Orbit Fit and Astrometric record for 02CU154

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: 02CU154   
# Created Thu Dec 14 02:37:10 2017
# Orbit generated from Bernstein formalism
# Fitting   25 observations of   26
# Arc:  13.19y
# First observation: 2002/02/06
#  Last observation: 2015/04/15
Preliminary a, adot, b, bdot, g, gdot:
  -0.002534   0.025475  -0.000126   0.001333   0.022209   0.000000
# Chi-squared of fit:    62.40 DOF:   44 RMS:  0.28
# Min/Max residuals:    -0.74    0.70
# Exact a, adot, b, bdot, g, gdot:
  1.591882E-05  2.501145E-02 -3.280778E-07  1.304615E-03  2.485978E-02 -3.033749E-04
# Covariance matrix:
  2.5671E-13 -8.1452E-14  6.4726E-15 -3.6291E-15  8.0855E-14 -2.2184E-13
 -8.1452E-14  4.5993E-14 -3.7120E-15  2.3354E-15 -1.5267E-14  1.3977E-13
  6.4726E-15 -3.7120E-15  1.3223E-13 -1.4323E-14  3.2934E-15 -1.2141E-14
 -3.6291E-15  2.3354E-15 -1.4323E-14  2.8411E-15 -8.1189E-16  7.5417E-15
  8.0855E-14 -1.5267E-14  3.2934E-15 -8.1189E-16  1.6777E-13 -6.1802E-14
 -2.2184E-13  1.3977E-13 -1.2141E-14  7.5417E-15 -6.1802E-14  4.5238E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.563672  135.933510   -0.026669    0.026747   -0.982570  2452311.708613
# Heliocentric elements and errors
Epoch:              2452310.5000  =  2002/02/05
Mean Anomaly:          352.16347 +/-     0.025
Argument of Peri:       36.08531 +/-     0.029
Long of Asc Node:      108.86071 +/-     0.001
Inclination:             3.34691 +/-     0.000
Eccentricity:         0.06530633 +/-    0.0001
Semi-Major Axis:     44.05773600 +/-    0.0034
Time of Perihelion: 2454635.6622 +/-       7.5
Perihelion:          41.18048696 +/-    0.0040
Aphelion:            46.93498503 +/-    0.0044
Period (y)              292.4432 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -29.61671055 +/-    0.0005
Ecliptic Y           28.63577690 +/-    0.0005
Ecliptic Z            1.09765845 +/-    0.0000
Ecliptic XDOT        -0.00189746 +/-    0.0000
Ecliptic YDOT        -0.00200587 +/-    0.0000
Ecliptic ZDOT         0.00014293 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.21118922 +/-    0.0005
Geocenter to KBO     40.22561465 +/-    0.0007
# Hcoef:  6.91

The following table shows the complete astrometric record for 02CU154. 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 (02CU154) followed by the observatory code and reference code for the source of the astrometry.

