Orbit Fit and Astrometric record for 20108

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: 20108     
# Created Mon Oct 23 01:36:17 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   44 observations of   44
# Arc:  13.32y
# First observation: 1995/08/29
#  Last observation: 2008/12/22
# Chi-squared of fit:   384.07 DOF:   82 RMS:  0.52
# Min/Max residuals:    -1.04    1.73
# Exact a, adot, b, bdot, g, gdot:
  1.689297E-05  3.133188E-02 -7.108951E-06 -1.113434E-02  2.955234E-02  3.265065E-03
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.632590   10.690077    0.569919   -0.009189   -0.827072  2449959.040718
# Heliocentric elements and errors
Epoch:              2449958.5000  =  1995/08/29
Mean Anomaly:           29.54593 +/-     0.000
Argument of Peri:      142.35823 +/-     0.000
Long of Asc Node:      187.99718 +/-     0.000
Inclination:            19.56248 +/-     0.000
Eccentricity:         0.14846373 +/-    0.0000
Semi-Major Axis:     39.51498731 +/-    0.0000
Time of Perihelion: 2442512.2704 +/-       0.0
Perihelion:          33.64844510 +/-    0.0000
Aphelion:            45.38152953 +/-    0.0000
Period (y)              248.3996 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           34.17003882 +/-    0.0000
Ecliptic Y            5.86290927 +/-    0.0000
Ecliptic Z           -0.37382581 +/-    0.0000
Ecliptic XDOT        -0.00024500 +/-    0.0000
Ecliptic YDOT         0.00290683 +/-    0.0000
Ecliptic ZDOT        -0.00103500 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.67133508 +/-    0.0000
Geocenter to KBO     33.83824273 +/-    0.0000
# Hcoef:  7.69

The following table shows the complete astrometric record for 20108. 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 (20108) followed by the observatory code and reference code for the source of the astrometry.

1995 08  29.54001  00 40 17.84   +03 38 58.1   22.5R 20108     568  C26263      
1995 08  29.57501  00 40 17.68   +03 38 56.7         20108     568  C26263      
1995 08  29.61025  00 40 17.54   +03 38 55.7         20108     568  C26263      
1995 08  30.49491  00 40 14.02   +03 38 26.8         20108     568  C26263      
1995 08  30.52679  00 40 13.89   +03 38 25.6         20108     568  C26263      
1995 08  31.51940  00 40 09.78   +03 37 51.8         20108     568  C26263      
1995 08  31.62787  00 40 09.32   +03 37 47.4         20108     568  C26263      
1995 10  24.3414   00 35 44.50   +03 03 22.7         20108     568  C26263      
1995 10  24.3530   00 35 44.45   +03 03 21.8         20108     568  C26263      
1995 10  24.3646   00 35 44.39   +03 03 21.6         20108     568  C26263      
1995 10  24.4601   00 35 43.93   +03 03 18.2         20108     568  C26263      
1995 10  24.4715   00 35 43.88   +03 03 17.3         20108     568  C26263      
1995 10  26.2365   00 35 35.63   +03 02 13.1         20108     568  C26263      
1995 10  26.2691   00 35 35.47   +03 02 11.8         20108     568  C26263      
1995 10  26.2790   00 35 35.43   +03 02 11.3         20108     568  C26263      
1995 10  26.2888   00 35 35.35   +03 02 10.7         20108     568  C26263      
1995 10  26.3314   00 35 35.15   +03 02 09.4         20108     568  C26263      
1995 10  26.3414   00 35 35.09   +03 02 09.1         20108     568  C26263      
1995 10  26.3578   00 35 35.04   +03 02 08.6         20108     568  C26263      
1995 12  23.26757  00 33 11.22   +02 41 22.5         20108     568  C26491      
1995 12  23.37448  00 33 11.24   +02 41 22.5         20108     568  C26491      
1995 12  24.25813  00 33 11.61   +02 41 20.4         20108     568  C26491      
1995 12  24.29281  00 33 11.63   +02 41 20.5         20108     568  C26491      
1996 08  16.16416  00 48 37.03   +03 52 07.5         20108     950  C27881      
1996 08  16.18550  00 48 36.96   +03 52 07.0         20108     950  C27881      
1996 08  16.20012  00 48 36.92   +03 52 06.7         20108     950  C27881      
1996 08  16.21527  00 48 36.88   +03 52 06.3         20108     950  C27881      
1996 08  16.46712  00 48 36.12   +03 51 59.4   23. R 20108     568  C27786      
1996 08  16.51816  00 48 35.97   +03 51 58.2         20108     568  C27786      
1996 08  17.13093  00 48 34.18   +03 51 41.5         20108     950  C27881      
1996 08  17.15263  00 48 34.10   +03 51 40.9         20108     950  C27881      
1996 09  05.35780  00 47 22.85   +03 41 29.8   22.3R 20108     675  C27801      
1996 09  05.39106  00 47 22.70   +03 41 28.6         20108     675  C27801      
1997 09  08.46282  00 54 45.25   +03 46 29.2         20108     675  C30579      
1997 09  08.50934  00 54 45.03   +03 46 27.5         20108     675  C30579      
1997 09  24.44722  00 53 29.28   +03 36 24.3         20108     568  Ca0008      
1997 09  24.54309  00 53 28.79   +03 36 20.5         20108     568  Ca0008      
2000 11  28.20325  01 10 59.95   +03 19 27.5   23.6R 20108     695  Cc3476      
2000 11  29.17169  01 10 57.04   +03 19 09.6   23.3R 20108     695  Cc3476      
2000 11  29.20120  01 10 56.88   +03 19 07.9   23.4R 20108     695  Cc3476      
2000 11  29.27023  01 10 56.72   +03 19 06.5         20108     695  Cc3476      
2008 12  21.21287  02 07 15.67   +03 53 16.5   22.6r 20108     695  C~0hlN      
2008 12  22.20874  02 07 13.47   +03 53 12.6   23.4r 20108     695  C~0hlN      
2008 12  22.29871  02 07 13.09   +03 53 11.1   22.6r 20108     695  C~0hlN      

