Orbit Fit and Astrometric record for 04PB108

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: 04PB108   
# Created Thu Feb 21 02:08:29 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   42 observations of   42
# Arc:   5.16y
# First observation: 2004/08/14
#  Last observation: 2009/10/12
# Chi-squared of fit:   342.24 DOF:   78 RMS:  0.50
# Min/Max residuals:    -1.39    0.71
# Exact a, adot, b, bdot, g, gdot:
  1.319660E-05  2.118542E-02 -4.146004E-06 -7.550553E-03  2.339874E-02 -2.178084E-03
# Covariance matrix:
  1.6374E-13 -1.1055E-13 -1.7423E-14  2.7255E-14 -3.7083E-15 -8.5853E-13
 -1.1055E-13  1.5732E-13  3.5265E-14 -5.5479E-14  3.3375E-14  1.7447E-12
 -1.7423E-14  3.5265E-14  1.3861E-13 -5.7455E-14  6.8338E-15  4.4777E-13
  2.7255E-14 -5.5479E-14 -5.7455E-14  4.2082E-14 -1.2332E-14 -7.0382E-13
 -3.7083E-15  3.3375E-14  6.8338E-15 -1.2332E-14  1.3579E-13  3.7340E-13
 -8.5853E-13  1.7447E-12  4.4777E-13 -7.0382E-13  3.7340E-13  2.2139E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -4.858300  -19.079091    0.331458   -0.081317   -0.958001  2453231.838713
# Heliocentric elements and errors
Epoch:              2453232.5000  =  2004/08/15
Mean Anomaly:          290.38369 +/-     0.022
Argument of Peri:      275.49515 +/-     0.040
Long of Asc Node:      147.46282 +/-     0.000
Inclination:            20.25016 +/-     0.000
Eccentricity:         0.10753875 +/-    0.0002
Semi-Major Axis:     44.89414460 +/-    0.0030
Time of Perihelion: 2474479.2009 +/-      11.1
Perihelion:          40.06628435 +/-    0.0096
Aphelion:            49.72200484 +/-    0.0098
Period (y)              300.8103 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           41.04093505 +/-    0.0006
Ecliptic Y          -14.54518109 +/-    0.0002
Ecliptic Z           -3.61969656 +/-    0.0001
Ecliptic XDOT         0.00049764 +/-    0.0000
Ecliptic YDOT         0.00244317 +/-    0.0000
Ecliptic ZDOT        -0.00085861 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.69243361 +/-    0.0006
Geocenter to KBO     42.73743469 +/-    0.0007
# Hcoef:  6.45

The following table shows the complete astrometric record for 04PB108. 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 (04PB108) followed by the observatory code and reference code for the source of the astrometry.

2004 08  14.33797  22 57 06.02   -11 57 42.3   21.7R 04PB108   807  Cl2777      
2004 08  15.27903  22 57 02.27   -11 58 11.4         04PB108   807  Cl2777      
2004 08  15.37092  22 57 01.87   -11 58 14.3         04PB108   807  Cl2777      
2004 09  13.24245  22 54 59.23   -12 13 07.5   21.5R 04PB108   304  Cl4404      
2004 09  13.29045  22 54 59.02   -12 13 08.9         04PB108   304  Cl4404      
2004 10  12.13642  22 53 07.42   -12 25 05.4   22.7R 04PB108   695  Cl8416      
2004 10  12.24202  22 53 07.07   -12 25 07.4         04PB108   695  Cl8416      
2005 07  11.35656  23 04 06.97   -11 37 22.9   22.8R 04PB108   304  Co3997      
2005 07  11.40919  23 04 06.87   -11 37 24.4         04PB108   304  Co3997      
2005 08  08.11196  23 02 46.26   -11 50 11.1   21.9R 04PB108   807  Co3997      
2005 08  08.22813  23 02 45.83   -11 50 14.8         04PB108   807  Co3997      
2005 08  09.11689  23 02 42.55   -11 50 42.3         04PB108   807  Co3997      
2005 10  01.17389  22 59 02.36   -12 17 09.1   22.8R 04PB108   688  Co3997      
2005 10  01.26594  22 59 02.13   -12 17 12.8         04PB108   688  Co3997      
2006 08  04.30877  23 08 17.15   -11 43 31.6   22.9R 04PB108   250  S~06Ak      
2006 08  04.36500  23 08 16.95   -11 43 33.3         04PB108   250  S~06Ak      
2006 08  04.36939  23 08 16.94   -11 43 33.5         04PB108   250  S~06Ak      
2006 08  04.37379  23 08 16.92   -11 43 33.6         04PB108   250  S~06Ak      
2007 07  11.53584  23 14 37.56   -11 27 29.5   23.4R 04PB108   250  S~06Ak      
2007 07  11.54348  23 14 37.55   -11 27 29.7         04PB108   250  S~06Ak      
2007 07  11.55112  23 14 37.53   -11 27 29.9         04PB108   250  S~06Ak      
2007 07  11.55876  23 14 37.52   -11 27 30.0         04PB108   250  S~06Ak      
2007 07  15.54209  23 14 29.86   -11 29 07.0         04PB108   250  S~06Ak      
2007 07  15.54973  23 14 29.85   -11 29 07.2         04PB108   250  S~06Ak      
2007 07  15.55737  23 14 29.83   -11 29 07.3         04PB108   250  S~06Ak      
2007 07  15.59834  23 14 29.75   -11 29 08.4         04PB108   250  S~06Ak      
2007 07  21.72473  23 14 15.57   -11 31 47.8         04PB108   250  S~06Ak      
2007 07  21.73237  23 14 15.55   -11 31 48.0         04PB108   250  S~06Ak      
2007 07  21.74070  23 14 15.53   -11 31 48.2         04PB108   250  S~06Ak      
2007 07  21.74834  23 14 15.51   -11 31 48.5         04PB108   250  S~06Ak      
2007 09  05.82682  23 11 27.39   -11 55 42.2         04PB108   250  S~06Ak      
2007 09  05.83515  23 11 27.36   -11 55 42.4         04PB108   250  S~06Ak      
2007 09  05.84279  23 11 27.32   -11 55 42.7         04PB108   250  S~06Ak      
2007 09  05.89418  23 11 27.10   -11 55 44.3         04PB108   250  S~06Ak      
2007 10  02.19406  23 09 35.90   -12 08 23.4         04PB108   250  S~06Ak      
2007 10  02.20031  23 09 35.87   -12 08 23.6         04PB108   250  S~06Ak      
2007 10  02.32740  23 09 35.37   -12 08 26.8         04PB108   250  S~06Ak      
2007 10  02.33642  23 09 35.33   -12 08 27.0         04PB108   250  S~06Ak      
2007 10  02.34476  23 09 35.30   -12 08 27.2         04PB108   250  S~06Ak      
2007 10  02.39267  23 09 35.11   -12 08 28.4         04PB108   250  S~06Ak      
2009 10  12.16729  23 19 37.71   -12 01 50.5   23.0R 04PB108   688  C~09xd      
2009 10  12.21627  23 19 37.49   -12 01 51.0         04PB108   688  C~09xd      

