Orbit Fit and Astrometric record for 04VD131

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: 04VD131   
# Created Mon Oct 23 01:37:34 2017
# Orbit generated from Bernstein formalism
# Fitting   31 observations of   31
# Arc:  13.98y
# First observation: 1999/10/14
#  Last observation: 2013/10/06
Preliminary a, adot, b, bdot, g, gdot:
  -0.000679   0.025930  -0.000173   0.001656   0.028222   0.000000
# Chi-squared of fit:   123.88 DOF:   56 RMS:  0.35
# Min/Max residuals:    -0.71    0.93
# Exact a, adot, b, bdot, g, gdot:
  1.560765E-05  2.563168E-02  3.706506E-06  1.635634E-03  2.488862E-02  1.731492E-03
# Covariance matrix:
  4.5882E-13 -1.0107E-13  1.2940E-14 -4.4910E-15 -2.2963E-14 -1.8897E-13
 -1.0107E-13  3.8418E-14 -6.2787E-15  2.2063E-15  6.0482E-14  9.2673E-14
  1.2940E-14 -6.2787E-15  2.5173E-13 -3.0769E-14 -1.1487E-14 -1.7186E-14
 -4.4910E-15  2.2063E-15 -3.0769E-14  4.6808E-15  4.1319E-15  6.0433E-15
 -2.2963E-14  6.0482E-14 -1.1487E-14  4.1319E-15  2.8369E-13  1.7299E-13
 -1.8897E-13  9.2673E-14 -1.7186E-14  6.0433E-15  1.7299E-13  2.5381E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.083156   37.828937    0.292649    0.001154   -0.945483  2451465.884856
# Heliocentric elements and errors
Epoch:              2451460.5000  =  1999/10/09
Mean Anomaly:           22.72583 +/-     0.013
Argument of Peri:      331.43313 +/-     0.017
Long of Asc Node:       36.13810 +/-     0.000
Inclination:             3.64086 +/-     0.000
Eccentricity:         0.13585238 +/-    0.0001
Semi-Major Axis:     46.84404480 +/-    0.0042
Time of Perihelion: 2444067.8977 +/-       4.0
Perihelion:          40.48017000 +/-    0.0044
Aphelion:            53.20791959 +/-    0.0054
Period (y)              320.6194 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           32.66858265 +/-    0.0007
Ecliptic Y           24.99340024 +/-    0.0005
Ecliptic Z            0.05846778 +/-    0.0000
Ecliptic XDOT        -0.00158360 +/-    0.0000
Ecliptic YDOT         0.00235178 +/-    0.0000
Ecliptic ZDOT         0.00018028 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.13283076 +/-    0.0006
Geocenter to KBO     40.17900250 +/-    0.0009
# Hcoef:  6.75

The following table shows the complete astrometric record for 04VD131. 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 (04VD131) followed by the observatory code and reference code for the source of the astrometry.

