Orbit Fit and Astrometric record for 04HA79

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: 04HA79    
# Created Thu Oct 18 01:08:23 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   16 observations of   16
# Arc:   8.88y
# First observation: 2004/04/26
#  Last observation: 2013/03/14
# Chi-squared of fit:    12.03 DOF:   26 RMS:  0.15
# Min/Max residuals:    -0.42    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.500838E-05  2.458219E-02  5.923722E-06  1.026373E-02  2.672455E-02  6.559148E-03
# Covariance matrix:
  4.2720E-13 -2.4605E-13  3.7572E-14 -5.9654E-14  5.8943E-13 -6.6409E-13
 -2.4605E-13  2.8052E-13 -5.7941E-14  9.3967E-14 -2.1910E-13  1.0367E-12
  3.7572E-14 -5.7941E-14  1.5559E-13 -4.3150E-14  3.4396E-15 -2.4233E-13
 -5.9654E-14  9.3967E-14 -4.3150E-14  4.5291E-14 -2.8817E-16  3.9555E-13
  5.8943E-13 -2.1910E-13  3.4396E-15 -2.8817E-16  1.8636E-12 -2.7755E-14
 -6.6409E-13  1.0367E-12 -2.4233E-13  3.9555E-13 -2.7755E-14  4.3521E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.561117 -155.765038   -0.214976    0.009672   -0.981266  2453121.828513
# Heliocentric elements and errors
Epoch:              2453122.5000  =  2004/04/27
Mean Anomaly:           69.08917 +/-     0.031
Argument of Peri:      263.86167 +/-     0.039
Long of Asc Node:      203.24075 +/-     0.000
Inclination:            22.65908 +/-     0.000
Eccentricity:         0.24707491 +/-    0.0001
Semi-Major Axis:     39.57082408 +/-    0.0093
Time of Perihelion: 2435673.5804 +/-      10.0
Perihelion:          29.79386615 +/-    0.0077
Aphelion:            49.34778200 +/-    0.0120
Period (y)              248.9263 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -34.92961910 +/-    0.0017
Ecliptic Y          -15.95619313 +/-    0.0008
Ecliptic Z            0.36668665 +/-    0.0000
Ecliptic XDOT         0.00042742 +/-    0.0000
Ecliptic YDOT        -0.00257495 +/-    0.0000
Ecliptic ZDOT         0.00105815 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.40314330 +/-    0.0016
Geocenter to KBO     37.41866823 +/-    0.0019
# Hcoef:  7.45

The following table shows the complete astrometric record for 04HA79. 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 (04HA79) followed by the observatory code and reference code for the source of the astrometry.

2004 04  26.32777  13 30 35.93   -08 52 31.5   23.4g 04HA79    568  C~0Uqw      
2004 04  26.34900  13 30 35.83   -08 52 31.0   23.5g 04HA79    568  C~0Uqw      
2004 04  26.37536  13 30 35.69   -08 52 30.0   23.3g 04HA79    568  C~0Uqw      
2004 06  20.26453  13 27 28.81   -08 29 07.7   22.9i 04HA79    568  C~0Uqw      
2004 06  20.31329  13 27 28.73   -08 29 07.1   23.0i 04HA79    568  C~0Uqw      
2004 06  20.36533  13 27 28.66   -08 29 06.4   23.0i 04HA79    568  C~0Uqw      
2005 05  04.34296  13 36 08.38   -08 46 22.4         04HA79    568  C~0Uqw      
2005 05  04.37716  13 36 08.21   -08 46 21.3         04HA79    568  C~0Uqw      
2005 05  04.41844  13 36 08.02   -08 46 20.0         04HA79    568  C~0Uqw      
2005 05  05.38801  13 36 03.57   -08 45 49.4         04HA79    568  C~0Uqw      
2006 05  02.23299  13 42 23.36   -08 45 27.0   22.3r 04HA79    695  C~0Uqw      
2006 05  02.30778  13 42 23.02   -08 45 24.6   22.6r 04HA79    695  C~0Uqw      
2006 05  03.34439  13 42 18.16   -08 44 51.5   22.6r 04HA79    695  C~0Uqw      
2013 03  13.40930  14 26 07.30   -08 45 26.5   22.7R 04HA79    695  C~0ud8      
2013 03  13.48523  14 26 07.06   -08 45 24.4         04HA79    695  C~0ud8      
2013 03  14.48077  14 26 04.05   -08 44 57.6         04HA79    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    -0.02       0.00     0.04
  2   0.0001      0.00     0.03       0.00    -0.18
  3   0.0001      0.00    -0.14       0.00    -0.08
  4   0.1504      0.00     0.04       0.00     0.03
  5   0.1505      0.00    -0.07       0.00    -0.03
  6   0.1507      0.00     0.02       0.00    -0.02
  7   1.0213      0.00     0.33       0.00     0.04
  8   1.0214      0.00     0.19       0.00     0.04
  9   1.0215      0.00     0.24       0.00     0.02
 10   1.0241      0.00     0.14       0.00    -0.42
 11   2.0148      0.00    -0.26       0.00     0.16
 12   2.0150      0.00     0.00       0.00     0.16
 13   2.0178      0.00    -0.01       0.00     0.09
 14   8.8791      0.00    -0.05       0.00    -0.11
 15   8.8793      0.00    -0.13       0.00    -0.04
 16   8.8820      0.00     0.32       0.00    -0.00

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.

04HA79    quality flag:3

Type:           3:2E      3:2E      3:2E
Type:          6:4II     6:4II     6:4II

axisobj        39.162    39.162    39.162
ecceobj         0.246     0.246     0.246
incobj         22.771    22.771    22.771
qmin           27.667    27.672    27.663
qmax           51.645    51.647    51.644
amean          39.453    39.454    39.454
amin           39.054    39.064    39.053
amax           39.922    39.917    39.926
emean           0.256     0.256     0.256
emin            0.211     0.212     0.211
emax            0.298     0.298     0.298
imean          22.361    22.361    22.361
imin           20.943    20.943    20.942
imax           23.586    23.585    23.585
excite_mean     0.459     0.459     0.459
fracstop        1.000     1.000     1.000
cjmean          2.809     2.809     2.809

libcent 0       179.2     179.5     179.1
libamp  0        52.6      52.7      52.7
libcent 1       182.7     183.2     182.2
libamp  1       146.0     145.1     145.2
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       270.5     270.5     270.5
kozaiamp         30.2      30.2      30.2