Orbit Fit and Astrometric record for 04HN79

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: 04HN79    
# Created Wed Oct 17 01:08:24 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   25 observations of   25
# Arc:  11.88y
# First observation: 2004/04/26
#  Last observation: 2016/03/13
# Chi-squared of fit:    26.53 DOF:   44 RMS:  0.18
# Min/Max residuals:    -0.55    0.40
# Exact a, adot, b, bdot, g, gdot:
  1.746323E-05  2.978558E-02 -1.817250E-06 -6.102892E-03  2.747844E-02 -4.498749E-03
# Covariance matrix:
  1.5462E-13 -4.1730E-14 -5.1250E-15  5.2019E-15  7.9978E-14 -6.9545E-14
 -4.1730E-14  6.1676E-14  1.3346E-14 -1.2767E-14  1.2424E-13  1.6750E-13
 -5.1250E-15  1.3346E-14  1.0450E-13 -1.5097E-14  3.4484E-14  3.8905E-14
  5.2019E-15 -1.2767E-14 -1.5097E-14  6.0672E-15 -3.1873E-14 -3.7100E-14
  7.9978E-14  1.2424E-13  3.4484E-14 -3.1873E-14  7.9826E-13  4.1330E-13
 -6.9545E-14  1.6750E-13  3.8905E-14 -3.7100E-14  4.1330E-13  4.8622E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.469074 -154.413163   -0.191837    0.025342   -0.985774  2453121.832763
# Heliocentric elements and errors
Epoch:              2453122.5000  =  2004/04/27
Mean Anomaly:          331.76321 +/-     0.011
Argument of Peri:      217.74528 +/-     0.013
Long of Asc Node:       32.83000 +/-     0.000
Inclination:            11.65220 +/-     0.000
Eccentricity:         0.23231990 +/-    0.0001
Semi-Major Axis:     46.02246987 +/-    0.0077
Time of Perihelion: 2462067.2087 +/-      26.4
Perihelion:          35.33053445 +/-    0.0073
Aphelion:            56.71440528 +/-    0.0104
Period (y)              312.2217 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -33.62258653 +/-    0.0011
Ecliptic Y          -16.30924282 +/-    0.0005
Ecliptic Z            0.93294988 +/-    0.0000
Ecliptic XDOT         0.00166879 +/-    0.0000
Ecliptic YDOT        -0.00249683 +/-    0.0000
Ecliptic ZDOT        -0.00061923 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.38110230 +/-    0.0010
Geocenter to KBO     36.39230117 +/-    0.0012
# Hcoef:  7.11

The following table shows the complete astrometric record for 04HN79. 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 (04HN79) followed by the observatory code and reference code for the source of the astrometry.

