04PU117   675  C~0VDs      
2006 07  26.31002  20 52 13.12   -19 29 13.4         04PU117   675  C~0VDs      
2013 10  05.12875  21 25 04.79   -16 58 12.0   23.6R 04PU117   695  C~0zda      
2013 10  05.25088  21 25 04.51   -16 58 12.7         04PU117   695  C~0zda      
2013 10  06.14249  21 25 02.42   -16 58 20.6         04PU117   695  C~0zda      

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     0.17       0.00    -0.08
  2   0.0001      0.00     0.00       0.00    -0.06
  3   0.0002      0.00    -0.03       0.00    -0.12
  4   0.0026      0.00     0.17       0.00    -0.19
  5   0.9058      0.00    -0.28       0.00     0.07
  6   0.9061      0.00    -0.05       0.00     0.08
  7   0.9062      0.00     0.07       0.00    -0.12
  8   1.1329      0.00     0.15       0.00    -0.26
  9   1.1330      0.00    -0.14       0.00    -0.18
 10   1.9277      0.00    -0.08       0.00     0.24
 11   1.9278      0.00     0.02       0.00     0.45
 12   1.9278      0.00    -0.19       0.00     0.46
 13   1.9437      0.00     0.18       0.00    -0.27
 14   1.9438      0.00    -0.01       0.00     0.14
 15   9.1384      0.00    -0.49       0.00    -0.33
 16   9.1387      0.00    -0.07       0.00     0.07
 17   9.1412      0.00     0.62       0.00     0.10

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.

04PU117    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.855    42.855    42.855
ecceobj         0.017     0.017     0.017
incobj          1.873     1.873     1.873
qmin           41.034    41.035    41.032
qmax           44.830    44.833    44.825
amean          42.881    42.881    42.881
amin           42.550    42.549    42.550
amax           43.214    43.212    43.217
emean           0.022     0.022     0.022
emin            0.000     0.000     0.000
emax            0.038     0.038     0.038
imean           1.863     1.863     1.863
imin            0.671     0.671     0.671
imax            2.703     2.703     2.703
excite_mean     0.041     0.041     0.041
fracstop        1.000     1.000     1.000
cjmean          3.086     3.086     3.086

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       184.0     183.9     184.0
kozaiamp        179.9     180.0     180.0