Orbit Fit and Astrometric record for 02CB249

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: 02CB249   
# Created Sun Dec  5 02:09:14 2021
# Orbit generated from Bernstein formalism
# Fitting     15 observations of     15
# Arc:  68.66d
# First observation: 2002/02/07
#  Last observation: 2002/04/17
Preliminary a, adot, b, bdot, g, gdot:
  -0.000030   0.211087  -0.000086  -0.036612   0.086278   0.000000
# Chi-squared of fit:    43.16 DOF:     24 RMS:  0.30
# Min/Max residuals:    -0.84    0.54
# Exact a, adot, b, bdot, g, gdot:
  3.181866E-05  1.325568E-01 -4.078032E-06 -3.763089E-02  7.312689E-02 -4.499335E-02
# Covariance matrix:
  5.1448E-13  1.1672E-11  1.4619E-15 -3.9869E-13  3.1034E-12  6.7157E-11
  1.1672E-11  1.0780E-07 -1.2601E-10  2.7674E-09  1.6276E-08 -2.2575E-07
  1.4619E-15 -1.2601E-10  5.1320E-13 -5.5697E-12 -1.8910E-11  2.7540E-10
 -3.9869E-13  2.7674E-09 -5.5697E-12  9.3806E-11  4.1281E-10 -6.2849E-09
  3.1034E-12  1.6276E-08 -1.8910E-11  4.1281E-10  2.4646E-09 -3.3442E-08
  6.7157E-11 -2.2575E-07  2.7540E-10 -6.2849E-09 -3.3442E-08  5.3509E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.040008  163.729885    0.414399    0.047211   -0.890806  2452313.010133
# Heliocentric elements and errors
Epoch:              2452310.5000  =  2002/02/05
Mean Anomaly:          343.56503 +/-     0.327
Argument of Peri:      227.47223 +/-     0.161
Long of Asc Node:      351.94158 +/-     0.023
Inclination:            16.21757 +/-     0.038
Eccentricity:         0.54046567 +/-    0.0075
Semi-Major Axis:     26.52415220 +/-    0.3469
Time of Perihelion: 2454588.3602 +/-       7.6
Perihelion:          12.18875862 +/-    0.2549
Aphelion:            40.85954577 +/-    0.5702
Period (y)              136.6062 +/-      2.68
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -13.84786453 +/-    0.0089
Ecliptic Y            4.47872316 +/-    0.0026
Ecliptic Z            0.72519019 +/-    0.0005
Ecliptic XDOT         0.00014414 +/-    0.0000
Ecliptic YDOT        -0.00521518 +/-    0.0000
Ecliptic ZDOT        -0.00149603 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   14.57217259 +/-    0.0085
Geocenter to KBO     13.67485944 +/-    0.0093
# Hcoef:  9.90

The following table shows the complete astrometric record for 02CB249. 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 (02CB249) followed by the observatory code and reference code for the source of the astrometry.

2002 02  07.50939  11 04 46.17   +09 12 13.1   20.9R 02CB249   695  Cf2784      
2002 02  08.38018  11 04 37.11   +09 12 56.6         02CB249   695  Cf2784      
2002 02  08.51254  11 04 35.67   +09 13 03.0         02CB249   695  Cf2784      
2002 03  13.26795  10 58 05.54   +09 41 37.4   21.3R 02CB249   688  Cf2784      
2002 03  13.31808  10 58 04.91   +09 41 39.7         02CB249   688  Cf2784      
2002 03  13.36517  10 58 04.32   +09 41 42.1         02CB249   688  Cf2784      
2002 03  14.29655  10 57 53.01   +09 42 28.3   20.3R 02CB249   688  Cf2784      
2002 03  14.31824  10 57 52.73   +09 42 29.6         02CB249   688  Cf2784      
2002 04  17.136921 10 52 06.30   +10 01 18.3   21.4R 02CB249   809  C~4q2z      
2002 04  17.142497 10 52 06.27   +10 01 18.4   21.2I 02CB249   809  C~4q2z      
2002 04  17.148157 10 52 06.23   +10 01 18.5   21.6V 02CB249   809  C~4q2z      
2002 04  17.151997 10 52 06.18   +10 01 18.6   21.5R 02CB249   809  C~4q2z      
2002 04  17.157818 10 52 06.13   +10 01 18.6   21.0I 02CB249   809  C~4q2z      
2002 04  17.163479 10 52 06.09   +10 01 18.7   21.7V 02CB249   809  C~4q2z      
2002 04  17.167318 10 52 06.06   +10 01 18.8   21.5R 02CB249   809  C~4q2z      

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    -0.65       0.00    -0.84
     2   0.0024   -140.53     0.36     -11.77     0.54
     3   0.0027   -162.67     0.30     -14.11     0.42
     4   0.0924  -6152.31     0.25    -651.73    -0.15
     5   0.0926  -6161.80     0.21    -653.17    -0.35
     6   0.0927  -6170.79     0.09    -654.29    -0.31
     7   0.0952  -6343.13    -0.15    -675.55     0.22
     8   0.0953  -6347.46    -0.41    -675.94     0.38
     9   0.1879 -11521.79     0.01   -1580.53    -0.04
    10   0.1879 -11522.24     0.18   -1580.61     0.06
    11   0.1879 -11522.83     0.22   -1580.74     0.10
    12   0.1879 -11523.55    -0.08   -1580.93     0.03
    13   0.1879 -11524.24    -0.12   -1581.21    -0.07
    14   0.1880 -11524.83    -0.08   -1581.34    -0.03
    15   0.1880 -11525.27    -0.11   -1581.41     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.

02CB249    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        26.324    27.409    25.349
ecceobj         0.538     0.560     0.515
incobj         16.244    16.131    16.357
qmin           11.966    11.901    11.846
qmax           42.864    43.683    41.037
amean          26.786    27.490    25.715
amin           25.869    27.295    24.857
amax           27.569    27.855    26.728
emean           0.544     0.562     0.524
emin            0.530     0.556     0.502
emax            0.556     0.568     0.540
imean          16.804    16.651    16.586
imin           16.572    16.419    15.525
imax           17.255    16.873    17.498
excite_mean     0.616     0.631     0.597
fracstop        0.004     0.003     0.013
cjmean          2.635     2.605     2.678

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       249.0     245.1     275.6
kozaiamp         20.7      17.3      46.4