Orbit Fit and Astrometric record for 05PS21

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: 05PS21    
# Created Tue Dec 12 02:37:29 2017
# Orbit generated from Bernstein formalism
# Fitting   12 observations of   14
# Arc:   9.13y
# First observation: 2005/08/09
#  Last observation: 2014/09/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000419   0.021509   0.000012  -0.000832   0.022078   0.000000
# Chi-squared of fit:     5.38 DOF:   18 RMS:  0.12
# Min/Max residuals:    -0.21    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.527483E-05  2.102634E-02 -1.271791E-06 -8.111843E-04  2.267630E-02 -1.500937E-03
# Covariance matrix:
  4.9509E-13 -4.4312E-13 -8.7006E-15  1.8448E-14  3.1742E-13 -2.3317E-12
 -4.4312E-13  6.5447E-13  1.3968E-14 -2.8122E-14 -3.0077E-13  3.5470E-12
 -8.7006E-15  1.3968E-14  1.9416E-13 -2.5564E-14 -5.1296E-15  7.6304E-14
  1.8448E-14 -2.8122E-14 -2.5564E-14  9.7626E-15  1.4067E-14 -1.5471E-13
  3.1742E-13 -3.0077E-13 -5.1296E-15  1.4067E-14  6.3333E-13 -1.7941E-12
 -2.3317E-12  3.5470E-12  7.6304E-14 -1.5471E-13 -1.7941E-12  1.9519E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.409829  -23.001624    0.349415    0.023594   -0.953786  2453591.736023
# Heliocentric elements and errors
Epoch:              2453590.5000  =  2005/08/08
Mean Anomaly:          262.07250 +/-     0.098
Argument of Peri:      254.75449 +/-     0.078
Long of Asc Node:      188.53452 +/-     0.003
Inclination:             2.60401 +/-     0.000
Eccentricity:         0.07927525 +/-    0.0002
Semi-Major Axis:     44.29898867 +/-    0.0071
Time of Perihelion: 2482885.3515 +/-      28.6
Perihelion:          40.78717505 +/-    0.0120
Aphelion:            47.81080229 +/-    0.0127
Period (y)              294.8485 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           41.31824934 +/-    0.0014
Ecliptic Y          -17.92184013 +/-    0.0006
Ecliptic Z            1.08493439 +/-    0.0000
Ecliptic XDOT         0.00082904 +/-    0.0000
Ecliptic YDOT         0.00239983 +/-    0.0000
Ecliptic ZDOT        -0.00010234 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.05071770 +/-    0.0013
Geocenter to KBO     44.09891465 +/-    0.0015
# Hcoef:  6.57

The following table shows the complete astrometric record for 05PS21. 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 (05PS21) followed by the observatory code and reference code for the source of the astrometry.

2005 08  09.23528  22 32 46.31   -07 37 56.0   22.2R 05PS21    807  Co4015      
2005 08  10.08200  22 32 42.99   -07 38 15.5         05PS21    807  Co4015      
2005 08  10.21627  22 32 42.45   -07 38 18.6         05PS21    807  Co4015      
2005 11  03.14059  22 27 52.34   -08 08 30.0   23.2R 05PS21    695  Cp0721      
2005 11  03.22311  22 27 52.23   -08 08 30.8         05PS21    695  Cp0721      
2006 08  21.18123  22 36 34.01   -07 18 26.3   21.8R 05PS21    807  Cv1996      
2006 08  21.27218  22 36 33.63   -07 18 28.7         05PS21    807  Cv1996      
2007 07  11.35529  22 43 30.51   -06 40 10.8         05PS21    304  Cv1996      
2007 07  11.40631  22 43 30.39   -06 40 11.4         05PS21    304  Cv1996      
2009 09  18.16234  22 48 26.52   -06 16 28.1   23.4R 05PS21    688  C~09bV      
2009 09  18.20630  22 48 26.34   -06 16 29.1         05PS21    688  C~09bV      
2014 09  26.22134  23 11 08.89   -04 12 01.0   23.1R 05PS21    695  C~1LJR      
2014 09  26.28346  23 11 08.63   -04 12 02.8         05PS21    695  C~1LJR      
2014 09  26.34035  23 11 08.40   -04 12 03.8         05PS21    695  C~1LJR      

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    -0.13       0.00     0.15
  2   0.0023    -53.07     0.06       0.11     0.14
  3   0.0027    -61.68     0.07       0.20     0.17
  4   0.2352  -4737.07    -0.01     -97.57    -0.15
  5   0.2354  -4738.88    -0.01     -97.72    -0.14
  6   1.0320   3579.25     0.01    -168.00    -0.07
  7   1.0323   3573.10     0.03    -168.13    -0.21
  8   1.9196  10196.91    -0.06    -352.54     0.02
  9   1.9197  10195.02     0.03    -352.42     0.07
 10   4.1093  14837.21 (   0.10)   -694.01 (   0.47)
 11   4.1094  14834.33 (   0.17)   -693.92 (   0.59)
 12   9.1307  36855.87     0.01   -1571.27    -0.07
 13   9.1309  36851.45    -0.13   -1571.43    -0.18
 14   9.1310  36847.78     0.12   -1571.02     0.27

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.

05PS21    quality flag:2

Type:      CLASSICAL   9:5EEEE CLASSICAL

axisobj        44.664    44.685    44.642
ecceobj         0.082     0.081     0.082
incobj          2.590     2.590     2.590
qmin           39.528    39.997    39.735
qmax           49.811    49.426    49.488
amean          44.518    44.554    44.494
amin           44.158    44.175    44.139
amax           44.926    44.970    44.876
emean           0.091     0.086     0.088
emin            0.071     0.072     0.071
emax            0.109     0.100     0.104
imean           3.252     3.395     3.288
imin            2.573     2.800     2.579
imax            4.026     3.983     4.011
excite_mean     0.108     0.104     0.105
fracstop        1.000     1.000     1.000
cjmean          3.094     3.095     3.094

libcent 0      -180.0     178.9    -180.0
libamp  0      -180.0     176.4    -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       179.0     179.1     188.0
kozaiamp        180.0     180.0     180.0