2002 02  06.20787  09 15 31.36   +17 33 10.0   22.2R 02CU154   695  Cf0336      
2002 02  06.30231  09 15 30.90   +17 33 12.0         02CU154   695  Cf0336      
2002 02  07.25891  09 15 26.09   +17 33 34.5         02CU154   695  Cf0336      
2002 03  08.39340  09 13 09.43   +17 43 46.3   21.7R 02CU154   568  Cf2717      
2002 03  08.47157  09 13 09.11   +17 43 47.6         02CU154   568  Cf2717      
2002 03  13.30877  09 12 49.93   +17 45 11.4         02CU154   696  Cf5529      
2003 03  06.18484  09 19 09.39   +17 21 27.1   22.6R 02CU154   662  Ci0065      
2003 03  06.27352  09 19 09.04   +17 21 29.0         02CU154   662  Ci0065      
2003 04  29.28933  09 17 02.00   +17 29 56.5   23.2R 02CU154   568  Ci0065      
2003 04  30.28578  09 17 02.08   +17 29 54.4         02CU154   568  Ci0065      
2005 03  12.202045 09 30 17.59   +16 38 30.9         02CU154   645  C~1GLI      
2005 03  12.202875 09 30 17.58   +16 38 31.0         02CU154   645  C~1GLI      
2005 03  12.205362 09 30 17.57   +16 38 31.0         02CU154   645  C~1GLI      
2006 05  01.20071  09 34 06.38   +16 23 19.3   23.2R 02CU154   695  Cr3562      
2006 05  01.29035  09 34 06.36   +16 23 18.5         02CU154   695  Cr3562      
2006 05  02.19662  09 34 06.24   +16 23 18.0         02CU154   695  Cr3562      
2008 10  27.04263  09 58 21.96   +14 28 54.2         02CU154   250  S~06AS      
2008 10  27.04888  09 58 21.94   +14 28 54.1         02CU154   250  S~06AS      
2008 10  27.05583  09 58 21.97   +14 28 54.0         02CU154   250  S~06AS      
2008 10  27.10305  09 58 22.12   +14 28 53.4         02CU154   250  S~06AS      
2013 03  13.25950  10 15 37.91   +13 17 00.9   23.2R 02CU154   695  C~0ucs      
2013 03  14.21830  10 15 33.70   +13 17 23.8         02CU154   695  C~0ucs      
2013 03  14.36868  10 15 33.03   +13 17 27.5         02CU154   695  C~0ucs      
2015 04  15.18755  10 24 48.17   +12 32 04.9   23.2R 02CU154   695  C~1RHO      
2015 04  15.26016  10 24 47.99   +12 32 05.9         02CU154   695  C~1RHO      
2015 04  15.33874  10 24 47.75   +12 32 06.7         02CU154   695  C~1RHO      

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     0.24
  2   0.0003     -6.88     0.33      -0.06     0.13
  3   0.0029    -79.25    -0.09       0.78     0.32
  4   0.0826  -2126.35    -0.26       2.17    -0.08
  5   0.0829  -2131.10    -0.13       2.05    -0.11
  6   0.0961  -2417.68 (   0.10)      0.81 (   1.54)
  7   1.0759   3186.69     0.23     272.29     0.26
  8   1.0762   3181.34     0.70     272.58     0.61
  9   1.2240   1294.68    -0.65     205.34    -0.01
 10   1.2268   1296.41    -0.61     203.68     0.00
 11   3.0938  13114.85     0.36     806.98    -0.16
 12   3.0938  13114.68     0.25     807.03    -0.11
 13   3.0938  13114.55     0.27     806.98    -0.16
 14   4.2300  16541.56    -0.06     997.40    -0.11
 15   4.2302  16541.54     0.17     996.55    -0.74
 16   4.2327  16540.06    -0.12     995.51     0.02
 17   6.7210  39092.80     0.17    1613.70    -0.11
 18   6.7210  39092.55    -0.37    1613.50    -0.33
 19   6.7210  39093.01    -0.24    1613.56    -0.30
 20   6.7211  39095.34    -0.14    1613.76    -0.27
 21  11.0967  55554.97    -0.00    3034.16     0.10
 22  11.0993  55484.63     0.10    3032.81     0.17
 23  11.0997  55473.42     0.05    3032.65     0.31
 24  13.1854  64750.31    -0.11    3547.20     0.09
 25  13.1856  64747.21     0.19    3547.13     0.27
 26  13.1858  64743.30    -0.08    3546.52    -0.07

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.

02CU154    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.772    43.782    43.762
ecceobj         0.059     0.059     0.059
incobj          3.351     3.351     3.351
qmin           40.119    40.192    40.118
qmax           47.738    47.716    47.742
amean          43.825    43.835    43.816
amin           43.476    43.491    43.475
amax           44.186    44.201    44.190
emean           0.063     0.063     0.063
emin            0.046     0.046     0.045
emax            0.081     0.080     0.081
imean           1.904     1.907     1.899
imin            1.138     1.146     1.126
imax            2.594     2.586     2.600
excite_mean     0.072     0.072     0.072
fracstop        1.000     1.000     1.000
cjmean          3.093     3.093     3.093

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       182.3     182.4     182.9
kozaiamp        180.0     179.9     180.0