Orbit Fit and Astrometric record for 04PW117

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: 04PW117   
# Created Thu Oct 18 01:08:29 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   19 observations of   19
# Arc:   9.14y
# First observation: 2004/08/15
#  Last observation: 2013/10/06
# Chi-squared of fit:    14.82 DOF:   32 RMS:  0.16
# Min/Max residuals:    -0.30    0.37
# Exact a, adot, b, bdot, g, gdot:
  1.454350E-05  2.002852E-02  1.114752E-06 -4.325649E-04  2.222492E-02  4.355924E-04
# Covariance matrix:
  2.5908E-13 -1.9708E-13 -3.7634E-15  3.7785E-15  1.2464E-13 -1.0633E-12
 -1.9708E-13  2.5573E-13  5.3938E-15 -5.3178E-15 -1.9846E-13  1.5041E-12
 -3.7634E-15  5.3938E-15  1.3344E-13 -2.1447E-14 -5.4183E-15  3.3089E-14
  3.7785E-15 -5.3178E-15 -2.1447E-14  8.3110E-15  4.2166E-15 -3.2300E-14
  1.2464E-13 -1.9846E-13 -5.4183E-15  4.2166E-15  4.2775E-13 -1.2829E-12
 -1.0633E-12  1.5041E-12  3.3089E-14 -3.2300E-14 -1.2829E-12  9.1620E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.428691  -50.293335   -0.231442   -0.024627   -0.989821  2453232.847393
# Heliocentric elements and errors
Epoch:              2453232.5000  =  2004/08/15
Mean Anomaly:          152.14761 +/-     0.164
Argument of Peri:       73.32199 +/-     0.156
Long of Asc Node:       81.32566 +/-     0.006
Inclination:             1.86141 +/-     0.000
Eccentricity:         0.06429831 +/-    0.0001
Semi-Major Axis:     43.47371844 +/-    0.0063
Time of Perihelion: 2408983.7266 +/-      48.6
Perihelion:          40.67843194 +/-    0.0065
Aphelion:            46.26900494 +/-    0.0072
Period (y)              286.6476 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           29.54314136 +/-    0.0008
Ecliptic Y          -35.21683277 +/-    0.0010
Ecliptic Z           -1.12175759 +/-    0.0000
Ecliptic XDOT         0.00192964 +/-    0.0000
Ecliptic YDOT         0.00152899 +/-    0.0000
Ecliptic ZDOT        -0.00005450 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.98129165 +/-    0.0010
Geocenter to KBO     44.99454916 +/-    0.0013
# Hcoef:  6.62

The following table shows the complete astrometric record for 04PW117. 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 (04PW117) followed by the observatory code and reference code for the source of the astrometry.

2004 08  15.34665  20 50 12.48   -19 11 45.5   23.2g 04PW117   568  C~0VDs      
2004 08  15.37789  20 50 12.33   -19 11 45.9   23.2g 04PW117   568  C~0VDs      
2004 08  15.40976  20 50 12.20   -19 11 46.4   22.9g 04PW117   568  C~0VDs      
2004 08  16.31716  20 50 08.23   -19 12 02.0   23.0g 04PW117   568  C~0VDs      
2004 10  04.25118  20 47 28.84   -19 21 40.2   22.8i 04PW117   568  C~0VDs      
2004 10  04.30342  20 47 28.74   -19 21 40.4   22.5i 04PW117   568  C~0VDs      
2004 10  04.35551  20 47 28.65   -19 21 40.7   22.7i 04PW117   568  C~0VDs      
2006 07  20.43163  21 01 31.26   -18 28 28.2         04PW117   568  C~0VDs      
2006 07  20.45812  21 01 31.13   -18 28 28.7   23.3r 04PW117   568  C~0VDs      
2006 07  20.48451  21 01 31.02   -18 28 29.3   23.1r 04PW117   568  C~0VDs      
2006 07  26.36959  21 01 05.48   -18 30 20.6   22.9r 04PW117   568  C~0VDs      
2006 07  26.39553  21 01 05.37   -18 30 21.0   23.0r 04PW117   568  C~0VDs      
2006 07  26.42148  21 01 05.25   -18 30 21.5   22.8r 04PW117   568  C~0VDs      
2006 10  21.91619  20 56 26.57   -18 48 23.5         04PW117   950  C~0VDs      
2008 06  07.31922  21 13 04.37   -17 40 18.5         04PW117   807  C~0VDs      
2008 06  07.39576  21 13 04.21   -17 40 19.2         04PW117   807  C~0VDs      
2013 10  05.14698  21 28 42.99   -16 35 23.0   22.3R 04PW117   695  C~0zda      
2013 10  05.26521  21 28 42.71   -16 35 23.9         04PW117   695  C~0zda      
2013 10  06.16468  21 28 40.62   -16 35 32.3         04PW117   695  C~0zda      

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     0.07       0.00    -0.29
  2   0.0001      0.00    -0.09       0.00    -0.15
  3   0.0002      0.00     0.10       0.00    -0.10
  4   0.0027      0.00    -0.06       0.00    -0.23
  5   0.1366      0.00     0.32       0.00     0.05
  6   0.1368      0.00     0.18       0.00     0.11
  7   0.1369      0.00     0.18       0.00     0.05
  8   1.9277      0.00    -0.08       0.00     0.22
  9   1.9278      0.00    -0.30       0.00     0.22
 10   1.9278      0.00    -0.22       0.00     0.12
 11   1.9439      0.00     0.00       0.00     0.00
 12   1.9440      0.00     0.09       0.00     0.10
 13   1.9441      0.00     0.03       0.00     0.10
 14   2.1836      0.00    -0.10       0.00     0.08
 15   3.8110      0.00     0.37       0.00    -0.00
 16   3.8112      0.00     0.19       0.00     0.09
 17   9.1384      0.00     0.04       0.00    -0.20
 18   9.1387      0.00     0.13       0.00     0.01
 19   9.1412      0.00    -0.10       0.00     0.02

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.

04PW117    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        43.654    43.654    43.654
ecceobj         0.058     0.058     0.058
incobj          1.865     1.865     1.865
qmin           38.127    38.109    38.057
qmax           49.826    49.859    49.882
amean          43.710    43.694    43.694
amin           43.295    43.308    43.297
amax           44.179    44.200    44.197
emean           0.084     0.083     0.084
emin            0.043     0.043     0.043
emax            0.128     0.128     0.129
imean           0.879     0.877     0.888
imin            0.626     0.626     0.626
imax            1.210     1.205     1.212
excite_mean     0.085     0.084     0.085
fracstop        1.000     1.000     1.000
cjmean          3.089     3.089     3.088

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       185.3     184.9     185.5
kozaiamp        179.9     179.9     179.9