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 Fri Dec  3 02:10:15 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     25 observations of     25
# Arc:  16.10y
# First observation: 2005/02/10
#  Last observation: 2021/03/20
# Chi-squared of fit:    22.19 DOF:     44 RMS:  0.17
# Min/Max residuals:    -0.43    0.52
# Exact a, adot, b, bdot, g, gdot:
  1.156397E-05  1.814804E-02 -4.667275E-06 -7.089266E-03  2.261472E-02  1.697574E-04
# Covariance matrix:
  1.3819E-13 -3.5198E-14 -1.0974E-14  1.0850E-14  2.4527E-15 -9.2371E-14
 -3.5198E-14  3.2006E-14  1.2232E-14 -1.2131E-14  2.9802E-14  1.0283E-13
 -1.0974E-14  1.2232E-14  1.1459E-13 -1.2994E-14  1.0735E-14  4.1080E-14
  1.0850E-14 -1.2131E-14 -1.2994E-14  6.1394E-15 -1.0851E-14 -4.0726E-14
  2.4527E-15  2.9802E-14  1.0735E-14 -1.0851E-14  2.0700E-13  8.9481E-14
 -9.2371E-14  1.0283E-13  4.1080E-14 -4.0726E-14  8.9481E-14  3.4536E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.501316  136.509487   -0.084462    0.008687   -0.979869  2453411.808073
# Heliocentric elements and errors
Epoch:              2453412.5000  =  2005/02/11
Mean Anomaly:          176.21812 +/-     0.019
Argument of Peri:        1.49748 +/-     0.010
Long of Asc Node:      317.87859 +/-     0.000
Inclination:            21.29443 +/-     0.000
Eccentricity:         0.14674579 +/-    0.0000
Semi-Major Axis:     39.42607227 +/-    0.0024
Time of Perihelion: 2409151.4462 +/-       6.2
Perihelion:          33.64046201 +/-    0.0028
Aphelion:            45.21168253 +/-    0.0033
Period (y)              247.5617 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -32.85284393 +/-    0.0006
Ecliptic Y           31.04463998 +/-    0.0006
Ecliptic Z            0.38668020 +/-    0.0000
Ecliptic XDOT        -0.00153265 +/-    0.0000
Ecliptic YDOT        -0.00158184 +/-    0.0000
Ecliptic ZDOT        -0.00085798 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.20208051 +/-    0.0006
Geocenter to KBO     44.21902391 +/-    0.0009
# Hcoef:  7.00

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      
2019 04  05.157470 10 01 40.977  +06 33 33.90  23.4G 05CD81    G37  C~34bb      
2019 04  05.231450 10 01 40.757  +06 33 35.17        05CD81    G37  C~34bb      
2021 01  11.435390 10 14 05.548  +04 38 41.12  23.0G 05CD81    G37  C~4TyE      
2021 01  11.476360 10 14 05.416  +04 38 41.68        05CD81    G37  C~4TyE      
2021 01  11.516160 10 14 05.332  +04 38 42.00        05CD81    G37  C~4TyE      
2021 03  20.168040 10 09 19.917  +04 59 42.73  23.1G 05CD81    G37  C~4hk6      
2021 03  20.207240 10 09 19.754  +04 59 43.47        05CD81    G37  C~4hk6      
2021 03  20.246150 10 09 19.602  +04 59 44.31        05CD81    G37  C~4hk6      

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     0.21       0.00    -0.13
     2   0.0002      0.00     0.10       0.00    -0.09
     3   0.0003      0.00    -0.02       0.00     0.02
     4   0.0138      0.00     0.26       0.00    -0.17
     5   0.1643      0.00    -0.19       0.00     0.25
     6   0.1643      0.00    -0.15       0.00     0.19
     7   0.1644      0.00    -0.29       0.00     0.01
     8   0.9806      0.00    -0.03       0.00    -0.43
     9   0.9884      0.00     0.16       0.00     0.09
    10   0.9885      0.00    -0.06       0.00     0.16
    11   0.9886      0.00    -0.07       0.00    -0.05
    12   1.7829      0.00     0.04       0.00     0.20
    13   1.7882      0.00    -0.22       0.00     0.03
    14   3.2275      0.00     0.04       0.00     0.00
    15   3.2302      0.00     0.24       0.00    -0.14
    16   8.0844      0.00    -0.07       0.00     0.07
    17   8.0846      0.00     0.01       0.00     0.05
    18  14.1461      0.00    -0.04       0.00    -0.01
    19  14.1463      0.00     0.03       0.00    -0.04
    20  15.9182      0.00    -0.35       0.00    -0.14
    21  15.9183      0.00    -0.24       0.00     0.06
    22  15.9184      0.00     0.52       0.00     0.03
    23  16.1037      0.00     0.11       0.00     0.09
    24  16.1038      0.00    -0.00       0.00    -0.03
    25  16.1039      0.00     0.03       0.00    -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.

05CD81    quality flag:3

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

axisobj        39.286    39.286    39.286
ecceobj         0.152     0.152     0.152
incobj         21.358    21.358    21.358
qmin           32.792    32.794    32.790
qmax           46.665    46.666    46.670
amean          39.456    39.456    39.456
amin           39.034    39.035    39.034
amax           39.923    39.923    39.921
emean           0.148     0.148     0.148
emin            0.118     0.118     0.118
emax            0.170     0.170     0.170
imean          22.857    22.858    22.857
imin           22.319    22.318    22.322
imax           23.437    23.437    23.437
excite_mean     0.416     0.416     0.416
fracstop        1.000     1.000     1.000
cjmean          2.850     2.850     2.850

libcent 0       180.6     180.7     180.6
libamp  0       100.2     100.3     100.2
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       185.7     185.7     185.7
kozaiamp        180.0     180.0     180.0