Orbit Fit and Astrometric record for 12GV1

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: 12GV1     
# Created Wed Jan 24 02:37:58 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   27 observations of   27
# Arc:   6.38y
# First observation: 2010/01/12
#  Last observation: 2016/05/29
# Chi-squared of fit:   151.49 DOF:   48 RMS:  0.42
# Min/Max residuals:    -0.74    1.50
# Exact a, adot, b, bdot, g, gdot:
  4.097083E-05  3.465862E-01  1.527961E-05  1.150292E-01  1.340086E-01  2.162454E-02
# Covariance matrix:
  4.2831E-08  4.2101E-02  1.6418E-08  1.6171E-02  7.3963E-12  3.5629E-02
  4.2101E-02  4.1460E+04  1.6139E-02  1.5925E+04  7.2701E-06  3.5086E+04
  1.6418E-08  1.6139E-02  6.2954E-09  6.1991E-03  2.8353E-12  1.3658E-02
  1.6171E-02  1.5925E+04  6.1991E-03  6.1169E+03  2.7925E-06  1.3477E+04
  7.3963E-12  7.2701E-06  2.8353E-12  2.7925E-06  1.2773E-15  6.1524E-06
  3.5629E-02  3.5086E+04  1.3658E-02  1.3477E+04  6.1524E-06  2.9691E+04
#      lat0       lon0       xBary       yBary       zBary        JD0
   -7.487257  152.931102    0.645336   -0.097427   -0.741269  2455208.959206
# Heliocentric elements and errors
Epoch:              2455208.5000  =  2010/01/12
Mean Anomaly:          359.54334 +/-     0.010
Argument of Peri:      340.54451 +/-     0.000
Long of Asc Node:      168.66045 +/-     0.000
Inclination:            18.97772 +/-     0.000
Eccentricity:         0.55011869 +/-   35.3265
Semi-Major Axis:     18.27849345 +/-    0.0000
Time of Perihelion: 2455244.7079 +/-       0.8
Perihelion:           8.22315263 +/-  645.7158
Aphelion:            28.33383428 +/-  645.7158
Period (y)               78.1482 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -6.95659600 +/-    0.0000
Ecliptic Y            4.27855426 +/-    0.0000
Ecliptic Z           -0.97225610 +/-    0.0000
Ecliptic XDOT        -0.00388210 +/-    0.0012
Ecliptic YDOT        -0.00596099 +/-    0.0005
Ecliptic ZDOT         0.00227242 +/-    0.0003
# Distances at JD0 (AU)
Heliocenter to KBO    8.22469431 +/-    0.0000
Geocenter to KBO      7.46221890 +/-    0.0000
# Hcoef: 11.85

The following table shows the complete astrometric record for 12GV1. 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 (12GV1) followed by the observatory code and reference code for the source of the astrometry.

