Orbit Fit and Astrometric record for 04HQ79

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: 04HQ79    
# Created Tue Oct 24 01:37:30 2017
# Orbit generated from Bernstein formalism
# Fitting   21 observations of   21
# Arc:  11.07y
# First observation: 2004/04/26
#  Last observation: 2015/05/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.002274   0.035946   0.000239  -0.004043   0.026999   0.000000
# Chi-squared of fit:    31.04 DOF:   36 RMS:  0.21
# Min/Max residuals:    -0.66    0.28
# Exact a, adot, b, bdot, g, gdot:
  2.017512E-05  3.466642E-02 -3.346955E-06 -3.891653E-03  2.812657E-02 -4.159206E-04
# Covariance matrix:
  3.1023E-13 -1.5636E-13 -1.8113E-14  1.6266E-14  1.1833E-13 -3.4393E-13
 -1.5636E-13  1.2073E-13  1.5056E-14 -1.3352E-14 -3.0437E-14  2.8138E-13
 -1.8113E-14  1.5056E-14  1.1951E-13 -1.7732E-14 -3.2345E-15  3.6691E-14
  1.6266E-14 -1.3352E-14 -1.7732E-14  6.8679E-15  3.6190E-15 -3.2556E-14
  1.1833E-13 -3.0437E-14 -3.2345E-15  3.6190E-15  3.0915E-13 -8.0487E-14
 -3.4393E-13  2.8138E-13  3.6691E-14 -3.2556E-14 -8.0487E-14  6.8616E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.934760 -151.012006   -0.133144    0.016304   -0.995595  2453121.841263
# Heliocentric elements and errors
Epoch:              2453120.5000  =  2004/04/25
Mean Anomaly:          359.54415 +/-     0.002
Argument of Peri:      173.15062 +/-     0.005
Long of Asc Node:       37.24375 +/-     0.000
Inclination:             6.46331 +/-     0.000
Eccentricity:         0.42829166 +/-    0.0001
Semi-Major Axis:     63.92969620 +/-    0.0115
Time of Perihelion: 2453356.9155 +/-       0.9
Perihelion:          36.54914059 +/-    0.0088
Aphelion:            91.31025182 +/-    0.0175
Period (y)              511.1662 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -31.90528226 +/-    0.0006
Ecliptic Y          -17.82548600 +/-    0.0003
Ecliptic Z            0.57991624 +/-    0.0000
Ecliptic XDOT         0.00166235 +/-    0.0000
Ecliptic YDOT        -0.00294201 +/-    0.0000
Ecliptic ZDOT        -0.00037930 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.55176179 +/-    0.0006
Geocenter to KBO     35.55356513 +/-    0.0007
# Hcoef:  8.10

The following table shows the complete astrometric record for 04HQ79. 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 (04HQ79) followed by the observatory code and reference code for the source of the astrometry.

2004 04  26.34052  13 49 07.64   -10 14 25.7   23.5g 04HQ79    568  C~0X5W      
2004 04  26.36686  13 49 07.52   -10 14 25.3   23.3g 04HQ79    568  C~0X5W      
2004 04  26.38811  13 49 07.40   -10 14 24.6   23.4g 04HQ79    568  C~0X5W      
2004 06  20.29694  13 45 38.23   -09 57 48.8   23.4i 04HQ79    568  C~0X5W      
2004 06  20.34855  13 45 38.13   -09 57 48.6   23.2i 04HQ79    568  C~0X5W      
2004 06  20.39724  13 45 38.04   -09 57 48.1   23.2i 04HQ79    568  C~0X5W      
2006 05  01.40343  14 03 19.25   -12 00 44.7   23.5r 04HQ79    568  C~0X5W      
2006 05  01.43386  14 03 19.08   -12 00 44.0   23.4r 04HQ79    568  C~0X5W      
2006 05  01.48652  14 03 18.81   -12 00 42.5   23.5r 04HQ79    568  C~0X5W      
2006 05  02.33945  14 03 14.47   -12 00 21.4         04HQ79    568  C~0X5W      
2006 05  26.222524 14 01 22.32   -11 51 25.6         04HQ79    645  C~1Qd2      
2006 05  26.223353 14 01 22.32   -11 51 25.6         04HQ79    645  C~1Qd2      
2006 05  26.225841 14 01 22.31   -11 51 25.5         04HQ79    645  C~1Qd2      
2006 06  29.27445  13 59 44.02   -11 44 15.9   23.6r 04HQ79    568  C~0X5W      
2006 06  29.28739  13 59 44.01   -11 44 16.1   23.9r 04HQ79    568  C~0X5W      
2006 06  30.25492  13 59 42.68   -11 44 11.8   23.3r 04HQ79    568  C~0X5W      
2007 02  21.46236  14 15 19.26   -13 15 19.5   23.3R 04HQ79    675  C~0X5W      
2007 02  21.50974  14 15 19.20   -13 15 19.1   23.1R 04HQ79    675  C~0X5W      
2015 05  20.05401  15 08 57.89   -19 13 49.2         04HQ79    W84  C~1Tii      
2015 05  21.06141  15 08 52.59   -19 13 30.0   23.8V 04HQ79    W84  C~1Tii      
2015 05  24.05296  15 08 36.96   -19 12 32.8         04HQ79    W84  C~1Tii      

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    -0.14       0.00     0.24
  2   0.0001     -1.80     0.17      -0.25     0.06
  3   0.0001     -3.70    -0.03      -0.22     0.16
  4   0.1505  -3245.22     0.04    -165.28     0.25
  5   0.1506  -3246.68     0.09    -165.62     0.11
  6   0.1507  -3248.10     0.06    -165.63     0.28
  7   2.0125  13991.81     0.07   -1619.17     0.09
  8   2.0126  13989.22    -0.08   -1619.36    -0.02
  9   2.0127  13984.96    -0.10   -1619.31     0.18
 10   2.0151  13917.61    -0.34   -1621.28     0.18
 11   2.0804  12180.81    -0.04   -1682.60    -0.66
 12   2.0804  12180.81     0.01   -1682.60    -0.66
 13   2.0805  12180.64     0.00   -1682.55    -0.61
 14   2.1737  10673.14    -0.06   -1776.47     0.21
 15   2.1737  10673.07     0.16   -1776.71     0.01
 16   2.1764  10653.20    -0.01   -1779.42     0.07
 17   2.8231  25530.42    -0.02   -2287.71    -0.17
 18   2.8232  25529.45     0.21   -2287.62     0.02
 19  11.0629  79748.09    -0.02   -9215.85     0.09
 20  11.0656  79659.00     0.10   -9216.93     0.03
 21  11.0738  79396.22    -0.06   -9219.58     0.12

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.

04HQ79    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        62.639    62.672    62.607
ecceobj         0.417     0.417     0.416
incobj          6.488     6.488     6.488
qmin           35.743    35.764    35.753
qmax           92.453    92.499    92.273
amean          63.321    63.360    63.288
amin           62.340    62.436    62.414
amax           64.497    64.504    64.387
emean           0.423     0.423     0.422
emin            0.411     0.411     0.411
emax            0.434     0.435     0.434
imean           5.652     5.667     5.642
imin            5.125     5.138     5.121
imax            6.317     6.290     6.327
excite_mean     0.434     0.434     0.433
fracstop        1.000     1.000     1.000
cjmean          3.091     3.091     3.091

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       187.0     182.6     184.2
kozaiamp        179.9     180.0     180.0