Orbit Fit and Astrometric record for 99CX131

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: 99CX131   
# Created Fri Nov 16 02:07:28 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   27 observations of   27
# Arc:  14.09y
# First observation: 1999/02/11
#  Last observation: 2013/03/14
# Chi-squared of fit:    93.33 DOF:   48 RMS:  0.33
# Min/Max residuals:    -1.23    1.03
# Exact a, adot, b, bdot, g, gdot:
  1.458646E-05  2.147872E-02  3.115924E-06  3.697492E-03  2.370476E-02 -5.348351E-03
# Covariance matrix:
  1.3050E-13 -3.3759E-14  5.6178E-15 -4.4161E-15  3.8072E-14 -8.0866E-14
 -3.3759E-14  2.1598E-14 -4.2980E-15  3.4344E-15  1.4094E-15  6.2307E-14
  5.6178E-15 -4.2980E-15  9.6079E-14 -1.0771E-14  1.6489E-15 -1.4140E-14
 -4.4161E-15  3.4344E-15 -1.0771E-14  3.0320E-15 -8.2993E-16  1.1254E-14
  3.8072E-14  1.4094E-15  1.6489E-15 -8.2993E-16  2.6623E-13 -2.0063E-14
 -8.0866E-14  6.2307E-14 -1.4140E-14  1.1254E-14 -2.0063E-14  2.0463E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.291069  129.349677   -0.224728    0.004697   -0.967718  2451220.806763
# Heliocentric elements and errors
Epoch:              2451220.5000  =  1999/02/11
Mean Anomaly:          277.03941 +/-     0.026
Argument of Peri:      111.04934 +/-     0.015
Long of Asc Node:      127.98696 +/-     0.000
Inclination:             9.77301 +/-     0.000
Eccentricity:         0.23221915 +/-    0.0000
Semi-Major Axis:     42.09514484 +/-    0.0035
Time of Perihelion: 2474209.2707 +/-      11.9
Perihelion:          32.31984607 +/-    0.0028
Aphelion:            51.87044360 +/-    0.0044
Period (y)              273.1217 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -27.52706909 +/-    0.0006
Ecliptic Y           33.22685844 +/-    0.0007
Ecliptic Z            0.21443514 +/-    0.0000
Ecliptic XDOT        -0.00152699 +/-    0.0000
Ecliptic YDOT        -0.00204326 +/-    0.0000
Ecliptic ZDOT         0.00042391 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.14883723 +/-    0.0007
Geocenter to KBO     42.18580145 +/-    0.0009
# Hcoef:  7.31

The following table shows the complete astrometric record for 99CX131. 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 (99CX131) followed by the observatory code and reference code for the source of the astrometry.