2010 01  12.45844  10 08 44.34   +03 26 06.1   22.0V 12GV1     G96  C~0gNX      
2010 01  12.46561  10 08 44.26   +03 26 06.8   21.9V 12GV1     G96  C~0gNX      
2010 01  12.47287  10 08 44.23   +03 26 07.6   20.9V 12GV1     G96  C~0gNX      
2010 01  12.48013  10 08 44.12   +03 26 08.5   20.9V 12GV1     G96  C~0gNX      
2011 03  05.39920  11 20 56.36   +04 14 55.5   20.5V 12GV1     G96  C~0gNX      
2011 03  05.39995  11 20 56.36   +04 14 55.8   20.9V 12GV1     G96  C~0gNX      
2011 03  05.40594  11 20 56.29   +04 14 56.9   20.5V 12GV1     G96  C~0gNX      
2011 03  05.40667  11 20 56.25   +04 14 57.3   20.8V 12GV1     G96  C~0gNX      
2011 03  05.41271  11 20 56.11   +04 14 58.2   21.3V 12GV1     G96  C~0gNX      
2011 03  05.41347  11 20 56.14   +04 14 57.9   20.9V 12GV1     G96  C~0gNX      
2011 03  05.42019  11 20 56.07   +04 14 59.2   20.7V 12GV1     G96  C~0gNX      
2012 02  26.30144  12 40 04.76   +02 18 48.0   20.9V 12GV1     691  C~0gNX      
2012 02  26.31938  12 40 04.55   +02 18 50.9   21.4V 12GV1     691  C~0gNX      
2012 02  26.33732  12 40 04.39   +02 18 53.3   21.1V 12GV1     691  C~0gNX      
2012 03  29.35551  12 32 34.58   +03 46 32.8   21.1V 12GV1     G96  C~0g7v      
2012 03  29.36127  12 32 34.44   +03 46 34.4   21.4V 12GV1     G96  C~0g7v      
2012 03  29.36712  12 32 34.36   +03 46 35.2   21.1V 12GV1     G96  C~0g7v      
2012 03  29.37294  12 32 34.26   +03 46 36.0   20.6V 12GV1     G96  C~0g7v      
2012 04  12.33925  12 29 01.633  +04 21 23.09  21.3w 12GV1     F51  C~0fkn      
2012 04  12.35319  12 29 01.425  +04 21 24.97  21.6w 12GV1     F51  C~0fkn      
2012 04  12.36714  12 29 01.216  +04 21 27.07  21.8w 12GV1     F51  C~0fkn      
2012 04  12.38115  12 29 00.994  +04 21 28.87  21.6w 12GV1     F51  C~0fkn      
2012 04  13.28596  12 28 47.87   +04 23 32.5   21.3R 12GV1     291  C~0fkn      
2012 04  13.31808  12 28 47.39   +04 23 36.8   21.3R 12GV1     291  C~0fkn      
2012 04  13.35648  12 28 46.81   +04 23 42.1   21.1R 12GV1     291  C~0fkn      
2016 05  29.35286  15 46 47.221  -00 26 37.08  22.2R 12GV1     G37              
2016 05  29.40562  15 46 46.495  -00 26 35.53        12GV1     G37              

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    -0.57       0.00     1.50
  2   0.0000      0.00    -0.10       0.00    -0.27
  3   0.0000      0.00     0.58       0.00    -0.07
  4   0.0001      0.00     0.06       0.00     0.24
  5   1.1415      0.00    -0.03       0.00    -0.25
  6   1.1415      0.00     0.16       0.00    -0.08
  7   1.1415      0.00     0.58       0.00    -0.02
  8   1.1415      0.00     0.16       0.00     0.25
  9   1.1416      0.00    -0.46       0.00     0.10
 10   1.1416      0.00     0.17       0.00    -0.33
 11   1.1416      0.00     0.77       0.00    -0.19
 12   2.1214      0.00    -0.07       0.00     0.02
 13   2.1215      0.00    -0.20       0.00     0.10
 14   2.1215      0.00     0.43       0.00    -0.31
 15   2.2092      0.00     0.82       0.00    -0.65
 16   2.2092      0.00     0.10       0.00     0.03
 17   2.2092      0.00     0.30       0.00    -0.10
 18   2.2092      0.00     0.20       0.00    -0.22
 19   2.2474      0.00     0.30       0.00    -0.15
 20   2.2475      0.00     0.31       0.00    -0.20
 21   2.2475      0.00     0.31       0.00    -0.02
 22   2.2476      0.00     0.13       0.00    -0.15
 23   2.2500      0.00     0.02       0.00    -0.06
 24   2.2501      0.00    -0.05       0.00    -0.12
 25   2.2502      0.00    -0.24       0.00    -0.02
 26   6.3762      0.00     1.02       0.00    -0.38
 27   6.3763      0.00     1.06       0.00    -0.74

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.

12GV1    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        18.420    18.420    18.420
ecceobj         0.551     0.551     0.551
incobj         18.939    18.939    18.939
qmin            8.089     8.039     8.016
qmax           32.137    32.424    30.482
amean          18.927    18.428    17.440
amin           17.291    16.747    15.624
amax           20.479    20.397    19.473
emean           0.545     0.547     0.517
emin            0.518     0.508     0.451
emax            0.569     0.591     0.565
imean          15.823    18.038    18.429
imin           14.219    17.157    15.253
imax           18.711    18.732    20.377
excite_mean     0.610     0.629     0.607
fracstop        0.006     0.007     0.007
cjmean          2.871     2.883     2.967

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        90.4      92.9      95.3
kozaiamp        177.7     177.8     179.3