Orbit Fit and Astrometric record for 02GY32

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: 02GY32    
# Created Fri Oct 20 01:37:21 2017
# Orbit generated from Bernstein formalism
# Fitting   18 observations of   21
# Arc:  14.16y
# First observation: 2001/03/25
#  Last observation: 2015/05/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.002596   0.032649  -0.000079   0.001006   0.027580   0.000000
# Chi-squared of fit:    24.03 DOF:   30 RMS:  0.20
# Min/Max residuals:    -0.40    0.43
# Exact a, adot, b, bdot, g, gdot:
  1.856951E-05  3.114300E-02  1.565057E-06  9.572231E-04  2.850482E-02  8.474098E-04
# Covariance matrix:
  3.6275E-13 -1.1931E-13  4.2652E-15 -3.6473E-15  1.8537E-13 -2.4574E-13
 -1.1931E-13  8.3813E-14 -3.2603E-15  2.6549E-15 -9.1632E-15  1.7827E-13
  4.2652E-15 -3.2603E-15  1.4349E-13 -1.2840E-14  3.4699E-16 -7.1483E-15
 -3.6473E-15  2.6549E-15 -1.2840E-14  2.6088E-15 -6.6148E-16  5.8471E-15
  1.8537E-13 -9.1632E-15  3.4699E-16 -6.6148E-16  3.7831E-13 -4.6243E-14
 -2.4574E-13  1.7827E-13 -7.1483E-15  5.8471E-15 -4.6243E-14  3.9274E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.421121 -146.839260    0.471920   -0.006666   -0.883677  2451993.886383
# Heliocentric elements and errors
Epoch:              2451990.5000  =  2001/03/22
Mean Anomaly:            9.72935 +/-     0.011
Argument of Peri:      335.28274 +/-     0.013
Long of Asc Node:      225.51631 +/-     0.001
Inclination:             1.80999 +/-     0.000
Eccentricity:         0.08575792 +/-    0.0001
Semi-Major Axis:     39.27232235 +/-    0.0040
Time of Perihelion: 2449561.0409 +/-       2.8
Perihelion:          35.90440957 +/-    0.0047
Aphelion:            42.64023514 +/-    0.0052
Period (y)              246.1150 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -30.36116928 +/-    0.0006
Ecliptic Y          -19.27251197 +/-    0.0004
Ecliptic Z           -0.25776084 +/-    0.0000
Ecliptic XDOT         0.00155914 +/-    0.0000
Ecliptic YDOT        -0.00254609 +/-    0.0000
Ecliptic ZDOT         0.00009153 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.96243538 +/-    0.0006
Geocenter to KBO     35.08179083 +/-    0.0008
# Hcoef:  7.06

The following table shows the complete astrometric record for 02GY32. 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 (02GY32) followed by the observatory code and reference code for the source of the astrometry.

2001 03  25.38564  14 03 10.72   -12 57 45.9   24.3R 02GY32    695  Cj8745      
2001 03  25.48509  14 03 10.28   -12 57 43.3         02GY32    695  Cj8745      
2002 04  06.19153  14 09 13.26   -13 25 58.8   21.4R 02GY32    807  Cf5154      
2002 04  06.33003  14 09 12.56   -13 25 55.5         02GY32    807  Cf5154      
2002 04  07.25776  14 09 07.88   -13 25 30.4         02GY32    807  Cf5154      
2002 04  11.41567  14 08 46.61   -13 23 38.1   21.6R 02GY32    568  Cf5154      
2002 04  11.49657  14 08 46.18   -13 23 35.9         02GY32    568  Cf5154      
2002 08  09.01499  14 03 31.29   -12 54 05.2   22.1R 02GY32    807  Ch1599      
2002 08  10.01380  14 03 34.04   -12 54 18.6         02GY32    807  Ch1599      
2002 08  11.01712  14 03 36.68   -12 54 31.3         02GY32    807  Ch1599      
2002 08  12.01394  14 03 39.50   -12 54 44.9         02GY32    807  Ch1599      
2003 03  06.49622  14 18 18.65   -14 09 09.4   22.2R 02GY32    662  Ch8265      
2003 03  06.53066  14 18 18.53   -14 09 08.4         02GY32    662  Ch8265      
2003 04  21.15961  14 14 56.93   -13 51 52.6   20.4R 02GY32    304  Ch8265      
2003 04  21.24663  14 14 56.47   -13 51 50.2         02GY32    304  Ch8265      
2008 04  05.37669  14 51 38.47   -16 28 43.3   22.8R 02GY32    688  Cy5685      
2008 04  05.46970  14 51 38.02   -16 28 41.1         02GY32    688  Cy5685      
2015 05  20.19139  15 38 02.13   -19 04 21.4   24.0V 02GY32    W84  C~1Tia      
2015 05  22.27165  15 37 50.45   -19 03 41.1         02GY32    W84  C~1Tia      
2015 05  23.18491  15 37 45.38   -19 03 23.3         02GY32    W84  C~1Tia      
2015 05  24.18398  15 37 39.84   -19 03 04.0         02GY32    W84  C~1Tia      

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    -0.27       0.00    -0.21
  2   0.0003     -6.93    -0.02       0.25     0.05
  3   1.0316   5556.20    -0.00     201.56    -0.05
  4   1.0320   5545.46     0.23     201.24    -0.36
  5   1.0346   5472.67    -0.07     201.93    -0.01
  6   1.0459   5142.41     0.31     203.31    -0.03
  7   1.0462   5135.75     0.29     203.27    -0.06
  8   1.3734    207.26    -0.24     310.14    -0.02
  9   1.3761    249.63 (   1.71)    311.27 (   0.04)
 10   1.3789    290.24     0.16     312.51     0.20
 11   1.3816    333.64     0.10     313.80     0.43
 12   1.9469  13930.37 (  -0.39)    392.75 (   0.65)
 13   1.9470  13928.38 (  -0.80)    393.12 (   1.03)
 14   2.0719  10805.64    -0.36     406.45     0.08
 15   2.0722  10798.50    -0.17     406.50     0.13
 16   7.0308  44689.29     0.17    1400.30    -0.17
 17   7.0310  44682.14    -0.12    1400.53     0.03
 18  14.1514  89951.34     0.04    2931.94    -0.08
 19  14.1571  89748.57    -0.40    2932.46    -0.18
 20  14.1596  89660.51    -0.06    2932.99     0.07
 21  14.1624  89564.36     0.42    2933.40     0.21

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.

02GY32    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.199    39.211    39.187
ecceobj         0.084     0.084     0.084
incobj          1.809     1.809     1.809
qmin           34.975    34.968    34.965
qmax           44.237    44.205    44.210
amean          39.461    39.461    39.461
amin           39.146    39.130    39.154
amax           39.819    39.827    39.802
emean           0.094     0.093     0.094
emin            0.075     0.075     0.076
emax            0.112     0.110     0.111
imean           3.556     3.581     3.538
imin            2.626     2.624     2.627
imax            4.259     4.295     4.234
excite_mean     0.113     0.112     0.113
fracstop        1.000     1.000     1.000
cjmean          3.037     3.037     3.037

libcent 0       179.8     179.7     179.7
libamp  0        31.8      36.9      23.8
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       180.5     181.1     180.2
kozaiamp        179.9     180.0     180.0