Orbit Fit and Astrometric record for 05GF187

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: 05GF187   
# Created Mon Dec 18 02:37:24 2017
# Orbit generated from Bernstein formalism
# Fitting   28 observations of   28
# Arc:  12.12y
# First observation: 2005/04/12
#  Last observation: 2017/05/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.006915   0.046485  -0.000031  -0.000077   0.029258   0.000000
# Chi-squared of fit:    61.82 DOF:   50 RMS:  0.26
# Min/Max residuals:    -0.52    0.68
# Exact a, adot, b, bdot, g, gdot:
  1.985181E-05  4.069513E-02  1.921968E-07 -8.712008E-05  3.313047E-02 -5.592220E-03
# Covariance matrix:
  2.3150E-13 -6.3464E-14  1.8472E-15 -1.1301E-16  2.2244E-13 -1.0707E-13
 -6.3464E-14  5.4848E-14 -1.2236E-16 -7.3479E-17 -2.2676E-14  9.5742E-14
  1.8472E-15 -1.2236E-16  7.1266E-14 -9.2370E-15  3.3798E-15 -3.1108E-16
 -1.1301E-16 -7.3479E-17 -9.2370E-15  4.0869E-15 -3.3816E-16 -1.2963E-16
  2.2244E-13 -2.2676E-14  3.3798E-15 -3.3816E-16  3.9411E-13 -5.2040E-14
 -1.0707E-13  9.5742E-14 -3.1108E-16 -1.2963E-16 -5.2040E-14  1.8080E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    4.028172 -139.056050    0.315136    0.066628   -0.945038  2453472.860283
# Heliocentric elements and errors
Epoch:              2453470.5000  =  2005/04/10
Mean Anomaly:          334.88856 +/-     0.007
Argument of Peri:      133.95180 +/-     0.010
Long of Asc Node:      128.83607 +/-     0.001
Inclination:             3.90648 +/-     0.000
Eccentricity:         0.25809629 +/-    0.0001
Semi-Major Axis:     39.71003554 +/-    0.0043
Time of Perihelion: 2459846.0550 +/-       1.4
Perihelion:          29.46102289 +/-    0.0039
Aphelion:            49.95904819 +/-    0.0059
Period (y)              250.2411 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -23.66900054 +/-    0.0004
Ecliptic Y          -20.11481174 +/-    0.0004
Ecliptic Z            2.12035169 +/-    0.0000
Ecliptic XDOT         0.00255206 +/-    0.0000
Ecliptic YDOT        -0.00224557 +/-    0.0000
Ecliptic ZDOT        -0.00003959 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.13395460 +/-    0.0004
Geocenter to KBO     30.18369796 +/-    0.0006
# Hcoef:  7.91

The following table shows the complete astrometric record for 05GF187. 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 (05GF187) followed by the observatory code and reference code for the source of the astrometry.

2005 04  12.35954  14 39 11.16   -11 16 42.4   22.6R 05GF187   695  Cn3380      
2005 04  12.45645  14 39 10.61   -11 16 39.4         05GF187   695  Cn3380      
2005 04  13.47601  14 39 04.85   -11 16 09.6         05GF187   695  Cn3380      
2005 05  10.21159  14 36 25.40   -11 03 11.5   21.7R 05GF187   807  Cn5373      
2005 05  11.04814  14 36 20.42   -11 02 48.4         05GF187   807  Cn5373      
2005 05  11.13746  14 36 19.88   -11 02 46.2         05GF187   807  Cn5373      
2005 06  02.32985  14 34 16.65   -10 54 00.2   22.2R 05GF187   568  Cn6545      
2005 06  02.36380  14 34 16.45   -10 53 59.7         05GF187   568  Cn6545      
2005 06  07.17737  14 33 53.37   -10 52 30.7         05GF187   304  Cn6545      
2005 06  07.22145  14 33 53.18   -10 52 30.3         05GF187   304  Cn6545      
2005 08  08.01365  14 32 22.42   -10 52 36.8   21.7R 05GF187   807  Co4001      
2005 08  09.02191  14 32 24.63   -10 52 55.6         05GF187   807  Co4001      
2005 08  10.01514  14 32 26.92   -10 53 14.8         05GF187   807  Co4001      
2006 04  22.27731  14 47 23.75   -11 55 01.2   22.5R 05GF187   304  Cr0851      
2006 04  22.32644  14 47 23.44   -11 55 00.1         05GF187   304  Cr0851      
2006 04  26.23779  14 47 00.03   -11 53 07.3   21.6R 05GF187   807  Cr3594      
2006 04  26.32218  14 46 59.50   -11 53 04.9         05GF187   807  Cr3594      
2006 04  28.09996  14 46 48.75   -11 52 14.3         05GF187   807  Cr3594      
2006 05  03.28787  14 46 17.03   -11 49 46.2         05GF187   695  Cr0851      
2006 05  03.35244  14 46 16.66   -11 49 44.7         05GF187   695  Cr0851      
2008 05  20.00865  15 03 14.49   -13 06 52.9   24.0R 05GF187   250  S~06Aq      
2008 05  20.01490  15 03 14.45   -13 06 52.8         05GF187   250  S~06Aq      
2008 05  20.02115  15 03 14.41   -13 06 52.7         05GF187   250  S~06Aq      
2008 05  20.02740  15 03 14.38   -13 06 52.5         05GF187   250  S~06Aq      
2009 04  27.36884  15 15 11.92   -13 57 29.9   22.9R 05GF187   688  C~06gB      
2009 04  27.42813  15 15 11.53   -13 57 27.9         05GF187   688  C~06gB      
2017 05  26.34102  16 33 51.40   -18 26 28.8   22.7R 05GF187   G37  C~2GiU      
2017 05  26.39906  16 33 51.03   -18 26 27.0         05GF187   G37  C~2GiU      

