Orbit Fit and Astrometric record for 02CA249

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: 02CA249   
# Created Wed Sep 26 00:57:26 2018
# Orbit generated from Bernstein formalism
# Fitting    4 observations of    4
# Arc:  36.97d
# First observation: 2002/02/06
#  Last observation: 2002/03/15
Preliminary a, adot, b, bdot, g, gdot:
   0.000000   0.249436   0.000001  -0.019486   0.096763   0.000000
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# Chi-squared of fit:     3.64 DOF:    3 RMS:  0.17
# Min/Max residuals:    -0.26    0.36
# Exact a, adot, b, bdot, g, gdot:
  3.154554E-05  1.657471E-01 -2.448901E-06 -1.971443E-02  8.361484E-02  2.270980E-02
# Covariance matrix:
  5.7557E-11  2.9542E-07 -5.7974E-13  7.9854E-10  4.6423E-08 -7.7682E-07
  2.9542E-07  1.5376E-03 -3.0865E-09  4.2439E-06  2.4137E-04 -4.0878E-03
 -5.7974E-13 -3.0865E-09  5.0462E-13 -1.4316E-11 -4.8237E-10  8.5861E-09
  7.9854E-10  4.2439E-06 -1.4316E-11  1.2862E-08  6.6347E-07 -1.1765E-05
  4.6423E-08  2.4137E-04 -4.8237E-10  6.6347E-07  3.7897E-05 -6.4030E-04
 -7.7682E-07 -4.0878E-03  8.5861E-09 -1.1765E-05 -6.4030E-04  1.1113E-02
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.289353  135.857301   -0.027835   -0.005039   -0.982885  2452311.700603
# Heliocentric elements and errors
Epoch:              2452310.5000  =  2002/02/05
Mean Anomaly:           13.73620 +/-    60.028
Argument of Peri:      151.83811 +/-   140.374
Long of Asc Node:      313.71127 +/-     0.531
Inclination:             6.78203 +/-     1.644
Eccentricity:         0.35856201 +/-    0.1387
Semi-Major Axis:     19.44839684 +/-    1.7958
Time of Perihelion: 2451115.1692 +/-    5221.1
Perihelion:          12.47494065 +/-    2.9325
Aphelion:            26.42185303 +/-    3.6366
Period (y)               85.7697 +/-     11.88
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -9.30594233 +/-    0.6318
Ecliptic Y            8.99899502 +/-    0.6133
Ecliptic Z           -0.06042554 +/-    0.0044
Ecliptic XDOT        -0.00431950 +/-    0.0019
Ecliptic YDOT        -0.00337965 +/-    0.0031
Ecliptic ZDOT        -0.00064905 +/-    0.0001
# Distances at JD0 (AU)
Heliocenter to KBO   12.94550599 +/-    0.6229
Geocenter to KBO     11.95959888 +/-    0.8805
# Hcoef: 11.91

The following table shows the complete astrometric record for 02CA249. 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 (02CA249) followed by the observatory code and reference code for the source of the astrometry.

2002 02  06.19986  09 12 54.69   +15 48 24.4   22.0R 02CA249   695  Cf2784      
2002 02  06.28876  09 12 53.44   +15 48 29.1         02CA249   695  Cf2784      
2002 02  07.22347  09 12 40.44   +15 49 17.0         02CA249   695  Cf2784      
2002 03  15.17236  09 05 23.31   +16 14 50.6   23.3R 02CA249   662  Cf2784      

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    -0.04       0.00    -0.26
  2   0.0002    -18.62     0.06      -0.86    -0.09
  3   0.0028   -212.01    -0.04     -10.75     0.36
  4   0.1012  -6689.26    -0.00    -385.75    -0.01

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.

02CA249    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        19.367    19.367    19.367
ecceobj         0.356     0.356     0.356
incobj          6.791     6.791     6.791
qmin           12.052    12.217    11.700
qmax           26.378    26.378    26.482
amean          18.832    19.170    19.218
amin           18.083    18.751    18.892
amax           19.503    19.547    19.503
emean           0.337     0.288     0.358
emin            0.297     0.240     0.347
emax            0.359     0.358     0.387
imean           7.174     7.498     7.698
imin            6.382     5.707     6.981
imax            8.290     9.009     8.290
excite_mean     0.360     0.317     0.382
fracstop        0.016     0.018     0.002
cjmean          3.077     3.085     3.045

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       191.7     179.4     191.9
kozaiamp        179.4     178.3      45.5