Orbit Fit and Astrometric record for 385528

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: 385528    
# Created Sat Oct 21 01:36:45 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   23 observations of   23
# Arc:   9.21y
# First observation: 2004/07/22
#  Last observation: 2013/10/07
# Chi-squared of fit:    26.90 DOF:   40 RMS:  0.19
# Min/Max residuals:    -0.37    0.56
# Exact a, adot, b, bdot, g, gdot:
  1.901168E-05  3.260863E-02  1.645404E-06  3.936628E-03  2.758685E-02 -1.123163E-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
    0.767801  -68.854052   -0.157839    0.013548   -1.006914  2453208.943373
# Heliocentric elements and errors
Epoch:              2453208.5000  =  2004/07/22
Mean Anomaly:          356.97610 +/-     0.000
Argument of Peri:       12.66572 +/-     0.000
Long of Asc Node:      285.22400 +/-     0.000
Inclination:             6.92927 +/-     0.000
Eccentricity:         0.33654727 +/-    0.0000
Semi-Major Axis:     56.06129170 +/-    0.0000
Time of Perihelion: 2454496.3289 +/-       0.0
Perihelion:          37.19401721 +/-    0.0000
Aphelion:            74.92856618 +/-    0.0000
Period (y)              419.7617 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           13.58258279 +/-    0.0000
Ecliptic Y          -34.68582492 +/-    0.0000
Ecliptic Z            0.48584132 +/-    0.0000
Ecliptic XDOT         0.00297411 +/-    0.0000
Ecliptic YDOT         0.00126930 +/-    0.0000
Ecliptic ZDOT         0.00038927 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.25359692 +/-    0.0000
Geocenter to KBO     36.24921672 +/-    0.0000
# Hcoef:  8.11

The following table shows the complete astrometric record for 385528. 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 (385528) followed by the observatory code and reference code for the source of the astrometry.

2004 07  22.44263  19 30 55.70   -21 01 05.6   22.9g 385528    568  C~0X5X      
2004 07  22.47042  19 30 55.55   -21 01 05.9   23.4g 385528    568  C~0X5X      
2004 07  22.49397  19 30 55.41   -21 01 06.1   23.3g 385528    568  C~0X5X      
2004 07  23.39510  19 30 50.53   -21 01 14.8         385528    568  C~0X5X      
2004 09  11.25810  19 27 23.98   -21 07 20.7   23.3i 385528    568  C~0X5X      
2004 09  11.30795  19 27 23.86   -21 07 20.9   23.7i 385528    568  C~0X5X      
2004 09  11.35372  19 27 23.77   -21 07 21.2   23.2i 385528    568  C~0X5X      
2005 07  10.30811  19 39 47.79   -20 27 35.5         385528    675  C~0X5X      
2005 07  10.33982  19 39 47.61   -20 27 36.1         385528    675  C~0X5X      
2005 07  10.37442  19 39 47.43   -20 27 36.4         385528    675  C~0X5X      
2005 08  03.12577  19 37 39.10   -20 31 50.8         385528    309  C~0X5X      
2005 08  03.32006  19 37 38.07   -20 31 52.8         385528    309  C~0X5X      
2005 08  03.32420  19 37 38.07   -20 31 52.8         385528    309  C~0X5X      
2006 07  26.24105  19 46 04.12   -19 57 51.6         385528    675  C~0X5X      
2006 07  26.32020  19 46 03.71   -19 57 52.5         385528    675  C~0X5X      
2007 05  16.41328  19 58 47.17   -19 13 48.8         385528    675  C~0X5X      
2007 05  16.44784  19 58 47.12   -19 13 49.1         385528    675  C~0X5X      
2008 05  03.44515  20 06 26.76   -18 38 55.2         385528    695  C~0X5X      
2008 05  04.45459  20 06 26.45   -18 38 51.3         385528    695  C~0X5X      
2008 05  04.45855  20 06 26.45   -18 38 51.0         385528    695  C~0X5X      
2013 10  05.11292  20 33 47.71   -15 55 35.4   23.5R 385528    695  C~0zdZ      
2013 10  06.10743  20 33 46.40   -15 55 41.9         385528    695  C~0zdZ      
2013 10  07.12304  20 33 45.15   -15 55 49.6         385528    695  C~0zdZ      

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    -0.27
  2   0.0001      0.00     0.03       0.00     0.09
  3   0.0001      0.00    -0.12       0.00     0.12
  4   0.0026      0.00    -0.07       0.00     0.25
  5   0.1391      0.00     0.13       0.00     0.26
  6   0.1393      0.00     0.04       0.00     0.23
  7   0.1394      0.00     0.26       0.00     0.08
  8   0.9661      0.00     0.12       0.00    -0.11
  9   0.9662      0.00     0.07       0.00    -0.37
 10   0.9663      0.00     0.25       0.00    -0.30
 11   1.0313      0.00    -0.08       0.00     0.06
 12   1.0318      0.00    -0.29       0.00     0.03
 13   1.0318      0.00     0.03       0.00     0.07
 14   2.0090      0.00     0.00       0.00    -0.13
 15   2.0092      0.00     0.36       0.00    -0.09
 16   2.8144      0.00     0.13       0.00    -0.02
 17   2.8145      0.00     0.33       0.00    -0.29
 18   3.7810      0.00    -0.09       0.00    -0.14
 19   3.7837      0.00    -0.05       0.00    -0.13
 20   3.7838      0.00    -0.03       0.00     0.15
 21   9.2038      0.00    -0.03       0.00    -0.02
 22   9.2065      0.00     0.07       0.00     0.56
 23   9.2093      0.00    -0.07       0.00    -0.26

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.

385528    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        56.180    56.180    56.181
ecceobj         0.338     0.338     0.338
incobj          6.928     6.928     6.928
qmin           36.413    36.254    36.491
qmax           77.131    77.162    76.882
amean          56.196    56.206    56.055
amin           55.502    55.469    55.351
amax           57.069    57.037    56.971
emean           0.337     0.339     0.336
emin            0.325     0.324     0.324
emax            0.352     0.355     0.349
imean           8.452     8.365     8.310
imin            7.804     7.780     7.736
imax            9.050     8.891     8.941
excite_mean     0.368     0.369     0.366
fracstop        1.000     1.000     1.000
cjmean          3.079     3.078     3.080

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       176.0     175.8     169.8
kozaiamp        180.0     179.9     180.0