Orbit Fit and Astrometric record for 02GY31

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: 02GY31    
# Created Fri Dec 15 02:37:09 2017
# Orbit generated from Bernstein formalism
# Fitting    5 observations of    5
# Arc:   4.41d
# First observation: 2002/04/06
#  Last observation: 2002/04/10
# WARNING Fitting with energy constraint
# WARNING and with gdot fixed = 0
# Chi-squared of fit:     2.38 DOF:    6 RMS:  0.12
# Min/Max residuals:    -0.24    0.18
# Exact a, adot, b, bdot, g, gdot:
  1.620471E-05  2.388634E-02  1.007907E-06 -2.033188E-04  2.407170E-02  0.000000E+00
# Covariance matrix:
  2.9197E-11  4.4139E-08  6.3947E-14  6.7189E-11  7.5595E-09  0.0000E+00
  4.4139E-08  6.8115E-05  9.8557E-11  1.0356E-07  1.1651E-05  0.0000E+00
  6.3947E-14  9.8557E-11  5.2741E-13 -4.8382E-11  1.6861E-11  0.0000E+00
  6.7189E-11  1.0356E-07 -4.8382E-11  1.0239E-08  1.7716E-08  0.0000E+00
  7.5595E-09  1.1651E-05  1.6861E-11  1.7716E-08  1.9932E-06  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  1.8354E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.138173 -141.096069    0.382426   -0.002286   -0.927210  2452370.711033
# Heliocentric elements and errors
Epoch:              2452370.5000  =  2002/04/06
Mean Anomaly:          353.89599 +/-   183.090
Argument of Peri:      202.42028 +/-   248.617
Long of Asc Node:       22.80637 +/-     9.544
Inclination:             0.50316 +/-     0.300
Eccentricity:         0.05642101 +/-    0.5462
Semi-Major Axis:     44.98969585 +/-   23.4528
Time of Perihelion: 2454239.3762 +/-  166272.6
Perihelion:          42.45133191 +/-   33.0701
Aphelion:            47.52805980 +/-   34.8965
Period (y)              301.7712 +/-    235.97
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -33.28889934 +/-    1.8962
Ecliptic Y          -26.36904469 +/-    1.5300
Ecliptic Z           -0.10015210 +/-    0.0059
Ecliptic XDOT         0.00169785 +/-    0.0013
Ecliptic YDOT        -0.00211551 +/-    0.0011
Ecliptic ZDOT        -0.00002291 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.46748600 +/-    1.7640
Geocenter to KBO     41.54255763 +/-    2.4365
# Hcoef:  6.52

The following table shows the complete astrometric record for 02GY31. 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 (02GY31) followed by the observatory code and reference code for the source of the astrometry.

2002 04  06.21029  14 25 53.11   -14 35 50.0   22.1R 02GY31    807  Cf5154      
2002 04  06.34935  14 25 52.53   -14 35 46.8         02GY31    807  Cf5154      
2002 04  07.32816  14 25 48.37   -14 35 26.7         02GY31    807  Cf5154      
2002 04  10.53025  14 25 34.52   -14 34 19.7   22.8R 02GY31    568  Cf5154      
2002 04  10.61862  14 25 34.11   -14 34 17.7         02GY31    568  Cf5154      

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    -0.11       0.00    -0.24
  2   0.0004     -9.00     0.04       0.34     0.18
  3   0.0031    -72.64     0.08       0.06     0.09
  4   0.0118   -284.57     0.12      -0.82    -0.02
  5   0.0121   -290.85    -0.14      -0.83    -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.

02GY31    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