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     0.30       0.00    -0.09
  2   0.0026      0.00     0.27       0.00     0.27
  3   0.0028      0.00    -0.12       0.00     0.24
  4   0.0819      0.00     0.02       0.00    -0.11
  5   0.0820      0.00     0.00       0.00    -0.11
  6   0.1610      0.00    -0.38       0.00    -0.32
  7   0.1613      0.00    -0.36       0.00    -0.27
  8   0.9063      0.00    -0.30       0.00     0.12
  9   0.9064      0.00    -0.14       0.00    -0.15
 10   0.9823      0.00     0.42       0.00    -0.03
 11   0.9826      0.00     0.47       0.00    -0.13
 12   0.9850      0.00     0.43       0.00    -0.17
 13   1.1303      0.00    -1.26       0.00     0.65
 14   1.1305      0.00     0.71       0.00    -0.80
 15   1.9712      0.00     0.67       0.00    -0.52
 16   1.9713      0.00     0.55       0.00    -0.51
 17   1.9713      0.00     0.62       0.00    -0.58
 18   1.9714      0.00     0.55       0.00    -0.54
 19   2.9054      0.00     0.20       0.00     0.19
 20   2.9054      0.00     0.26       0.00     0.17
 21   2.9054      0.00     0.16       0.00     0.15
 22   2.9055      0.00     0.21       0.00     0.23
 23   2.9164      0.00     0.42       0.00    -0.21
 24   2.9164      0.00     0.51       0.00    -0.22
 25   2.9164      0.00     0.44       0.00    -0.12
 26   2.9165      0.00     0.52       0.00    -0.20
 27   2.9333      0.00    -1.36       0.00     0.12
 28   2.9333      0.00    -1.38       0.00     0.12
 29   2.9333      0.00    -1.36       0.00     0.15
 30   2.9334      0.00    -1.38       0.00     0.06
 31   3.0595      0.00    -0.18       0.00     0.54
 32   3.0595      0.00    -0.09       0.00     0.60
 33   3.0596      0.00    -0.19       0.00     0.54
 34   3.0597      0.00    -0.16       0.00     0.57
 35   3.1317      0.00     0.15       0.00     0.31
 36   3.1317      0.00     0.07       0.00     0.27
 37   3.1321      0.00     0.09       0.00     0.23
 38   3.1321      0.00     0.02       0.00     0.26
 39   3.1321      0.00     0.07       0.00     0.26
 40   3.1323      0.00     0.05       0.00     0.25
 41   5.1604      0.00     0.62       0.00    -1.39
 42   5.1605      0.00     0.05       0.00    -0.85

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.

04PB108    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        45.349    45.349    45.349
ecceobj         0.112     0.112     0.112
incobj         20.173    20.173    20.173
qmin           39.583    39.587    39.582
qmax           50.994    51.000    51.013
amean          45.152    45.153    45.151
amin           44.796    44.797    44.786
amax           45.547    45.545    45.545
emean           0.107     0.107     0.107
emin            0.095     0.095     0.095
emax            0.120     0.120     0.120
imean          19.190    19.190    19.190
imin           18.887    18.871    18.892
imax           19.552    19.550    19.557
excite_mean     0.346     0.346     0.346
fracstop        1.000     1.000     1.000
cjmean          2.967     2.967     2.967

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       180.6     180.4     180.4
kozaiamp        180.0     179.9     180.0