Orbit Fit and Astrometric record for 14GB54

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: 14GB54    
# Created Mon Oct 23 01:38:23 2017
# Orbit generated from Bernstein formalism
# Fitting   12 observations of   12
# Arc:  46.93d
# First observation: 2014/04/04
#  Last observation: 2014/05/21
Preliminary a, adot, b, bdot, g, gdot:
  -0.000007   0.039125   0.000002   0.018763   0.034561   0.000000
# Chi-squared of fit:     7.93 DOF:   18 RMS:  0.14
# Min/Max residuals:    -0.28    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.702956E-05  3.980723E-02  8.915934E-06  1.871810E-02  3.461440E-02 -5.857882E-03
# Covariance matrix:
  3.9467E-13  7.5507E-11 -4.7551E-14  6.5515E-14  1.3775E-11  2.4442E-10
  7.5507E-11  2.0377E-07 -1.0535E-10 -1.3514E-09  3.3540E-08  2.0551E-09
 -4.7551E-14 -1.0535E-10  3.6601E-13 -2.2724E-12 -1.7457E-11 -3.2756E-11
  6.5515E-14 -1.3514E-09 -2.2724E-12  5.9748E-11 -2.1305E-10  2.6342E-09
  1.3775E-11  3.3540E-08 -1.7457E-11 -2.1305E-10  5.5358E-09  4.2613E-09
  2.4442E-10  2.0551E-09 -3.2756E-11  2.6342E-09  4.2613E-09  1.1017E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
    7.099407 -140.710883    0.417788    0.112252   -0.900719  2456751.996268
# Heliocentric elements and errors
Epoch:              2456750.5000  =  2014/04/03
Mean Anomaly:          337.62117 +/-     2.591
Argument of Peri:       55.50269 +/-     4.982
Long of Asc Node:      204.24881 +/-     0.158
Inclination:            26.16066 +/-     0.245
Eccentricity:         0.27716698 +/-    0.0216
Semi-Major Axis:     39.15212331 +/-    0.7888
Time of Perihelion: 2462312.9514 +/-     621.8
Perihelion:          28.30044752 +/-    1.0204
Aphelion:            50.00379911 +/-    1.3157
Period (y)              244.9860 +/-      7.40
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -23.15633671 +/-    0.0477
Ecliptic Y          -18.40346200 +/-    0.0390
Ecliptic Z            3.57080540 +/-    0.0077
Ecliptic XDOT         0.00248572 +/-    0.0001
Ecliptic YDOT        -0.00203311 +/-    0.0001
Ecliptic ZDOT         0.00141203 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   29.79352270 +/-    0.0442
Geocenter to KBO     28.88971183 +/-    0.0621
# Hcoef:  7.45

The following table shows the complete astrometric record for 14GB54. 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 (14GB54) followed by the observatory code and reference code for the source of the astrometry.

2014 04  04.49549  14 36 40.480  -07 50 56.25  21.9w 14GB54    F51  C~1vXN      
2014 04  04.50886  14 36 40.404  -07 50 55.28  22.0w 14GB54    F51  C~1vXN      
2014 04  04.52222  14 36 40.309  -07 50 55.00  22.2w 14GB54    F51  C~1vXN      
2014 04  04.53564  14 36 40.239  -07 50 54.38  22.0w 14GB54    F51  C~1vXN      
2014 04  29.35616  14 34 15.397  -07 32 59.19  22.4w 14GB54    F51  C~1vXN      
2014 04  29.36871  14 34 15.336  -07 32 58.77  22.3w 14GB54    F51  C~1vXN      
2014 04  29.38127  14 34 15.232  -07 32 58.03  22.3w 14GB54    F51  C~1vXN      
2014 04  29.39386  14 34 15.139  -07 32 57.57  22.6w 14GB54    F51  C~1vXN      
2014 05  21.38985  14 32 02.925  -07 19 02.16  22.1w 14GB54    F51  C~1vXN      
2014 05  21.40187  14 32 02.857  -07 19 01.61  22.3w 14GB54    F51  C~1vXN      
2014 05  21.41387  14 32 02.769  -07 19 01.43  22.4w 14GB54    F51  C~1vXN      
2014 05  21.42585  14 32 02.704  -07 19 00.99  22.2w 14GB54    F51  C~1vXN      

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     0.24       0.00    -0.08
  2   0.0000     -1.37     0.06       0.57     0.27
  3   0.0001     -2.80    -0.16       0.40    -0.12
  4   0.0001     -3.98    -0.14       0.66    -0.08
  5   0.0681  -2384.92     0.05     351.82    -0.00
  6   0.0681  -2385.91     0.33     351.94    -0.02
  7   0.0681  -2387.61    -0.10     352.16     0.07
  8   0.0682  -2389.07    -0.28     352.16    -0.05
  9   0.1284  -4518.85     0.10     530.77     0.02
 10   0.1284  -4519.99     0.08     530.98     0.17
 11   0.1285  -4521.29    -0.11     530.74    -0.13
 12   0.1285  -4522.34    -0.06     530.85    -0.07

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.

14GB54    quality flag:1

Type:           3:2E  CENTAURR  CENTAURR

axisobj        38.930    41.626    36.648
ecceobj         0.275     0.325     0.229
incobj         26.234    25.436    27.078
qmin           27.137    26.792    28.262
qmax           52.712    57.770    46.624
amean          39.455    41.949    37.197
amin           38.861    40.772    36.648
amax           40.156    43.063    37.520
emean           0.281     0.339     0.235
emin            0.246     0.302     0.229
emax            0.314     0.362     0.243
imean          26.700    25.140    27.182
imin           25.645    24.290    27.077
imax           27.929    26.601    27.312
excite_mean     0.530     0.544     0.514
fracstop        1.000     0.068     0.001
cjmean          2.725     2.737     2.743

libcent 0       177.4    -180.0    -180.0
libamp  0       162.2    -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       169.9      94.1      59.8
kozaiamp        180.0      43.0       1.3