Orbit Fit and Astrometric record for 08RG167

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: 08RG167   
# Created Sat Dec  4 02:10:46 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     40 observations of     40
# Arc:   3.32y
# First observation: 2008/09/06
#  Last observation: 2011/12/31
# Chi-squared of fit:   166.74 DOF:     74 RMS:  0.36
# Min/Max residuals:    -0.92    1.08
# Exact a, adot, b, bdot, g, gdot:
  4.660670E-05  5.493046E-01 -6.032889E-06 -7.959508E-02  1.799434E-01 -8.497693E-02
# Covariance matrix:
  1.5983E-13 -1.0053E-13 -5.7014E-15  1.2627E-14  5.7355E-14 -3.4307E-14
 -1.0053E-13  1.3029E-13  1.3971E-14 -1.7336E-14  3.2559E-14  4.6582E-15
 -5.7014E-15  1.3971E-14  9.3913E-14 -4.0483E-14  9.8481E-15 -1.7281E-15
  1.2627E-14 -1.7336E-14 -4.0483E-14  2.5728E-14  9.7447E-16 -3.3339E-15
  5.7355E-14  3.2559E-14  9.8481E-15  9.7447E-16  1.9083E-13 -7.3728E-14
 -3.4307E-14  4.6582E-15 -1.7281E-15 -3.3339E-15 -7.3728E-14  3.1397E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.458171   -5.134988    0.186191    0.007911   -0.987823  2454715.801364
# Heliocentric elements and errors
Epoch:              2454716.5000  =  2008/09/07
Mean Anomaly:          355.20228 +/-     0.016
Argument of Peri:      204.04390 +/-     0.000
Long of Asc Node:      175.86580 +/-     0.000
Inclination:             8.29187 +/-     0.000
Eccentricity:         0.63201604 +/-    0.0001
Semi-Major Axis:     17.06188135 +/-    0.0000
Time of Perihelion: 2455059.5610 +/-       1.2
Perihelion:           6.27849866 +/-    0.0021
Aphelion:            27.84526405 +/-    0.0021
Period (y)               70.4772 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            6.50350361 +/-    0.0000
Ecliptic Y           -0.77577821 +/-    0.0000
Ecliptic Z            0.04443644 +/-    0.0000
Ecliptic XDOT        -0.00052385 +/-    0.0000
Ecliptic YDOT         0.00844087 +/-    0.0000
Ecliptic ZDOT        -0.00122146 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO    6.54980863 +/-    0.0000
Geocenter to KBO      5.55737549 +/-    0.0000
# Hcoef: 13.10

The following table shows the complete astrometric record for 08RG167. 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 (08RG167) followed by the observatory code and reference code for the source of the astrometry.

2008 09  06.30061  23 40 25.21   -01 37 10.7   20.3V 08RG167   G96  C~3pM6      
2008 09  06.30647  23 40 25.06   -01 37 11.6   21.3V 08RG167   G96  C~3pM6      
2008 09  06.31219  23 40 24.99   -01 37 12.9   21.4V 08RG167   G96  C~3pM6      
2008 09  06.31786  23 40 24.88   -01 37 13.5   21.2V 08RG167   G96  C~3pM6      
2008 11  20.215855 23 26 08.61   -04 08 24.1   21.7V 08RG167   645  C~3qEb      
2008 11  20.216684 23 26 08.61   -04 08 24.2   21.4V 08RG167   645  C~3qEb      
2008 11  20.219172 23 26 08.62   -04 08 24.1   22.2V 08RG167   645  C~3qEb      
2009 01  16.071342 23 44 44.82   -02 42 56.9         08RG167   645  C~3qEb      
2009 01  16.072172 23 44 44.86   -02 42 57.0         08RG167   645  C~3qEb      
2009 01  16.074659 23 44 44.93   -02 42 56.4         08RG167   645  C~3qEb      
2009 09  18.36069  01 47 07.37   +06 25 58.8   21.0V 08RG167   691  C~3pM6      
2009 09  18.37832  01 47 07.21   +06 25 55.4   21.2V 08RG167   691  C~3pM6      
2009 09  18.39594  01 47 06.94   +06 25 53.8   21.1V 08RG167   691  C~3pM6      
2009 09  26.35123  01 45 11.86   +06 05 54.2   21.0V 08RG167   691  C~3pM6      
2009 09  26.36884  01 45 11.57   +06 05 51.4   21.3V 08RG167   691  C~3pM6      
2009 09  26.38644  01 45 11.28   +06 05 48.8   21.1V 08RG167   691  C~3pM6      
2009 10  15.36412  01 39 25.30   +05 14 28.2   20.9V 08RG167   G96  C~3pM6      
2009 10  15.37010  01 39 25.12   +05 14 27.5   20.9V 08RG167   G96  C~3pM6      
2009 10  15.37606  01 39 25.02   +05 14 26.8   20.9V 08RG167   G96  C~3pM6      
2009 10  15.38194  01 39 24.91   +05 14 25.4   20.8V 08RG167   G96  C~3pM6      
2009 11  16.24618  01 29 50.24   +04 01 59.9   21.8V 08RG167   G96  C~3pM6      
2009 11  16.25351  01 29 50.13   +04 01 59.7   21.9V 08RG167   G96  C~3pM6      
2009 11  16.26096  01 29 50.02   +04 01 58.4   21.4V 08RG167   G96  C~3pM6      
2009 11  16.26854  01 29 49.95   +04 01 57.9   21.4V 08RG167   G96  C~3pM6      
2010 11  12.35689  03 38 49.41   +10 58 34.7   21.2V 08RG167   G96  C~3pM6      
2010 11  12.36436  03 38 49.34   +10 58 33.7   22.2V 08RG167   G96  C~3pM6      
2010 11  12.37193  03 38 49.12   +10 58 34.1   21.1V 08RG167   G96  C~3pM6      
2010 11  12.37941  03 38 48.94   +10 58 32.5   21.0V 08RG167   G96  C~3pM6      
2010 12  02.21066  03 31 50.70   +10 29 43.6   21.7V 08RG167   G96  C~3pM6      
2010 12  02.21766  03 31 50.55   +10 29 42.7   21.4V 08RG167   G96  C~3pM6      
2010 12  02.22472  03 31 50.37   +10 29 42.7   20.6V 08RG167   G96  C~3pM6      
2010 12  02.23181  03 31 50.26   +10 29 41.9   20.9V 08RG167   G96  C~3pM6      
2010 12  10.18768  03 29 20.50   +10 21 57.1   21.5V 08RG167   G96  C~3pM6      
2010 12  10.19527  03 29 20.32   +10 21 57.3   21.5V 08RG167   G96  C~3pM6      
2010 12  10.20282  03 29 20.18   +10 21 56.1   20.8V 08RG167   G96  C~3pM6      
2010 12  10.21037  03 29 20.11   +10 21 55.7   21.1V 08RG167   G96  C~3pM6      
2011 12  31.20336  05 06 45.25   +13 29 25.8   21.4V 08RG167   G96  C~3pM6      
2011 12  31.21080  05 06 45.10   +13 29 25.8   21.6V 08RG167   G96  C~3pM6      
2011 12  31.21834  05 06 44.92   +13 29 25.9   22.1V 08RG167   G96  C~3pM6      
2011 12  31.22590  05 06 44.78   +13 29 25.9   22.2V 08RG167   G96  C~3pM6      

