Orbit Fit and Astrometric record for 99CW131

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: 99CW131   
# Created Tue Oct 24 01:37:00 2017
# Orbit generated from Bernstein formalism
# Fitting    8 observations of    8
# Arc:   1.16y
# First observation: 1999/02/10
#  Last observation: 2000/04/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000000   0.021836   0.000000   0.003043   0.023320   0.000000
# Chi-squared of fit:     5.12 DOF:   10 RMS:  0.14
# Min/Max residuals:    -0.23    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.464839E-05  2.178511E-02  2.653274E-06  3.028639E-03  2.327686E-02 -1.885149E-03
# Covariance matrix:
  7.5055E-13  6.4076E-12 -1.0816E-14  1.0944E-12  7.4120E-12  3.0960E-10
  6.4076E-12  3.2869E-10 -1.9291E-12  1.8895E-10  1.8751E-10  5.3378E-08
 -1.0816E-14 -1.9291E-12  3.8825E-13 -1.7728E-12 -6.7318E-13 -4.0848E-10
  1.0944E-12  1.8895E-10 -1.7728E-12  1.4180E-10  6.6459E-11  3.9894E-08
  7.4120E-12  1.8751E-10 -6.7318E-13  6.6459E-11  1.6031E-10  1.8781E-08
  3.0960E-10  5.3378E-08 -4.0848E-10  3.9894E-08  1.8781E-08  1.1268E-05
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.074250  174.819607    0.544421   -0.001304   -0.830774  2451219.968313
# Heliocentric elements and errors
Epoch:              2451210.5000  =  1999/02/01
Mean Anomaly:          270.09304 +/-    17.522
Argument of Peri:      100.44617 +/-    14.192
Long of Asc Node:      174.62748 +/-     0.001
Inclination:             7.95037 +/-     0.010
Eccentricity:         0.09742652 +/-    0.1484
Semi-Major Axis:     43.38693374 +/-    1.0762
Time of Perihelion: 2477279.6992 +/-    4987.1
Perihelion:          39.15989586 +/-    6.5106
Aphelion:            47.61397161 +/-    6.5451
Period (y)              285.7897 +/-     10.63
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -43.55560103 +/-    0.0233
Ecliptic Y            4.49568528 +/-    0.0021
Ecliptic Z           -0.05555424 +/-    0.0000
Ecliptic XDOT        -0.00001268 +/-    0.0004
Ecliptic YDOT        -0.00256289 +/-    0.0000
Ecliptic ZDOT         0.00035652 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.78703750 +/-    0.0231
Geocenter to KBO     42.96112574 +/-    0.0234
# Hcoef:  7.87

The following table shows the complete astrometric record for 99CW131. 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 (99CW131) followed by the observatory code and reference code for the source of the astrometry.

1999 02  10.46757  11 40 51.74   +01 59 24.4   24.2R 99CW131   568  Ca4191      
1999 02  10.55479  11 40 51.43   +01 59 26.6   24.2R 99CW131   568  Ca4191      
1999 02  18.62279  11 40 22.04   +02 02 51.4   24.2R 99CW131   568  Ca4191      
1999 02  18.63440  11 40 21.97   +02 02 52.0   24.2R 99CW131   568  Ca4191      
2000 04  06.47348  11 41 56.06   +02 05 35.4   23.7R 99CW131   568  Cb1943      
2000 04  06.51192  11 41 55.91   +02 05 36.5   23.8R 99CW131   568  Cb1943      
2000 04  07.50035  11 41 52.04   +02 06 03.4   23.6R 99CW131   568  Cb1943      
2000 04  07.53257  11 41 51.90   +02 06 04.7   23.6R 99CW131   568  Cb1943      

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     0.03       0.00    -0.12
  2   0.0002     -5.14    -0.04       0.18    -0.05
  3   0.0223   -490.80     0.23      13.58     0.03
  4   0.0224   -492.01    -0.23      13.71     0.15
  5   1.1527    738.09    -0.00     722.87    -0.16
  6   1.1528    735.59     0.03     722.99    -0.09
  7   1.1555    671.66     0.16     724.68    -0.04
  8   1.1556    669.22    -0.18     725.04     0.28

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.

99CW131    quality flag:1

Type:       SCATNEAR  CENTAURR CLASSICAL

axisobj        43.440    60.238    43.019
ecceobj         0.096     0.543     0.029
incobj          7.946     7.917     7.942
qmin           38.175    27.157    41.373
qmax           49.592   101.089    45.323
amean          43.696    62.601    43.266
amin           43.302    60.238    42.934
amax           44.180    64.554    43.606
emean           0.085     0.553     0.027
emin            0.051     0.536     0.011
emax            0.125     0.566     0.040
imean           8.260     8.335     8.034
imin            7.414     7.097     7.395
imax            9.274     9.283     8.724
excite_mean     0.167     0.572     0.142
fracstop        1.000     0.235     1.000
cjmean          3.064     2.858     3.069

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       179.5     200.4     178.9
kozaiamp        179.9     107.6     180.0