Orbit Fit and Astrometric record for 02PQ149

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: 02PQ149   
# Created Thu Oct 19 01:37:19 2017
# Orbit generated from Bernstein formalism
# Fitting    6 observations of    6
# Arc:  86.99d
# First observation: 2002/08/11
#  Last observation: 2002/11/06
Preliminary a, adot, b, bdot, g, gdot:
  -0.000001   0.036855   0.000001  -0.014940   0.029438   0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit:     3.18 DOF:    7 RMS:  0.13
# Min/Max residuals:    -0.26    0.16
# Exact a, adot, b, bdot, g, gdot:
  1.598988E-05  2.807517E-02 -7.278887E-06 -1.515199E-02  2.806373E-02 -6.723010E-03
# Covariance matrix:
  1.1932E-12  7.1463E-10  7.1086E-15 -8.0990E-12  1.5016E-10  2.3828E-09
  7.1463E-10  1.6542E-06 -5.2638E-11  3.7691E-08  2.6211E-07 -1.0124E-05
  7.1086E-15 -5.2638E-11  4.9885E-13 -5.1945E-12 -5.5174E-12  8.4446E-10
 -8.0990E-12  3.7691E-08 -5.1945E-12  2.4161E-09  3.6667E-09 -6.5720E-07
  1.5016E-10  2.6211E-07 -5.5174E-12  3.6667E-09  4.4984E-08 -9.6530E-07
  2.3828E-09 -1.0124E-05  8.4446E-10 -6.5720E-07 -9.6530E-07  1.8014E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.299850  -20.754560    0.364284    0.004958   -0.949760  2452497.840143
# Heliocentric elements and errors
Epoch:              2452490.5000  =  2002/08/04
Mean Anomaly:          331.77453 +/-    19.869
Argument of Peri:      233.72727 +/-    47.900
Long of Asc Node:      159.22143 +/-     0.020
Inclination:            28.45536 +/-     1.082
Eccentricity:         0.32509309 +/-    0.4286
Semi-Major Axis:     48.65831744 +/-   16.4201
Time of Perihelion: 2462210.6461 +/-    4755.2
Perihelion:          32.83983464 +/-   23.6156
Aphelion:            64.47680024 +/-   30.1381
Period (y)              339.4250 +/-    171.81
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           34.07934140 +/-    0.2518
Ecliptic Y          -13.29842166 +/-    0.0954
Ecliptic Z            0.18620024 +/-    0.0014
Ecliptic XDOT         0.00035676 +/-    0.0012
Ecliptic YDOT         0.00278828 +/-    0.0005
Ecliptic ZDOT        -0.00148141 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.58256688 +/-    0.2371
Geocenter to KBO     35.63318294 +/-    0.2693
# Hcoef:  7.11

The following table shows the complete astrometric record for 02PQ149. 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 (02PQ149) followed by the observatory code and reference code for the source of the astrometry.

2002 08  11.33940  22 42 51.46   -07 49 31.5   21.5R 02PQ149   807  Cg3357      
2002 08  12.30468  22 42 47.05   -07 50 06.4         02PQ149   807  Cg3357      
2002 08  12.38292  22 42 46.67   -07 50 09.3         02PQ149   807  Cg3357      
2002 11  05.30179  22 37 09.01   -08 36 59.7   23.4R 02PQ149   568  Cl8391      
2002 11  05.38405  22 37 08.91   -08 37 00.9         02PQ149   568  Cl8391      
2002 11  06.32880  22 37 07.68   -08 37 17.1         02PQ149   568  Cl8391      

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    -0.04       0.00    -0.26
  2   0.0026    -73.84     0.13      -7.74     0.11
  3   0.0029    -80.16    -0.09      -8.31     0.16
  4   0.2354  -5781.61    -0.16    -741.33    -0.04
  5   0.2356  -5783.43     0.16    -741.89     0.06
  6   0.2382  -5806.41    -0.00    -750.15    -0.03

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.

02PQ149    quality flag:0

Type:      ERR2LARGE ERR2LARGE ERR2LARGE

axisobj         0.000     0.000     0.000
ecceobj        -1.000    -1.000    -1.000
incobj         -1.000    -1.000    -1.000
qmin            0.000     0.000     0.000
qmax            0.000     0.000     0.000
amean           0.000     0.000     0.000
amin            0.000     0.000     0.000
amax            0.000     0.000     0.000
emean           0.000     0.000     0.000
emin            0.000     0.000     0.000
emax            0.000     0.000     0.000
imean           0.000     0.000     0.000
imin            0.000     0.000     0.000
imax            0.000     0.000     0.000
excite_mean     0.000     0.000     0.000
fracstop        0.000     0.000     0.000
cjmean          0.000     0.000     0.000

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         0.0       0.0       0.0
kozaiamp          0.0       0.0       0.0