Orbit Fit and Astrometric record for 02CE251

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: 02CE251   
# Created Sun Dec 17 02:37:11 2017
# Orbit generated from Bernstein formalism
# Fitting   23 observations of   23
# Arc:  13.12y
# First observation: 2002/02/08
#  Last observation: 2015/03/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.006055   0.050293   0.000851  -0.008260   0.032914   0.000000
# Chi-squared of fit:    74.95 DOF:   40 RMS:  0.32
# Min/Max residuals:    -1.06    0.73
# Exact a, adot, b, bdot, g, gdot:
  1.977502E-05  4.310301E-02 -2.346765E-06 -7.042765E-03  3.440301E-02 -4.918753E-03
# Covariance matrix:
  6.3677E-13 -7.7456E-14 -7.5045E-15  1.1343E-14  6.9884E-13 -1.0558E-13
 -7.7456E-14  7.3445E-14  8.2712E-15 -1.2239E-14 -2.3938E-14  1.1663E-13
 -7.5045E-15  8.2712E-15  1.3644E-13 -1.3110E-14 -2.6495E-15  1.3435E-14
  1.1343E-14 -1.2239E-14 -1.3110E-14  3.7314E-15  4.2869E-15 -1.9880E-14
  6.9884E-13 -2.3938E-14 -2.6495E-15  4.2869E-15  1.0469E-12 -3.7003E-14
 -1.0558E-13  1.1663E-13  1.3435E-14 -1.9880E-14 -3.7003E-14  1.8944E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.004710  163.270373    0.393887   -0.000010   -0.901560  2452313.855633
# Heliocentric elements and errors
Epoch:              2452310.5000  =  2002/02/05
Mean Anomaly:          340.48752 +/-     0.008
Argument of Peri:      214.19616 +/-     0.011
Long of Asc Node:      342.53488 +/-     0.000
Inclination:             9.28235 +/-     0.000
Eccentricity:         0.26845895 +/-    0.0001
Semi-Major Axis:     39.46944836 +/-    0.0069
Time of Perihelion: 2457219.5775 +/-       1.6
Perihelion:          28.87352157 +/-    0.0064
Aphelion:            50.06537515 +/-    0.0096
Period (y)              247.9704 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -28.58588972 +/-    0.0008
Ecliptic Y            9.00892433 +/-    0.0003
Ecliptic Z            0.00233219 +/-    0.0000
Ecliptic XDOT        -0.00062107 +/-    0.0000
Ecliptic YDOT        -0.00339839 +/-    0.0000
Ecliptic ZDOT        -0.00056029 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   29.97188372 +/-    0.0008
Geocenter to KBO     29.06722344 +/-    0.0009
# Hcoef:  8.38

The following table shows the complete astrometric record for 02CE251. 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 (02CE251) followed by the observatory code and reference code for the source of the astrometry.

