Orbit Fit and Astrometric record for 02PC171

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: 02PC171   
# Created Mon Oct 23 01:37:21 2017
# Orbit generated from Bernstein formalism
# Fitting   22 observations of   22
# Arc:  13.26y
# First observation: 2002/08/05
#  Last observation: 2015/11/08
Preliminary a, adot, b, bdot, g, gdot:
  -0.000010   0.023429  -0.000007   0.001454   0.023892   0.000000
# Chi-squared of fit:    74.52 DOF:   38 RMS:  0.33
# Min/Max residuals:    -0.79    0.64
# Exact a, adot, b, bdot, g, gdot:
  1.461683E-05  2.347266E-02 -5.392057E-07  1.456291E-03  2.395200E-02  1.080348E-03
# Covariance matrix:
  2.7263E-13 -2.5227E-14  1.2142E-15 -2.3192E-15  2.8315E-13 -1.2738E-13
 -2.5227E-14  1.5258E-13 -6.4030E-15  9.6068E-15  1.3977E-13  4.8421E-13
  1.2142E-15 -6.4030E-15  8.6253E-14 -9.9848E-15 -5.1956E-15 -2.1206E-14
 -2.3192E-15  9.6068E-15 -9.9848E-15  5.4740E-15  6.9937E-15  3.2021E-14
  2.8315E-13  1.3977E-13 -5.1956E-15  6.9937E-15  6.1216E-13  3.3561E-13
 -1.2738E-13  4.8421E-13 -2.1206E-14  3.2021E-14  3.3561E-13  1.6183E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.483979  -30.465783    0.295895   -0.008293   -0.974514  2452491.963623
# Heliocentric elements and errors
Epoch:              2452490.5000  =  2002/08/04
Mean Anomaly:           40.35553 +/-     0.066
Argument of Peri:      307.75509 +/-     0.076
Long of Asc Node:      336.70798 +/-     0.000
Inclination:             3.58842 +/-     0.000
Eccentricity:         0.05504208 +/-    0.0001
Semi-Major Axis:     44.53014538 +/-    0.0056
Time of Perihelion: 2440323.5938 +/-      19.9
Perihelion:          42.07911335 +/-    0.0063
Aphelion:            46.98117741 +/-    0.0068
Period (y)              297.1593 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           36.67455338 +/-    0.0012
Ecliptic Y          -21.91093295 +/-    0.0007
Ecliptic Z           -0.35265674 +/-    0.0000
Ecliptic XDOT         0.00146024 +/-    0.0000
Ecliptic YDOT         0.00224671 +/-    0.0000
Ecliptic ZDOT         0.00016562 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.72278333 +/-    0.0011
Geocenter to KBO     41.75016441 +/-    0.0014
# Hcoef:  7.68

The following table shows the complete astrometric record for 02PC171. 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 (02PC171) followed by the observatory code and reference code for the source of the astrometry.

2002 08  05.46288  22 07 16.20   -12 05 19.2   23.5R 02PC171   568  Cp2010      
2002 08  05.52504  22 07 15.93   -12 05 20.7   23.5R 02PC171   568  Cp2010      
2002 08  05.59101  22 07 15.63   -12 05 22.2   23.4R 02PC171   568  Cp2010      
2002 08  09.44654  22 06 58.82   -12 06 52.2         02PC171   568  Cp2010      
2002 09  04.25628  22 05 02.61   -12 17 05.0         02PC171   309  Cp2010      
2002 09  04.26240  22 05 02.59   -12 17 05.1         02PC171   309  Cp2010      
2002 09  04.30259  22 05 02.40   -12 17 06.0         02PC171   309  Cp2010      
2002 09  04.30893  22 05 02.37   -12 17 06.2         02PC171   309  Cp2010      
2002 09  30.28467  22 03 19.08   -12 25 56.4         02PC171   568  Cp2010      
2002 09  30.33935  22 03 18.89   -12 25 57.3         02PC171   568  Cp2010      
2002 09  30.40147  22 03 18.64   -12 25 58.7         02PC171   568  Cp2010      
2003 10  28.08099  22 07 10.34   -11 58 58.6         02PC171   309  Cp2010      
2003 10  28.14869  22 07 10.24   -11 58 58.9         02PC171   309  Cp2010      
2003 10  29.05427  22 07 08.96   -11 59 05.5         02PC171   309  Cp2010      
2003 10  29.13192  22 07 08.88   -11 59 06.0         02PC171   309  Cp2010      
2004 09  11.22046  22 14 30.29   -11 13 53.6         02PC171   695  Cp2010      
2004 09  11.28003  22 14 30.04   -11 13 55.1         02PC171   695  Cp2010      
2004 09  13.19258  22 14 21.91   -11 14 38.7   24.0r 02PC171   695  Cp2010      
2004 09  13.25263  22 14 21.65   -11 14 40.0   24.0r 02PC171   695  Cp2010      
2004 09  13.31249  22 14 21.43   -11 14 41.4   23.8r 02PC171   695  Cp2010      
2015 11  08.08221  23 04 34.30   -05 16 18.4   23.9R 02PC171   G37  C~1dc5      
2015 11  08.18608  23 04 34.02   -05 16 19.0         02PC171   G37  C~1dc5      

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     0.18       0.00     0.31
  2   0.0002     -4.23     0.20      -0.02     0.23
  3   0.0004     -8.88     0.06       0.12     0.29
  4   0.0109   -271.33    -0.17       2.25    -0.04
  5   0.0816  -2081.91    -0.19      23.66    -0.16
  6   0.0816  -2082.22    -0.08      23.67    -0.16
  7   0.0817  -2085.15    -0.21      23.80    -0.09
  8   0.0817  -2085.63    -0.25      23.76    -0.13
  9   0.1528  -3689.31     0.33      53.31     0.54
 10   0.1530  -3692.23     0.33      53.43     0.57
 11   0.1532  -3696.15    -0.29      53.39     0.43
 12   1.2282     52.92     0.25     386.58     0.04
 13   1.2284     51.44     0.31     386.82     0.15
 14   1.2309     31.54    -0.47     387.22    -0.59
 15   1.2311     30.27    -0.08     387.16    -0.79
 16   2.1020   7058.82     0.04     631.21    -0.05
 17   2.1022   7054.84     0.12     631.12    -0.22
 18   2.1074   6927.40    -0.17     633.02    -0.16
 19   2.1076   6923.36    -0.19     633.17    -0.09
 20   2.1077   6919.83     0.30     633.02    -0.33
 21  13.2584  57870.31     0.57    4006.52    -0.41
 22  13.2587  57865.90    -0.58    4007.62     0.64

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.

02PC171    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.880    44.897    44.863
ecceobj         0.060     0.060     0.060
incobj          3.573     3.573     3.573
qmin           41.523    41.527    41.521
qmax           48.212    48.262    48.170
amean          44.763    44.783    44.746
amin           44.412    44.434    44.400
amax           45.120    45.159    45.118
emean           0.055     0.056     0.055
emin            0.041     0.042     0.041
emax            0.069     0.069     0.068
imean           4.636     4.637     4.637
imin            4.076     4.079     4.072
imax            5.066     5.068     5.069
excite_mean     0.098     0.098     0.098
fracstop        1.000     1.000     1.000
cjmean          3.099     3.099     3.099

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       175.5     175.4     175.4
kozaiamp        180.0     180.0     180.0