1999 02  11.30602  08 47 28.29   +18 11 42.5   22.7R 99CX131   568  Ca4191      
1999 02  11.38707  08 47 27.89   +18 11 44.1   22.7R 99CX131   568  Ca4191      
1999 02  17.43889  08 46 59.44   +18 13 48.1   22.7R 99CX131   568  Ca4191      
1999 02  18.39633  08 46 55.05   +18 14 07.2   22.7R 99CX131   568  Ca4191      
1999 03  19.25198  08 45 03.95   +18 22 13.9         99CX131   696  Ca4191      
1999 03  19.30211  08 45 03.85   +18 22 14.5         99CX131   696  Ca4191      
1999 03  19.34969  08 45 03.81   +18 22 14.5         99CX131   696  Ca4191      
1999 04  11.33934  08 44 18.72   +18 25 49.6   23.4R 99CX131   568  Ca4843      
1999 04  12.37049  08 44 17.78   +18 25 54.7   23.4R 99CX131   568  Ca4843      
1999 05  06.27330  08 44 24.37   +18 26 08.6   23.1R 99CX131   568  Cc9919      
1999 05  06.32238  08 44 24.43   +18 26 08.5   23.1R 99CX131   568  Cc9919      
1999 12  30.63648  08 56 03.84   +17 48 48.6         99CX131   568  Ca8502      
1999 12  31.61208  08 55 59.92   +17 49 07.3         99CX131   568  Ca8502      
1999 12  31.63278  08 55 59.83   +17 49 07.6         99CX131   568  Ca8502      
2002 02  03.49523  09 04 00.95   +17 43 55.5   23.2R 99CX131   568  Cf1463      
2002 02  04.46888  09 03 56.12   +17 44 18.1         99CX131   568  Cf1463      
2002 02  04.53420  09 03 55.81   +17 44 19.6         99CX131   568  Cf1463      
2005 02  10.30899  09 19 50.50   +17 15 45.1   23.9g 99CX131   568  C~0Wz5      
2005 02  10.39196  09 19 50.09   +17 15 47.0   24.0g 99CX131   568  C~0Wz5      
2005 02  10.43152  09 19 49.90   +17 15 47.7   23.6g 99CX131   568  C~0Wz5      
2005 02  15.33214  09 19 25.83   +17 17 48.0   23.3g 99CX131   568  C~0Wz5      
2005 04  11.30482  09 16 08.68   +17 33 28.6   23.4i 99CX131   568  C~0Wz5      
2005 04  11.33442  09 16 08.63   +17 33 28.8   23.5i 99CX131   568  C~0Wz5      
2005 04  11.35929  09 16 08.59   +17 33 28.9   23.3i 99CX131   568  C~0Wz5      
2013 03  13.24431  10 03 12.76   +15 36 50.1   22.5R 99CX131   695  C~0uco      
2013 03  14.20106  10 03 08.49   +15 37 12.8         99CX131   695  C~0uco      
2013 03  14.35133  10 03 07.81   +15 37 16.3         99CX131   695  C~0uco      

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    -0.09       0.00    -0.11
  2   0.0002      0.00    -0.18       0.00    -0.21
  3   0.0168      0.00    -0.18       0.00    -0.03
  4   0.0194      0.00    -0.12       0.00    -0.07
  5   0.0984      0.00    -1.23       0.00    -0.20
  6   0.0986      0.00    -0.49       0.00    -0.24
  7   0.0987      0.00     1.03       0.00    -0.85
  8   0.1616      0.00     0.43       0.00     0.32
  9   0.1644      0.00     0.25       0.00     0.13
 10   0.2299      0.00     0.09       0.00     0.09
 11   0.2300      0.00     0.00       0.00     0.19
 12   0.8825      0.00     0.31       0.00    -0.03
 13   0.8852      0.00    -0.05       0.00     0.14
 14   0.8852      0.00    -0.12       0.00     0.05
 15   2.9793      0.00     0.53       0.00    -0.09
 16   2.9820      0.00     0.03       0.00    -0.12
 17   2.9821      0.00     0.29       0.00    -0.12
 18   5.9986      0.00    -0.24       0.00     0.42
 19   5.9989      0.00    -0.15       0.00     0.25
 20   5.9990      0.00    -0.01       0.00    -0.03
 21   6.0124      0.00    -0.25       0.00     0.25
 22   6.1629      0.00     0.06       0.00     0.35
 23   6.1630      0.00     0.06       0.00     0.34
 24   6.1630      0.00     0.09       0.00     0.26
 25  14.0833      0.00    -0.02       0.00    -0.09
 26  14.0860      0.00    -0.02       0.00    -0.28
 27  14.0864      0.00    -0.03       0.00    -0.34

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.

99CX131    quality flag:3

Type:          5:3EE     5:3EE     5:3EE

axisobj        42.202    42.202    42.202
ecceobj         0.231     0.231     0.231
incobj          9.760     9.760     9.760
qmin           31.614    31.614    31.613
qmax           53.586    53.587    53.586
amean          42.327    42.327    42.327
amin           41.888    41.888    41.888
amax           42.844    42.844    42.843
emean           0.228     0.228     0.228
emin            0.205     0.204     0.204
emax            0.251     0.251     0.251
imean           9.126     9.124     9.128
imin            7.976     7.976     7.976
imax            9.809     9.811     9.807
excite_mean     0.278     0.278     0.278
fracstop        1.000     1.000     1.000
cjmean          2.991     2.991     2.991

libcent 0       180.0     179.3     179.5
libamp  0        72.1      72.5      70.6
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       158.8     159.4     158.1
kozaiamp        179.9     179.9     180.0