Orbit Fit and Astrometric record for 02PX170

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: 02PX170   
# Created Mon Dec 18 02:37:12 2017
# Orbit generated from Bernstein formalism
# Fitting   27 observations of   28
# Arc:  12.21y
# First observation: 2002/08/05
#  Last observation: 2014/10/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000100   0.022904   0.000001  -0.000549   0.023669   0.000000
# Chi-squared of fit:    35.14 DOF:   48 RMS:  0.20
# Min/Max residuals:    -0.55    0.46
# Exact a, adot, b, bdot, g, gdot:
  1.526120E-05  2.291574E-02 -1.677303E-06 -5.475154E-04  2.391640E-02  1.117670E-03
# Covariance matrix:
  1.6400E-13 -1.3705E-13 -2.1974E-15  3.4271E-15  7.3578E-14 -5.1960E-13
 -1.3705E-13  2.0749E-13  3.2505E-15 -5.2496E-15 -1.4487E-14  7.8527E-13
 -2.1974E-15  3.2505E-15  6.8871E-14 -9.0626E-15 -8.5694E-16  1.2853E-14
  3.4271E-15 -5.2496E-15 -9.0626E-15  5.7911E-15  8.2118E-16 -2.0571E-14
  7.3578E-14 -1.4487E-14 -8.5694E-16  8.2118E-16  2.9875E-13 -1.5500E-13
 -5.1960E-13  7.8527E-13  1.2853E-14 -2.0571E-14 -1.5500E-13  3.0878E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.778034  -31.580384    0.277132   -0.013370   -0.979962  2452491.948573
# Heliocentric elements and errors
Epoch:              2452490.5000  =  2002/08/04
Mean Anomaly:           97.34322 +/-     0.139
Argument of Peri:      106.98163 +/-     0.126
Long of Asc Node:      119.10659 +/-     0.004
Inclination:             1.57051 +/-     0.000
Eccentricity:         0.04103073 +/-    0.0001
Semi-Major Axis:     42.49739204 +/-    0.0044
Time of Perihelion: 2425128.6764 +/-      38.8
Perihelion:          40.75369290 +/-    0.0051
Aphelion:            44.24109118 +/-    0.0054
Period (y)              277.0458 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           36.30674674 +/-    0.0008
Ecliptic Y          -22.63837046 +/-    0.0005
Ecliptic Z           -0.56780571 +/-    0.0000
Ecliptic XDOT         0.00147429 +/-    0.0000
Ecliptic YDOT         0.00216567 +/-    0.0000
Ecliptic ZDOT        -0.00006420 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.79016335 +/-    0.0007
Geocenter to KBO     41.81230464 +/-    0.0010
# Hcoef:  7.55

The following table shows the complete astrometric record for 02PX170. 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 (02PX170) followed by the observatory code and reference code for the source of the astrometry.

