Orbit Fit and Astrometric record for 02CW224

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: 02CW224   
# Created Mon May 21 01:37:21 2018
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   17
# Arc:  16.16y
# First observation: 2001/10/21
#  Last observation: 2017/12/20
Preliminary a, adot, b, bdot, g, gdot:
  -0.008753   0.030013  -0.000490   0.001811   0.020927   0.000000
# Chi-squared of fit:    34.25 DOF:   28 RMS:  0.25
# Min/Max residuals:    -0.78    0.52
# Exact a, adot, b, bdot, g, gdot:
  1.769276E-05  2.574263E-02  5.850693E-09  1.516877E-03  2.622624E-02 -6.128071E-03
# Covariance matrix:
  3.1409E-13 -6.4866E-14  8.1026E-15 -3.9297E-15  2.0826E-13 -1.2773E-13
 -6.4866E-14  3.0636E-14 -2.9500E-15  1.8497E-15 -2.4947E-14  6.3155E-14
  8.1026E-15 -2.9500E-15  1.3794E-13 -1.2227E-14  7.9714E-15 -6.9202E-15
 -3.9297E-15  1.8497E-15 -1.2227E-14  2.5844E-15 -2.5978E-15  4.2012E-15
  2.0826E-13 -2.4947E-14  7.9714E-15 -2.5978E-15  3.5889E-13 -7.5265E-14
 -1.2773E-13  6.3155E-14 -6.9202E-15  4.2012E-15 -7.5265E-14  1.4267E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    4.632814   55.375411    0.459950    0.070789   -0.874904  2452203.803673
# Heliocentric elements and errors
Epoch:              2452200.5000  =  2001/10/18
Mean Anomaly:          287.57606 +/-     0.012
Argument of Peri:      153.63905 +/-     0.016
Long of Asc Node:        1.77126 +/-     0.001
Inclination:             5.66784 +/-     0.000
Eccentricity:         0.24405577 +/-    0.0000
Semi-Major Axis:     39.62614512 +/-    0.0037
Time of Perihelion: 2470530.0081 +/-       1.5
Perihelion:          29.95515567 +/-    0.0029
Aphelion:            49.29713456 +/-    0.0046
Period (y)              249.4485 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           22.47325348 +/-    0.0005
Ecliptic Y           31.74109947 +/-    0.0007
Ecliptic Z            3.07974285 +/-    0.0001
Ecliptic XDOT        -0.00258966 +/-    0.0000
Ecliptic YDOT         0.00099227 +/-    0.0000
Ecliptic ZDOT         0.00010638 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.01319435 +/-    0.0006
Geocenter to KBO     38.12974675 +/-    0.0009
# Hcoef:  6.95

The following table shows the complete astrometric record for 02CW224. 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 (02CW224) followed by the observatory code and reference code for the source of the astrometry.

2001 10  21.30293  03 27 18.53   +23 36 03.2   22.3R 02CW224   695  Cf0409      
2001 10  21.36489  03 27 18.25   +23 36 02.4         02CW224   695  Cf0409      
2002 02  06.13582  03 20 15.56   +23 06 47.7   22.6R 02CW224   695  Cf0409      
2002 02  07.11129  03 20 15.90   +23 06 42.0         02CW224   695  Cf0409      
2002 02  08.11518  03 20 16.38   +23 06 37.5         02CW224   695  Cf0409      
2002 11  07.33186  03 32 02.87   +23 58 42.4   22.2R 02CW224   695  Cg7926      
2002 11  07.42759  03 32 02.34   +23 58 40.8         02CW224   695  Cg7926      
2002 11  28.23439  03 30 04.69   +23 52 18.7   22.5R 02CW224   695  Cg7926      
2002 11  28.29745  03 30 04.30   +23 52 17.1   22.5R 02CW224   695  Cg7926      
2003 10  01.48920  03 41 16.71   +24 31 13.3   22.2R 02CW224   568  Ci6909      
2003 10  02.57492  03 41 12.98   +24 31 08.7         02CW224   568  Ci6909      
2008 11  18.13985  04 10 50.72   +26 22 45.8   22.9R 02CW224   250  S~06AS      
2008 11  18.14610  04 10 50.68   +26 22 45.7         02CW224   250  S~06AS      
2008 11  18.15305  04 10 50.64   +26 22 45.7         02CW224   250  S~06AS      
2008 11  18.19402  04 10 50.40   +26 22 45.1         02CW224   250  S~06AT      
2017 12  20.42552  05 16 51.529  +28 48 31.61  22.1R 02CW224   G37  C~2Uv0      
2017 12  20.48677  05 16 51.115  +28 48 31.02        02CW224   G37  C~2Uv0      

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    -0.45       0.00     0.19
  2   0.0002     -3.93    -0.02       0.17     0.07
  3   0.2952  -6080.87     0.22    -227.50     0.15
  4   0.2979  -6077.81    -0.17    -234.23    -0.26
  5   0.3006  -6072.57    -0.05    -240.29     0.19
  6   1.0459   4116.39    -0.24     371.79     0.26
  7   1.0462   4108.95    -0.07     371.97     0.21
  8   1.1032   2450.85     0.52     388.59     0.30
  9   1.1033   2445.28    -0.01     388.33     0.06
 10   1.9444  11949.40     0.46     524.21    -0.55
 11   1.9474  11898.58     0.02     531.06    -0.78
 12   7.0769  37201.60    -0.06    2411.98     0.01
 13   7.0769  37201.04    -0.10    2411.97    -0.00
 14   7.0769  37200.49    -0.06    2412.06     0.08
 15   7.0770  37197.10     0.01    2412.01    -0.00
 16  16.1646  96248.79     0.08    6069.23     0.07
 17  16.1648  96242.14    -0.05    6068.75    -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.

02CW224    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.611    39.622    39.600
ecceobj         0.241     0.241     0.241
incobj          5.658     5.658     5.658
qmin           29.004    29.064    28.458
qmax           50.162    50.120    50.935
amean          39.455    39.455    39.455
amin           39.057    39.065    39.036
amax           39.923    39.915    39.954
emean           0.235     0.233     0.246
emin            0.202     0.204     0.205
emax            0.262     0.261     0.276
imean           7.250     7.573     5.745
imin            5.321     5.306     3.236
imax            9.117     9.592     9.011
excite_mean     0.268     0.269     0.268
fracstop        1.000     1.000     1.000
cjmean          2.970     2.969     2.969

libcent 0       179.2     179.8     180.6
libamp  0        53.0      48.1      59.7
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       157.9     171.3      87.4
kozaiamp        180.0     180.0      69.1