Orbit Fit and Astrometric record for 04HL79

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: 04HL79    
# Created Sat Dec  4 02:10:01 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     17 observations of     17
# Arc:  12.09y
# First observation: 2004/04/26
#  Last observation: 2016/05/29
# Chi-squared of fit:    15.88 DOF:     28 RMS:  0.17
# Min/Max residuals:    -0.45    0.58
# Exact a, adot, b, bdot, g, gdot:
  1.539153E-05  2.492477E-02  3.829892E-06  7.479320E-03  2.560534E-02  1.327115E-03
# Covariance matrix:
  2.6499E-13 -2.9892E-14  8.6305E-15 -6.3271E-15  2.9660E-13 -7.7591E-14
 -2.9892E-14  1.0444E-13 -2.4131E-14  2.9680E-14  1.8991E-13  3.2618E-13
  8.6305E-15 -2.4131E-14  1.3761E-13 -2.3505E-14 -3.3570E-14 -8.1150E-14
 -6.3271E-15  2.9680E-14 -2.3505E-14  1.4864E-14  5.1819E-14  9.8766E-14
  2.9660E-13  1.8991E-13 -3.3570E-14  5.1819E-14  1.1592E-12  5.4969E-13
 -7.7591E-14  3.2618E-13 -8.1150E-14  9.8766E-14  5.4969E-13  1.0874E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.404866 -153.193760   -0.170857    0.024331   -0.989654  2453121.835603
# Heliocentric elements and errors
Epoch:              2453122.5000  =  2004/04/27
Mean Anomaly:           43.01989 +/-     0.060
Argument of Peri:      315.15888 +/-     0.072
Long of Asc Node:      202.48174 +/-     0.000
Inclination:            16.72876 +/-     0.000
Eccentricity:         0.07843677 +/-    0.0001
Semi-Major Axis:     42.34293211 +/-    0.0070
Time of Perihelion: 2441096.0721 +/-      17.1
Perihelion:          39.02168943 +/-    0.0072
Aphelion:            45.66417478 +/-    0.0082
Period (y)              275.5368 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.65705050 +/-    0.0015
Ecliptic Y          -18.20464178 +/-    0.0007
Ecliptic Z            0.95766456 +/-    0.0000
Ecliptic XDOT         0.00108978 +/-    0.0000
Ecliptic YDOT        -0.00244075 +/-    0.0000
Ecliptic ZDOT         0.00080309 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.04682886 +/-    0.0014
Geocenter to KBO     39.05435019 +/-    0.0016
# Hcoef:  7.52

The following table shows the complete astrometric record for 04HL79. 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 (04HL79) followed by the observatory code and reference code for the source of the astrometry.

2004 04  26.33486  13 41 32.34   -09 01 24.6   23.5g 04HL79    568  C~0VDp      
2004 04  26.35977  13 41 32.21   -09 01 24.1   24.2g 04HL79    568  C~0VDp      
2004 04  26.38244  13 41 32.10   -09 01 23.2   23.6g 04HL79    568  C~0VDp      
2004 06  20.28067  13 38 23.88   -08 40 31.5   23.8r 04HL79    568  C~0VDp      
2004 06  20.33343  13 38 23.78   -08 40 30.9         04HL79    568  C~0VDp      
2004 06  20.38203  13 38 23.71   -08 40 30.3         04HL79    568  C~0VDp      
2005 05  04.35042  13 46 58.28   -09 04 14.7   23.7r 04HL79    568  C~0VDp      
2005 05  04.38468  13 46 58.13   -09 04 13.8   23.7r 04HL79    568  C~0VDp      
2005 05  04.42866  13 46 57.91   -09 04 12.6   23.1r 04HL79    568  C~0VDp      
2005 05  05.39541  13 46 53.58   -09 03 44.4   23.3r 04HL79    568  C~0VDp      
2006 06  29.27999  13 50 03.85   -08 52 25.9   23.6r 04HL79    568  C~0VDp      
2006 06  29.29296  13 50 03.80   -08 52 25.2   24.0r 04HL79    568  C~0VDp      
2006 06  30.26046  13 50 02.79   -08 52 19.3   23.2r 04HL79    568  C~0VDp      
2009 06  22.19434  14 07 56.28   -09 10 21.2         04HL79    695  C~0VDp      
2009 06  22.25807  14 07 56.12   -09 10 20.7         04HL79    695  C~0VDp      
2016 05  29.22238  14 50 11.916  -09 41 55.29  23.4R 04HL79    G37  C~2bkb      
2016 05  29.29416  14 50 11.599  -09 41 53.96        04HL79    G37  C~2bkb      

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     0.15
     2   0.0001      0.00    -0.13       0.00    -0.11
     3   0.0001      0.00    -0.17       0.00     0.10
     4   0.1504      0.00     0.09       0.00    -0.11
     5   0.1506      0.00    -0.09       0.00    -0.12
     6   0.1507      0.00     0.06       0.00    -0.08
     7   1.0213      0.00     0.06       0.00     0.07
     8   1.0214      0.00     0.18       0.00    -0.02
     9   1.0215      0.00    -0.09       0.00    -0.10
    10   1.0241      0.00     0.12       0.00     0.07
    11   2.1737      0.00     0.06       0.00    -0.03
    12   2.1737      0.00    -0.45       0.00     0.58
    13   2.1764      0.00     0.20       0.00    -0.30
    14   5.1550      0.00     0.16       0.00     0.07
    15   5.1552      0.00    -0.14       0.00    -0.12
    16  12.0900      0.00     0.02       0.00     0.02
    17  12.0902      0.00    -0.04       0.00    -0.04

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.

04HL79    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        41.878    41.878    41.878
ecceobj         0.071     0.071     0.071
incobj         16.812    16.812    16.812
qmin           38.205    38.162    38.214
qmax           46.363    46.337    46.377
amean          42.155    42.156    42.155
amin           41.821    41.815    41.819
amax           42.504    42.501    42.508
emean           0.071     0.071     0.071
emin            0.052     0.052     0.052
emax            0.092     0.092     0.092
imean          17.362    17.362    17.362
imin           16.775    16.771    16.773
imax           18.021    18.026    18.017
excite_mean     0.307     0.307     0.307
fracstop        1.000     1.000     1.000
cjmean          2.967     2.967     2.967

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       175.6     175.7     175.7
kozaiamp        179.9     180.0     180.0