Orbit Fit and Astrometric record for 02CD251

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: 02CD251   
# Created Sat Oct 21 01:37:17 2017
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   21
# Arc:  11.09y
# First observation: 2002/02/08
#  Last observation: 2013/03/14
Preliminary a, adot, b, bdot, g, gdot:
  -0.000561   0.023550  -0.000001  -0.000089   0.023432   0.000000
# Chi-squared of fit:    32.33 DOF:   34 RMS:  0.22
# Min/Max residuals:    -0.90    0.46
# Exact a, adot, b, bdot, g, gdot:
  1.524064E-05  2.319901E-02 -2.158148E-07 -8.936087E-05  2.406069E-02  3.527418E-04
# Covariance matrix:
  2.5079E-13 -1.4297E-13  1.1618E-16  5.2905E-16  1.4201E-13 -5.1813E-13
 -1.4297E-13  1.4421E-13  2.1094E-16 -5.7582E-16 -6.1292E-14  5.4846E-13
  1.1618E-16  2.1094E-16  1.1020E-13 -1.3821E-14  1.1947E-15  7.0110E-16
  5.2905E-16 -5.7582E-16 -1.3821E-14  5.1721E-15  2.2977E-16 -2.2690E-15
  1.4201E-13 -6.1292E-14  1.1947E-15  2.2977E-16  3.7798E-13 -2.7748E-13
 -5.1813E-13  5.4846E-13  7.0110E-16 -2.2690E-15 -2.7748E-13  2.1671E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.445816  147.583643    0.137800    0.024501   -0.973801  2452313.721073
# Heliocentric elements and errors
Epoch:              2452310.5000  =  2002/02/05
Mean Anomaly:           66.61761 +/-     0.257
Argument of Peri:       30.33170 +/-     0.265
Long of Asc Node:       48.77625 +/-     0.007
Inclination:             1.42874 +/-     0.000
Eccentricity:         0.01558645 +/-    0.0001
Semi-Major Axis:     42.79332330 +/-    0.0050
Time of Perihelion: 2433389.2865 +/-      72.9
Perihelion:          42.12632732 +/-    0.0061
Aphelion:            43.46031929 +/-    0.0062
Period (y)              279.9447 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.82164004 +/-    0.0009
Ecliptic Y           22.91628061 +/-    0.0006
Ecliptic Z            1.04865811 +/-    0.0000
Ecliptic XDOT        -0.00145770 +/-    0.0000
Ecliptic YDOT        -0.00220751 +/-    0.0000
Ecliptic ZDOT        -0.00000894 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.53757746 +/-    0.0008
Geocenter to KBO     41.56156912 +/-    0.0011
# Hcoef:  7.04

The following table shows the complete astrometric record for 02CD251. 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 (02CD251) followed by the observatory code and reference code for the source of the astrometry.

2002 02  08.22033  10 01 08.51   +13 40 09.4   23.0R 02CD251   695  Cf5629      
2002 02  08.31382  10 01 08.07   +13 40 11.9         02CD251   695  Cf5629      
2002 03  18.17516  09 58 16.74   +13 55 09.5   23.2R 02CD251   695  Cf5629      
2002 03  18.23602  09 58 16.55   +13 55 10.7         02CD251   695  Cf5629      
2002 04  06.16343  09 57 11.67   +14 00 27.1         02CD251   696  Cf5629      
2002 04  06.22481  09 57 11.50   +14 00 27.7         02CD251   696  Cf5629      
2002 04  06.25210  09 57 11.42   +14 00 28.5         02CD251   696  Cf5629      
2003 01  28.403760 10 07 05.71   +13 07 26.6   22.8V 02CD251   645  C~2Jx6      
2003 01  28.404589 10 07 05.69   +13 07 26.4   22.2V 02CD251   645  C~2Jx6      
2003 01  28.407077 10 07 05.70   +13 07 26.4   24.4V 02CD251   645  C~2Jx6      
2003 03  07.20235  10 04 12.18   +13 23 13.5   22.6R 02CD251   662  Ck0860      
2003 03  07.37417  10 04 11.40   +13 23 17.0         02CD251   662  Ck0860      
2003 12  18.51995  10 14 15.81   +12 26 24.3   23.5R 02CD251   568  Ck9583      
2003 12  18.61373  10 14 15.68   +12 26 25.2         02CD251   568  Ck9583      
2004 02  22.33208  10 10 19.34   +12 49 26.6   23.1R 02CD251   695  Ck0860      
2004 02  22.38762  10 10 19.09   +12 49 28.1         02CD251   695  Ck0860      
2005 03  11.20766  10 14 04.48   +12 28 02.1   23.2R 02CD251   695  Cn0182      
2005 03  11.27192  10 14 04.17   +12 28 04.0         02CD251   695  Cn0182      
2013 03  13.33704  10 53 48.62   +08 29 42.9   23.0R 02CD251   695  C~0ucs      
2013 03  14.31075  10 53 44.29   +08 30 08.8         02CD251   695  C~0ucs      
2013 03  14.42080  10 53 43.79   +08 30 11.7         02CD251   695  C~0ucs      

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     0.00       0.00     0.03
  2   0.0003     -6.88    -0.02       0.13     0.16
  3   0.1039  -2659.30    -0.90     -16.14    -0.16
  4   0.1041  -2662.31    -0.12     -15.96     0.11
  5   0.1559  -3658.24     0.29     -41.90     0.03
  6   0.1561  -3660.77     0.46     -42.18    -0.13
  7   0.1561  -3662.14     0.28     -41.83     0.28
  8   0.9697   5570.80     0.01     -23.76     0.01
  9   0.9697   5570.60    -0.14     -24.05    -0.28
 10   0.9697   5570.74     0.17     -24.00    -0.23
 11   1.0732   2864.87 (  -0.27)    -23.14 (   0.93)
 12   1.0737   2852.98    -0.12     -23.83     0.43
 13   1.8571  12339.99    -0.02     -95.97    -0.03
 14   1.8573  12337.89     0.22     -95.81    -0.00
 15   2.0373   8603.77    -0.08     -36.09    -0.07
 16   2.0374   8599.81     0.08     -35.99     0.07
 17   3.0855  12149.37     0.18     -63.93    -0.28
 18   3.0857  12144.44    -0.29     -63.78    -0.05
 19  11.0914  51096.31     0.07    -212.87     0.10
 20  11.0940  51022.81    -0.00    -213.86     0.02
 21  11.0943  51014.37    -0.07    -214.06    -0.02

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.

02CD251    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.519    42.534    42.504
ecceobj         0.015     0.015     0.015
incobj          1.429     1.429     1.429
qmin           40.518    40.496    40.522
qmax           44.898    44.929    44.859
amean          42.621    42.637    42.608
amin           42.299    42.311    42.292
amax           42.952    42.975    42.945
emean           0.026     0.026     0.026
emin            0.003     0.003     0.004
emax            0.046     0.046     0.045
imean           1.417     1.409     1.426
imin            0.232     0.224     0.241
imax            2.041     2.034     2.050
excite_mean     0.037     0.037     0.037
fracstop        1.000     1.000     1.000
cjmean          3.084     3.084     3.083

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       179.0     177.7     179.9
kozaiamp        180.0     180.0     179.9