Orbit Fit and Astrometric record for 118379

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: 118379    
# Created Thu Apr 24 01:37:40 2014
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   15 observations of   15
# Arc:   5.99y
# First observation: 1999/04/18
#  Last observation: 2005/04/14
# Chi-squared of fit:    39.67 DOF:   24 RMS:  0.29
# Min/Max residuals:    -0.42    0.68
# Exact a, adot, b, bdot, g, gdot:
  1.909961E-05  2.657910E-02 -6.686538E-06 -6.964963E-03  2.618708E-02  5.532988E-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
    4.838215 -140.159905    0.212805    0.083158   -0.985440  2451286.843043
# Heliocentric elements and errors
Epoch:              2451286.5000  =  1999/04/18
Mean Anomaly:           44.82342 +/-     0.000
Argument of Peri:       94.38595 +/-     0.000
Long of Asc Node:       56.99011 +/-     0.000
Inclination:            15.38012 +/-     0.000
Eccentricity:         0.23060246 +/-    0.0000
Semi-Major Axis:     45.00823929 +/-    0.0000
Time of Perihelion: 2437554.3358 +/-       0.0
Perihelion:          34.62922874 +/-    0.0000
Aphelion:            55.38724985 +/-    0.0000
Period (y)              301.9578 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -30.10375907 +/-    0.0000
Ecliptic Y          -24.84715462 +/-    0.0000
Ecliptic Z            3.22054369 +/-    0.0000
Ecliptic XDOT         0.00128805 +/-    0.0000
Ecliptic YDOT        -0.00253355 +/-    0.0000
Ecliptic ZDOT        -0.00067678 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.16605206 +/-    0.0000
Geocenter to KBO     38.18667886 +/-    0.0000
# Hcoef:  7.58

The following table shows the complete astrometric record for 118379. 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 (118379) followed by the observatory code and reference code for the source of the astrometry.

1999 04  18.34230  14 35 56.44   -10 10 06.7   22.4R 118379    695  Ca4930      
1999 04  18.42194  14 35 56.08   -10 10 06.0         118379    695  Ca4930      
1999 04  18.45872  14 35 55.93   -10 10 05.3         118379    695  Ca4930      
1999 05  05.92279  14 34 28.36   -10 04 04.2         118379    950  Ca4930      
1999 05  05.98393  14 34 28.04   -10 04 02.6         118379    950  Ca4930      
1999 05  06.04595  14 34 27.72   -10 04 01.4         118379    950  Ca4930      
2000 05  25.38542  14 38 10.95   -10 48 56.1         118379    568  Cb5145      
2000 05  25.48959  14 38 10.46   -10 48 54.6         118379    568  Cb5145      
2000 05  26.52670  14 38 05.76   -10 48 39.1         118379    568  Cb5145      
2000 06  29.96015  14 36 03.96   -10 43 58.7         118379    950  Cd4116      
2000 06  29.98364  14 36 03.88   -10 43 58.7         118379    950  Cd4116      
2001 03  24.43076  14 48 21.13   -11 57 57.2   23.5R 118379    695  Cc7487      
2001 03  24.50509  14 48 20.86   -11 57 56.0         118379    695  Cc7487      
2005 04  14.33514  15 07 57.45   -15 00 56.6   23.8R 118379    304  Cn3201      
2005 04  14.35911  15 07 57.34   -15 00 56.4         118379    304  Cn3201      

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    -0.19       0.00     0.68
  2   0.0002      0.00     0.15       0.00    -0.33
  3   0.0003      0.00     0.64       0.00    -0.42
  4   0.0481      0.00    -0.03       0.00    -0.36
  5   0.0483      0.00    -0.14       0.00     0.05
  6   0.0485      0.00    -0.17       0.00     0.03
  7   1.1035      0.00     0.21       0.00    -0.02
  8   1.1038      0.00     0.14       0.00    -0.07
  9   1.1066      0.00     0.60       0.00     0.22
 10   1.2009      0.00    -0.02       0.00    -0.22
 11   1.2009      0.00    -0.38       0.00    -0.25
 12   1.9332      0.00     0.09       0.00     0.36
 13   1.9334      0.00     0.14       0.00     0.31
 14   5.9904      0.00     0.01       0.00     0.00
 15   5.9905      0.00     0.00       0.00    -0.19

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.

118379    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        45.001    45.001    45.001
ecceobj         0.231     0.231     0.231
incobj         15.387    15.387    15.387
qmin           33.897    33.719    33.786
qmax           58.149    57.692    57.931
amean          45.614    45.391    45.471
amin           44.978    44.936    44.970
amax           46.301    46.062    46.094
emean           0.236     0.232     0.232
emin            0.211     0.211     0.210
emax            0.257     0.257     0.257
imean          14.460    14.422    14.591
imin           13.259    13.259    13.265
imax           15.469    15.493    15.837
excite_mean     0.343     0.340     0.343
fracstop        1.000     1.000     1.000
cjmean          2.977     2.977     2.975

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       179.5     182.8     182.3
kozaiamp        180.0     180.0     179.8