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     0.39       0.00    -0.05
     2   0.0000      0.00    -0.22       0.00     0.02
     3   0.0000      0.00     0.32       0.00    -0.34
     4   0.0000      0.00     0.25       0.00    -0.00
     5   0.2051      0.00     0.07       0.00    -0.35
     6   0.2051      0.00     0.02       0.00    -0.44
     7   0.2051      0.00     0.01       0.00    -0.31
     8   0.3608      0.00    -0.16       0.00    -0.15
     9   0.3608      0.00     0.04       0.00    -0.39
    10   0.3608      0.00    -0.11       0.00    -0.24
    11   1.0323      0.00    -0.92       0.00     0.65
    12   1.0324      0.00     0.24       0.00    -0.21
    13   1.0324      0.00    -0.25       0.00     0.73
    14   1.0542      0.00    -0.40       0.00     0.15
    15   1.0543      0.00    -0.39       0.00     0.10
    16   1.0543      0.00    -0.39       0.00     0.25
    17   1.1063      0.00     0.84       0.00    -0.21
    18   1.1063      0.00    -0.05       0.00     0.06
    19   1.1063      0.00     0.27       0.00     0.33
    20   1.1063      0.00     0.40       0.00    -0.11
    21   1.1936      0.00    -0.19       0.00    -0.11
    22   1.1936      0.00    -0.25       0.00     0.39
    23   1.1936      0.00    -0.28       0.00    -0.19
    24   1.1936      0.00     0.31       0.00     0.04
    25   2.1822      0.00    -0.32       0.00     0.01
    26   2.1822      0.00     1.08       0.00    -0.22
    27   2.1823      0.00     0.26       0.00     0.97
    28   2.1823      0.00     0.01       0.00     0.14
    29   2.2366      0.00     0.17       0.00     0.15
    30   2.2366      0.00     0.07       0.00    -0.27
    31   2.2366      0.00    -0.47       0.00     0.20
    32   2.2366      0.00     0.05       0.00    -0.12
    33   2.2584      0.00     0.16       0.00     0.00
    34   2.2584      0.00    -0.47       0.00     0.57
    35   2.2585      0.00    -0.52       0.00    -0.27
    36   2.2585      0.00     0.49       0.00    -0.30
    37   3.3153      0.00     0.28       0.00    -0.41
    38   3.3153      0.00     0.15       0.00    -0.44
    39   3.3153      0.00    -0.39       0.00    -0.37
    40   3.3153      0.00    -0.32       0.00    -0.40

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.

08RG167    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        16.941    16.941    16.942
ecceobj         0.631     0.631     0.631
incobj          8.297     8.297     8.297
qmin            6.250     6.250     6.250
qmax           30.826    29.039    40.508
amean          17.382    17.304    20.045
amin           15.729    16.941    16.942
amax           18.637    17.772    23.623
emean           0.633     0.630     0.671
emin            0.600     0.627     0.628
emax            0.654     0.634     0.715
imean           8.117     7.900     7.937
imin            7.853     7.853     7.054
imax            8.454     7.986     8.276
excite_mean     0.649     0.645     0.685
fracstop        0.001     0.000     0.002
cjmean          2.901     2.909     2.710

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       237.9     213.7     244.0
kozaiamp         31.1      10.8      33.4