Orbit Fit and Astrometric record for 04OP15

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: 04OP15    
# Created Fri Nov 16 02:08:28 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   18 observations of   18
# Arc:  12.94y
# First observation: 2004/07/24
#  Last observation: 2017/07/04
# Chi-squared of fit:     9.25 DOF:   30 RMS:  0.13
# Min/Max residuals:    -0.31    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.473789E-05  2.456522E-02  5.825730E-06  1.038016E-02  2.649476E-02 -1.662099E-03
# Covariance matrix:
  1.7932E-13 -1.0784E-13  3.3554E-14 -3.7819E-14  6.9014E-14 -2.6245E-13
 -1.0784E-13  1.9167E-13 -6.4305E-14  7.2668E-14 -2.6231E-13  5.0435E-13
  3.3554E-14 -6.4305E-14  1.3872E-13 -3.8136E-14  8.6067E-14 -1.7392E-13
 -3.7819E-14  7.2668E-14 -3.8136E-14  3.3021E-14 -9.7689E-14  1.9649E-13
  6.9014E-14 -2.6231E-13  8.6067E-14 -9.7689E-14  6.4527E-13 -6.7814E-13
 -2.6245E-13  5.0435E-13 -1.7392E-13  1.9649E-13 -6.7814E-13  1.3637E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.386796  -74.440386   -0.287546   -0.023611   -0.977503  2453210.931503
# Heliocentric elements and errors
Epoch:              2453210.5000  =  2004/07/24
Mean Anomaly:          267.41339 +/-     0.139
Argument of Peri:       95.19532 +/-     0.120
Long of Asc Node:      289.16944 +/-     0.000
Inclination:            22.98351 +/-     0.000
Eccentricity:         0.05331370 +/-    0.0001
Semi-Major Axis:     38.51810559 +/-    0.0055
Time of Perihelion: 2475666.9693 +/-      36.4
Perihelion:          36.46456299 +/-    0.0056
Aphelion:            40.57164818 +/-    0.0061
Period (y)              239.0593 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           10.65708771 +/-    0.0003
Ecliptic Y          -37.21267143 +/-    0.0011
Ecliptic Z           -0.91320079 +/-    0.0000
Ecliptic XDOT         0.00240424 +/-    0.0000
Ecliptic YDOT         0.00081433 +/-    0.0000
Ecliptic ZDOT         0.00107659 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.71941155 +/-    0.0011
Geocenter to KBO     37.74337536 +/-    0.0011
# Hcoef:  7.02

The following table shows the complete astrometric record for 04OP15. 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 (04OP15) followed by the observatory code and reference code for the source of the astrometry.

2004 07  24.43076  19 08 13.84   -23 54 33.9   22.9g 04OP15    568  C~0V8G      
2004 07  24.45637  19 08 13.69   -23 54 33.9   23.2g 04OP15    568  C~0V8G      
2004 07  24.49529  19 08 13.48   -23 54 34.0   23.2g 04OP15    568  C~0V8G      
2004 07  25.41657  19 08 08.46   -23 54 36.1         04OP15    568  C~0V8G      
2004 09  10.23503  19 05 01.19   -23 53 51.7         04OP15    568  C~0V8G      
2004 09  10.27976  19 05 01.10   -23 53 51.5         04OP15    568  C~0V8G      
2004 09  10.32099  19 05 01.01   -23 53 51.4         04OP15    568  C~0V8G      
2005 06  12.48541  19 17 54.28   -23 05 52.2         04OP15    568  C~0V8G      
2005 06  12.51114  19 17 54.14   -23 05 52.2   23.0r 04OP15    568  C~0V8G      
2005 06  13.49081  19 17 49.24   -23 05 55.8   22.3r 04OP15    568  C~0V8G      
2006 07  03.44518  19 21 46.48   -22 20 20.7   22.6r 04OP15    568  C~0V8G      
2006 07  03.46648  19 21 46.37   -22 20 21.0   22.5r 04OP15    568  C~0V8G      
2006 07  03.48762  19 21 46.24   -22 20 21.1   22.5r 04OP15    568  C~0V8G      
2008 05  03.42233  19 36 59.78   -20 41 47.7         04OP15    695  C~0V8G      
2008 05  03.48886  19 36 59.69   -20 41 47.5         04OP15    695  C~0V8G      
2008 05  03.48986  19 36 59.69   -20 41 47.5         04OP15    695  C~0V8G      
2017 07  04.36960  20 21 59.19   -12 52 00.2   22.5R 04OP15    G37  C~2IX9      
2017 07  04.40848  20 21 58.99   -12 52 00.5         04OP15    G37  C~2IX9      

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    -0.03       0.00     0.07
  2   0.0001      0.00    -0.14       0.00     0.13
  3   0.0002      0.00    -0.04       0.00     0.10
  4   0.0027      0.00    -0.02       0.00     0.07
  5   0.1309      0.00    -0.01       0.00     0.18
  6   0.1310      0.00     0.06       0.00     0.17
  7   0.1311      0.00     0.01       0.00     0.07
  8   0.8845      0.00    -0.09       0.00    -0.20
  9   0.8845      0.00    -0.22       0.00    -0.10
 10   0.8872      0.00     0.02       0.00     0.17
 11   1.9412      0.00     0.05       0.00    -0.12
 12   1.9412      0.00     0.23       0.00    -0.31
 13   1.9413      0.00     0.10       0.00    -0.30
 14   3.7755      0.00     0.02       0.00     0.03
 15   3.7757      0.00     0.06       0.00    -0.04
 16   3.7757      0.00     0.08       0.00    -0.05
 17  12.9444      0.00    -0.03       0.00     0.07
 18  12.9445      0.00    -0.07       0.00     0.05

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.

04OP15    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        38.530    38.530    38.530
ecceobj         0.058     0.058     0.058
incobj         22.971    22.971    22.971
qmin           35.879    35.882    35.874
qmax           41.550    41.545    41.534
amean          38.629    38.630    38.630
amin           38.340    38.346    38.340
amax           38.923    38.928    38.921
emean           0.054     0.054     0.054
emin            0.041     0.041     0.041
emax            0.068     0.068     0.068
imean          24.564    24.563    24.563
imin           23.880    23.875    23.874
imax           25.276    25.276    25.275
excite_mean     0.419     0.419     0.419
fracstop        1.000     1.000     1.000
cjmean          2.837     2.837     2.837

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       178.1     178.1     178.0
kozaiamp        179.8     179.9     180.0