Orbit Fit and Astrometric record for 04KH19

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: 04KH19    
# Created Sat Dec 16 02:37:22 2017
# Orbit generated from Bernstein formalism
# Fitting   23 observations of   23
# Arc:  12.04y
# First observation: 2004/05/24
#  Last observation: 2016/06/08
Preliminary a, adot, b, bdot, g, gdot:
  -0.000039   0.017501  -0.000089   0.012346   0.023417   0.000000
# Chi-squared of fit:    20.19 DOF:   40 RMS:  0.17
# Min/Max residuals:    -0.31    0.41
# Exact a, adot, b, bdot, g, gdot:
  1.105259E-05  1.756086E-02  8.996774E-06  1.237088E-02  2.347282E-02  1.941436E-03
# Covariance matrix:
  1.7729E-13 -7.1430E-14  4.8157E-14 -4.2032E-14  4.9862E-14 -2.7551E-13
 -7.1430E-14  5.5067E-14 -4.1905E-14  3.6469E-14  8.4936E-15  2.3867E-13
  4.8157E-14 -4.1905E-14  1.4116E-13 -4.4026E-14 -2.7163E-15 -1.9804E-13
 -4.2032E-14  3.6469E-14 -4.4026E-14  3.0843E-14  9.5152E-16  1.7243E-13
  4.9862E-14  8.4936E-15 -2.7163E-15  9.5152E-16  6.9247E-13  1.1934E-15
 -2.7551E-13  2.3867E-13 -1.9804E-13  1.7243E-13  1.1934E-15  1.1288E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.896759 -129.985787   -0.239748   -0.032517   -0.983451  2453149.863713
# Heliocentric elements and errors
Epoch:              2453140.5000  =  2004/05/15
Mean Anomaly:          118.39502 +/-     0.060
Argument of Peri:      227.36224 +/-     0.046
Long of Asc Node:      232.95331 +/-     0.000
Inclination:            35.20412 +/-     0.000
Eccentricity:         0.11742769 +/-    0.0001
Semi-Major Axis:     40.90135418 +/-    0.0053
Time of Perihelion: 2421718.3515 +/-      14.7
Perihelion:          36.09840252 +/-    0.0053
Aphelion:            45.70430583 +/-    0.0064
Period (y)              261.5861 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -27.81343150 +/-    0.0010
Ecliptic Y          -33.53073468 +/-    0.0012
Ecliptic Z           -1.40967160 +/-    0.0001
Ecliptic XDOT         0.00139060 +/-    0.0000
Ecliptic YDOT        -0.00153320 +/-    0.0000
Ecliptic ZDOT         0.00143477 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.58766240 +/-    0.0011
Geocenter to KBO     42.60247194 +/-    0.0015
# Hcoef:  6.49

The following table shows the complete astrometric record for 04KH19. 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 (04KH19) followed by the observatory code and reference code for the source of the astrometry.

2004 05  24.36297  15 08 07.00   -19 34 16.5   22.8g 04KH19    568  C~0VDq      
2004 05  24.38613  15 08 06.90   -19 34 15.9   22.9g 04KH19    568  C~0VDq      
2004 05  24.41052  15 08 06.77   -19 34 15.3   22.5g 04KH19    568  C~0VDq      
2004 05  25.37186  15 08 02.31   -19 33 49.8         04KH19    568  C~0VDq      
2005 05  14.38834  15 13 50.28   -19 13 56.7   22.8r 04KH19    568  C~0VDq      
2005 05  14.42207  15 13 50.12   -19 13 55.9   22.8r 04KH19    568  C~0VDq      
2005 05  14.46085  15 13 49.92   -19 13 55.0   22.8r 04KH19    568  C~0VDq      
2005 05  17.35805  15 13 36.07   -19 12 39.6   22.6r 04KH19    568  C~0VDq      
2005 05  17.36303  15 13 36.04   -19 12 39.4   22.8r 04KH19    568  C~0VDq      
2005 08  02.02947  15 09 47.60   -18 47 15.9         04KH19    309  C~0VDq      
2005 08  03.02896  15 09 47.52   -18 47 07.0         04KH19    309  C~0VDq      
2005 08  03.03393  15 09 47.52   -18 47 06.9         04KH19    309  C~0VDq      
2006 05  26.37704  15 17 47.14   -18 43 48.3   22.8r 04KH19    568  C~0VDq      
2006 05  26.41049  15 17 47.00   -18 43 47.3   23.0r 04KH19    568  C~0VDq      
2006 05  26.44397  15 17 46.82   -18 43 46.4   23.0r 04KH19    568  C~0VDq      
2006 05  27.45448  15 17 42.17   -18 43 21.9         04KH19    568  C~0VDq      
2008 06  08.04061  15 26 25.00   -17 47 28.7   22.0R 04KH19    807  C~0VDq      
2008 06  08.08634  15 26 24.78   -17 47 27.6         04KH19    807  C~0VDq      
2008 06  08.14832  15 26 24.52   -17 47 26.3         04KH19    807  C~0VDq      
2009 04  23.61690  15 34 40.23   -17 39 09.6         04KH19    568  C~0VDq      
2016 06  08.18138  16 03 10.721  -14 10 24.23  22.4R 04KH19    G37              
2016 06  08.21976  16 03 10.543  -14 10 23.51        04KH19    G37              
2016 06  08.26093  16 03 10.362  -14 10 22.84        04KH19    G37              

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     0.16       0.00    -0.14
  2   0.0001     -1.52     0.29       0.19    -0.11
  3   0.0001     -3.45     0.10       0.27    -0.21
  4   0.0028    -71.05    -0.17       7.71    -0.10
  5   0.9720   4354.90    -0.02    2474.01     0.00
  6   0.9721   4352.51     0.07    2474.19    -0.05
  7   0.9722   4349.54    -0.05    2474.31    -0.19
  8   0.9801   4140.33    -0.06    2495.34     0.25
  9   0.9802   4139.87    -0.15    2495.42     0.30
 10   1.1901    610.40    -0.01    3100.97    -0.17
 11   1.1928    606.91     0.05    3109.24    -0.16
 12   1.1928    606.88     0.04    3109.34    -0.10
 13   2.0041   7130.60    -0.20    5098.15     0.19
 14   2.0042   7128.42     0.00    5098.60     0.41
 15   2.0043   7125.71    -0.31    5098.81     0.39
 16   2.0071   7055.47     0.27    5105.41    -0.20
 17   4.0402  13441.93     0.08   10248.84     0.05
 18   4.0403  13438.59    -0.22   10249.13     0.06
 19   4.0405  13434.65    -0.06   10249.47     0.03
 20   4.9151  20249.74     0.12   12467.98    -0.18
 21  12.0406  42359.31     0.01   30674.22    -0.06
 22  12.0407  42356.49    -0.03   30674.37    -0.01
 23  12.0408  42353.63     0.09   30674.45    -0.02

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.

04KH19    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        40.595    40.611    40.579
ecceobj         0.119     0.119     0.119
incobj         35.344    35.344    35.344
qmin           35.261    35.281    35.225
qmax           46.640    46.667    46.614
amean          40.819    40.824    40.795
amin           40.505    40.509    40.455
amax           41.171    41.172    41.154
emean           0.118     0.118     0.118
emin            0.104     0.103     0.104
emax            0.133     0.134     0.134
imean          36.282    36.279    36.280
imin           35.953    35.952    35.956
imax           36.584    36.594    36.594
excite_mean     0.603     0.603     0.603
fracstop        1.000     1.000     1.000
cjmean          2.601     2.601     2.601

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       185.8     186.1     187.4
kozaiamp        179.9     180.0     179.9