Orbit Fit and Astrometric record for 05PT21

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: 05PT21    
# Created Tue Oct 24 01:37:36 2017
# Orbit generated from Bernstein formalism
# Fitting   15 observations of   15
# Arc:   3.21y
# First observation: 2005/08/09
#  Last observation: 2008/10/24
Preliminary a, adot, b, bdot, g, gdot:
   0.000161   0.025604  -0.000030  -0.003409   0.023976   0.000000
# Chi-squared of fit:     5.16 DOF:   24 RMS:  0.10
# Min/Max residuals:    -0.19    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.694241E-05  2.629512E-02 -2.259302E-06 -3.524734E-03  2.420932E-02  9.148725E-03
# Covariance matrix:
  3.3760E-13 -4.7101E-13 -1.8761E-14  7.1038E-14  9.6190E-14 -6.6749E-12
 -4.7101E-13  1.9991E-12  9.7215E-14 -3.4993E-13  2.1838E-13  3.2886E-11
 -1.8761E-14  9.7215E-14  1.8469E-13 -1.0151E-13  1.2783E-14  1.6731E-12
  7.1038E-14 -3.4993E-13 -1.0151E-13  1.5248E-13 -3.9806E-14 -6.0228E-12
  9.6190E-14  2.1838E-13  1.2783E-14 -3.9806E-14  2.7352E-13  3.7427E-12
 -6.6749E-12  3.2886E-11  1.6731E-12 -6.0228E-12  3.7427E-12  5.6601E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.330933  -18.939307    0.415757    0.037828   -0.926317  2453591.759423
# Heliocentric elements and errors
Epoch:              2453590.5000  =  2005/08/08
Mean Anomaly:           17.05515 +/-     0.041
Argument of Peri:      106.88073 +/-     0.060
Long of Asc Node:      177.12275 +/-     0.001
Inclination:             7.91957 +/-     0.001
Eccentricity:         0.51993825 +/-    0.0011
Semi-Major Axis:     74.55744635 +/-    0.1195
Time of Perihelion: 2442450.4262 +/-       2.8
Perihelion:          35.79217845 +/-    0.0971
Aphelion:           113.32271425 +/-    0.1978
Period (y)              643.7908 +/-      1.55
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           39.77587497 +/-    0.0008
Ecliptic Y          -14.09033034 +/-    0.0003
Ecliptic Z            1.67988285 +/-    0.0000
Ecliptic XDOT         0.00195991 +/-    0.0000
Ecliptic YDOT         0.00246513 +/-    0.0000
Ecliptic ZDOT        -0.00035618 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.23126383 +/-    0.0008
Geocenter to KBO     41.30641208 +/-    0.0009
# Hcoef:  7.10

The following table shows the complete astrometric record for 05PT21. 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 (05PT21) followed by the observatory code and reference code for the source of the astrometry.

2005 08  09.25868  22 46 32.79   -05 15 37.6   22.1R 05PT21    807  Co4015      
2005 08  10.09741  22 46 29.53   -05 15 58.2         05PT21    807  Co4015      
2005 08  10.23568  22 46 28.99   -05 16 01.6         05PT21    807  Co4015      
2005 10  28.33942  22 41 37.04   -05 49 37.9   24.0R 05PT21    568  Cp2094      
2005 10  28.38963  22 41 36.96   -05 49 38.6         05PT21    568  Cp2094      
2005 11  02.14682  22 41 28.70   -05 50 53.4   23.0R 05PT21    695  Cp0721      
2005 11  03.15923  22 41 27.18   -05 51 08.0         05PT21    695  Cp0721      
2005 11  03.21838  22 41 27.07   -05 51 08.7         05PT21    695  Cp0721      
2006 08  22.22873  22 51 32.78   -04 58 16.1   22.2R 05PT21    807  Cs2735      
2006 08  23.15560  22 51 28.94   -04 58 41.0         05PT21    807  Cs2735      
2006 08  23.22281  22 51 28.63   -04 58 43.0         05PT21    807  Cs2735      
2007 07  12.38543  22 59 31.40   -04 21 31.9         05PT21    304  Cv1996      
2007 07  12.44263  22 59 31.28   -04 21 32.5         05PT21    304  Cv1996      
2008 10  24.15157  22 58 59.27   -04 40 50.9   23.9r 05PT21    695  C~0gMH      
2008 10  24.25969  22 58 58.99   -04 40 53.1   23.8r 05PT21    695  C~0gMH      

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     0.05       0.00    -0.01
  2   0.0023    -52.87    -0.15      -0.68    -0.11
  3   0.0027    -61.62    -0.04      -0.78    -0.16
  4   0.2192  -4859.74    -0.09    -225.74     0.03
  5   0.2194  -4861.11     0.24    -225.94     0.05
  6   0.2324  -5003.53     0.05    -248.94     0.01
  7   0.2352  -5030.05     0.05    -253.94    -0.06
  8   0.2353  -5031.84    -0.17    -253.98     0.18
  9   1.0348   4543.24     0.02    -733.71     0.00
 10   1.0374   4480.67     0.22    -734.96     0.04
 11   1.0375   4475.62    -0.19    -735.05     0.02
 12   1.9223  12011.84     0.00   -1423.10     0.01
 13   1.9225  12009.95     0.08   -1422.97     0.10
 14   3.2085  11122.29    -0.00   -2311.72    -0.02
 15   3.2088  11117.57    -0.07   -2312.15    -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.

05PT21    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        75.351    75.709    74.997
ecceobj         0.523     0.526     0.520
incobj          7.886     7.886     7.885
qmin           35.193    35.034    35.295
qmax          116.560   119.982   116.548
amean          74.183    75.894    73.634
amin           72.613    74.261    71.934
amax           76.287    78.013    76.323
emean           0.513     0.525     0.509
emin            0.499     0.510     0.494
emax            0.529     0.541     0.527
imean           8.312     8.158     8.319
imin            7.475     7.329     7.478
imax            9.122     9.131     9.016
excite_mean     0.533     0.544     0.529
fracstop        1.000     1.000     1.000
cjmean          3.072     3.071     3.074

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       198.8     170.8     184.8
kozaiamp        180.0     180.0     180.0