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    -0.10       0.00    -0.20
  2   0.0001      0.00    -0.31       0.00    -0.01
  3   0.0002      0.00    -0.24       0.00     0.16
  4   0.0026      0.00     0.53       0.00     0.74
  5   0.0027      0.00     0.58       0.00     0.61
  6   0.0054      0.00     0.12       0.00     0.27
  7   0.0057      0.00     0.12       0.00    -0.45
  8   0.1528      0.00    -0.67       0.00     0.19
  9   0.1528      0.00    -0.58       0.00    -0.28
 10   0.1528      0.00    -0.63       0.00    -0.05
 11   0.1531      0.00    -0.55       0.00     0.07
 12   0.1531      0.00    -0.47       0.00    -0.41
 13   0.1580      0.00     0.69       0.00    -0.09
 14   0.1581      0.00     0.62       0.00    -0.21
 15   0.1581      0.00     0.73       0.00    -0.35
 16   0.1581      0.00     0.23       0.00    -0.59
 17   0.1582      0.00     0.29       0.00    -0.35
 18   0.1583      0.00     0.11       0.00    -0.29
 19   0.1583      0.00     0.54       0.00    -0.19
 20   0.3168      0.00     0.51       0.00    -1.04
 21   0.3171      0.00     0.35       0.00    -0.74
 22   0.3196      0.00     0.26       0.00    -0.71
 23   0.3197      0.00     0.36       0.00    -0.54
 24   0.9654      0.00    -0.08       0.00     0.43
 25   0.9655      0.00    -0.17       0.00     0.50
 26   0.9655      0.00    -0.11       0.00     0.60
 27   0.9656      0.00    -0.02       0.00     0.61
 28   0.9663      0.00    -0.54       0.00     0.49
 29   0.9664      0.00    -0.46       0.00     0.67
 30   0.9681      0.00     0.00       0.00     0.74
 31   0.9681      0.00    -0.19       0.00     0.74
 32   1.0207      0.00     0.71       0.00    -0.37
 33   1.0208      0.00     0.67       0.00    -0.39
 34   2.0285      0.00    -0.12       0.00     0.08
 35   2.0287      0.00    -0.30       0.00     0.06
 36   2.0723      0.00    -0.63       0.00    -0.11
 37   2.0726      0.00    -0.59       0.00    -0.15
 38   5.2503      0.00    -0.29       0.00     0.20
 39   5.2529      0.00     0.81       0.00     1.29
 40   5.2530      0.00    -0.20       0.00     0.16
 41   5.2532      0.00     0.63       0.00     0.09
 42  13.3133      0.00    -0.99       0.00    -0.65
 43  13.3160      0.00     1.73       0.00     0.44
 44  13.3162      0.00    -0.72       0.00    -0.63

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.

20108    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.788    39.788    39.788
ecceobj         0.151     0.151     0.151
incobj         19.504    19.504    19.504
qmin           32.185    32.184    32.185
qmax           46.937    46.937    46.936
amean          39.456    39.456    39.456
amin           39.131    39.131    39.132
amax           39.838    39.838    39.837
emean           0.143     0.143     0.143
emin            0.109     0.109     0.109
emax            0.182     0.182     0.182
imean          19.638    19.637    19.639
imin           18.724    18.724    18.725
imax           20.656    20.654    20.658
excite_mean     0.366     0.366     0.366
fracstop        1.000     1.000     1.000
cjmean          2.897     2.897     2.897

libcent 0       180.4     180.4     180.4
libamp  0        43.2      43.2      43.2
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       176.1     176.2     176.3
kozaiamp        180.0     180.0     180.0