1999 10  14.384113 02 21 45.32   +14 11 56.4   22.3V 04VD131   645  C~1Gi6      
1999 10  14.384942 02 21 45.31   +14 11 56.4   22.2V 04VD131   645  C~1Gi6      
1999 10  14.387430 02 21 45.30   +14 11 56.3   24.2V 04VD131   645  C~1Gi6      
2004 11  09.39893  02 47 48.49   +16 44 37.0   22.8g 04VD131   568  C~0VDw      
2004 11  09.42533  02 47 48.36   +16 44 36.4   22.9g 04VD131   568  C~0VDw      
2004 11  09.45131  02 47 48.23   +16 44 36.0   23.0g 04VD131   568  C~0VDw      
2004 11  10.31680  02 47 44.01   +16 44 17.2   22.6g 04VD131   568  C~0VDw      
2005 01  05.25311  02 44 11.03   +16 28 48.4   22.5i 04VD131   568  C~0VDw      
2005 01  05.32315  02 44 10.88   +16 28 47.4   22.3i 04VD131   568  C~0VDw      
2005 01  05.37825  02 44 10.79   +16 28 47.3   22.7i 04VD131   568  C~0VDw      
2006 10  25.42361  03 00 23.38   +17 49 56.8   23.0r 04VD131   568  C~0VDw      
2006 10  25.46291  03 00 23.19   +17 49 56.1   22.8r 04VD131   568  C~0VDw      
2006 10  25.49935  03 00 23.01   +17 49 55.4   22.5r 04VD131   568  C~0VDw      
2006 10  26.37635  03 00 18.83   +17 49 39.1   22.6r 04VD131   568  C~0VDw      
2006 10  26.40880  03 00 18.67   +17 49 38.2   22.6r 04VD131   568  C~0VDw      
2006 10  26.45361  03 00 18.45   +17 49 37.5   22.9r 04VD131   568  C~0VDw      
2006 10  26.61697  03 00 17.65   +17 49 34.3   22.7r 04VD131   568  C~0VDw      
2006 10  27.44593  03 00 13.68   +17 49 18.9   22.6r 04VD131   568  C~0VDw      
2006 10  27.49978  03 00 13.41   +17 49 17.8   21.9r 04VD131   568  C~0VDw      
2006 10  27.54747  03 00 13.19   +17 49 16.9   22.6r 04VD131   568  C~0VDw      
2006 11  24.29889  02 57 56.42   +17 40 06.6         04VD131   695  C~0VDw      
2006 11  24.42674  02 57 55.81   +17 40 04.1         04VD131   695  C~0VDw      
2007 01  15.26811  02 55 03.69   +17 27 58.6         04VD131   568  C~0VDw      
2007 01  15.31770  02 55 03.62   +17 27 59.0         04VD131   568  C~0VDw      
2007 01  15.36109  02 55 03.60   +17 27 58.4         04VD131   568  C~0VDw      
2007 01  16.26706  02 55 02.49   +17 27 53.7         04VD131   568  C~0VDw      
2007 01  16.30728  02 55 02.45   +17 27 53.5         04VD131   568  C~0VDw      
2007 01  16.34715  02 55 02.39   +17 27 52.9         04VD131   568  C~0VDw      
2013 10  05.50998  03 41 35.84   +20 59 56.1   22.5R 04VD131   695  C~0zdg      
2013 10  06.34490  03 41 33.05   +20 59 48.6         04VD131   695  C~0zdg      
2013 10  06.48047  03 41 32.59   +20 59 47.6         04VD131   695  C~0zdg      

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     0.14       0.00    -0.55
  2   0.0000     -0.14     0.06       0.05    -0.50
  3   0.0000     -0.31     0.07      -0.00    -0.55
  4   5.0733  24435.56    -0.71    1709.97     0.84
  5   5.0734  24433.57    -0.69    1709.95     0.78
  6   5.0734  24431.65    -0.63    1710.12     0.93
  7   5.0758  24367.29    -0.11    1710.03     0.23
  8   5.2289  21129.11     0.40    1732.35     0.77
  9   5.2291  21126.73     0.11    1732.04     0.43
 10   5.2293  21125.45     0.46    1732.33     0.71
 11   7.0309  36169.22     0.04    2371.26    -0.26
 12   7.0310  36166.33     0.07    2371.34    -0.23
 13   7.0311  36163.58     0.02    2371.39    -0.23
 14   7.0335  36099.82     0.18    2372.39    -0.08
 15   7.0336  36097.30     0.07    2372.16    -0.36
 16   7.0337  36093.99     0.10    2372.36    -0.22
 17   7.0342  36081.76     0.03    2372.48    -0.30
 18   7.0364  36021.23     0.23    2373.51    -0.07
 19   7.0366  36017.09     0.13    2373.53    -0.12
 20   7.0367  36013.73     0.33    2373.54    -0.16
 21   7.1127  33925.41     0.08    2393.34    -0.12
 22   7.1131  33916.10     0.22    2393.40    -0.12
 23   7.2550  31285.71    -0.37    2395.79    -0.36
 24   7.2551  31284.85    -0.22    2396.47     0.32
 25   7.2552  31284.39     0.20    2395.97    -0.18
 26   7.2577  31267.45    -0.06    2396.00     0.06
 27   7.2578  31266.83     0.09    2395.97     0.03
 28   7.2579  31265.81    -0.18    2395.63    -0.30
 29  13.9771  75669.63     0.14    4777.68     0.03
 30  13.9794  75624.52    -0.19    4778.94    -0.26
 31  13.9797  75617.14    -0.02    4779.40    -0.10

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.

04VD131    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.840    46.852    46.827
ecceobj         0.136     0.136     0.135
incobj          3.641     3.641     3.641
qmin           39.661    39.642    39.630
qmax           53.560    53.578    53.559
amean          46.427    46.439    46.415
amin           46.043    46.036    46.018
amax           46.866    46.880    46.855
emean           0.130     0.130     0.130
emin            0.117     0.117     0.116
emax            0.144     0.143     0.144
imean           2.961     2.962     2.960
imin            2.453     2.454     2.452
imax            3.513     3.512     3.512
excite_mean     0.140     0.140     0.140
fracstop        1.000     1.000     1.000
cjmean          3.107     3.107     3.107

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       176.3     176.4     176.3
kozaiamp        179.9     179.9     180.0