Orbit Fit and Astrometric record for 04HG79

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: 04HG79    
# Created Sat Oct 21 01:37:29 2017
# Orbit generated from Bernstein formalism
# Fitting   19 observations of   20
# Arc:  10.97y
# First observation: 2004/04/24
#  Last observation: 2015/04/15
Preliminary a, adot, b, bdot, g, gdot:
  -0.000188   0.023344   0.000023  -0.001449   0.023868   0.000000
# Chi-squared of fit:    13.92 DOF:   32 RMS:  0.15
# Min/Max residuals:    -0.37    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.553735E-05  2.286054E-02 -5.648859E-07 -1.420009E-03  2.368159E-02 -4.031707E-05
# Covariance matrix:
  2.4609E-13 -1.0767E-13 -2.8263E-15  5.2292E-15  1.6855E-13 -3.1932E-13
 -1.0767E-13  2.5269E-13  9.2123E-15 -1.5535E-14  1.2328E-13  9.4252E-13
 -2.8263E-15  9.2123E-15  1.0737E-13 -1.2980E-14  6.1028E-15  3.5375E-14
  5.2292E-15 -1.5535E-14 -1.2980E-14  6.0941E-15 -9.3154E-15 -5.9459E-14
  1.6855E-13  1.2328E-13  6.1028E-15 -9.3154E-15  5.1691E-13  5.6078E-13
 -3.1932E-13  9.4252E-13  3.5375E-14 -5.9459E-14  5.6078E-13  3.6064E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.585115 -132.531204    0.221204    0.010052   -0.979261  2453119.929133
# Heliocentric elements and errors
Epoch:              2453110.5000  =  2004/04/15
Mean Anomaly:          350.86878 +/-     0.179
Argument of Peri:      180.42435 +/-     0.189
Long of Asc Node:       56.31733 +/-     0.000
Inclination:             3.59271 +/-     0.000
Eccentricity:         0.02611049 +/-    0.0001
Semi-Major Axis:     44.35045606 +/-    0.0052
Time of Perihelion: 2455846.8500 +/-      53.6
Perihelion:          43.19244414 +/-    0.0064
Aphelion:            45.50846798 +/-    0.0066
Period (y)              295.3625 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -29.37190930 +/-    0.0009
Ecliptic Y          -31.68626505 +/-    0.0009
Ecliptic Z            0.43122264 +/-    0.0000
Ecliptic XDOT         0.00194660 +/-    0.0000
Ecliptic YDOT        -0.00179133 +/-    0.0000
Ecliptic ZDOT        -0.00016408 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.20780487 +/-    0.0009
Geocenter to KBO     42.22689109 +/-    0.0013
# Hcoef:  7.14

The following table shows the complete astrometric record for 04HG79. 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 (04HG79) followed by the observatory code and reference code for the source of the astrometry.

2004 04  24.42839  15 00 42.30   -16 29 01.0         04HG79    568  C~0VDp      
2004 04  24.45453  15 00 42.18   -16 29 00.5         04HG79    568  C~0VDp      
2004 04  25.43410  15 00 37.71   -16 28 42.2   23.4g 04HG79    568  C~0VDp      
2004 04  25.45680  15 00 37.61   -16 28 41.7   23.4g 04HG79    568  C~0VDp      
2004 04  25.48375  15 00 37.47   -16 28 41.2   23.6g 04HG79    568  C~0VDp      
2004 07  08.26064  14 55 51.62   -16 09 50.6   23.4i 04HG79    568  C~0VDp      
2004 07  08.32344  14 55 51.50   -16 09 50.2   23.4i 04HG79    568  C~0VDp      
2004 07  08.38483  14 55 51.37   -16 09 49.8         04HG79    568  C~0VDp      
2005 05  08.42069  15 04 48.43   -16 51 19.3   23.0r 04HG79    568  C~0VDp      
2005 05  08.45260  15 04 48.28   -16 51 18.7   23.2r 04HG79    568  C~0VDp      
2005 05  08.48437  15 04 48.13   -16 51 18.1   23.2r 04HG79    568  C~0VDp      
2005 05  10.47732  15 04 38.69   -16 50 41.1   23.1r 04HG79    568  C~0VDp      
2005 07  08.33665  15 00 57.67   -16 36 32.2   22.8r 04HG79    568  C~0VDp      
2005 07  08.38445  15 00 57.57   -16 36 31.9   22.8r 04HG79    568  C~0VDp      
2006 06  03.39240  15 08 02.04   -17 09 58.8         04HG79    568  C~0VDp      
2006 06  03.40838  15 08 01.96   -17 09 58.5         04HG79    568  C~0VDp      
2006 06  03.42486  15 08 01.90   -17 09 57.8         04HG79    568  C~0VDp      
2015 04  15.37869  15 59 31.32   -20 52 42.7   23.0R 04HG79    695  C~1RHU      
2015 04  15.41653  15 59 31.20   -20 52 42.4         04HG79    695  C~1RHU      
2015 04  15.45454  15 59 31.04   -20 52 41.8         04HG79    695  C~1RHU      

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    -0.06       0.00    -0.08
  2   0.0001     -1.80    -0.04      -0.00    -0.06
  3   0.0028    -68.64     0.07      -0.47     0.06
  4   0.0028    -70.17     0.13      -0.39     0.16
  5   0.0029    -72.24    -0.07      -0.48     0.10
  6   0.2049  -4339.54    -0.09     -82.10    -0.31
  7   0.2051  -4341.31    -0.04     -82.21    -0.31
  8   0.2052  -4343.22    -0.18     -82.36    -0.37
  9   1.0376   3769.83     0.03    -302.49     0.12
 10   1.0377   3767.59     0.08    -302.51     0.14
 11   1.0378   3765.36     0.11    -302.53     0.16
 12   1.0433   3624.84    -0.12    -304.31    -0.01
 13   1.2044    338.60     0.23    -371.18     0.18
 14   1.2045    337.14     0.23    -371.29     0.13
 15   2.1080   6749.22    -0.07    -619.94     0.09
 16   2.1081   6748.03    -0.22    -619.96     0.08
 17   2.1081   6747.01 (  -0.17)   -619.52 (   0.54)
 18  10.9732  53621.25    -0.14   -3279.31    -0.10
 19  10.9733  53619.43     0.21   -3279.36    -0.09
 20  10.9734  53616.95    -0.07   -3279.21     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.

04HG79    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.935    43.950    43.919
ecceobj         0.018     0.019     0.018
incobj          3.607     3.607     3.607
qmin           42.671    42.692    42.664
qmax           46.041    46.026    45.988
amean          44.261    44.276    44.245
amin           43.920    43.932    43.904
amax           44.610    44.626    44.592
emean           0.018     0.018     0.018
emin            0.002     0.002     0.002
emax            0.032     0.032     0.031
imean           2.387     2.388     2.385
imin            1.777     1.781     1.772
imax            2.896     2.896     2.896
excite_mean     0.046     0.046     0.045
fracstop        1.000     1.000     1.000
cjmean          3.102     3.102     3.102

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       184.2     183.0     183.7
kozaiamp        179.9     180.0     180.0