Orbit Fit and Astrometric record for 05GD187

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: 05GD187   
# Created Thu Dec  9 02:10:15 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     23 observations of     23
# Arc:  14.85y
# First observation: 2005/04/12
#  Last observation: 2020/02/18
# Chi-squared of fit:    24.24 DOF:     40 RMS:  0.18
# Min/Max residuals:    -0.45    0.45
# Exact a, adot, b, bdot, g, gdot:
  1.394057E-05  2.169864E-02 -1.083411E-06 -2.401805E-04  2.310104E-02 -3.593289E-04
# Covariance matrix:
  2.0807E-13 -4.4601E-14 -5.7050E-16  3.6814E-16 -6.5469E-14 -1.0157E-13
 -4.4601E-14  4.7408E-14  6.3119E-16 -4.1813E-16 -7.5277E-14  1.1972E-13
 -5.7050E-16  6.3119E-16  1.3410E-13 -1.2942E-14 -7.6608E-16  1.7214E-15
  3.6814E-16 -4.1813E-16 -1.2942E-14  2.4041E-15  5.2991E-16 -1.1371E-15
 -6.5469E-14 -7.5277E-14 -7.6608E-16  5.2991E-16  3.9718E-13 -1.6053E-13
 -1.0157E-13  1.1972E-13  1.7214E-15 -1.1371E-15 -1.6053E-13  3.2428E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.294258  149.000150   -0.801216    0.003151   -0.595627  2453472.687163
# Heliocentric elements and errors
Epoch:              2453472.5000  =  2005/04/12
Mean Anomaly:          178.93865 +/-     0.113
Argument of Peri:      336.51683 +/-     0.108
Long of Asc Node:      354.56316 +/-     0.003
Inclination:             0.69931 +/-     0.000
Eccentricity:         0.01406455 +/-    0.0001
Semi-Major Axis:     43.28586605 +/-    0.0051
Time of Perihelion: 2401769.0834 +/-      33.8
Perihelion:          42.67706996 +/-    0.0064
Aphelion:            43.89466214 +/-    0.0065
Period (y)              284.7917 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -38.03253655 +/-    0.0010
Ecliptic Y           21.91367631 +/-    0.0006
Ecliptic Z            0.22228788 +/-    0.0000
Ecliptic XDOT        -0.00128772 +/-    0.0000
Ecliptic YDOT        -0.00223329 +/-    0.0000
Ecliptic ZDOT        -0.00002863 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.89456052 +/-    0.0009
Geocenter to KBO     43.28815181 +/-    0.0012
# Hcoef:  7.28

The following table shows the complete astrometric record for 05GD187. 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 (05GD187) followed by the observatory code and reference code for the source of the astrometry.

2005 04  12.18642  10 04 57.11   +12 05 51.6   23.3R 05GD187   695  Cn3380      
2005 04  12.25321  10 04 56.94   +12 05 52.5         05GD187   695  Cn3380      
2005 04  13.19754  10 04 54.67   +12 06 03.9         05GD187   695  Cn3380      
2005 06  08.95709  10 04 54.51   +12 05 33.6   23.0R 05GD187   304  Cn7074      
2005 06  09.01469  10 04 54.65   +12 05 33.0         05GD187   304  Cn7074      
2006 04  27.04912  10 09 13.56   +11 41 22.4   22.8R 05GD187   807  Cr3923      
2006 04  28.03228  10 09 12.25   +11 41 28.7         05GD187   807  Cr3923      
2007 02  15.20802  10 18 07.43   +10 51 03.5         05GD187   304  Cu1516      
2007 02  15.25295  10 18 07.24   +10 51 04.6         05GD187   304  Cu1516      
2007 02  15.28286  10 18 07.10   +10 51 05.3         05GD187   304  Cu1516      
2009 01  21.20998  10 29 14.56   +09 45 15.5   24.2R 05GD187   250  S~06Aq      
2009 01  21.21623  10 29 14.53   +09 45 15.6         05GD187   250  S~06Aq      
2009 01  21.27387  10 29 14.33   +09 45 16.8         05GD187   250  S~06Aq      
2009 01  21.28082  10 29 14.31   +09 45 17.0         05GD187   250  S~06Aq      
2013 03  13.33358  10 44 22.29   +08 11 36.7   23.3R 05GD187   695  C~0udF      
2013 03  14.30682  10 44 18.08   +08 12 02.0         05GD187   695  C~0udF      
2013 03  14.41697  10 44 17.63   +08 12 04.9         05GD187   695  C~0udF      
2015 02  18.28396  10 55 25.85   +07 02 20.6   23.4R 05GD187   695  C~1M6E      
2015 02  18.37645  10 55 25.44   +07 02 22.8         05GD187   695  C~1M6E      
2015 02  18.46696  10 55 25.05   +07 02 25.4         05GD187   695  C~1M6E      
2020 02  18.276880 11 18 36.543  +04 32 12.49  23.9G 05GD187   G37  C~3iO3      
2020 02  18.367850 11 18 36.171  +04 32 14.84        05GD187   G37  C~3iO3      
2020 02  18.419070 11 18 35.951  +04 32 16.27        05GD187   G37  C~3iO3      

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     0.25       0.00     0.11
     2   0.0002      0.00     0.19       0.00     0.17
     3   0.0028      0.00    -0.24       0.00    -0.21
     4   0.1582      0.00    -0.05       0.00    -0.13
     5   0.1583      0.00     0.05       0.00     0.06
     6   1.0400      0.00    -0.20       0.00    -0.03
     7   1.0427      0.00    -0.23       0.00    -0.45
     8   1.8454      0.00    -0.14       0.00    -0.10
     9   1.8455      0.00     0.09       0.00    -0.13
    10   1.8456      0.00     0.03       0.00    -0.19
    11   3.7783      0.00     0.16       0.00     0.14
    12   3.7783      0.00     0.05       0.00     0.11
    13   3.7785      0.00     0.13       0.00     0.11
    14   3.7785      0.00     0.20       0.00     0.17
    15   7.9183      0.00     0.22       0.00     0.04
    16   7.9209      0.00    -0.27       0.00     0.36
    17   7.9212      0.00     0.15       0.00     0.45
    18   9.8538      0.00     0.18       0.00    -0.04
    19   9.8540      0.00     0.05       0.00    -0.26
    20   9.8543      0.00     0.10       0.00    -0.03
    21  14.8531      0.00    -0.08       0.00    -0.15
    22  14.8533      0.00    -0.03       0.00    -0.14
    23  14.8535      0.00    -0.15       0.00    -0.03

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.

05GD187    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.990    42.990    42.990
ecceobj         0.022     0.022     0.022
incobj          0.702     0.702     0.702
qmin           41.222    41.223    41.222
qmax           45.121    45.121    45.120
amean          43.091    43.091    43.091
amin           42.762    42.763    42.761
amax           43.424    43.424    43.425
emean           0.023     0.023     0.023
emin            0.004     0.004     0.004
emax            0.039     0.039     0.039
imean           2.087     2.087     2.087
imin            1.039     1.039     1.039
imax            2.827     2.827     2.827
excite_mean     0.043     0.043     0.043
fracstop        1.000     1.000     1.000
cjmean          3.088     3.088     3.088

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       180.1     180.2     180.2
kozaiamp        180.0     180.0     180.0