Orbit Fit and Astrometric record for 04KZ18

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: 04KZ18    
# Created Mon Oct 23 01:37:30 2017
# Orbit generated from Bernstein formalism
# Fitting   18 observations of   18
# Arc:  11.05y
# First observation: 2004/05/24
#  Last observation: 2015/06/12
Preliminary a, adot, b, bdot, g, gdot:
  -0.001344   0.036918  -0.000640   0.015479   0.027694   0.000000
# Chi-squared of fit:    22.56 DOF:   30 RMS:  0.20
# Min/Max residuals:    -0.54    0.34
# Exact a, adot, b, bdot, g, gdot:
  1.845966E-05  3.463937E-02  7.799774E-06  1.445641E-02  2.989510E-02 -2.266522E-03
# Covariance matrix:
  1.8609E-13 -1.3247E-13  2.9693E-14 -5.1890E-14  5.1924E-14 -2.9295E-13
 -1.3247E-13  2.2594E-13 -5.5571E-14  9.7071E-14 -1.7162E-13  5.4872E-13
  2.9693E-14 -5.5571E-14  1.3415E-13 -3.7005E-14  5.2443E-14 -1.3799E-13
 -5.1890E-14  9.7071E-14 -3.7005E-14  4.6394E-14 -9.0884E-14  2.4098E-13
  5.1924E-14 -1.7162E-13  5.2443E-14 -9.0884E-14  1.4725E-12 -5.2611E-13
 -2.9295E-13  5.4872E-13 -1.3799E-13  2.4098E-13 -5.2611E-13  1.3631E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.084099 -128.432094   -0.213051   -0.001402   -0.990112  2453149.867903
# Heliocentric elements and errors
Epoch:              2453140.5000  =  2004/05/15
Mean Anomaly:          355.50910 +/-     0.004
Argument of Peri:       10.65114 +/-     0.009
Long of Asc Node:      232.11104 +/-     0.000
Inclination:            22.63379 +/-     0.000
Eccentricity:         0.38481009 +/-    0.0002
Semi-Major Axis:     55.70727069 +/-    0.0183
Time of Perihelion: 2455035.0117 +/-       1.5
Perihelion:          34.27055059 +/-    0.0149
Aphelion:            77.14399080 +/-    0.0272
Period (y)              415.7919 +/-      0.21
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -21.24422874 +/-    0.0008
Ecliptic Y          -27.10965537 +/-    0.0011
Ecliptic Z           -0.04880767 +/-    0.0000
Ecliptic XDOT         0.00261018 +/-    0.0000
Ecliptic YDOT        -0.00181777 +/-    0.0000
Ecliptic ZDOT         0.00132437 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.44202450 +/-    0.0010
Geocenter to KBO     33.45029868 +/-    0.0014
# Hcoef:  8.51

The following table shows the complete astrometric record for 04KZ18. 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 (04KZ18) followed by the observatory code and reference code for the source of the astrometry.

2004 05  24.36716  15 16 29.14   -18 14 12.1   24.1r 04KZ18    568  C~0D3B      
2004 05  24.39224  15 16 28.99   -18 14 11.3   24.1r 04KZ18    568  C~0D3B      
2004 05  24.41476  15 16 28.87   -18 14 10.6   23.1r 04KZ18    568  C~0D3B      
2004 05  25.37607  15 16 23.59   -18 13 41.9   24.0r 04KZ18    568  C~0D3B      
2004 06  10.29914  15 15 01.76   -18 06 11.3   23.6i 04KZ18    568  C~0X5W      
2004 06  10.36907  15 15 01.43   -18 06 09.4   23.4i 04KZ18    568  C~0X5W      
2004 06  10.43312  15 15 01.12   -18 06 07.8   23.4i 04KZ18    568  C~0X5W      
2005 05  08.43948  15 26 59.86   -18 04 14.2   23.4r 04KZ18    568  C~0X5W      
2005 05  08.47120  15 26 59.67   -18 04 13.3   23.5r 04KZ18    568  C~0X5W      
2005 05  08.50317  15 26 59.49   -18 04 12.3   23.3r 04KZ18    568  C~0X5W      
2005 05  10.49592  15 26 48.25   -18 03 14.7         04KZ18    568  C~0X5W      
2006 05  02.41527  15 36 34.68   -17 47 33.1   22.8r 04KZ18    695  C~0X5W      
2006 05  02.45749  15 36 34.46   -17 47 31.9   22.9r 04KZ18    695  C~0X5W      
2006 06  30.26641  15 31 31.58   -17 22 23.6   23.8r 04KZ18    568  C~0X5W      
2015 06  12.19488  16 52 10.54   -13 32 14.1   23.0R 04KZ18    695  C~1hTc      
2015 06  12.24220  16 52 10.23   -13 32 13.1         04KZ18    695  C~1hTc      
2015 06  12.29545  16 52 09.93   -13 32 12.5         04KZ18    695  C~1hTc      
2015 06  12.33020  16 52 09.75   -13 32 12.0         04KZ18    695  C~1hTc      

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    -0.03       0.00    -0.03
  2   0.0001     -2.27    -0.18       0.22    -0.01
  3   0.0001     -4.10    -0.10       0.45     0.05
  4   0.0028    -84.21    -0.54       8.57     0.28
  5   0.0464  -1327.73     0.14     138.71    -0.02
  6   0.0465  -1332.76     0.27     139.31     0.04
  7   0.0467  -1337.45     0.31     139.69    -0.09
  8   0.9557   8550.29     0.02    2858.31     0.19
  9   0.9558   8547.44    -0.09    2858.51     0.14
 10   0.9559   8544.70    -0.06    2858.85     0.22
 11   0.9613   8374.85    -0.02    2875.11    -0.05
 12   1.9385  16305.51     0.12    5812.96    -0.29
 13   1.9386  16302.15     0.30    5813.39    -0.22
 14   2.0997  11714.17    -0.09    6246.85    -0.32
 15  11.0495  82324.14     0.34   35189.99    -0.02
 16  11.0496  82318.73    -0.34   35190.19     0.18
 17  11.0498  82313.55    -0.20   35189.97    -0.04
 18  11.0499  82310.42     0.15   35190.00    -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.

04KZ18    quality flag:3

Type:         5:2EEE    5:2EEE    5:2EEE
Type:         5:2EII    5:2EII    5:2EII

axisobj        54.968    55.021    54.916
ecceobj         0.377     0.378     0.377
incobj         22.703    22.703    22.703
qmin           33.484    33.773    33.446
qmax           78.363    78.209    78.430
amean          55.461    55.461    55.461
amin           54.882    54.858    54.901
amax           56.220    56.259    56.220
emean           0.381     0.373     0.382
emin            0.370     0.360     0.370
emax            0.395     0.391     0.396
imean          23.709    24.147    23.686
imin           23.157    23.449    23.119
imax           24.014    24.518    23.999
excite_mean     0.554     0.554     0.554
fracstop        1.000     1.000     1.000
cjmean          2.840     2.840     2.840

libcent 0       180.2     179.3     179.6
libamp  0        33.8      58.8      30.0
libcent 1       178.5     185.2     177.4
libamp  1        54.9      75.4      51.4
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       208.8     152.5     211.5
kozaiamp        180.0     180.0     180.0