Orbit Fit and Astrometric record for 306792

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: 306792    
# Created Sat Oct 21 01:36:41 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   30 observations of   30
# Arc:   8.24y
# First observation: 2001/05/23
#  Last observation: 2009/08/19
# Chi-squared of fit:    41.10 DOF:   54 RMS:  0.21
# Min/Max residuals:    -0.37    0.93
# Exact a, adot, b, bdot, g, gdot:
  1.540797E-05  2.862881E-02  4.207248E-06  7.934733E-03  2.797978E-02 -4.231911E-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
   -1.992388 -118.481558   -0.009898   -0.035550   -1.018258  2452052.687403
# Heliocentric elements and errors
Epoch:              2452052.5000  =  2001/05/23
Mean Anomaly:          302.86356 +/-     0.000
Argument of Peri:       66.28171 +/-     0.000
Long of Asc Node:      248.46292 +/-     0.000
Inclination:            15.66573 +/-     0.000
Eccentricity:         0.15418550 +/-    0.0000
Semi-Major Axis:     39.29817230 +/-    0.0000
Time of Perihelion: 2466333.7961 +/-       0.0
Perihelion:          33.23896405 +/-    0.0000
Aphelion:            45.35738055 +/-    0.0000
Period (y)              246.3580 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -17.50652954 +/-    0.0000
Ecliptic Y          -32.29069534 +/-    0.0000
Ecliptic Z           -1.24241668 +/-    0.0000
Ecliptic XDOT         0.00263839 +/-    0.0000
Ecliptic YDOT        -0.00099358 +/-    0.0000
Ecliptic ZDOT         0.00079054 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.75210725 +/-    0.0000
Geocenter to KBO     35.74022225 +/-    0.0000
# Hcoef:  7.25

The following table shows the complete astrometric record for 306792. 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 (306792) followed by the observatory code and reference code for the source of the astrometry.

2001 05  23.18666  15 55 51.94   -22 24 55.9   21.5R 306792    807  Ce6595      
2001 05  23.25068  15 55 51.57   -22 24 54.5         306792    807  Ce6595      
2001 06  12.20844  15 54 00.73   -22 17 46.5   22.2  306792    304  Ce6595      
2001 06  12.28059  15 54 00.35   -22 17 45.3         306792    304  Ce6595      
2001 08  19.02715  15 51 02.24   -22 00 59.5   21.5R 306792    807  Ce6595      
2001 08  20.02430  15 51 03.07   -22 00 54.2         306792    807  Ce6595      
2001 08  21.03187  15 51 04.05   -22 00 49.8         306792    807  Ce6595      
2002 04  06.27613  16 07 06.54   -22 30 56.2   20.7R 306792    807  Cf4617      
2002 04  06.40839  16 07 06.07   -22 30 54.5         306792    807  Cf4617      
2002 05  12.03395  16 04 18.22   -22 21 29.3         306792    950  Cf4617      
2002 05  12.07964  16 04 17.98   -22 21 28.6         306792    950  Cf4617      
2002 05  12.12508  16 04 17.71   -22 21 27.7         306792    950  Cf4617      
2002 05  13.04247  16 04 12.58   -22 21 09.8         306792    950  Cf4617      
2002 05  13.11194  16 04 12.18   -22 21 08.5         306792    950  Cf4617      
2002 07  06.22158  15 59 28.99   -22 03 17.1   23.4R 306792    695  Cf8904      
2002 07  06.24780  15 59 28.89   -22 03 16.8   23.5R 306792    695  Cf8904      
2002 07  06.27463  15 59 28.78   -22 03 16.3   23.3R 306792    695  Cf8904      
2004 04  22.48664  16 20 47.56   -22 07 58.9   22.5R 306792    568  Ck9562      
2004 04  22.53950  16 20 47.32   -22 07 58.0         306792    568  Ck9562      
2004 06  19.23705  16 15 31.99   -21 50 53.9   22.8R 306792    688  Ck9810      
2004 06  19.28440  16 15 31.81   -21 50 53.3         306792    688  Ck9810      
2005 05  12.46319  16 26 37.54   -21 51 18.7   23.2g 306792    568  C~0UqF      
2005 05  12.48946  16 26 37.39   -21 51 18.3   23.1g 306792    568  C~0UqF      
2005 05  12.52077  16 26 37.22   -21 51 17.8   23.3g 306792    568  C~0UqF      
2005 05  13.54546  16 26 31.52   -21 51 00.2   23.4g 306792    568  C~0UqF      
2005 07  31.26875  16 20 17.51   -21 30 26.3   22.2i 306792    568  C~0UqF      
2005 07  31.31382  16 20 17.42   -21 30 25.9   22.3i 306792    568  C~0UqF      
2005 07  31.35856  16 20 17.32   -21 30 25.4   22.2i 306792    568  C~0UqF      
2009 08  18.18138  16 49 42.71   -20 34 37.1         306792    675  C~0UqF      
2009 08  19.16372  16 49 41.85   -20 34 33.7         306792    675  C~0UqF      

