Orbit Fit and Astrometric record for 02GU32

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: 02GU32    
# Created Sat Oct 21 01:37:18 2017
# Orbit generated from Bernstein formalism
# Fitting    5 observations of    5
# Arc:  69.94d
# First observation: 2002/04/08
#  Last observation: 2002/06/17
Preliminary a, adot, b, bdot, g, gdot:
  -0.000001   0.024743   0.000001  -0.011176   0.027518   0.000000
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# Chi-squared of fit:     2.76 DOF:    5 RMS:  0.13
# Min/Max residuals:    -0.19    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.594182E-05  2.930976E-02 -5.524020E-06 -1.118826E-02  2.842789E-02  9.153385E-03
# Covariance matrix:
  1.1700E-11  2.2029E-08 -2.0471E-12  2.1341E-10  3.8375E-09  9.9752E-09
  2.2029E-08  4.4876E-05 -4.1808E-09  4.7339E-07  7.7375E-06  2.6964E-06
 -2.0471E-12 -4.1808E-09  8.8564E-13 -4.6995E-11 -7.2032E-10 -1.2925E-10
  2.1341E-10  4.7339E-07 -4.6995E-11  5.9583E-09  7.9717E-08 -3.9540E-07
  3.8375E-09  7.7375E-06 -7.2032E-10  7.9717E-08  1.3380E-06  1.3329E-06
  9.9752E-09  2.6964E-06 -1.2925E-10 -3.9540E-07  1.3329E-06  1.9326E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
    5.169623 -135.139381    0.445047    0.081009   -0.896035  2452372.799043
# Heliocentric elements and errors
Epoch:              2452370.5000  =  2002/04/06
Mean Anomaly:           37.04030 +/-    36.827
Argument of Peri:       96.28044 +/-    52.786
Long of Asc Node:       57.19522 +/-     2.928
Inclination:            21.33906 +/-     4.342
Eccentricity:         0.33652534 +/-    0.4849
Semi-Major Axis:     45.41678882 +/-   22.3871
Time of Perihelion: 2440867.9259 +/-    7645.8
Perihelion:          30.13288838 +/-   26.5616
Aphelion:            60.70068926 +/-   37.1505
Period (y)              306.0785 +/-    226.31
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -25.78326184 +/-    1.0105
Ecliptic Y          -25.02624731 +/-    1.0055
Ecliptic Z            3.16938597 +/-    0.1290
Ecliptic XDOT         0.00129164 +/-    0.0010
Ecliptic YDOT        -0.00269003 +/-    0.0010
Ecliptic ZDOT        -0.00099349 +/-    0.0001
# Distances at JD0 (AU)
Heliocenter to KBO   36.07124413 +/-    1.0042
Geocenter to KBO     35.17671839 +/-    1.4313
# Hcoef:  6.93

The following table shows the complete astrometric record for 02GU32. 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 (02GU32) followed by the observatory code and reference code for the source of the astrometry.

2002 04  08.29830  14 55 46.55   -11 20 54.4   21.7R 02GU32    807  Cf5154      
2002 04  09.25899  14 55 41.93   -11 20 36.0         02GU32    807  Cf5154      
2002 04  09.32228  14 55 41.62   -11 20 34.7         02GU32    807  Cf5154      
2002 06  17.19260  14 49 48.69   -11 03 08.3   22.7R 02GU32    695  Cf8973      
2002 06  17.23960  14 49 48.49   -11 03 07.6         02GU32    695  Cf8973      

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     0.07       0.00    -0.14
  2   0.0026    -70.37    -0.04      -1.92     0.02
  3   0.0028    -75.11    -0.04      -1.99     0.12
  4   0.1914  -5349.74     0.15    -506.91    -0.19
  5   0.1915  -5352.76    -0.15    -507.10     0.19

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.

02GU32    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