Orbit Fit and Astrometric record for 04HB79

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: 04HB79    
# Created Wed Dec 13 02:37:20 2017
# Orbit generated from Bernstein formalism
# Fitting   15 observations of   15
# Arc:  10.17y
# First observation: 2004/04/26
#  Last observation: 2014/06/28
Preliminary a, adot, b, bdot, g, gdot:
  -0.001361   0.041999   0.000129  -0.001586   0.035413   0.000000
# Chi-squared of fit:    20.73 DOF:   24 RMS:  0.21
# Min/Max residuals:    -0.50    0.44
# Exact a, adot, b, bdot, g, gdot:
  1.883294E-05  3.868108E-02 -4.625624E-07 -1.457800E-03  3.228555E-02 -5.500970E-03
# Covariance matrix:
  2.9653E-13 -1.0819E-13 -1.2996E-15  4.6091E-15  2.5656E-13 -2.6394E-13
 -1.0819E-13  2.8064E-13  8.6962E-15 -1.0514E-14  2.6547E-13  6.1049E-13
 -1.2996E-15  8.6962E-15  1.3869E-13 -1.8571E-14  1.2655E-14  1.8690E-14
  4.6091E-15 -1.0514E-14 -1.8571E-14  8.1749E-15 -7.1665E-15 -2.4080E-14
  2.5656E-13  2.6547E-13  1.2655E-14 -7.1665E-15  1.1795E-12  4.2598E-13
 -2.6394E-13  6.1049E-13  1.8690E-14 -2.4080E-14  4.2598E-13  1.3964E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.588080 -152.999337   -0.167497    0.027512   -0.990144  2453121.835603
# Heliocentric elements and errors
Epoch:              2453120.5000  =  2004/04/25
Mean Anomaly:          332.93231 +/-     0.012
Argument of Peri:      187.63433 +/-     0.016
Long of Asc Node:       62.63177 +/-     0.001
Inclination:             2.65919 +/-     0.000
Eccentricity:         0.23118170 +/-    0.0001
Semi-Major Axis:     39.48158723 +/-    0.0066
Time of Perihelion: 2459933.5106 +/-       2.4
Perihelion:          30.35416669 +/-    0.0063
Aphelion:            48.60900777 +/-    0.0089
Period (y)              248.0848 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -28.39702038 +/-    0.0009
Ecliptic Y          -14.65403706 +/-    0.0005
Ecliptic Z            0.85839463 +/-    0.0000
Ecliptic XDOT         0.00189865 +/-    0.0000
Ecliptic YDOT        -0.00271945 +/-    0.0000
Ecliptic ZDOT        -0.00013638 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.96667656 +/-    0.0009
Geocenter to KBO     30.97360532 +/-    0.0010
# Hcoef:  8.87

The following table shows the complete astrometric record for 04HB79. 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 (04HB79) followed by the observatory code and reference code for the source of the astrometry.

2004 04  26.33486  13 42 32.40   -08 55 20.3   23.5g 04HB79    568  C~0Uqw      
2004 04  26.35977  13 42 32.25   -08 55 19.7   23.7g 04HB79    568  C~0Uqw      
2004 04  26.38244  13 42 32.12   -08 55 18.7   23.7g 04HB79    568  C~0Uqw      
2004 06  20.28067  13 38 40.22   -08 35 41.0         04HB79    568  C~0Uqw      
2004 06  20.33343  13 38 40.12   -08 35 40.7         04HB79    568  C~0Uqw      
2004 06  20.38203  13 38 40.00   -08 35 40.4         04HB79    568  C~0Uqw      
2005 05  04.35414  13 50 07.86   -09 43 46.9         04HB79    568  C~0Uqw      
2005 05  04.38840  13 50 07.66   -09 43 45.8         04HB79    568  C~0Uqw      
2005 05  04.43238  13 50 07.42   -09 43 44.4   23.6r 04HB79    568  C~0Uqw      
2005 05  05.39915  13 50 01.95   -09 43 15.4         04HB79    568  C~0Uqw      
2006 06  29.27814  13 54 51.79   -10 18 08.5   24.2r 04HB79    568  C~0Uqw      
2006 06  29.29108  13 54 51.76   -10 18 08.1   24.3r 04HB79    568  C~0Uqw      
2006 06  30.25862  13 54 50.38   -10 18 04.6   23.8r 04HB79    568  C~0Uqw      
2014 06  28.19903  15 05 56.19   -16 50 37.6   23.6R 04HB79    G37  C~16WI      
2014 06  28.26004  15 05 56.01   -16 50 36.1         04HB79    G37  C~16WI      

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    -0.05
  2   0.0001     -2.29     0.03      -0.24    -0.24
  3   0.0001     -4.45    -0.04       0.00     0.05
  4   0.1504  -3636.23     0.02    -138.81     0.10
  5   0.1506  -3637.72     0.13    -139.07     0.06
  6   0.1507  -3639.49    -0.18    -139.43    -0.12
  7   1.0213   7337.81     0.10    -314.03    -0.18
  8   1.0214   7334.65     0.03    -314.05    -0.11
  9   1.0215   7330.83     0.19    -314.00     0.04
 10   1.0241   7244.83    -0.33    -315.48     0.16
 11   2.1737  11999.59     0.15    -767.85     0.15
 12   2.1737  11999.04    -0.10    -767.63     0.42
 13   2.1764  11978.67    -0.03    -771.49    -0.20
 14  10.1707  82389.14    -0.33   -3444.43    -0.50
 15  10.1709  82385.77     0.32   -3443.66     0.44

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.

04HB79    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.007    39.026    38.988
ecceobj         0.225     0.225     0.224
incobj          2.665     2.665     2.665
qmin           29.517    29.506    29.476
qmax           50.002    49.981    49.961
amean          39.456    39.456    39.456
amin           38.991    39.021    38.969
amax           39.998    39.967    40.006
emean           0.236     0.235     0.237
emin            0.220     0.217     0.220
emax            0.252     0.252     0.252
imean           1.503     1.826     0.987
imin            0.774     0.774     0.320
imax            2.604     3.102     1.912
excite_mean     0.237     0.238     0.237
fracstop        1.000     1.000     1.000
cjmean          2.987     2.987     2.987

libcent 0       180.1     180.2     180.2
libamp  0        85.7      78.1      94.7
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       167.5     151.8     192.6
kozaiamp        179.9     179.7     179.8