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    -0.04       0.00     0.13
  2   0.0002      0.00     0.28       0.00     0.04
  3   0.0548      0.00    -0.30       0.00     0.36
  4   0.0550      0.00    -0.24       0.00     0.00
  5   0.2405      0.00     0.16       0.00    -0.31
  6   0.2432      0.00    -0.13       0.00    -0.03
  7   0.2460      0.00    -0.03       0.00    -0.35
  8   0.8709      0.00     0.01       0.00     0.02
  9   0.8712      0.00    -0.04       0.00     0.18
 10   0.9688      0.00    -0.01       0.00    -0.08
 11   0.9689      0.00     0.29       0.00    -0.25
 12   0.9690      0.00     0.11       0.00    -0.23
 13   0.9715      0.00     0.20       0.00    -0.03
 14   0.9717      0.00     0.15       0.00    -0.07
 15   1.1199      0.00     0.02       0.00     0.07
 16   1.1199      0.00     0.09       0.00    -0.09
 17   1.1200      0.00     0.04       0.00    -0.06
 18   2.9166      0.00     0.22       0.00     0.14
 19   2.9168      0.00     0.30       0.00     0.27
 20   3.0747      0.00    -0.16       0.00     0.12
 21   3.0749      0.00     0.93       0.00    -0.14
 22   3.9706      0.00    -0.06       0.00     0.08
 23   3.9707      0.00    -0.09       0.00     0.03
 24   3.9708      0.00     0.00       0.00    -0.00
 25   3.9736      0.00    -0.37       0.00     0.22
 26   4.1891      0.00    -0.21       0.00     0.01
 27   4.1893      0.00    -0.08       0.00    -0.03
 28   4.1894      0.00    -0.13       0.00     0.02
 29   8.2382      0.00     0.13       0.00    -0.32
 30   8.2409      0.00     0.08       0.00     0.03

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.

306792    quality flag:3

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

axisobj        39.323    39.323    39.324
ecceobj         0.156     0.156     0.156
incobj         15.659    15.659    15.659
qmin           31.929    31.929    31.929
qmax           47.373    47.379    47.365
amean          39.457    39.457    39.457
amin           39.070    39.071    39.062
amax           39.907    39.906    39.908
emean           0.163     0.163     0.163
emin            0.133     0.133     0.133
emax            0.189     0.189     0.189
imean          16.803    16.804    16.803
imin           16.116    16.100    16.118
imax           17.577    17.577    17.577
excite_mean     0.332     0.332     0.332
fracstop        1.000     1.000     1.000
cjmean          2.925     2.925     2.925

libcent 0       179.7     179.9     179.3
libamp  0        75.8      76.2      75.4
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       181.8     181.7     181.7
kozaiamp        180.0     180.0     180.0