Orbit Fit and Astrometric record for 05GW186

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: 05GW186   
# Created Sat Oct 21 01:37:35 2017
# Orbit generated from Bernstein formalism
# Fitting    5 observations of    5
# Arc:   3.02d
# First observation: 2005/04/10
#  Last observation: 2005/04/13
# WARNING Fitting with energy constraint
# WARNING and with gdot fixed = 0
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# Chi-squared of fit:     4.20 DOF:    6 RMS:  0.16
# Min/Max residuals:    -0.28    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.434224E-05  2.466894E-02  1.253357E-06  1.668504E-03  2.596477E-02  0.000000E+00
# Covariance matrix:
  6.5566E-11  1.0213E-07 -7.5993E-13 -1.4290E-09  2.8262E-08  0.0000E+00
  1.0213E-07  1.6064E-04 -1.1940E-09 -2.2454E-06  4.4408E-05  0.0000E+00
 -7.5993E-13 -1.1940E-09  5.2447E-13 -6.4165E-11 -3.3016E-10  0.0000E+00
 -1.4290E-09 -2.2454E-06 -6.4165E-11  6.0909E-08 -6.2087E-07  0.0000E+00
  2.8262E-08  4.4408E-05 -3.3016E-10 -6.2087E-07  1.2279E-05  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  2.3034E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.562002  146.095948   -0.810124   -0.005620   -0.582393  2453470.667543
# Heliocentric elements and errors
Epoch:              2453470.5000  =  2005/04/10
Mean Anomaly:          167.88988 +/-   330.423
Argument of Peri:      181.83998 +/-   316.126
Long of Asc Node:      155.40567 +/-     5.149
Inclination:             3.91279 +/-     2.391
Eccentricity:         0.09958761 +/-    0.5587
Semi-Major Axis:     35.62547064 +/-   13.3501
Time of Perihelion: 2494916.9261 +/-   68317.1
Perihelion:          32.07761506 +/-   23.2526
Aphelion:            39.17332623 +/-   24.7321
Period (y)              212.6420 +/-    119.53
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -32.90370499 +/-    4.3136
Ecliptic Y           21.13369266 +/-    2.8993
Ecliptic Z           -0.37770176 +/-    0.0510
Ecliptic XDOT        -0.00145202 +/-    0.0014
Ecliptic YDOT        -0.00216508 +/-    0.0012
Ecliptic ZDOT         0.00017598 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.10792025 +/-    3.9530
Geocenter to KBO     38.51372279 +/-    5.1977
# Hcoef:  6.54

The following table shows the complete astrometric record for 05GW186. 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 (05GW186) followed by the observatory code and reference code for the source of the astrometry.

2005 04  10.16680  09 52 35.18   +12 17 26.5   22.2R 05GW186   695  Cn3379      
2005 04  10.25972  09 52 34.91   +12 17 28.3         05GW186   695  Cn3379      
2005 04  11.17236  09 52 32.61   +12 17 41.6         05GW186   695  Cn3379      
2005 04  12.17254  09 52 30.14   +12 17 56.7         05GW186   695  Cn3379      
2005 04  13.18328  09 52 27.72   +12 18 11.2         05GW186   695  Cn3379      

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     0.14       0.00    -0.05
  2   0.0003     -4.33    -0.28       0.36     0.20
  3   0.0028    -40.55     0.20       1.49    -0.24
  4   0.0055    -79.73     0.08       3.47     0.06
  5   0.0083   -118.01    -0.10       5.14     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.

05GW186    quality flag:0

Type:      ERR2LARGE ERR2LARGE ERR2LARGE

axisobj         0.000     0.000     0.000
ecceobj        -1.000    -1.000    -1.000
incobj         -1.000    -1.000    -1.000
qmin            0.000     0.000     0.000
qmax            0.000     0.000     0.000
amean           0.000     0.000     0.000
amin            0.000     0.000     0.000
amax            0.000     0.000     0.000
emean           0.000     0.000     0.000
emin            0.000     0.000     0.000
emax            0.000     0.000     0.000
imean           0.000     0.000     0.000
imin            0.000     0.000     0.000
imax            0.000     0.000     0.000
excite_mean     0.000     0.000     0.000
fracstop        0.000     0.000     0.000
cjmean          0.000     0.000     0.000

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         0.0       0.0       0.0
kozaiamp          0.0       0.0       0.0