Orbit Fit and Astrometric record for 00GX146

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: 00GX146   
# Created Thu Oct 19 01:37:07 2017
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   21
# Arc:  14.97y
# First observation: 2000/04/03
#  Last observation: 2015/03/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000159   0.022067   0.000005  -0.000239   0.021842   0.000000
# Chi-squared of fit:    13.43 DOF:   28 RMS:  0.16
# Min/Max residuals:    -0.34    0.40
# Exact a, adot, b, bdot, g, gdot:
  1.481048E-05  2.137927E-02  1.465596E-06 -2.318734E-04  2.288949E-02 -5.042101E-08
# Covariance matrix:
  1.4013E-13 -6.7182E-14 -1.5300E-16  6.1073E-16  2.5177E-15 -1.8114E-13
 -6.7182E-14  3.4787E-13  1.0485E-15 -3.6006E-15 -3.2135E-13  1.0688E-12
 -1.5300E-16  1.0485E-15  1.2688E-13 -9.5016E-15 -1.2833E-15  3.2245E-15
  6.1073E-16 -3.6006E-15 -9.5016E-15  2.1604E-15  3.2071E-15 -1.1139E-14
  2.5177E-15 -3.2135E-13 -1.2833E-15  3.2071E-15  1.0175E-12 -9.5409E-13
 -1.8114E-13  1.0688E-12  3.2245E-15 -1.1139E-14 -9.5409E-13  3.3064E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.287215 -170.811680   -0.084679   -0.005242   -1.003721  2451637.870353
# Heliocentric elements and errors
Epoch:              2451630.5000  =  2000/03/27
Mean Anomaly:          167.93712 +/-     0.342
Argument of Peri:       35.97904 +/-     0.335
Long of Asc Node:      344.91924 +/-     0.005
Inclination:             0.68012 +/-     0.000
Eccentricity:         0.01865281 +/-    0.0001
Semi-Major Axis:     43.88370978 +/-    0.0089
Time of Perihelion: 2508279.7755 +/-      99.6
Perihelion:          43.06515510 +/-    0.0110
Aphelion:            44.70226446 +/-    0.0112
Period (y)              290.7122 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -44.09769659 +/-    0.0019
Ecliptic Y           -7.21709604 +/-    0.0003
Ecliptic Z           -0.21892301 +/-    0.0000
Ecliptic XDOT         0.00040231 +/-    0.0000
Ecliptic YDOT        -0.00251767 +/-    0.0000
Ecliptic ZDOT        -0.00002762 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.68491073 +/-    0.0019
Geocenter to KBO     43.68817784 +/-    0.0019
# Hcoef:  7.73

The following table shows the complete astrometric record for 00GX146. 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 (00GX146) followed by the observatory code and reference code for the source of the astrometry.

2000 04  03.36961  12 33 18.78   -03 54 20.7   23.9R 00GX146   568  Cb2885      
2000 04  03.40451  12 33 18.62   -03 54 19.5   23.9R 00GX146   568  Cb2885      
2000 04  03.44462  12 33 18.46   -03 54 18.4   23.9R 00GX146   568  Cb2885      
2000 04  04.47116  12 33 14.12   -03 53 50.6   24.0R 00GX146   568  Cb2885      
2000 04  04.52525  12 33 13.88   -03 53 49.1   24.2R 00GX146   568  Cb2885      
2000 04  05.46661  12 33 09.90   -03 53 23.5   24.1R 00GX146   568  Cb2885      
2000 04  05.51005  12 33 09.72   -03 53 22.4   24.1R 00GX146   568  Cb2885      
2000 05  07.28426  12 31 08.89   -03 40 26.5   24.3R 00GX146   568  Cb5789      
2000 05  07.33980  12 31 08.67   -03 40 25.8   24.0R 00GX146   568  Cb5789      
2001 02  17.53336  12 40 41.72   -04 42 06.6   23.6R 00GX146   568  Cc6646      
2001 02  17.58074  12 40 41.58   -04 42 05.6   23.9R 00GX146   568  Cc6646      
2001 02  18.52863  12 40 38.76   -04 41 48.2   23.6R 00GX146   568  Cc6646      
2001 03  24.36874  12 38 31.62   -04 28 29.2   23.4R 00GX146   695  Cc7846      
2001 03  24.45273  12 38 31.26   -04 28 26.7         00GX146   695  Cc7846      
2002 03  13.43568  12 43 47.46   -05 02 44.3         00GX146   696  Cf1719      
2002 03  13.47273  12 43 47.31   -05 02 43.5         00GX146   696  Cf1719      
2013 03  12.37741  13 33 51.34   -10 16 17.7   23.5R 00GX146   695  C~0uco      
2013 03  12.45157  13 33 51.08   -10 16 16.1         00GX146   695  C~0uco      
2013 03  13.37708  13 33 47.82   -10 15 57.6         00GX146   695  C~0uco      
2015 03  23.36370  13 42 27.07   -11 06 55.9   23.6R 00GX146   695  C~1Q39      
2015 03  23.42692  13 42 26.80   -11 06 54.5         00GX146   695  C~1Q39      

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    -0.01       0.00    -0.34
  2   0.0001     -2.67    -0.24       0.16    -0.15
  3   0.0002     -5.31    -0.06       0.23    -0.06
  4   0.0030    -75.96     0.12       0.22     0.05
  5   0.0032    -79.85     0.01       0.19     0.04
  6   0.0057   -144.68    -0.10       0.28     0.19
  7   0.0059   -147.59     0.02       0.23     0.16
  8   0.0929  -2115.58     0.27       1.03     0.40
  9   0.0930  -2118.88    -0.12       0.38    -0.24
 10   0.8766   7221.46     0.00     -35.42    -0.05
 11   0.8767   7219.14     0.00     -35.32     0.09
 12   0.8793   7173.48     0.13     -35.80    -0.04
 13   0.9719   5109.57 (   0.58)    -45.32 (   0.50)
 14   0.9722   5103.63 (   0.49)    -45.13 (   0.73)
 15   1.9413  10265.93 (  -0.40)    -89.76 (   1.03)
 16   1.9414  10263.55 (  -0.35)    -89.89 (   0.92)
 17  12.9391  60333.13     0.09    -632.64    -0.22
 18  12.9393  60328.62     0.09    -632.53    -0.07
 19  12.9418  60272.66    -0.24    -632.76     0.01
 20  14.9678  69328.31     0.20    -739.81     0.16
 21  14.9680  69323.62    -0.15    -739.92     0.08

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.

00GX146    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.866    43.893    43.839
ecceobj         0.019     0.019     0.019
incobj          0.681     0.681     0.681
qmin           42.514    42.557    42.468
qmax           45.951    45.953    45.970
amean          44.156    44.183    44.129
amin           43.814    43.846    43.796
amax           44.499    44.528    44.465
emean           0.019     0.018     0.019
emin            0.002     0.003     0.002
emax            0.033     0.033     0.034
imean           2.070     2.072     2.069
imin            1.400     1.406     1.396
imax            2.588     2.581     2.594
excite_mean     0.041     0.041     0.041
fracstop        1.000     1.000     1.000
cjmean          3.101     3.102     3.101

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       197.1     196.2     197.1
kozaiamp        180.0     180.0     180.0