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 Sat Mar 30 01:12:10 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     20 observations of     20
# Arc:  19.06y
# First observation: 2004/08/15
#  Last observation: 2023/09/06
# Chi-squared of fit:     7.65 DOF:     34 RMS:  0.11
# Min/Max residuals:    -0.26    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.348916E-05  1.994279E-02 -8.041819E-07 -1.269571E-03  2.215062E-02  1.741545E-03
# Covariance matrix:
  1.3744E-13 -3.4215E-14 -1.7385E-15  1.7019E-15 -2.4169E-14 -7.1394E-14
 -3.4215E-14  2.8856E-14  1.6851E-15 -1.7118E-15  4.7434E-14  7.1514E-14
 -1.7385E-15  1.6851E-15  1.1036E-13 -7.6749E-15  1.1760E-15  4.5405E-15
  1.7019E-15 -1.7118E-15 -7.6749E-15  1.6523E-15 -2.3852E-15 -4.5253E-15
 -2.4169E-14  4.7434E-14  1.1760E-15 -2.3852E-15  4.9271E-13  9.4181E-14
 -7.1394E-14  7.1514E-14  4.5405E-15 -4.5253E-15  9.4181E-14  1.8945E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.900485  -46.534050   -0.166222   -0.015706   -1.003015  2453232.858973
# Heliocentric elements and errors
Epoch:              2453232.5000  =  2004/08/15
Mean Anomaly:          111.27761 +/-     0.055
Argument of Peri:       71.87818 +/-     0.042
Long of Asc Node:      120.11051 +/-     0.001
Inclination:             3.75237 +/-     0.000
Eccentricity:         0.10281627 +/-    0.0000
Semi-Major Axis:     44.11760683 +/-    0.0049
Time of Perihelion: 2420148.2252 +/-      17.2
Perihelion:          39.58159925 +/-    0.0048
Aphelion:            48.65361441 +/-    0.0057
Period (y)              293.0395 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           31.85983231 +/-    0.0010
Ecliptic Y          -33.37377992 +/-    0.0010
Ecliptic Z           -0.70950190 +/-    0.0000
Ecliptic XDOT         0.00193347 +/-    0.0000
Ecliptic YDOT         0.00153428 +/-    0.0000
Ecliptic ZDOT        -0.00016018 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.14494587 +/-    0.0010
Geocenter to KBO     45.14543764 +/-    0.0014
# Hcoef:  6.46

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      
2023 09  06.162010 22 27 22.679  -11 59 29.94  22.8G 04PX117   G37  C~7APT      
2023 09  06.208150 22 27 22.489  -11 59 30.83        04PX117   G37  C~7APT      
2023 09  06.246830 22 27 22.321  -11 59 31.76        04PX117   G37  C~7APT      

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     0.16       0.00     0.02
     2   0.0001      0.00    -0.00       0.00     0.13
     3   0.0002      0.00     0.04       0.00     0.05
     4   0.0027      0.00    -0.26       0.00     0.06
     5   0.1367      0.00     0.10       0.00     0.02
     6   0.1368      0.00     0.16       0.00    -0.18
     7   0.1370      0.00    -0.08       0.00    -0.19
     8   0.9555      0.00    -0.14       0.00     0.07
     9   0.9556      0.00    -0.07       0.00    -0.06
    10   0.9557      0.00     0.11       0.00    -0.08
    11   0.9584      0.00    -0.00       0.00    -0.11
    12   1.9277      0.00     0.04       0.00    -0.01
    13   1.9277      0.00     0.04       0.00     0.11
    14   1.9278      0.00     0.04       0.00     0.03
    15   9.1412      0.00     0.06       0.00    -0.05
    16   9.1439      0.00     0.06       0.00     0.20
    17   9.1442      0.00    -0.20       0.00     0.13
    18  19.0576      0.00     0.06       0.00    -0.17
    19  19.0578      0.00     0.05       0.00     0.02
    20  19.0579      0.00    -0.08       0.00     0.01

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        44.307    44.307    44.307
ecceobj         0.096     0.096     0.096
incobj          3.746     3.746     3.746
qmin           39.221    39.295    39.239
qmax           49.721    49.647    49.652
amean          44.326    44.327    44.326
amin           43.973    43.968    43.954
amax           44.715    44.711    44.709
emean           0.095     0.095     0.095
emin            0.079     0.078     0.079
emax            0.112     0.111     0.111
imean           2.367     2.371     2.366
imin            1.519     1.534     1.528
imax            3.129     3.124     3.124
excite_mean     0.104     0.104     0.104
fracstop        1.000     1.000     1.000
cjmean          3.092     3.092     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       183.2     184.1     183.6
kozaiamp        180.0     180.0     179.9