Orbit Fit and Astrometric record for 02VD131

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: 02VD131   
# Created Tue Dec 12 02:37:18 2017
# Orbit generated from Bernstein formalism
# Fitting   16 observations of   16
# Arc:  10.91y
# First observation: 2002/11/07
#  Last observation: 2013/10/06
Preliminary a, adot, b, bdot, g, gdot:
  -0.000197   0.023290  -0.000003   0.000150   0.023091   0.000000
# Chi-squared of fit:    27.44 DOF:   26 RMS:  0.23
# Min/Max residuals:    -0.91    0.54
# Exact a, adot, b, bdot, g, gdot:
  1.653523E-05  2.297774E-02 -1.852833E-06  1.486425E-04  2.359668E-02  9.398739E-04
# Covariance matrix:
  4.2859E-13 -5.5043E-13  1.6604E-15 -2.9864E-15  4.5805E-13 -1.8293E-12
 -5.5043E-13  1.0340E-12 -2.9705E-15  5.6664E-15 -1.0373E-12  3.4921E-12
  1.6604E-15 -2.9705E-15  1.3699E-13 -1.6055E-14  2.3160E-15 -1.0210E-14
 -2.9864E-15  5.6664E-15 -1.6055E-14  5.6728E-15 -5.4725E-15  1.9287E-14
  4.5805E-13 -1.0373E-12  2.3160E-15 -5.4725E-15  1.5183E-12 -3.4377E-12
 -1.8293E-12  3.4921E-12 -1.0210E-14  1.9287E-14 -3.4377E-12  1.1874E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.781598   20.227144   -0.402956   -0.012343   -0.902357  2452585.665373
# Heliocentric elements and errors
Epoch:              2452580.5000  =  2002/11/02
Mean Anomaly:           46.51909 +/-     0.090
Argument of Peri:      244.37362 +/-     0.096
Long of Asc Node:       84.38731 +/-     0.011
Inclination:             0.85429 +/-     0.000
Eccentricity:         0.06233269 +/-    0.0003
Semi-Major Axis:     45.12015197 +/-    0.0142
Time of Perihelion: 2438275.6603 +/-      26.8
Perihelion:          42.30769131 +/-    0.0181
Aphelion:            47.93261262 +/-    0.0195
Period (y)              303.0847 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.46788002 +/-    0.0021
Ecliptic Y           15.34658268 +/-    0.0008
Ecliptic Z           -0.57815211 +/-    0.0000
Ecliptic XDOT        -0.00082667 +/-    0.0000
Ecliptic YDOT         0.00253596 +/-    0.0000
Ecliptic ZDOT         0.00001597 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.28395977 +/-    0.0020
Geocenter to KBO     42.37884835 +/-    0.0022
# Hcoef:  6.57

The following table shows the complete astrometric record for 02VD131. 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 (02VD131) followed by the observatory code and reference code for the source of the astrometry.

2002 11  07.16463  01 15 54.06   +07 10 50.8   22.3R 02VD131   695  Cg8319      
2002 11  07.27232  01 15 53.63   +07 10 48.2         02VD131   695  Cg8319      
2002 11  30.25812  01 14 35.70   +07 03 15.4   22.4R 02VD131   568  Cg8319      
2002 12  01.24981  01 14 33.05   +07 03 00.4         02VD131   568  Cg8319      
2002 12  01.32144  01 14 32.91   +07 02 58.7         02VD131   568  Cg8319      
2003 10  23.16513  01 21 52.92   +07 47 13.1   23.0R 02VD131   695  Cj4694      
2003 10  23.26048  01 21 52.48   +07 47 10.5         02VD131   695  Cj4694      
2003 11  20.13563  01 20 00.45   +07 36 16.1   22.8R 02VD131   695  Cj4694      
2003 11  20.21942  01 20 00.15   +07 36 14.5         02VD131   695  Cj4694      
2004 09  13.33140  01 29 31.55   +08 33 09.8   22.6R 02VD131   304  Cl4339      
2004 09  13.33377  01 29 31.55   +08 33 09.8         02VD131   304  Cl4339      
2004 09  13.35563  01 29 31.47   +08 33 09.4         02VD131   304  Cl4339      
2004 09  13.35800  01 29 31.46   +08 33 09.2         02VD131   304  Cl4339      
2013 10  05.43707  02 12 22.63   +12 36 41.4   22.6R 02VD131   695  C~0zdT      
2013 10  05.50088  02 12 22.38   +12 36 40.4         02VD131   695  C~0zdT      
2013 10  06.45646  02 12 18.42   +12 36 19.5         02VD131   695  C~0zdT      

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    -0.23       0.00     0.40
  2   0.0003     -6.91    -0.20      -0.00     0.29
  3   0.0632  -1251.99     0.06      17.27    -0.06
  4   0.0659  -1294.19     0.02      18.24    -0.02
  5   0.0661  -1296.76     0.54      17.45    -0.91
  6   0.9582   5767.40     0.02      23.89     0.04
  7   0.9585   5760.36    -0.22      23.92    -0.01
  8   1.0348   3970.14    -0.08      38.98    -0.01
  9   1.0351   3965.40    -0.14      39.17     0.07
 10   1.8512  13129.92    -0.04      58.53     0.06
 11   1.8513  13129.92     0.10      58.53     0.06
 12   1.8513  13128.66     0.13      58.59     0.13
 13   1.8513  13128.45     0.05      58.46    -0.00
 14  10.9111  54979.37    -0.18     330.82    -0.15
 15  10.9113  54975.32     0.20     331.12     0.14
 16  10.9139  54909.33    -0.02     330.92    -0.03

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.

02VD131    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.485    45.529    45.443
ecceobj         0.069     0.070     0.068
incobj          0.853     0.853     0.853
qmin           41.520    41.533    41.531
qmax           49.027    49.091    48.867
amean          45.144    45.188    45.102
amin           44.783    44.825    44.742
amax           45.529    45.568    45.485
emean           0.064     0.064     0.062
emin            0.049     0.050     0.048
emax            0.077     0.078     0.075
imean           0.986     0.983     0.994
imin            0.405     0.410     0.405
imax            1.335     1.329     1.354
excite_mean     0.066     0.067     0.065
fracstop        1.000     1.000     1.000
cjmean          3.110     3.111     3.110

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       190.3     189.5     185.8
kozaiamp        179.9     179.9     179.9