Orbit Fit and Astrometric record for 05PL21

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: 05PL21    
# Created Fri Oct 20 01:37:39 2017
# Orbit generated from Bernstein formalism
# Fitting    9 observations of   10
# Arc:   8.97y
# First observation: 2005/08/08
#  Last observation: 2014/07/29
Preliminary a, adot, b, bdot, g, gdot:
   0.000131   0.023212   0.000004   0.000298   0.023827   0.000000
# Chi-squared of fit:     2.79 DOF:   12 RMS:  0.10
# Min/Max residuals:    -0.23    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.573405E-05  2.355398E-02  2.086907E-07  3.068059E-04  2.385439E-02  3.054889E-03
# Covariance matrix:
  4.9456E-13 -4.4169E-13  1.7966E-15 -5.0478E-15  3.7608E-13 -1.7861E-12
 -4.4169E-13  7.3466E-13 -2.3978E-15  8.9074E-15 -9.1518E-13  3.1543E-12
  1.7966E-15 -2.3978E-15  2.6082E-13 -3.6539E-14 -7.2891E-15 -1.1462E-14
 -5.0478E-15  8.9074E-15 -3.6539E-14  1.3967E-14 -1.0375E-14  3.9068E-14
  3.7608E-13 -9.1518E-13 -7.2891E-15 -1.0375E-14  4.3485E-12 -3.7060E-12
 -1.7861E-12  3.1543E-12 -1.1462E-14  3.9068E-14 -3.7060E-12  1.3832E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -4.792864  -42.589891    0.028780   -0.084757   -1.012211  2453590.591843
# Heliocentric elements and errors
Epoch:              2453590.5000  =  2005/08/08
Mean Anomaly:           52.28195 +/-     0.077
Argument of Peri:      211.48075 +/-     0.094
Long of Asc Node:       38.37465 +/-     0.003
Inclination:             4.73781 +/-     0.000
Eccentricity:         0.15029500 +/-    0.0003
Semi-Major Axis:     46.45143788 +/-    0.0217
Time of Perihelion: 2436796.7989 +/-      21.8
Perihelion:          39.47001895 +/-    0.0227
Aphelion:            53.43285680 +/-    0.0282
Period (y)              316.5971 +/-      0.22
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           31.47961041 +/-    0.0027
Ecliptic Y          -28.98003883 +/-    0.0025
Ecliptic Z           -3.50264536 +/-    0.0003
Ecliptic XDOT         0.00209047 +/-    0.0000
Ecliptic YDOT         0.00174500 +/-    0.0000
Ecliptic ZDOT         0.00000582 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.93107321 +/-    0.0026
Geocenter to KBO     41.92100771 +/-    0.0037
# Hcoef:  6.57

The following table shows the complete astrometric record for 05PL21. 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 (05PL21) followed by the observatory code and reference code for the source of the astrometry.

2005 08  08.09110  21 25 37.87   -20 10 35.1   22.1R 05PL21    807  Co4015      
2005 08  08.20764  21 25 37.31   -20 10 37.5         05PL21    807  Co4015      
2005 08  09.09588  21 25 33.11   -20 10 57.1         05PL21    807  Co4015      
2006 08  21.16475  21 30 01.84   -19 48 42.1   22.1R 05PL21    807  Cv1996      
2006 08  21.25662  21 30 01.40   -19 48 43.9         05PL21    807  Cv1996      
2006 08  22.16026  21 29 57.20   -19 49 01.7         05PL21    807  Cv1996      
2007 07  11.34205  21 38 23.91   -19 06 25.9         05PL21    304  Cv1996      
2007 07  11.39325  21 38 23.72   -19 06 26.9         05PL21    304  Cv1996      
2014 07  29.36389  22 12 49.49   -15 54 40.6   23.5R 05PL21    G37  C~16aZ      
2014 07  29.41200  22 12 49.30   -15 54 41.9         05PL21    G37  C~16aZ      

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    -0.02       0.00    -0.00
  2   0.0003     -8.24     0.04       0.18     0.15
  3   0.0028    -70.54    -0.01       0.00    -0.07
  4   1.0351   3945.55     0.02      73.58    -0.23
  5   1.0354   3939.09    -0.02      73.85    -0.14
  6   1.0378   3877.21 (   0.16)     75.83 (   0.46)
  7   1.9227  11496.40    -0.05     172.28     0.12
  8   1.9228  11493.52     0.04     172.22     0.20
  9   8.9727  43826.70    -0.00     559.29     0.07
 10   8.9728  43823.53     0.00     559.10    -0.09

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.

05PL21    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.575    46.641    46.509
ecceobj         0.147     0.148     0.147
incobj          4.736     4.736     4.736
qmin           39.150    39.140    39.102
qmax           54.429    54.565    54.276
amean          46.595    46.643    46.515
amin           46.183    46.242    46.127
amax           47.057    47.096    46.957
emean           0.143     0.145     0.143
emin            0.131     0.132     0.130
emax            0.158     0.159     0.156
imean           3.999     4.003     3.999
imin            3.582     3.589     3.568
imax            4.492     4.504     4.494
excite_mean     0.160     0.161     0.159
fracstop        1.000     1.000     1.000
cjmean          3.102     3.102     3.101

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       188.0     188.3     188.9
kozaiamp        180.0     180.0     180.0