Orbit Fit and Astrometric record for 05CD81

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: 05CD81    
# Created Tue Oct 24 01:37:34 2017
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   17
# Arc:   8.08y
# First observation: 2005/02/10
#  Last observation: 2013/03/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000179   0.018164   0.000082  -0.007106   0.022342   0.000000
# Chi-squared of fit:    12.83 DOF:   28 RMS:  0.15
# Min/Max residuals:    -0.41    0.32
# Exact a, adot, b, bdot, g, gdot:
  1.144650E-05  1.814828E-02 -4.654721E-06 -7.089320E-03  2.261479E-02  1.713198E-04
# Covariance matrix:
  1.8052E-13 -1.0208E-13 -2.0159E-14  3.3496E-14  1.9175E-14 -5.9071E-13
 -1.0208E-13  1.4851E-13  3.4454E-14 -5.7272E-14  2.3080E-14  1.0085E-12
 -2.0159E-14  3.4454E-14  1.4117E-13 -3.9477E-14  2.4757E-15  2.5897E-13
  3.3496E-14 -5.7272E-14 -3.9477E-14  3.8074E-14 -4.2259E-15 -4.3044E-13
  1.9175E-14  2.3080E-14  2.4757E-15 -4.2259E-15  2.7388E-13  6.7065E-14
 -5.9071E-13  1.0085E-12  2.5897E-13 -4.3044E-13  6.7065E-14  7.5825E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.501316  136.509487   -0.084461    0.008688   -0.979868  2453411.808073
# Heliocentric elements and errors
Epoch:              2453410.5000  =  2005/02/09
Mean Anomaly:          176.17452 +/-     0.051
Argument of Peri:        1.52434 +/-     0.048
Long of Asc Node:      317.87860 +/-     0.000
Inclination:            21.29432 +/-     0.000
Eccentricity:         0.14673627 +/-    0.0001
Semi-Major Axis:     39.42643763 +/-    0.0031
Time of Perihelion: 2499582.9518 +/-      11.9
Perihelion:          33.64114919 +/-    0.0036
Aphelion:            45.21172607 +/-    0.0043
Period (y)              247.5652 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -32.85274053 +/-    0.0007
Ecliptic Y           31.04454905 +/-    0.0007
Ecliptic Z            0.38667955 +/-    0.0000
Ecliptic XDOT        -0.00153280 +/-    0.0000
Ecliptic YDOT        -0.00158172 +/-    0.0000
Ecliptic ZDOT        -0.00085798 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.20194805 +/-    0.0007
Geocenter to KBO     44.21885735 +/-    0.0010
# Hcoef:  7.46

The following table shows the complete astrometric record for 05CD81. 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 (05CD81) followed by the observatory code and reference code for the source of the astrometry.

2005 02  10.30733  09 16 29.15   +16 21 59.5   23.6g 05CD81    568  C~0Ur8      
2005 02  10.39031  09 16 28.74   +16 22 01.0   23.8g 05CD81    568  C~0Ur8      
2005 02  10.42988  09 16 28.54   +16 22 01.8   24.1g 05CD81    568  C~0Ur8      
2005 02  15.33025  09 16 05.30   +16 23 26.1         05CD81    568  C~0Ur8      
2005 04  11.30208  09 12 53.41   +16 33 38.8   23.6i 05CD81    568  C~0Ur8      
2005 04  11.32677  09 12 53.37   +16 33 38.8   24.1i 05CD81    568  C~0Ur8      
2005 04  11.35652  09 12 53.31   +16 33 38.7   23.9i 05CD81    568  C~0Ur8      
2006 02  03.47073  09 20 40.08   +15 37 43.6         05CD81    568  C~0Ur8      
2006 02  06.32156  09 20 26.51   +15 38 35.1   23.2r 05CD81    568  C~0Ur8      
2006 02  06.36197  09 20 26.30   +15 38 35.9   23.2r 05CD81    568  C~0Ur8      
2006 02  06.40101  09 20 26.11   +15 38 36.4   23.2r 05CD81    568  C~0Ur8      
2006 11  23.52969  09 28 01.56   +14 42 44.8         05CD81    695  C~0Ur8      
2006 11  25.46227  09 28 00.38   +14 42 41.6         05CD81    695  C~0Ur8      
2008 05  04.16030  09 23 13.50   +14 29 16.3         05CD81    695  C~0Ur8      
2008 05  05.15245  09 23 13.66   +14 29 12.5         05CD81    695  C~0Ur8      
2013 03  13.14145  09 42 27.00   +10 49 37.3   23.0R 05CD81    G37  C~0qSY      
2013 03  13.19227  09 42 26.80   +10 49 38.2         05CD81    G37  C~0qSY      

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     0.26       0.00    -0.06
  2   0.0002     -6.08     0.14      -0.34    -0.06
  3   0.0003     -9.06    -0.00      -0.45     0.01
  4   0.0138   -353.39     0.32     -20.56    -0.09
  5   0.1643  -3170.88    -0.22    -259.48     0.18
  6   0.1643  -3171.43    -0.17    -259.65     0.13
  7   0.1644  -3172.22    -0.24    -260.00    -0.07
  8   0.9806   4253.75     0.10   -1434.14    -0.41
  9   0.9884   4051.29     0.11   -1444.96     0.14
 10   0.9885   4048.15    -0.12   -1445.12     0.14
 11   0.9886   4045.39    -0.06   -1445.48    -0.06
 12   1.7829  11363.84    -0.06   -2594.22     0.22
 13   1.7882  11348.54    -0.25   -2602.64    -0.03
 14   3.2275   7633.32    -0.01   -4664.08     0.03
 15   3.2302   7636.71     0.21   -4666.99    -0.05
 16   8.0844  28020.99    -0.04  -11878.97    -0.01
 17   8.0846  28017.85     0.04  -11879.07    -0.00

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.

05CD81    quality flag:3

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

axisobj        39.286    39.295    39.277
ecceobj         0.152     0.151     0.152
incobj         21.358    21.358    21.358
qmin           32.809    32.879    32.600
qmax           46.677    46.497    46.815
amean          39.456    39.456    39.456
amin           39.033    39.033    39.015
amax           39.921    39.921    39.919
emean           0.148     0.140     0.151
emin            0.118     0.109     0.122
emax            0.170     0.166     0.174
imean          22.857    23.076    22.792
imin           22.315    22.297    22.234
imax           23.438    23.775    23.342
excite_mean     0.416     0.417     0.416
fracstop        1.000     1.000     1.000
cjmean          2.850     2.848     2.849

libcent 0       180.6     179.6     180.0
libamp  0       100.2      96.9     100.1
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       185.8     185.7     184.9
kozaiamp        180.0     180.0     180.0