Orbit Fit and Astrometric record for 05GC187

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: 05GC187   
# Created Sat Oct 21 01:37:35 2017
# Orbit generated from Bernstein formalism
# Fitting   19 observations of   20
# Arc:  10.92y
# First observation: 2005/04/10
#  Last observation: 2016/03/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000427   0.028873   0.000010  -0.001045   0.025909   0.000000
# Chi-squared of fit:    35.91 DOF:   32 RMS:  0.24
# Min/Max residuals:    -0.82    0.53
# Exact a, adot, b, bdot, g, gdot:
  1.757211E-05  2.837567E-02 -2.321428E-07 -1.028180E-03  2.651920E-02  7.481156E-04
# Covariance matrix:
  3.4902E-13 -1.2396E-13 -3.4319E-15  2.8375E-15  3.2712E-13 -2.4873E-13
 -1.2396E-13  1.8827E-13  2.8437E-15 -6.0883E-15 -5.9264E-14  5.4081E-13
 -3.4319E-15  2.8437E-15  9.8188E-14 -1.1800E-14 -3.6062E-15  7.6847E-15
  2.8375E-15 -6.0883E-15 -1.1800E-14  7.0407E-15  5.0133E-16 -1.8587E-14
  3.2712E-13 -5.9264E-14 -3.6062E-15  5.0133E-16  4.8430E-13 -3.9214E-14
 -2.4873E-13  5.4081E-13  7.6847E-15 -1.8587E-14 -3.9214E-14  1.6526E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.222781 -147.732803    0.202066   -0.020776   -0.976931  2453470.869283
# Heliocentric elements and errors
Epoch:              2453470.5000  =  2005/04/10
Mean Anomaly:            8.40686 +/-     0.015
Argument of Peri:      198.85490 +/-     0.020
Long of Asc Node:        2.10951 +/-     0.002
Inclination:             2.39280 +/-     0.000
Eccentricity:         0.13102902 +/-    0.0001
Semi-Major Axis:     44.42860342 +/-    0.0063
Time of Perihelion: 2450944.5561 +/-       4.5
Perihelion:          38.60716714 +/-    0.0071
Aphelion:            50.25003970 +/-    0.0084
Period (y)              296.1435 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -32.81593196 +/-    0.0008
Ecliptic Y          -20.47859039 +/-    0.0005
Ecliptic Z           -0.80467249 +/-    0.0000
Ecliptic XDOT         0.00150097 +/-    0.0000
Ecliptic YDOT        -0.00252422 +/-    0.0000
Ecliptic ZDOT        -0.00010772 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.68986369 +/-    0.0008
Geocenter to KBO     37.70853235 +/-    0.0010
# Hcoef:  7.07

The following table shows the complete astrometric record for 05GC187. 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 (05GC187) followed by the observatory code and reference code for the source of the astrometry.

2005 04  10.36854  13 58 35.98   -13 24 30.4   23.0R 05GC187   695  Cn3379      
2005 04  11.33662  13 58 31.25   -13 24 06.2         05GC187   695  Cn3380      
2005 04  11.42230  13 58 30.84   -13 24 03.8         05GC187   695  Cn3380      
2005 05  09.18071  13 56 14.04   -13 12 00.1   22.0R 05GC187   807  Cn5373      
2005 05  10.17511  13 56 09.37   -13 11 35.0         05GC187   807  Cn5373      
2005 05  10.25976  13 56 08.96   -13 11 32.4         05GC187   807  Cn5373      
2005 05  10.31720  13 56 08.69   -13 11 31.4         05GC187   807  Cn5373      
2005 06  07.16410  13 54 17.23   -13 01 12.6         05GC187   304  Cn6545      
2005 06  07.20778  13 54 17.08   -13 01 11.7         05GC187   304  Cn6545      
2005 07  09.06262  13 53 19.47   -12 55 20.0   23.2R 05GC187   304  Cn8899      
2005 07  09.11595  13 53 19.45   -12 55 19.8         05GC187   304  Cn8899      
2005 08  07.99805  13 53 52.02   -12 57 36.2   21.7R 05GC187   807  Co4001      
2005 08  09.00612  13 53 54.60   -12 57 48.9         05GC187   807  Co4001      
2005 08  09.99889  13 53 57.23   -12 58 01.9         05GC187   807  Co4001      
2007 05  08.16529  14 08 47.42   -14 26 04.2         05GC187   304  Cy5743      
2007 05  08.24723  14 08 47.01   -14 26 02.3         05GC187   304  Cy5743      
2008 04  05.30120  14 17 41.46   -15 14 43.7   23.1R 05GC187   688  Cy5743      
2008 04  05.39182  14 17 41.16   -15 14 42.2         05GC187   688  Cy5743      
2016 03  13.41976  15 09 37.05   -19 32 47.9   23.0R 05GC187   G37  C~1pPk      
2016 03  13.51025  15 09 36.84   -19 32 47.6         05GC187   G37  C~1pPk      

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    -0.08
  2   0.0027    -73.13     0.04      -1.16    -0.28
  3   0.0029    -79.57     0.20      -0.98     0.02
  4   0.0789  -2203.66     0.05     -15.03    -0.01
  5   0.0816  -2276.34     0.18     -15.24    -0.18
  6   0.0818  -2282.86    -0.07     -14.88     0.19
  7   0.0820  -2286.90     0.12     -15.32    -0.24
  8   0.1582  -4029.24    -0.08      -3.62     0.09
  9   0.1584  -4031.61    -0.26      -3.54     0.14
 10   0.2456  -4943.99    -0.36      30.94     0.27
 11   0.2457  -4944.33    -0.33      31.03     0.30
 12   0.3275  -4450.33     0.21      70.14    -0.02
 13   0.3303  -4410.54     0.14      71.45     0.01
 14   0.3330  -4369.96     0.03      72.74     0.05
 15   2.0747   9634.97     0.52    -439.05     0.04
 16   2.0750   9628.71     0.53    -439.25    -0.14
 17   2.9868  17946.28    -0.82    -631.42    -0.22
 18   2.9871  17941.65 (   1.11)   -631.42 (  -0.06)
 19  10.9242  67310.19    -0.08   -2329.23     0.15
 20  10.9244  67306.93     0.11   -2329.73    -0.09

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.

05GC187    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.811    43.829    43.793
ecceobj         0.119     0.119     0.119
incobj          2.403     2.403     2.403
qmin           37.885    38.004    37.819
qmax           50.835    50.692    50.862
amean          44.187    44.187    44.155
amin           43.811    43.825    43.793
amax           44.596    44.583    44.571
emean           0.122     0.122     0.121
emin            0.104     0.108     0.102
emax            0.140     0.137     0.141
imean           3.038     2.844     3.081
imin            2.070     1.962     2.066
imax            3.942     3.660     4.039
excite_mean     0.133     0.132     0.133
fracstop        1.000     1.000     1.000
cjmean          3.082     3.083     3.082

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       172.8     182.1     173.8
kozaiamp        180.0     180.0     180.0