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 Sep 27 01:12:43 2022
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     17 observations of     17
# Arc:  16.15y
# First observation: 2005/08/09
#  Last observation: 2021/10/03
# Chi-squared of fit:    16.93 DOF:     28 RMS:  0.18
# Min/Max residuals:    -0.27    0.55
# Exact a, adot, b, bdot, g, gdot:
  1.521626E-05  2.102652E-02 -7.586345E-07 -8.112718E-04  2.267621E-02 -1.500272E-03
# Covariance matrix:
  2.3799E-13 -4.4288E-14 -1.2014E-15  1.4658E-15  1.0992E-13 -1.0887E-13
 -4.4288E-14  3.5732E-14  1.5363E-15 -1.3463E-15  2.1155E-14  9.8488E-14
 -1.2014E-15  1.5363E-15  1.7235E-13 -1.3377E-14  1.7392E-15  4.4143E-15
  1.4658E-15 -1.3463E-15 -1.3377E-14  2.3094E-15 -8.0897E-17 -4.0660E-15
  1.0992E-13  2.1155E-14  1.7392E-15 -8.0897E-17  4.6584E-13  1.9376E-16
 -1.0887E-13  9.8488E-14  4.4143E-15 -4.0660E-15  1.9376E-16  2.9824E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.409829  -23.001624    0.349415    0.023594   -0.953786  2453591.736023
# Heliocentric elements and errors
Epoch:              2453592.5000  =  2005/08/10
Mean Anomaly:          262.08911 +/-     0.075
Argument of Peri:      254.74295 +/-     0.061
Long of Asc Node:      188.53253 +/-     0.001
Inclination:             2.60421 +/-     0.000
Eccentricity:         0.07923901 +/-    0.0000
Semi-Major Axis:     44.30018337 +/-    0.0051
Time of Perihelion: 2482883.5689 +/-      26.2
Perihelion:          40.78988070 +/-    0.0049
Aphelion:            47.81048603 +/-    0.0057
Period (y)              294.8604 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           41.31840252 +/-    0.0012
Ecliptic Y          -17.92190796 +/-    0.0005
Ecliptic Z            1.08496115 +/-    0.0000
Ecliptic XDOT         0.00082912 +/-    0.0000
Ecliptic YDOT         0.00239983 +/-    0.0000
Ecliptic ZDOT        -0.00010235 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.05093577 +/-    0.0011
Geocenter to KBO     44.09916259 +/-    0.0013
# Hcoef:  6.65

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      
2021 10  03.150850 23 43 37.674  -01 08 45.97  23.2G 05PS21    G37  C~555b      
2021 10  03.203930 23 43 37.468  -01 08 47.68        05PS21    G37  C~555b      
2021 10  03.256720 23 43 37.248  -01 08 49.08        05PS21    G37  C~555b      

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    -0.12       0.00    -0.01
     2   0.0023      0.00     0.06       0.00     0.06
     3   0.0027      0.00     0.05       0.00     0.09
     4   0.2352      0.00     0.07       0.00    -0.24
     5   0.2354      0.00     0.07       0.00    -0.24
     6   1.0320      0.00     0.05       0.00    -0.15
     7   1.0323      0.00     0.13       0.00    -0.27
     8   1.9196      0.00    -0.05       0.00    -0.07
     9   1.9197      0.00     0.01       0.00     0.00
    10   4.1093      0.00    -0.13       0.00     0.42
    11   4.1094      0.00    -0.11       0.00     0.55
    12   9.1307      0.00    -0.00       0.00    -0.02
    13   9.1309      0.00    -0.08       0.00    -0.18
    14   9.1310      0.00    -0.02       0.00     0.33
    15  16.1504      0.00    -0.12       0.00     0.06
    16  16.1505      0.00     0.10       0.00    -0.19
    17  16.1506      0.00     0.10       0.00    -0.15

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:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.665    44.665    44.665
ecceobj         0.082     0.082     0.082
incobj          2.590     2.590     2.590
qmin           39.430    39.482    39.490
qmax           49.983    49.946    50.039
amean          44.565    44.520    44.521
amin           44.161    44.156    44.150
amax           44.978    44.955    44.976
emean           0.094     0.091     0.091
emin            0.073     0.072     0.072
emax            0.112     0.111     0.113
imean           3.273     3.264     3.270
imin            2.591     2.582     2.575
imax            4.023     4.024     4.020
excite_mean     0.110     0.108     0.108
fracstop        1.000     1.000     1.000
cjmean          3.094     3.094     3.094

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       178.4     178.7     178.7
kozaiamp        180.0     179.8     180.0