Orbit Fit and Astrometric record for 04HK79

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: 04HK79    
# Created Wed Oct 18 01:37:30 2017
# Orbit generated from Bernstein formalism
# Fitting   19 observations of   19
# Arc:   8.88y
# First observation: 2004/04/26
#  Last observation: 2013/03/14
Preliminary a, adot, b, bdot, g, gdot:
  -0.000821   0.025759   0.000009  -0.000636   0.023598   0.000000
# Chi-squared of fit:    48.60 DOF:   32 RMS:  0.28
# Min/Max residuals:    -1.15    0.44
# Exact a, adot, b, bdot, g, gdot:
  1.658288E-05  2.492466E-02 -1.271463E-06 -6.210238E-04  2.480451E-02 -1.430138E-03
# Covariance matrix:
  2.5255E-13 -2.0231E-13 -1.9842E-15  3.9583E-15  1.3160E-13 -6.6765E-13
 -2.0231E-13  2.6535E-13  3.0949E-15 -5.6607E-15 -1.3246E-13  9.5300E-13
 -1.9842E-15  3.0949E-15  1.1726E-13 -1.8179E-14  9.1288E-16  1.2483E-14
  3.9583E-15 -5.6607E-15 -1.8179E-14  8.2701E-15  1.8809E-15 -2.1393E-14
  1.3160E-13 -1.3246E-13  9.1288E-16  1.8809E-15  4.6441E-13 -3.3019E-13
 -6.6765E-13  9.5300E-13  1.2483E-14 -2.1393E-14 -3.3019E-13  3.5961E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.345339 -153.702789   -0.179597    0.023267   -0.988129  2453121.832763
# Heliocentric elements and errors
Epoch:              2453120.5000  =  2004/04/25
Mean Anomaly:          324.57955 +/-     0.067
Argument of Peri:      178.79999 +/-     0.081
Long of Asc Node:       69.05220 +/-     0.004
Inclination:             1.94273 +/-     0.000
Eccentricity:         0.08176155 +/-    0.0001
Semi-Major Axis:     44.13755468 +/-    0.0061
Time of Perihelion: 2463658.6031 +/-      19.9
Perihelion:          40.52879965 +/-    0.0064
Aphelion:            47.74630971 +/-    0.0073
Period (y)              293.2382 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -36.94307621 +/-    0.0010
Ecliptic Y          -18.45327856 +/-    0.0005
Ecliptic Z            0.94650389 +/-    0.0000
Ecliptic XDOT         0.00135586 +/-    0.0000
Ecliptic YDOT        -0.00240413 +/-    0.0000
Ecliptic ZDOT        -0.00007211 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.30629782 +/-    0.0009
Geocenter to KBO     40.31524868 +/-    0.0011
# Hcoef:  7.15

The following table shows the complete astrometric record for 04HK79. 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 (04HK79) followed by the observatory code and reference code for the source of the astrometry.

2004 04  26.33202  13 39 31.79   -08 53 44.6   23.3g 04HK79    568  C~0VDp      
2004 04  26.35319  13 39 31.69   -08 53 44.0   23.2g 04HK79    568  C~0VDp      
2004 04  26.37961  13 39 31.57   -08 53 43.5   23.1g 04HK79    568  C~0VDp      
2004 04  27.33028  13 39 27.28   -08 53 19.2   23.6g 04HK79    568  C~0VDp      
2004 06  20.28067  13 36 26.41   -08 37 25.4   22.9i 04HK79    568  C~0VDp      
2004 06  20.33344  13 36 26.33   -08 37 25.0   22.9i 04HK79    568  C~0VDp      
2004 06  20.38204  13 36 26.24   -08 37 24.8   22.8i 04HK79    568  C~0VDp      
2005 05  04.35042  13 44 18.68   -09 23 25.6   22.9r 04HK79    568  C~0VDp      
2005 05  04.38468  13 44 18.53   -09 23 24.7   23.2r 04HK79    568  C~0VDp      
2005 05  04.42866  13 44 18.33   -09 23 23.8   23.0r 04HK79    568  C~0VDp      
2005 05  05.39541  13 44 14.06   -09 23 00.4   22.7r 04HK79    568  C~0VDp      
2006 01  28.49815  13 54 48.44   -10 25 23.3         04HK79    675  C~0VDp      
2006 01  29.50281  13 54 48.63   -10 25 21.9         04HK79    675  C~0VDp      
2006 05  02.24354  13 49 52.99   -09 57 03.6         04HK79    695  C~0VDp      
2006 05  04.18169  13 49 44.24   -09 56 16.1   22.9r 04HK79    695  C~0VDp      
2006 05  04.26682  13 49 43.85   -09 56 14.0   22.2r 04HK79    695  C~0VDp      
2013 03  13.42100  14 31 57.95   -13 54 08.6   22.9R 04HK79    695  C~0ud8      
2013 03  13.49848  14 31 57.73   -13 54 07.6         04HK79    695  C~0ud8      
2013 03  14.49217  14 31 54.78   -13 53 52.4         04HK79    695  C~0ud8      

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    -0.14       0.00     0.18
  2   0.0001     -1.60    -0.19       0.02     0.23
  3   0.0001     -3.44    -0.09      -0.15     0.09
  4   0.0027    -71.50     0.32      -0.44     0.44
  5   0.1504  -2916.54    -0.10     -81.82     0.11
  6   0.1506  -2917.79    -0.01     -81.88     0.18
  7   0.1507  -2919.11    -0.11     -82.18     0.00
  8   1.0213   4605.64     0.11    -134.96    -0.23
  9   1.0214   4603.24     0.16    -134.91    -0.14
 10   1.0215   4600.15     0.21    -135.13    -0.29
 11   1.0241   4532.74     0.28    -135.89    -0.16
 12   1.7582  14648.37    -0.34    -315.67    -1.15
 13   1.7609  14650.51     0.23    -313.37    -0.40
 14   2.0148   9950.49    -0.26    -261.25     0.09
 15   2.0201   9812.46    -0.04    -262.61     0.41
 16   2.0204   9806.31    -0.05    -262.68     0.44
 17   8.8791  50596.21    -0.09   -1182.72     0.02
 18   8.8793  50592.66     0.15   -1182.80    -0.06
 19   8.8820  50544.36    -0.04   -1182.00     0.21

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.

04HK79    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.632    43.650    43.614
ecceobj         0.075     0.075     0.075
incobj          1.947     1.947     1.947
qmin           39.970    39.957    39.976
qmax           48.172    48.207    48.233
amean          43.958    43.977    43.940
amin           43.616    43.628    43.584
amax           44.333    44.350    44.324
emean           0.070     0.071     0.070
emin            0.054     0.054     0.053
emax            0.087     0.088     0.088
imean           0.815     0.816     0.815
imin            0.105     0.095     0.115
imax            1.268     1.265     1.271
excite_mean     0.072     0.072     0.072
fracstop        1.000     1.000     1.000
cjmean          3.095     3.095     3.095

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       183.1     184.3     182.2
kozaiamp        180.0     180.0     180.0