Orbit Fit and Astrometric record for 04VA131

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: 04VA131   
# Created Tue Dec 12 02:37:27 2017
# Orbit generated from Bernstein formalism
# Fitting   15 observations of   15
# Arc:   7.94y
# First observation: 2004/11/09
#  Last observation: 2012/10/18
Preliminary a, adot, b, bdot, g, gdot:
  -0.000323   0.025829   0.000004  -0.000341   0.025148   0.000000
# Chi-squared of fit:     7.85 DOF:   24 RMS:  0.13
# Min/Max residuals:    -0.34    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.663483E-05  2.551533E-02 -6.444897E-07 -3.362904E-04  2.487835E-02  1.036812E-04
# Covariance matrix:
  3.3632E-13 -2.2466E-13 -1.9673E-15  2.5747E-15 -2.1394E-13 -8.9869E-13
 -2.2466E-13  2.7400E-13  2.5188E-15 -3.2861E-15 -4.9001E-14  1.1466E-12
 -1.9673E-15  2.5188E-15  1.6931E-13 -2.9097E-14  5.8195E-16  1.1194E-14
  2.5747E-15 -3.2861E-15 -2.9097E-14  1.1762E-14 -8.5469E-16 -1.4621E-14
 -2.1394E-13 -4.9001E-14  5.8195E-16 -8.5469E-16  2.9730E-12  3.0239E-13
 -8.9869E-13  1.1466E-12  1.1194E-14 -1.4621E-14  3.0239E-13  5.1023E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.136304   37.388938   -0.166373   -0.002225   -0.978796  2453318.875253
# Heliocentric elements and errors
Epoch:              2453310.5000  =  2004/11/01
Mean Anomaly:            3.46699 +/-     0.048
Argument of Peri:      185.77511 +/-     0.059
Long of Asc Node:      207.61864 +/-     0.004
Inclination:             0.76599 +/-     0.000
Eccentricity:         0.09352826 +/-    0.0002
Semi-Major Axis:     45.40922111 +/-    0.0147
Time of Perihelion: 2452234.1234 +/-      15.0
Perihelion:          41.16217567 +/-    0.0170
Aphelion:            49.65626655 +/-    0.0192
Period (y)              306.0020 +/-      0.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           32.60859790 +/-    0.0022
Ecliptic Y           25.13534837 +/-    0.0017
Ecliptic Z           -0.09565355 +/-    0.0000
Ecliptic XDOT        -0.00169723 +/-    0.0000
Ecliptic YDOT         0.00223070 +/-    0.0000
Ecliptic ZDOT        -0.00003695 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.17178092 +/-    0.0020
Geocenter to KBO     40.19559885 +/-    0.0028
# Hcoef:  7.48

The following table shows the complete astrometric record for 04VA131. 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 (04VA131) followed by the observatory code and reference code for the source of the astrometry.

2004 11  09.37451  02 20 20.01   +13 50 54.7   23.7g 04VA131   568  C~0VDw      
2004 11  09.40092  02 20 19.89   +13 50 54.1   23.7g 04VA131   568  C~0VDw      
2004 11  09.42696  02 20 19.77   +13 50 53.3   23.8g 04VA131   568  C~0VDw      
2004 11  10.28884  02 20 15.69   +13 50 32.7   23.8g 04VA131   568  C~0VDw      
2005 10  25.49229  02 27 16.45   +14 24 05.0   23.3r 04VA131   568  C~0VDw      
2005 10  25.53041  02 27 16.28   +14 24 04.2   23.3r 04VA131   568  C~0VDw      
2005 10  25.56395  02 27 16.11   +14 24 03.4   23.4r 04VA131   568  C~0VDw      
2006 10  23.23208  02 33 13.14   +14 51 32.8         04VA131   675  C~0VDw      
2006 10  23.27265  02 33 12.96   +14 51 31.7         04VA131   675  C~0VDw      
2006 10  23.31197  02 33 12.75   +14 51 31.3         04VA131   675  C~0VDw      
2006 11  25.20987  02 30 35.99   +14 38 54.5         04VA131   695  C~0VDw      
2006 11  25.30049  02 30 35.58   +14 38 52.8         04VA131   695  C~0VDw      
2012 10  18.42404  03 08 28.44   +17 19 43.9         04VA131   F65  C~0jXG      
2012 10  18.43779  03 08 28.37   +17 19 43.5   23.0R 04VA131   F65  C~0jXG      
2012 10  18.44926  03 08 28.33   +17 19 43.5         04VA131   F65  C~0jXG      

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    -0.09       0.00     0.09
  2   0.0001     -1.85     0.03       0.00     0.08
  3   0.0001     -3.76     0.06      -0.19    -0.11
  4   0.0025    -66.65     0.02      -0.32    -0.05
  5   0.9586   6377.97    -0.17     -66.55     0.13
  6   0.9587   6375.37     0.10     -66.52     0.16
  7   0.9588   6372.77     0.01     -66.49     0.19
  8   1.9517  11821.18    -0.06    -135.89    -0.10
  9   1.9518  11818.35     0.11    -136.12    -0.34
 10   1.9519  11815.32     0.00    -135.55     0.22
 11   2.0420   9412.45    -0.03    -140.83    -0.30
 12   2.0422   9406.25     0.01    -140.57    -0.06
 13   7.9399  44215.84     0.02    -557.54     0.06
 14   7.9399  44214.72    -0.13    -557.66    -0.06
 15   7.9400  44214.14     0.11    -557.50     0.09

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.

04VA131    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.993    46.038    45.948
ecceobj         0.105     0.106     0.104
incobj          0.762     0.762     0.762
qmin           40.281    40.286    40.226
qmax           51.207    51.277    51.142
amean          45.595    45.640    45.552
amin           45.222    45.273    45.190
amax           46.005    46.051    45.953
emean           0.100     0.101     0.100
emin            0.086     0.088     0.086
emax            0.114     0.114     0.113
imean           2.178     2.174     2.181
imin            1.631     1.632     1.631
imax            2.610     2.605     2.618
excite_mean     0.107     0.108     0.107
fracstop        1.000     1.000     1.000
cjmean          3.107     3.107     3.106

libcent 0      -180.0    -180.0     185.5
libamp  0      -180.0    -180.0     142.5
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       198.1     198.3     198.2
kozaiamp        179.9     180.0     180.0