2002 02  08.35489  10 58 20.23   +06 34 45.4   22.7R 02CE251   695  Cf5629      
2002 02  08.47609  10 58 19.56   +06 34 49.4         02CE251   695  Cf5629      
2002 03  18.20894  10 54 30.17   +06 55 41.6   23.0R 02CE251   695  Cf5629      
2002 03  18.26785  10 54 29.81   +06 55 43.8         02CE251   695  Cf5629      
2002 04  06.18515  10 52 45.66   +07 05 02.1         02CE251   696  Cf5629      
2002 04  06.24634  10 52 45.35   +07 05 03.8         02CE251   696  Cf5629      
2002 04  06.27479  10 52 45.19   +07 05 04.2         02CE251   696  Cf5629      
2003 03  30.22932  11 01 58.66   +05 42 12.6   22.8R 02CE251   695  Ch8257      
2003 03  30.32694  11 01 58.10   +05 42 15.5         02CE251   695  Ch8257      
2003 03  31.27632  11 01 52.86   +05 42 44.1         02CE251   695  Ch8257      
2004 03  20.31502  11 11 31.87   +04 16 11.3   22.6R 02CE251   662  Ck2152      
2004 03  20.42410  11 11 31.14   +04 16 14.2         02CE251   662  Ck2152      
2013 03  12.29561  12 33 11.76   -08 29 06.0   22.5R 02CE251   G37  C~0qSR      
2013 03  12.29658  12 33 11.74   -08 29 05.6   22.5R 02CE251   695  C~0ucs      
2013 03  12.34973  12 33 11.41   -08 29 04.1         02CE251   695  C~0ucs      
2013 03  12.43009  12 33 10.93   -08 29 01.7         02CE251   G37  C~0qSR      
2013 03  13.31812  12 33 05.59   -08 28 34.8         02CE251   695  C~0ucs      
2014 03  26.13732  12 41 09.66   -09 45 58.8   23.4V 02CE251   W84  C~2J8n      
2014 03  26.20528  12 41 09.22   -09 45 56.5         02CE251   W84  C~2J8n      
2014 03  26.27392  12 41 08.77   -09 45 54.2         02CE251   W84  C~2J8n      
2015 03  23.31993  12 50 57.12   -11 11 11.0   22.5R 02CE251   695  C~1Q3B      
2015 03  23.38391  12 50 56.72   -11 11 08.9         02CE251   695  C~1Q3B      
2015 03  23.44674  12 50 56.32   -11 11 07.0         02CE251   695  C~1Q3B      

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     0.01       0.00    -0.18
  2   0.0003    -10.75     0.13      -0.13     0.24
  3   0.1036  -3647.21    -0.30    -150.41     0.28
  4   0.1038  -3653.01    -0.43    -150.42     0.54
  5   0.1556  -5300.12     0.73    -225.43     0.09
  6   0.1558  -5305.04     0.64    -225.61     0.18
  7   0.1558  -5307.39     0.53    -226.15    -0.22
  8   1.1359   4219.70    -0.31   -1659.20     0.16
  9   1.1361   4210.87    -0.40   -1659.74     0.04
 10   1.1387   4127.64    -0.53   -1663.45    -0.28
 11   2.1108  14137.39     0.10   -3109.66     0.06
 12   2.1111  14126.15    -0.41   -3111.23    -1.06
 13  11.0881 108281.03     0.45  -18381.80    -0.04
 14  11.0881 108280.48     0.02  -18381.49     0.26
 15  11.0883 108273.96    -0.02  -18381.88     0.11
 16  11.0885 108264.38     0.19  -18382.22     0.14
 17  11.0909 108157.68     0.25  -18385.78    -0.20
 18  12.1253 119170.36    -0.12  -20484.87    -0.12
 19  12.1255 119161.14    -0.14  -20484.99    -0.14
 20  12.1257 119151.75    -0.23  -20485.17    -0.24
 21  13.1169 132923.49    -0.13  -22676.72     0.09
 22  13.1171 132914.63    -0.03  -22676.71     0.20
 23  13.1173 132905.87     0.01  -22676.92     0.08

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.

02CE251    quality flag:3

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

axisobj        39.161    39.181    39.141
ecceobj         0.263     0.264     0.263
incobj          9.307     9.307     9.307
qmin           28.115    28.099    28.117
qmax           51.593    51.618    51.514
amean          39.455    39.456    39.455
amin           38.906    38.917    38.926
amax           40.099    40.113    40.097
emean           0.271     0.272     0.269
emin            0.256     0.256     0.254
emax            0.288     0.287     0.286
imean          10.023    10.102    10.193
imin            9.370     9.330     9.530
imax           10.461    10.722    10.686
excite_mean     0.322     0.323     0.322
fracstop        1.000     1.000     1.000
cjmean          2.933     2.932     2.932

libcent 0       180.3     179.5     180.1
libamp  0       122.0     124.2     123.0
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       188.7     181.7     182.5
kozaiamp        180.0     180.0     180.0