Orbit Fit and Astrometric record for 05LA54

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: 05LA54    
# Created Sun Oct 22 01:37:37 2017
# Orbit generated from Bernstein formalism
# Fitting   19 observations of   19
# Arc:   8.00y
# First observation: 2005/06/10
#  Last observation: 2013/06/09
Preliminary a, adot, b, bdot, g, gdot:
  -0.000248   0.024917   0.000039  -0.003417   0.023740   0.000000
# Chi-squared of fit:     8.37 DOF:   32 RMS:  0.12
# Min/Max residuals:    -0.31    0.18
# Exact a, adot, b, bdot, g, gdot:
  1.505950E-05  2.441647E-02 -2.516941E-06 -3.349075E-03  2.458153E-02 -9.103110E-04
# Covariance matrix:
  2.8168E-13 -3.4357E-13 -2.2799E-14  4.3018E-14  4.1865E-13 -1.5377E-12
 -3.4357E-13  6.3918E-13  4.4205E-14 -8.3457E-14 -8.2472E-13  2.9835E-12
 -2.2799E-14  4.4205E-14  1.1772E-13 -2.5246E-14 -5.5017E-14  2.0988E-13
  4.3018E-14 -8.3457E-14 -2.5246E-14  2.1005E-14  1.0692E-13 -3.9594E-13
  4.1865E-13 -8.2472E-13 -5.5017E-14  1.0692E-13  1.8531E-12 -3.8329E-12
 -1.5377E-12  2.9835E-12  2.0988E-13 -3.9594E-13 -3.8329E-12  1.4153E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.276535 -118.784758   -0.322491    0.021487   -0.960854  2453531.897613
# Heliocentric elements and errors
Epoch:              2453530.5000  =  2005/06/09
Mean Anomaly:          338.92559 +/-     0.161
Argument of Peri:      195.12307 +/-     0.186
Long of Asc Node:       70.67151 +/-     0.000
Inclination:             7.90698 +/-     0.000
Eccentricity:         0.07035075 +/-    0.0002
Semi-Major Axis:     44.53809329 +/-    0.0130
Time of Perihelion: 2459885.9862 +/-      48.4
Perihelion:          41.40480508 +/-    0.0140
Aphelion:            47.67138150 +/-    0.0156
Period (y)              297.2389 +/-      0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -19.76772577 +/-    0.0011
Ecliptic Y          -36.64411437 +/-    0.0020
Ecliptic Z            0.90622133 +/-    0.0001
Ecliptic XDOT         0.00242921 +/-    0.0000
Ecliptic YDOT        -0.00123495 +/-    0.0000
Ecliptic ZDOT        -0.00037514 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.64583217 +/-    0.0018
Geocenter to KBO     40.68094799 +/-    0.0023
# Hcoef:  6.73

The following table shows the complete astrometric record for 05LA54. 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 (05LA54) followed by the observatory code and reference code for the source of the astrometry.

2005 06  10.39687  15 57 26.89   -19 09 12.5   23.2g 05LA54    568  C~0VE2      
2005 06  10.42324  15 57 26.76   -19 09 12.3   23.2g 05LA54    568  C~0VE2      
2005 06  10.44979  15 57 26.64   -19 09 11.8   23.1g 05LA54    568  C~0VE2      
2005 06  11.41267  15 57 22.08   -19 09 00.9   23.1g 05LA54    568  C~0VE2      
2005 06  12.40265  15 57 17.46   -19 08 49.9   23.4g 05LA54    568  C~0VE2      
2005 07  28.24729  15 54 44.67   -19 03 42.2   22.2i 05LA54    568  C~0VE2      
2005 07  28.29707  15 54 44.58   -19 03 42.0   22.3i 05LA54    568  C~0VE2      
2005 07  29.25252  15 54 43.12   -19 03 41.1   22.4i 05LA54    568  C~0VE2      
2006 05  31.34456  16 03 57.65   -19 39 12.0   22.6r 05LA54    568  C~0VE2      
2006 05  31.38113  16 03 57.45   -19 39 11.6   22.5r 05LA54    568  C~0VE2      
2006 05  31.41661  16 03 57.27   -19 39 11.2   22.4r 05LA54    568  C~0VE2      
2006 06  02.42001  16 03 47.26   -19 38 47.8         05LA54    568  C~0VE2      
2007 05  15.38111  16 11 02.85   -20 09 36.2   21.5r 05LA54    695  C~0VE2      
2007 05  16.35160  16 10 58.02   -20 09 25.5         05LA54    675  C~0VE2      
2007 05  16.39197  16 10 57.82   -20 09 25.2         05LA54    675  C~0VE2      
2007 05  17.31445  16 10 53.21   -20 09 14.5   22.0r 05LA54    695  C~0VE2      
2013 06  09.01074  16 43 59.63   -22 34 27.9   22.5R 05LA54    304  C~0snn      
2013 06  09.13243  16 43 58.99   -22 34 27.0         05LA54    304  C~0snn      
2013 06  09.34588  16 43 57.87   -22 34 25.4         05LA54    304  C~0snn      

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     0.07
  2   0.0001     -1.84     0.11      -0.18    -0.03
  3   0.0001     -3.61     0.18      -0.03     0.18
  4   0.0028    -69.09    -0.18      -2.46     0.15
  5   0.0055   -135.43    -0.03      -4.98     0.14
  6   0.1310  -2318.27     0.03    -147.25     0.03
  7   0.1311  -2319.56    -0.09    -147.31     0.14
  8   0.1338  -2340.00     0.02    -150.71     0.10
  9   0.9718   5776.93     0.03    -668.48    -0.04
 10   0.9719   5774.08    -0.15    -668.63    -0.11
 11   0.9720   5771.51    -0.13    -668.73    -0.12
 12   0.9775   5628.14     0.03    -673.15    -0.22
 13   1.9274  12022.27    -0.14   -1331.74     0.10
 14   1.9301  11953.22    -0.00   -1333.68    -0.17
 15   1.9302  11950.39     0.10   -1333.90    -0.31
 16   1.9327  11884.39     0.08   -1335.27    -0.08
 17   7.9962  41185.91     0.01   -5631.75     0.05
 18   7.9965  41176.64    -0.01   -5632.01     0.07
 19   7.9971  41160.43     0.03   -5632.42     0.05

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.

05LA54    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.062    44.100    44.025
ecceobj         0.063     0.064     0.063
incobj          7.936     7.936     7.936
qmin           40.845    40.869    40.820
qmax           48.072    48.178    48.053
amean          44.374    44.412    44.336
amin           44.027    44.058    43.984
amax           44.738    44.777    44.701
emean           0.061     0.062     0.061
emin            0.047     0.048     0.046
emax            0.075     0.077     0.076
imean           6.230     6.232     6.228
imin            5.656     5.670     5.649
imax            6.806     6.806     6.799
excite_mean     0.125     0.125     0.124
fracstop        1.000     1.000     1.000
cjmean          3.087     3.088     3.087

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       181.9     182.4     181.7
kozaiamp        179.9     180.0     180.0