Orbit Fit and Astrometric record for 427581

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: 427581    
# Created Sat Dec 16 02:36:47 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   21 observations of   21
# Arc:  11.16y
# First observation: 2003/08/24
#  Last observation: 2014/10/22
# Chi-squared of fit:    62.49 DOF:   36 RMS:  0.30
# Min/Max residuals:    -0.69    0.57
# Exact a, adot, b, bdot, g, gdot:
  1.550653E-05  2.723235E-02 -1.061927E-06 -1.498559E-03  2.753360E-02  1.616374E-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
   -1.548420  -34.531156   -0.088682   -0.027283   -1.011157  2452875.692713
# Heliocentric elements and errors
Epoch:              2452876.5000  =  2003/08/25
Mean Anomaly:          137.05074 +/-     0.000
Argument of Peri:       61.61079 +/-     0.000
Long of Asc Node:      120.10500 +/-     0.000
Inclination:             3.49590 +/-     0.000
Eccentricity:         0.09621631 +/-    0.0000
Semi-Major Axis:     34.74477459 +/-    0.0000
Time of Perihelion: 2424398.3633 +/-       0.0
Perihelion:          31.40176067 +/-    0.0000
Aphelion:            38.08778852 +/-    0.0000
Period (y)              204.8059 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.79062930 +/-    0.0000
Ecliptic Y          -21.07645432 +/-    0.0000
Ecliptic Z           -0.98145819 +/-    0.0000
Ecliptic XDOT         0.00165877 +/-    0.0000
Ecliptic YDOT         0.00213630 +/-    0.0000
Ecliptic ZDOT        -0.00015313 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.32613626 +/-    0.0000
Geocenter to KBO     36.31927614 +/-    0.0000
# Hcoef:  7.39

The following table shows the complete astrometric record for 427581. 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 (427581) followed by the observatory code and reference code for the source of the astrometry.

2003 08  24.19197  21 53 05.65   -14 29 19.8   21.9R 427581    807  Ci4137      
2003 08  25.20245  21 53 00.39   -14 29 47.9         427581    807  Ci4137      
2003 08  25.30711  21 52 59.85   -14 29 50.8         427581    807  Ci4137      
2003 10  02.27122  21 50 06.68   -14 44 39.5   23.9R 427581    568  Ci6964      
2003 10  02.37985  21 50 06.32   -14 44 41.4         427581    568  Ci6964      
2003 10  24.10362  21 49 10.82   -14 48 57.7   23.5R 427581    695  Cj4699      
2003 10  24.22589  21 49 10.63   -14 48 58.2         427581    695  Cj4699      
2004 07  17.19348  22 02 16.23   -13 45 06.4   22.1R 427581    807  Cl2711      
2004 07  17.29596  22 02 15.78   -13 45 08.9         427581    807  Cl2711      
2004 08  12.26789  22 00 12.54   -13 56 58.7   20.9R 427581    807  Cl2711      
2004 08  12.34177  22 00 12.18   -13 57 00.2         427581    807  Cl2711      
2006 06  21.32051  22 15 38.17   -12 40 47.6   23.1R 427581    304  Cr4836      
2006 06  21.36384  22 15 38.08   -12 40 48.6         427581    304  Cr4836      
2006 08  04.43054  22 13 03.30   -12 57 17.0   23.1R 427581    250  S~06Ad      
2006 08  04.43494  22 13 03.27   -12 57 17.2         427581    250  S~06Ad      
2006 08  04.43934  22 13 03.25   -12 57 17.3         427581    250  S~06Ad      
2006 08  04.44373  22 13 03.23   -12 57 17.4         427581    250  S~06Ad      
2014 09  26.21146  22 55 58.51   -09 25 01.9   23.4R 427581    695  C~1LJE      
2014 09  26.27375  22 55 58.23   -09 25 04.1         427581    695  C~1LJE      
2014 10  22.13779  22 54 15.62   -09 34 46.5   23.4R 427581    G37  C~1BxD      
2014 10  22.24434  22 54 15.33   -09 34 48.3         427581    G37  C~1BxD      

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    -0.13       0.00    -0.69
  2   0.0028      0.00     0.28       0.00     0.11
  3   0.0031      0.00     0.49       0.00     0.10
  4   0.1070      0.00    -0.39       0.00     0.03
  5   0.1073      0.00     0.04       0.00    -0.04
  6   0.1668      0.00    -0.17       0.00     0.15
  7   0.1671      0.00    -0.04       0.00     0.41
  8   0.8980      0.00     0.19       0.00     0.30
  9   0.8983      0.00    -0.05       0.00     0.35
 10   0.9694      0.00    -0.33       0.00    -0.29
 11   0.9696      0.00     0.07       0.00     0.32
 12   2.8258      0.00    -0.07       0.00     0.14
 13   2.8259      0.00    -0.19       0.00    -0.26
 14   2.9466      0.00     0.52       0.00    -0.33
 15   2.9466      0.00     0.39       0.00    -0.41
 16   2.9466      0.00     0.41       0.00    -0.38
 17   2.9466      0.00     0.42       0.00    -0.36
 18  11.0911      0.00    -0.24       0.00     0.29
 19  11.0913      0.00    -0.03       0.00    -0.20
 20  11.1621      0.00    -0.21       0.00     0.21
 21  11.1624      0.00     0.57       0.00     0.18

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.

427581    quality flag:3

Type:           5:4E      5:4E      5:4E

axisobj        34.971    34.971    34.971
ecceobj         0.089     0.089     0.089
incobj          3.490     3.490     3.490
qmin           30.861    30.863    30.859
qmax           39.313    39.312    39.313
amean          34.943    34.943    34.943
amin           34.660    34.660    34.661
amax           35.247    35.248    35.246
emean           0.098     0.098     0.098
emin            0.079     0.079     0.079
emax            0.115     0.115     0.115
imean           2.206     2.206     2.206
imin            0.522     0.522     0.523
imax            3.591     3.591     3.591
excite_mean     0.107     0.107     0.107
fracstop        1.000     1.000     1.000
cjmean          3.004     3.004     3.004

libcent 0       180.2     180.5     180.0
libamp  0        35.2      35.2      35.2
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       179.5     179.6     179.5
kozaiamp        180.0     179.9     179.9