Orbit Fit and Astrometric record for 13CD223

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: 13CD223   
# Created Thu Dec 14 02:37:52 2017
# Orbit generated from Bernstein formalism
# Fitting   18 observations of   18
# Arc:   3.03y
# First observation: 2011/01/30
#  Last observation: 2014/02/10
Preliminary a, adot, b, bdot, g, gdot:
  -0.000110   0.016904  -0.000005   0.000450   0.020566   0.000000
# Chi-squared of fit:     8.85 DOF:   30 RMS:  0.12
# Min/Max residuals:    -0.28    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.277245E-05  1.692148E-02 -1.567163E-07  4.465291E-04  2.119397E-02  7.634306E-04
# Covariance matrix:
  2.9870E-13 -3.5442E-13  4.5246E-15 -8.1850E-15 -8.9507E-15 -5.6858E-12
 -3.5442E-13  8.0466E-13 -8.0793E-15  2.1375E-14  1.8868E-13  1.6191E-11
  4.5246E-15 -8.0793E-15  2.0721E-13 -1.0579E-13  1.5875E-14 -1.9814E-13
 -8.1850E-15  2.1375E-14 -1.0579E-13  9.0002E-14 -2.1709E-15  4.9039E-13
 -8.9507E-15  1.8868E-13  1.5875E-14 -2.1709E-15  6.4681E-13  3.7633E-12
 -5.6858E-12  1.6191E-11 -1.9814E-13  4.9039E-13  3.7633E-12  3.6686E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    5.146621  146.870284    0.281977    0.084955   -0.943314  2455592.041496
# Heliocentric elements and errors
Epoch:              2455590.5000  =  2011/01/29
Mean Anomaly:          167.53913 +/-     0.220
Argument of Peri:      261.14505 +/-     0.221
Long of Asc Node:       73.52043 +/-     0.011
Inclination:             5.27472 +/-     0.000
Eccentricity:         0.22742891 +/-    0.0001
Semi-Major Axis:     39.32110434 +/-    0.0058
Time of Perihelion: 2413677.3087 +/-      54.4
Perihelion:          30.37834841 +/-    0.0061
Aphelion:            48.26386027 +/-    0.0082
Period (y)              246.5737 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -39.98885007 +/-    0.0015
Ecliptic Y           26.43613955 +/-    0.0010
Ecliptic Z            4.23254519 +/-    0.0002
Ecliptic XDOT        -0.00127369 +/-    0.0000
Ecliptic YDOT        -0.00177363 +/-    0.0000
Ecliptic ZDOT         0.00006631 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   48.12371602 +/-    0.0014
Geocenter to KBO     47.18324171 +/-    0.0018
# Hcoef:  5.77

The following table shows the complete astrometric record for 13CD223. 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 (13CD223) followed by the observatory code and reference code for the source of the astrometry.

2011 01  30.54073  10 03 42.272  +17 23 13.51  22.7w 13CD223   F51  C~1w3t      
2011 01  30.55593  10 03 42.212  +17 23 13.79  22.8w 13CD223   F51  C~1w3t      
2011 01  30.57329  10 03 42.145  +17 23 14.13  22.6w 13CD223   F51  C~1w3t      
2011 01  30.58840  10 03 42.083  +17 23 14.69  22.8w 13CD223   F51  C~1w3t      
2011 05  29.26496  09 58 46.573  +17 42 03.17  22.9w 13CD223   F51  C~1w3t      
2011 10  29.61482  10 09 14.685  +16 45 38.41  22.7w 13CD223   F51  C~1w3t      
2011 10  29.62536  10 09 14.707  +16 45 38.34  22.6w 13CD223   F51  C~1w3t      
2012 02  01.57109  10 07 24.888  +17 04 58.13  22.0g 13CD223   F51  C~1w3t      
2012 02  15.35870  10 06 26.407  +17 10 33.55  22.8w 13CD223   F51  C~1w3t      
2012 02  15.37255  10 06 26.342  +17 10 33.79  22.8w 13CD223   F51  C~1w3t      
2012 02  15.38641  10 06 26.275  +17 10 34.17  22.9w 13CD223   F51  C~1w3t      
2012 02  15.40044  10 06 26.213  +17 10 34.44  22.9w 13CD223   F51  C~1w3t      
2013 02  09.37868  10 10 38.513  +16 49 14.25  22.3w 13CD223   F51  C~1w3t      
2013 02  09.39363  10 10 38.445  +16 49 14.63  22.6w 13CD223   F51  C~1w3t      
2013 02  09.40872  10 10 38.391  +16 49 14.78  22.2w 13CD223   F51  C~1w3t      
2013 02  09.42385  10 10 38.322  +16 49 15.32  22.4w 13CD223   F51  C~1w3t      
2014 02  10.40458  10 14 24.126  +16 30 03.98  21.6i 13CD223   F51  C~1w3t      
2014 02  10.42835  10 14 24.012  +16 30 04.61  21.5i 13CD223   F51  C~1w3t      

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     0.10
  2   0.0000     -0.90     0.04      -0.04     0.04
  3   0.0001     -1.92     0.14      -0.05    -0.01
  4   0.0001     -2.95     0.09       0.16     0.18
  5   0.3250  -4359.44    -0.09    -403.62    -0.14
  6   0.7449   5256.48    -0.14    -430.80    -0.13
  7   0.7449   5256.80    -0.20    -430.76    -0.15
  8   1.0049   3371.12     0.29      94.90    -0.28
  9   1.0426   2468.20    -0.03     112.84     0.18
 10   1.0427   2467.24    -0.05     112.73     0.07
 11   1.0427   2466.21    -0.15     112.75     0.08
 12   1.0427   2465.29    -0.13     112.69     0.02
 13   2.0283   6305.03     0.04     200.31     0.03
 14   2.0283   6303.99    -0.01     200.31     0.02
 15   2.0284   6303.21     0.22     200.18    -0.13
 16   2.0284   6302.09     0.11     200.33     0.01
 17   3.0304   9749.20     0.02     292.98     0.06
 18   3.0305   9747.44    -0.15     292.97     0.04

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.

13CD223    quality flag:3

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

axisobj        39.404    39.422    39.386
ecceobj         0.226     0.226     0.226
incobj          5.270     5.270     5.270
qmin           29.847    29.870    29.839
qmax           49.347    49.423    49.466
amean          39.455    39.455    39.455
amin           39.106    39.095    39.100
amax           39.881    39.885    39.880
emean           0.221     0.221     0.221
emin            0.202     0.202     0.201
emax            0.240     0.240     0.241
imean           3.907     3.883     3.939
imin            2.791     2.800     2.785
imax            5.137     5.069     5.231
excite_mean     0.232     0.232     0.232
fracstop        1.000     1.000     1.000
cjmean          2.990     2.990     2.990

libcent 0       179.4     179.7     179.2
libamp  0        27.4      30.8      28.1
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       184.1     184.6     184.0
kozaiamp        179.9     179.9     179.9