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    -0.09       0.00    -0.05
  2   0.0003     -8.62    -0.08       0.38     0.10
  3   0.0031    -98.41    -0.11       2.78    -0.15
  4   0.0763  -2570.63    -0.01      21.54    -0.17
  5   0.0785  -2647.50     0.03      20.88     0.12
  6   0.0788  -2655.75     0.12      20.52    -0.08
  7   0.1395  -4544.69     0.16     -40.93     0.10
  8   0.1396  -4547.64    -0.17     -41.37    -0.18
  9   0.1528  -4898.63    -0.10     -62.31    -0.05
 10   0.1529  -4901.41     0.26     -62.80    -0.32
 11   0.3221  -6170.87    -0.14    -485.22    -0.07
 12   0.3249  -6134.05    -0.05    -492.94    -0.07
 13   0.3276  -6095.98    -0.04    -500.67    -0.22
 14   1.0265   7597.65    -0.27       2.21     0.44
 15   1.0266   7592.98    -0.35       1.90     0.07
 16   1.0373   7230.90     0.28       6.54     0.37
 17   1.0375   7222.75     0.13       6.50     0.28
 18   1.0424   7056.84     0.38       7.44    -0.10
 19   1.0566   6567.66    -0.22       8.90     0.68
 20   1.0568   6562.03     0.33       8.70     0.52
 21   3.1038  22254.06    -0.00     -49.42    -0.36
 22   3.1038  22253.47    -0.02     -49.49    -0.42
 23   3.1038  22252.87    -0.03     -49.57    -0.47
 24   3.1038  22252.39     0.07     -49.50    -0.39
 25   4.0411  33348.62     0.18     -42.58    -0.05
 26   4.0413  33342.45    -0.29     -42.20     0.30
 27  12.1204 112363.80    -0.12    -214.49    -0.52
 28  12.1206 112356.67     0.12    -213.54     0.66

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.

05GF187    quality flag:3

Type:           3:2E      3:2E      3:2E
Type:                              6:4II

axisobj        39.177    39.189    39.165
ecceobj         0.251     0.251     0.251
incobj          3.908     3.908     3.908
qmin           28.710    28.703    28.709
qmax           50.723    50.792    50.676
amean          39.455    39.455    39.455
amin           39.092    39.097    39.111
amax           39.887    39.902    39.869
emean           0.245     0.245     0.245
emin            0.212     0.212     0.212
emax            0.273     0.273     0.272
imean           5.421     5.479     5.372
imin            2.498     2.497     2.498
imax            7.978     8.015     7.976
excite_mean     0.264     0.264     0.264
fracstop        1.000     1.000     1.000
cjmean          2.972     2.972     2.972

libcent 0       180.3     180.1     180.0
libamp  0        26.7      33.6      19.4
libcent 1      -180.0    -180.0     225.6
libamp  1      -180.0    -180.0     127.8
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       105.0     105.6     104.4
kozaiamp         48.7      49.0      49.4