2002 08  05.44783  22 03 24.75   -12 45 11.7   22.9R 02PX170   568  Cp2009      
2002 08  05.51173  22 03 24.47   -12 45 13.2   23.1R 02PX170   568  Cp2009      
2002 08  05.57377  22 03 24.20   -12 45 14.5   23.1R 02PX170   568  Cp2009      
2002 08  09.43404  22 03 07.29   -12 46 49.4         02PX170   568  Cp2009      
2002 09  04.04466  22 01 11.95   -12 57 19.6         02PX170   950  Cp2009      
2002 09  04.09186  22 01 11.72   -12 57 20.5         02PX170   950  Cp2009      
2002 09  04.12284  22 01 11.60   -12 57 21.6   23.3R 02PX170   950  Cp2009      
2002 09  30.26756  21 59 28.59   -13 06 28.1         02PX170   568  Cp2010      
2002 09  30.32329  21 59 28.40   -13 06 29.1   23.3R 02PX170   568  Cp2010      
2002 09  30.38512  21 59 28.20   -13 06 30.4   23.1R 02PX170   568  Cp2010      
2003 06  24.52643  22 10 47.54   -12 05 59.1   24.2i 02PX170   568  Cp2010      
2003 06  25.50024  22 10 45.59   -12 06 11.6   23.6i 02PX170   568  Cp2010      
2003 06  25.55086  22 10 45.50   -12 06 12.1   23.6i 02PX170   568  Cp2010      
2003 06  25.59926  22 10 45.39   -12 06 12.6   23.5i 02PX170   568  Cp2010      
2003 07  29.15322  22 09 00.20   -12 16 31.6         02PX170   809  Cp2010      
2003 07  29.24417  22 08 59.81   -12 16 33.8         02PX170   809  Cp2010      
2003 07  29.32729  22 08 59.49   -12 16 35.5         02PX170   809  Cp2010      
2003 08  31.33777  22 06 34.17   -12 30 09.6   23.6g 02PX170   568  Cq9889      
2003 08  31.33942  22 06 34.19   -12 30 09.7   23.6g 02PX170   568  Cq9889      
2003 08  31.37215  22 06 34.02   -12 30 10.9   23.8g 02PX170   568  Cq9889      
2003 08  31.37380  22 06 34.03   -12 30 11.3   23.6g 02PX170   568  Cq9889      
2003 08  31.39849  22 06 33.92   -12 30 11.6   23.9g 02PX170   568  Cq9889      
2003 08  31.40015  22 06 33.91   -12 30 11.4   24.0g 02PX170   568  Cq9889      
2003 09  04.44932  22 06 17.10   -12 31 56.6   23.8g 02PX170   568  Cq9889      
2004 09  07.21489  22 11 03.60   -12 07 24.5   23.3R 02PX170   695  Cp2010      
2004 09  07.31565  22 11 03.12   -12 07 26.7   23.2R 02PX170   695  Cp2010      
2014 10  22.14157  22 57 34.04   -07 51 48.7   23.4R 02PX170   G37  C~1BxC      
2014 10  22.24868  22 57 33.73   -07 51 50.5         02PX170   G37  C~1BxC      

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    -0.02       0.00     0.27
  2   0.0002     -4.36     0.03       0.02     0.30
  3   0.0003     -8.52     0.15       0.17     0.46
  4   0.0109   -273.46    -0.03      -2.91    -0.38
  5   0.0810  -2074.05     0.15     -10.02    -0.23
  6   0.0812  -2077.52    -0.02      -9.70     0.07
  7   0.0812  -2079.54     0.10     -10.13    -0.37
  8   0.1528  -3681.34     0.01      -4.36     0.16
  9   0.1530  -3684.29    -0.01      -4.35     0.13
 10   0.1531  -3687.48     0.03      -4.56    -0.14
 11   0.8845   6901.87     0.14     -71.68     0.31
 12   0.8872   6870.67    -0.24     -73.25    -0.04
 13   0.8873   6869.25     0.04     -73.25     0.01
 14   0.8875   6867.57    -0.03     -73.15     0.16
 15   0.9793   5204.63     0.12    -107.62    -0.09
 16   0.9796   5198.50    -0.15    -107.66    -0.09
 17   0.9798   5193.51     0.23    -107.60     0.00
 18   1.0702   2913.28    -0.29    -121.81     0.33
 19   1.0702   2913.52     0.07    -122.01     0.13
 20   1.0703   2910.77    -0.35    -122.26    -0.12
 21   1.0703   2910.76    -0.24    -122.68    -0.55
 22   1.0704   2909.15    -0.09    -122.40    -0.27
 23   1.0704   2909.08    -0.04    -122.16    -0.04
 24   1.0815   2641.63 (  14.30)   -134.52 ( -12.15)
 25   2.0911   7092.14     0.42    -235.04    -0.21
 26   2.0914   7084.77     0.03    -234.60     0.18
 27  12.2127  52115.03     0.02   -1349.21     0.04
 28  12.2130  52109.77    -0.03   -1349.08    -0.00

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.

02PX170    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.807    42.820    42.793
ecceobj         0.039     0.039     0.039
incobj          1.569     1.569     1.569
qmin           40.390    40.385    40.299
qmax           45.206    45.205    45.232
amean          42.711    42.725    42.690
amin           42.383    42.397    42.371
amax           43.043    43.060    43.027
emean           0.031     0.031     0.031
emin            0.009     0.010     0.008
emax            0.051     0.051     0.052
imean           1.642     1.636     1.652
imin            0.314     0.314     0.314
imax            2.446     2.432     2.471
excite_mean     0.045     0.045     0.045
fracstop        1.000     1.000     1.000
cjmean          3.084     3.084     3.084

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       174.5     174.5     174.1
kozaiamp        180.0     180.0     180.0