2004 04  26.33202  13 37 01.92   -08 31 24.2   22.7g 04HN79    568  C~0WzG      
2004 04  26.35319  13 37 01.81   -08 31 23.9   22.6g 04HN79    568  C~0WzG      
2004 04  26.37961  13 37 01.68   -08 31 23.1   22.6g 04HN79    568  C~0WzG      
2004 04  27.32697  13 36 56.95   -08 30 59.2   22.6g 04HN79    568  C~0WzG      
2004 06  20.27381  13 33 39.40   -08 16 33.3   22.3i 04HN79    568  C~0WzG      
2004 06  20.32279  13 33 39.32   -08 16 33.1   22.2i 04HN79    568  C~0WzG      
2004 06  20.37510  13 33 39.22   -08 16 33.1   22.6i 04HN79    568  C~0WzG      
2005 05  04.34669  13 42 21.48   -09 25 05.8   22.6r 04HN79    568  C~0WzG      
2005 05  04.38095  13 42 21.30   -09 25 05.0   22.6r 04HN79    568  C~0WzG      
2005 05  04.42217  13 42 21.09   -09 25 03.9   22.4r 04HN79    568  C~0WzG      
2005 05  05.39171  13 42 16.36   -09 24 41.1   22.6r 04HN79    568  C~0WzG      
2006 05  01.39587  13 48 40.65   -10 23 20.1   22.5r 04HN79    568  C~0WzG      
2006 05  01.42624  13 48 40.49   -10 23 19.4   22.4r 04HN79    568  C~0WzG      
2006 05  01.45796  13 48 40.32   -10 23 18.9         04HN79    568  C~0WzG      
2006 05  02.19937  13 48 36.57   -10 23 00.6   22.5r 04HN79    695  C~0WzG      
2006 05  02.26888  13 48 36.21   -10 22 58.9   22.5r 04HN79    695  C~0WzG      
2006 05  02.33204  13 48 35.89   -10 22 57.4         04HN79    568  C~0WzG      
2009 06  21.15807  14 03 48.76   -12 58 23.8         04HN79    695  C~0WzG      
2009 06  22.15815  14 03 46.36   -12 58 14.2         04HN79    695  C~0WzG      
2009 06  22.27140  14 03 46.09   -12 58 13.5         04HN79    695  C~0WzG      
2014 04  30.21284  14 40 32.00   -17 54 33.5         04HN79    W84  C~2fbn      
2014 04  30.28415  14 40 31.59   -17 54 32.0   22.9V 04HN79    W84  C~2fbn      
2014 05  01.20025  14 40 26.50   -17 54 12.6         04HN79    W84  C~2fbn      
2016 03  13.41344  14 58 08.00   -19 53 07.1   22.1R 04HN79    G37  C~1pPj      
2016 03  13.50398  14 58 07.73   -19 53 06.8         04HN79    G37  C~1pPj      

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    -0.13       0.00    -0.32
  2   0.0001      0.00    -0.16       0.00    -0.55
  3   0.0001      0.00    -0.08       0.00    -0.40
  4   0.0027      0.00     0.25       0.00    -0.02
  5   0.1504      0.00    -0.13       0.00     0.08
  6   0.1506      0.00    -0.03       0.00     0.09
  7   0.1507      0.00    -0.17       0.00    -0.12
  8   1.0213      0.00     0.28       0.00     0.08
  9   1.0214      0.00     0.15       0.00     0.07
 10   1.0215      0.00     0.10       0.00     0.19
 11   1.0241      0.00     0.32       0.00     0.16
 12   2.0125      0.00     0.18       0.00     0.11
 13   2.0126      0.00     0.14       0.00     0.07
 14   2.0127      0.00     0.05       0.00    -0.20
 15   2.0147      0.00    -0.02       0.00     0.16
 16   2.0149      0.00    -0.06       0.00     0.18
 17   2.0151      0.00    -0.15       0.00     0.11
 18   5.1522      0.00     0.40       0.00     0.11
 19   5.1549      0.00     0.04       0.00     0.35
 20   5.1552      0.00     0.07       0.00     0.01
 21  10.0093      0.00     0.07       0.00    -0.13
 22  10.0095      0.00    -0.03       0.00    -0.15
 23  10.0120      0.00     0.01       0.00    -0.20
 24  11.8798      0.00     0.06       0.00     0.01
 25  11.8800      0.00    -0.06       0.00    -0.01

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.

04HN79    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        45.439    45.439    45.439
ecceobj         0.226     0.226     0.226
incobj         11.703    11.703    11.703
qmin           34.775    34.775    34.682
qmax           57.360    57.359    57.387
amean          45.782    45.783    45.783
amin           45.333    45.344    45.320
amax           46.324    46.327    46.308
emean           0.228     0.227     0.228
emin            0.213     0.216     0.212
emax            0.239     0.239     0.241
imean          11.005    11.067    11.035
imin           10.158    10.432    10.307
imax           11.617    11.655    11.977
excite_mean     0.297     0.297     0.298
fracstop        1.000     1.000     1.000
cjmean          3.014     3.014     3.014

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       180.9     178.8     186.5
kozaiamp        179.9     180.0     179.9