Orbit Fit and Astrometric record for 04HC79

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: 04HC79    
# Created Sun Oct 21 01:08:19 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   21 observations of   21
# Arc:  12.10y
# First observation: 2004/04/22
#  Last observation: 2016/05/29
# Chi-squared of fit:    36.11 DOF:   36 RMS:  0.23
# Min/Max residuals:    -0.41    0.49
# Exact a, adot, b, bdot, g, gdot:
  1.461695E-05  2.855534E-02  1.916411E-07 -6.788717E-04  2.632419E-02  4.383251E-04
# Covariance matrix:
  2.0423E-13 -3.5784E-14 -4.4431E-16  6.9359E-16  1.9037E-13 -8.5832E-14
 -3.5784E-14  7.9941E-14  1.5214E-15 -1.8023E-15  9.1754E-14  2.1816E-13
 -4.4431E-16  1.5214E-15  9.9920E-14 -1.2876E-14  1.9274E-15  4.4493E-15
  6.9359E-16 -1.8023E-15 -1.2876E-14  5.4657E-15 -1.9076E-15 -5.3031E-15
  1.9037E-13  9.1754E-14  1.9274E-15 -1.9076E-15  6.0430E-13  2.2669E-13
 -8.5832E-14  2.1816E-13  4.4493E-15 -5.3031E-15  2.2669E-13  6.4227E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.510515 -131.272802    0.273414    0.008645   -0.965356  2453118.056943
# Heliocentric elements and errors
Epoch:              2453118.5000  =  2004/04/23
Mean Anomaly:            3.06596 +/-     0.008
Argument of Peri:      155.50405 +/-     0.012
Long of Asc Node:       68.48247 +/-     0.002
Inclination:             1.44421 +/-     0.000
Eccentricity:         0.16429172 +/-    0.0001
Semi-Major Axis:     46.59462488 +/-    0.0066
Time of Perihelion: 2452129.1118 +/-       2.7
Perihelion:          38.93951374 +/-    0.0070
Aphelion:            54.24973602 +/-    0.0088
Period (y)              318.0621 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -25.90324739 +/-    0.0007
Ecliptic Y          -29.09318583 +/-    0.0008
Ecliptic Z            0.33851419 +/-    0.0000
Ecliptic XDOT         0.00219859 +/-    0.0000
Ecliptic YDOT        -0.00200074 +/-    0.0000
Ecliptic ZDOT        -0.00007007 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.95517603 +/-    0.0008
Geocenter to KBO     37.98789440 +/-    0.0011
# Hcoef:  7.38

The following table shows the complete astrometric record for 04HC79. 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 (04HC79) followed by the observatory code and reference code for the source of the astrometry.

2004 04  22.55620  15 05 40.04   -16 54 15.4   23.6g 04HC79    568  C~0VDp      
2004 04  24.43121  15 05 30.82   -16 53 37.8   23.2g 04HC79    568  C~0VDp      
2004 04  24.45738  15 05 30.69   -16 53 37.5   23.6g 04HC79    568  C~0VDp      
2004 04  25.43696  15 05 25.85   -16 53 17.3   23.3g 04HC79    568  C~0VDp      
2004 04  25.46393  15 05 25.71   -16 53 16.8   23.2g 04HC79    568  C~0VDp      
2004 04  25.48658  15 05 25.60   -16 53 16.5   23.5g 04HC79    568  C~0VDp      
2004 07  08.26697  15 00 12.87   -16 32 29.1   22.9i 04HC79    568  C~0VDp      
2004 07  08.32980  15 00 12.76   -16 32 28.5   22.8i 04HC79    568  C~0VDp      
2004 07  08.39142  15 00 12.61   -16 32 28.2   23.1i 04HC79    568  C~0VDp      
2005 05  08.42445  15 10 54.81   -17 17 55.2   22.8r 04HC79    568  C~0VDp      
2005 05  08.45631  15 10 54.64   -17 17 54.6   22.8r 04HC79    568  C~0VDp      
2005 05  08.48812  15 10 54.47   -17 17 53.9   22.8r 04HC79    568  C~0VDp      
2005 05  10.48106  15 10 44.24   -17 17 13.8   22.7r 04HC79    568  C~0VDp      
2006 06  03.39463  15 15 20.72   -17 38 00.3         04HC79    568  C~0VDp      
2006 06  03.41037  15 15 20.63   -17 37 59.9         04HC79    568  C~0VDp      
2006 06  03.42683  15 15 20.57   -17 37 59.7         04HC79    568  C~0VDp      
2008 06  08.04634  15 28 09.81   -18 30 50.0   22.7R 04HC79    807  C~0VDp      
2008 06  08.09926  15 28 09.57   -18 30 49.1   22.4R 04HC79    807  C~0VDp      
2008 06  08.15584  15 28 09.29   -18 30 48.1   22.3R 04HC79    807  C~0VDp      
2016 05  29.33350  16 22 39.138  -21 31 46.94  22.6R 04HC79    G37  C~2bkb      
2016 05  29.38914  16 22 38.838  -21 31 46.26        04HC79    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     0.49       0.00    -0.26
  2   0.0051      0.00     0.00       0.00    -0.02
  3   0.0052      0.00     0.02       0.00    -0.24
  4   0.0079      0.00     0.07       0.00     0.28
  5   0.0080      0.00     0.01       0.00     0.24
  6   0.0080      0.00     0.08       0.00     0.09
  7   0.2100      0.00    -0.27       0.00    -0.27
  8   0.2102      0.00     0.12       0.00    -0.15
  9   0.2104      0.00    -0.15       0.00    -0.34
 10   1.0428      0.00    -0.23       0.00     0.25
 11   1.0428      0.00    -0.28       0.00     0.21
 12   1.0429      0.00    -0.33       0.00     0.27
 13   1.0484      0.00     0.06       0.00     0.31
 14   2.1132      0.00     0.02       0.00    -0.41
 15   2.1132      0.00    -0.19       0.00    -0.29
 16   2.1133      0.00     0.10       0.00    -0.38
 17   4.1273      0.00     0.07       0.00     0.24
 18   4.1274      0.00     0.25       0.00     0.29
 19   4.1276      0.00     0.10       0.00     0.38
 20  12.1007      0.00    -0.05       0.00    -0.11
 21  12.1008      0.00    -0.02       0.00    -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.

04HC79    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.075    46.075    46.075
ecceobj         0.155     0.155     0.155
incobj          1.448     1.448     1.448
qmin           38.433    38.436    38.436
qmax           54.973    55.019    54.950
amean          46.471    46.469    46.470
amin           46.066    46.066    46.066
amax           46.943    46.954    46.933
emean           0.156     0.156     0.156
emin            0.142     0.142     0.142
emax            0.171     0.172     0.171
imean           0.969     0.969     0.969
imin            0.259     0.259     0.259
imax            1.497     1.495     1.495
excite_mean     0.157     0.157     0.157
fracstop        1.000     1.000     1.000
cjmean          3.101     3.101     3.101

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       171.5     171.5     171.6
kozaiamp        180.0     180.0     180.0