Orbit Fit and Astrometric record for 69986

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: 69986     
# Created Tue Dec 12 02:36:30 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   26 observations of   26
# Arc:   9.85y
# First observation: 1998/11/18
#  Last observation: 2008/09/24
# Chi-squared of fit:    67.94 DOF:   46 RMS:  0.29
# Min/Max residuals:    -0.90    0.65
# Exact a, adot, b, bdot, g, gdot:
  1.788917E-05  3.941529E-02 -6.300659E-06 -9.740110E-03  3.300129E-02  3.533093E-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
    1.189272   49.109761   -0.118495    0.020043   -0.977122  2451135.641301
# Heliocentric elements and errors
Epoch:              2451136.5000  =  1998/11/19
Mean Anomaly:           17.70116 +/-     0.000
Argument of Peri:      146.50024 +/-     0.000
Long of Asc Node:      233.97133 +/-     0.000
Inclination:            13.90932 +/-     0.000
Eccentricity:         0.23160344 +/-    0.0000
Semi-Major Axis:     39.77268711 +/-    0.0000
Time of Perihelion: 2446631.7036 +/-       0.0
Perihelion:          30.56119592 +/-    0.0000
Aphelion:            48.98417830 +/-    0.0000
Period (y)              250.8335 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           20.38984915 +/-    0.0000
Ecliptic Y           23.71825426 +/-    0.0000
Ecliptic Z            0.62875150 +/-    0.0000
Ecliptic XDOT        -0.00226976 +/-    0.0000
Ecliptic YDOT         0.00238388 +/-    0.0000
Ecliptic ZDOT        -0.00080183 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.28407680 +/-    0.0000
Geocenter to KBO     30.30182280 +/-    0.0000
# Hcoef:  8.37

The following table shows the complete astrometric record for 69986. 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 (69986) followed by the observatory code and reference code for the source of the astrometry.

1998 11  18.14057  03 05 15.15   +18 38 37.6   22.3R 69986     695  Ca3208      
1998 11  18.20979  03 05 14.70   +18 38 35.0         69986     695  Ca3208      
1998 11  18.39543  03 05 13.50   +18 38 29.4         69986     695  Ca3208      
1998 11  19.23608  03 05 08.20   +18 38 02.7   24.2R 69986     695  Cj9811      
1998 11  19.30691  03 05 07.73   +18 38 00.3         69986     695  Cj9811      
1998 11  26.34544  03 04 24.05   +18 34 18.1   22.5R 69986     695  Ca3208      
1998 11  26.44358  03 04 23.47   +18 34 15.0         69986     695  Ca3208      
1998 11  27.33580  03 04 18.03   +18 33 47.2         69986     695  Ca3208      
1998 12  17.94858  03 02 25.72   +18 23 45.6         69986     950  Ca3608      
1998 12  17.98913  03 02 25.57   +18 23 44.9         69986     950  Ca3608      
1998 12  18.03117  03 02 25.36   +18 23 43.4         69986     950  Ca3608      
1999 01  22.26777  03 00 47.98   +18 12 34.5   22.5R 69986     568  Ca5544      
1999 01  23.31051  03 00 47.40   +18 12 23.6         69986     568  Ca5544      
1999 11  09.31622  03 16 01.42   +18 47 21.4   23.1R 69986     696  Ca7322      
1999 11  09.37288  03 16 01.07   +18 47 20.1         69986     696  Ca7322      
1999 11  10.40028  03 15 54.50   +18 46 48.7         69986     696  Ca7322      
2002 01  31.04236  03 29 12.08   +18 20 58.6   21.5  69986     304  Cf1458      
2002 01  31.06756  03 29 12.06   +18 20 58.4         69986     304  Cf1458      
2003 10  22.34382  03 56 09.81   +18 51 28.5         69986     304  Ci9217      
2003 10  22.35317  03 56 09.76   +18 51 28.2         69986     304  Ci9217      
2003 10  23.29654  03 56 04.87   +18 51 07.3         69986     304  Ci9217      
2003 10  23.32927  03 56 04.68   +18 51 06.6         69986     304  Ci9217      
2008 09  24.45032  04 42 47.78   +18 15 19.8   26.4R 69986     250  S~06Fv      
2008 09  24.45657  04 42 47.76   +18 15 19.6         69986     250  S~06Fv      
2008 09  24.46351  04 42 47.76   +18 15 19.6         69986     250  S~06Fv      
2008 09  24.46976  04 42 47.73   +18 15 19.3         69986     250  S~06Fv      

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    -0.05       0.00    -0.59
  2   0.0002      0.00     0.09       0.00    -0.02
  3   0.0007      0.00     0.00       0.00     0.29
  4   0.0030      0.00    -0.06       0.00     0.26
  5   0.0032      0.00    -0.29       0.00     0.11
  6   0.0225      0.00     0.28       0.00    -0.05
  7   0.0227      0.00     0.65       0.00    -0.05
  8   0.0252      0.00     0.14       0.00    -0.06
  9   0.0816      0.00    -0.90       0.00    -0.37
 10   0.0817      0.00    -0.24       0.00     0.01
 11   0.0818      0.00    -0.38       0.00    -0.37
 12   0.1783      0.00     0.51       0.00     0.08
 13   0.1812      0.00     0.22       0.00    -0.41
 14   0.9752      0.00     0.11       0.00    -0.26
 15   0.9753      0.00     0.37       0.00     0.15
 16   0.9781      0.00     0.33       0.00    -0.30
 17   3.2030      0.00     0.13       0.00     0.36
 18   3.2031      0.00     0.01       0.00     0.30
 19   4.9260      0.00    -0.21       0.00     0.13
 20   4.9260      0.00    -0.22       0.00     0.05
 21   4.9286      0.00     0.25       0.00     0.31
 22   4.9286      0.00     0.03       0.00     0.35
 23   9.8516      0.00     0.22       0.00    -0.03
 24   9.8517      0.00     0.03       0.00    -0.14
 25   9.8517      0.00     0.16       0.00    -0.04
 26   9.8517      0.00    -0.17       0.00    -0.25

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.

69986    quality flag:3

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

axisobj        39.846    39.846    39.846
ecceobj         0.232     0.232     0.232
incobj         13.896    13.896    13.896
qmin           27.247    27.248    27.247
qmax           52.005    52.005    52.005
amean          39.454    39.454    39.454
amin           39.066    39.067    39.065
amax           39.933    39.933    39.933
emean           0.255     0.255     0.255
emin            0.180     0.180     0.180
emax            0.307     0.307     0.307
imean          12.941    12.942    12.941
imin            9.842     9.846     9.839
imax           16.590    16.590    16.590
excite_mean     0.343     0.343     0.343
fracstop        1.000     1.000     1.000
cjmean          2.917     2.917     2.917

libcent 0       179.6     179.5     179.6
libamp  0        47.7      47.7      47.7
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        83.3      83.4      83.3
kozaiamp         68.6      68.6      68.7