Orbit Fit and Astrometric record for 05GA187

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: 05GA187   
# Created Wed Dec 13 02:37:25 2017
# Orbit generated from Bernstein formalism
# Fitting   22 observations of   22
# Arc:  10.17y
# First observation: 2005/04/10
#  Last observation: 2015/06/12
Preliminary a, adot, b, bdot, g, gdot:
  -0.000718   0.026571   0.000207  -0.009075   0.025752   0.000000
# Chi-squared of fit:    23.25 DOF:   38 RMS:  0.18
# Min/Max residuals:    -0.72    0.34
# Exact a, adot, b, bdot, g, gdot:
  1.451082E-05  2.478609E-02 -1.518679E-06 -8.382482E-03  2.638733E-02 -5.676139E-03
# Covariance matrix:
  3.3168E-13 -2.1988E-13 -2.4237E-14  8.2616E-14  3.0021E-13 -8.8918E-13
 -2.1988E-13  6.8937E-13  6.8231E-14 -2.5701E-13 -3.0463E-14  2.7390E-12
 -2.4237E-14  6.8231E-14  9.0128E-14 -3.5007E-14 -8.1790E-15  2.7388E-13
  8.2616E-14 -2.5701E-13 -3.5007E-14  1.0154E-13  1.7060E-14 -1.0294E-12
  3.0021E-13 -3.0463E-14 -8.1790E-15  1.7060E-14  4.6198E-13 -1.9564E-13
 -8.8918E-13  2.7390E-12  2.7388E-13 -1.0294E-12 -1.9564E-13  1.0973E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.380691 -148.015342    0.197245   -0.023492   -0.977855  2453470.869283
# Heliocentric elements and errors
Epoch:              2453470.5000  =  2005/04/10
Mean Anomaly:          286.99810 +/-     0.015
Argument of Peri:      282.07731 +/-     0.025
Long of Asc Node:       27.71349 +/-     0.000
Inclination:            18.70726 +/-     0.000
Eccentricity:         0.21598848 +/-    0.0001
Semi-Major Axis:     39.57444390 +/-    0.0041
Time of Perihelion: 2471910.1354 +/-       2.3
Perihelion:          31.02682003 +/-    0.0058
Aphelion:            48.12206778 +/-    0.0070
Period (y)              248.9605 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -33.07264619 +/-    0.0008
Ecliptic Y          -20.41959487 +/-    0.0005
Ecliptic Z           -0.91316161 +/-    0.0000
Ecliptic XDOT         0.00187975 +/-    0.0000
Ecliptic YDOT        -0.00186544 +/-    0.0000
Ecliptic ZDOT        -0.00085523 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.87921867 +/-    0.0008
Geocenter to KBO     37.89698054 +/-    0.0010
# Hcoef:  7.29

The following table shows the complete astrometric record for 05GA187. 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 (05GA187) followed by the observatory code and reference code for the source of the astrometry.

2005 04  10.36854  13 57 17.10   -13 27 31.5         05GA187   695  Cn3379      
2005 04  11.33662  13 57 12.17   -13 27 09.6         05GA187   695  Cn3379      
2005 04  11.42230  13 57 11.74   -13 27 07.3         05GA187   695  Cn3379      
2005 05  09.18071  13 54 49.41   -13 16 33.6   22.0R 05GA187   807  Cn5372      
2005 05  10.17511  13 54 44.53   -13 16 11.5         05GA187   807  Cn5372      
2005 05  10.25976  13 54 44.09   -13 16 09.7         05GA187   807  Cn5372      
2005 05  10.31720  13 54 43.84   -13 16 08.4         05GA187   807  Cn5372      
2005 06  02.31324  13 53 04.12   -13 08 33.8   23.5R 05GA187   568  Cn6545      
2005 06  02.34634  13 53 03.98   -13 08 33.2         05GA187   568  Cn6545      
2005 06  07.06353  13 52 47.46   -13 07 18.1   23.4R 05GA187   304  Cn6545      
2005 06  07.15549  13 52 47.14   -13 07 17.0         05GA187   304  Cn6545      
2005 07  09.05281  13 51 43.47   -13 02 59.9   23.6R 05GA187   304  Cn8899      
2005 07  09.10588  13 51 43.44   -13 02 59.9         05GA187   304  Cn8899      
2005 08  07.99805  13 52 10.44   -13 06 42.3   22.1R 05GA187   807  Co4001      
2005 08  09.00612  13 52 12.82   -13 06 57.9         05GA187   807  Co4001      
2005 08  09.99889  13 52 15.26   -13 07 13.7         05GA187   807  Co4001      
2006 04  26.19356  14 00 47.21   -14 18 32.5   22.2R 05GA187   807  Cr3594      
2006 04  26.27932  14 00 46.75   -14 18 30.2         05GA187   807  Cr3594      
2006 04  27.21054  14 00 41.85   -14 18 08.9         05GA187   807  Cr3594      
2015 06  12.17521  14 45 10.36   -22 43 14.5   23.1R 05GA187   695  C~1hTh      
2015 06  12.22256  14 45 10.15   -22 43 13.5         05GA187   695  C~1hTh      
2015 06  12.27596  14 45 09.89   -22 43 12.3         05GA187   695  C~1hTh      

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     0.07       0.00    -0.72
  2   0.0027    -75.05    -0.06      -4.41    -0.12
  3   0.0029    -81.73     0.00      -4.43     0.34
  4   0.0789  -2249.64     0.03    -133.49     0.08
  5   0.0816  -2324.12    -0.13    -137.66    -0.03
  6   0.0818  -2330.77    -0.38    -138.22    -0.22
  7   0.0820  -2334.65     0.07    -138.28    -0.04
  8   0.1450  -3858.23     0.12    -222.31    -0.07
  9   0.1450  -3860.36    -0.11    -222.47    -0.10
 10   0.1580  -4112.78     0.09    -236.86     0.28
 11   0.1582  -4117.54     0.10    -237.47    -0.02
 12   0.2455  -5079.27     0.01    -323.94    -0.06
 13   0.2457  -5079.68     0.06    -324.10    -0.08
 14   0.3275  -4631.91     0.17    -393.45     0.11
 15   0.3303  -4593.86    -0.04    -395.82     0.10
 16   0.3330  -4554.92    -0.21    -398.08     0.18
 17   1.0426   3928.73     0.28   -1816.88     0.02
 18   1.0429   3921.66     0.12   -1817.02     0.31
 19   1.0454   3847.43    -0.19   -1821.48     0.12
 20  10.1706  50509.87     0.06  -18965.52    -0.05
 21  10.1707  50506.60     0.11  -18965.35    -0.01
 22  10.1709  50502.56    -0.18  -18965.18     0.01

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.

05GA187    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.158    39.169    39.146
ecceobj         0.218     0.218     0.218
incobj         18.813    18.813    18.813
qmin           27.668    27.634    27.681
qmax           51.875    51.875    51.854
amean          39.454    39.454    39.454
amin           39.048    39.042    39.050
amax           39.958    39.938    39.960
emean           0.249     0.249     0.248
emin            0.195     0.194     0.195
emax            0.298     0.299     0.298
imean          16.608    16.576    16.635
imin           14.065    14.009    14.082
imax           18.868    18.867    18.868
excite_mean     0.381     0.380     0.381
fracstop        1.000     1.000     1.000
cjmean          2.887     2.887     2.886

libcent 0       179.3     179.5     179.3
libamp  0        61.1      57.5      61.4
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       264.3     264.2     264.4
kozaiamp         47.0      47.5      47.1