Orbit Fit and Astrometric record for 04PX117

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: 04PX117   
# Created Tue Dec 12 02:37:26 2017
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   17
# Arc:   9.14y
# First observation: 2004/08/15
#  Last observation: 2013/10/07
Preliminary a, adot, b, bdot, g, gdot:
   0.000184   0.019645  -0.000011  -0.001250   0.022356   0.000000
# Chi-squared of fit:     5.92 DOF:   28 RMS:  0.10
# Min/Max residuals:    -0.21    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.342142E-05  1.994298E-02 -8.970633E-07 -1.269519E-03  2.215041E-02  1.742668E-03
# Covariance matrix:
  3.2919E-13 -4.2190E-13 -1.6723E-14  2.9297E-14  3.9810E-13 -2.5597E-12
 -4.2190E-13  8.1281E-13  3.3355E-14 -5.8396E-14 -8.0666E-13  5.1037E-12
 -1.6723E-14  3.3355E-14  1.2760E-13 -2.0276E-14 -3.5725E-14  2.1258E-13
  2.9297E-14 -5.8396E-14 -2.0276E-14  1.2409E-14  6.0919E-14 -3.7145E-13
  3.9810E-13 -8.0666E-13 -3.5725E-14  6.0919E-14  1.4236E-12 -5.3890E-12
 -2.5597E-12  5.1037E-12  2.1258E-13 -3.7145E-13 -5.3890E-12  3.2493E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.900485  -46.534050   -0.166223   -0.015705   -1.003015  2453232.858973
# Heliocentric elements and errors
Epoch:              2453230.5000  =  2004/08/13
Mean Anomaly:          111.22667 +/-     0.219
Argument of Peri:       71.91675 +/-     0.185
Long of Asc Node:      120.10977 +/-     0.001
Inclination:             3.75220 +/-     0.000
Eccentricity:         0.10284083 +/-    0.0001
Semi-Major Axis:     44.12034564 +/-    0.0136
Time of Perihelion: 2420158.2886 +/-      63.2
Perihelion:          39.58297282 +/-    0.0137
Aphelion:            48.65771847 +/-    0.0163
Period (y)              293.0668 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           31.86013246 +/-    0.0017
Ecliptic Y          -33.37410102 +/-    0.0018
Ecliptic Z           -0.70951301 +/-    0.0000
Ecliptic XDOT         0.00193360 +/-    0.0000
Ecliptic YDOT         0.00153421 +/-    0.0000
Ecliptic ZDOT        -0.00016017 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.14544472 +/-    0.0017
Geocenter to KBO     45.14590017 +/-    0.0024
# Hcoef:  6.79

The following table shows the complete astrometric record for 04PX117. 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 (04PX117) followed by the observatory code and reference code for the source of the astrometry.

2004 08  15.35823  21 04 48.56   -17 38 34.4   23.3g 04PX117   568  C~0VDs      
2004 08  15.38952  21 04 48.41   -17 38 34.9   23.2g 04PX117   568  C~0VDs      
2004 08  15.42170  21 04 48.27   -17 38 35.6   23.0g 04PX117   568  C~0VDs      
2004 08  16.33053  21 04 44.30   -17 38 53.0   23.5g 04PX117   568  C~0VDs      
2004 10  04.27709  21 01 58.77   -17 50 38.8   22.6i 04PX117   568  C~0VDs      
2004 10  04.32954  21 01 58.67   -17 50 39.4   22.6i 04PX117   568  C~0VDs      
2004 10  04.38195  21 01 58.55   -17 50 39.8   22.8i 04PX117   568  C~0VDs      
2005 07  30.37214  21 10 39.25   -17 17 30.7   23.3R 04PX117   568  C~0VDs      
2005 07  30.40485  21 10 39.11   -17 17 31.5   23.4R 04PX117   568  C~0VDs      
2005 07  30.44365  21 10 38.95   -17 17 32.3   23.6R 04PX117   568  C~0VDs      
2005 07  31.41751  21 10 34.70   -17 17 51.9   22.7r 04PX117   568  C~0VDs      
2006 07  20.43544  21 15 59.81   -16 57 59.9         04PX117   568  C~0VDs      
2006 07  20.46186  21 15 59.70   -16 58 00.3   23.2r 04PX117   568  C~0VDs      
2006 07  20.48828  21 15 59.59   -16 58 00.9   23.0r 04PX117   568  C~0VDs      
2013 10  06.19109  21 42 38.37   -15 21 29.1   22.6R 04PX117   695  C~0zda      
2013 10  07.16513  21 42 36.00   -15 21 39.8         04PX117   695  C~0zda      
2013 10  07.26769  21 42 35.73   -15 21 41.0         04PX117   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     0.17       0.00    -0.00
  2   0.0001     -2.20     0.05       0.14     0.14
  3   0.0002     -4.32     0.06       0.04     0.05
  4   0.0027    -63.67    -0.21      -0.33     0.15
  5   0.1367  -2531.68     0.08      -2.12     0.01
  6   0.1368  -2533.22     0.08      -2.29    -0.20
  7   0.1370  -2534.97    -0.15      -2.19    -0.14
  8   0.9555   5169.48    -0.11    -250.26     0.12
  9   0.9556   5167.32    -0.09    -250.44    -0.03
 10   0.9557   5164.90     0.07    -250.53    -0.10
 11   0.9584   5100.92    -0.04    -251.34    -0.09
 12   1.9277   9911.31     0.02    -501.15    -0.02
 13   1.9277   9909.68     0.05    -501.06     0.09
 14   1.9278   9907.99     0.03    -501.16     0.02
 15   9.1412  33882.15     0.04   -2323.57    -0.16
 16   9.1439  33845.29     0.11   -2322.24     0.07
 17   9.1442  33841.10    -0.15   -2322.07     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.

04PX117    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.310    44.351    44.269
ecceobj         0.096     0.097     0.096
incobj          3.746     3.746     3.746
qmin           39.262    39.258    39.217
qmax           49.654    49.698    49.673
amean          44.326    44.367    44.286
amin           43.976    44.003    43.930
amax           44.710    44.756    44.674
emean           0.095     0.095     0.095
emin            0.079     0.079     0.078
emax            0.111     0.111     0.112
imean           2.371     2.358     2.375
imin            1.536     1.513     1.540
imax            3.128     3.117     3.136
excite_mean     0.104     0.104     0.104
fracstop        1.000     1.000     1.000
cjmean          3.092     3.093     3.092

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       183.8     183.7     183.3
kozaiamp        179.9     180.0     180.0