Orbit Fit and Astrometric record for 488644

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: 488644    
# Created Fri Dec 15 02:36:50 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   80 observations of   80
# Arc:  14.00y
# First observation: 2003/04/26
#  Last observation: 2017/04/25
# Chi-squared of fit:    84.48 DOF:  154 RMS:  0.18
# Min/Max residuals:    -0.51    0.98
# Exact a, adot, b, bdot, g, gdot:
  1.455649E-05  2.325000E-02 -4.559089E-06 -9.860857E-04  2.409662E-02 -1.033017E-03
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.857116 -163.787255   -0.339384    0.014181   -0.948003  2452755.827443
# Heliocentric elements and errors
Epoch:              2452756.5000  =  2003/04/27
Mean Anomaly:          283.50486 +/-     0.000
Argument of Peri:      241.33905 +/-     0.000
Long of Asc Node:       35.66881 +/-     0.000
Inclination:             2.57105 +/-     0.000
Eccentricity:         0.03434572 +/-    0.0000
Semi-Major Axis:     42.74434014 +/-    0.0000
Time of Perihelion: 2474445.9091 +/-       0.0
Perihelion:          41.27625495 +/-    0.0000
Aphelion:            44.21242534 +/-    0.0000
Period (y)              279.4642 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -40.66237165 +/-    0.0000
Ecliptic Y          -12.17250804 +/-    0.0000
Ecliptic Z            0.62062010 +/-    0.0000
Ecliptic XDOT         0.00084248 +/-    0.0000
Ecliptic YDOT        -0.00250923 +/-    0.0000
Ecliptic ZDOT        -0.00011359 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.44979856 +/-    0.0000
Geocenter to KBO     41.49966186 +/-    0.0000
# Hcoef:  7.92

The following table shows the complete astrometric record for 488644. 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 (488644) followed by the observatory code and reference code for the source of the astrometry.

2003 04  26.32670  13 01 04.36   -05 35 06.4   22.8R 488644    568  Cq9882      
2003 04  26.36890  13 01 04.16   -05 35 05.8   22.8R 488644    568  Cq9882      
2003 04  26.41129  13 01 03.97   -05 35 04.7   23.1R 488644    568  Cq9882      
2003 04  27.37821  13 00 59.96   -05 34 40.2   23.0R 488644    568  Cq9882      
2003 05  30.28577  12 59 08.35   -05 23 53.0         488644    568  Cq9882      
2003 05  30.33903  12 59 08.20   -05 23 52.5         488644    568  Cq9882      
2003 05  30.38582  12 59 08.08   -05 23 51.8         488644    568  Cq9882      
2004 03  29.52117  13 07 56.83   -06 20 54.6         488644    568  Cq9882      
2004 03  29.54418  13 07 56.70   -06 20 54.2         488644    568  Cq9882      
2004 03  29.57266  13 07 56.57   -06 20 53.3         488644    568  Cq9882      
2004 04  15.31956  13 06 41.53   -06 13 21.9         488644    675  Cq9882      
2004 04  16.27519  13 06 37.32   -06 12 56.7         488644    675  Cq9882      
2004 04  16.34717  13 06 37.01   -06 12 54.8         488644    675  Cq9882      
2004 04  16.39565  13 06 36.79   -06 12 53.4         488644    675  Cq9882      
2005 07  09.19050  13 08 08.16   -06 27 54.0         488644    675  Cq9882      
2005 07  11.19212  13 08 09.63   -06 28 06.7         488644    675  Cq9882      
2007 07  11.96153  13 17 46.80   -07 33 53.1         488644    304  Cv1984      
2007 07  12.05102  13 17 46.86   -07 33 53.5         488644    304  Cv1984      
2015 04  24.23980  14 01 07.84   -12 10 32.2   23.4R 488644    G37  C~1ReC      
2015 04  24.40910  14 01 07.03   -12 10 28.2         488644    G37  C~1ReC      
2017 04  24.43355  14 11 26.71   -13 12 43.7   24.3r 488644    568  C~2F7n      
2017 04  24.43460  14 11 26.72   -13 12 43.6   24.0r 488644    568  C~2F7n      
2017 04  24.43565  14 11 26.71   -13 12 43.6   23.8r 488644    568  C~2F7n      
2017 04  24.43670  14 11 26.70   -13 12 43.5   24.3r 488644    568  C~2F7n      
2017 04  24.43775  14 11 26.70   -13 12 43.5   23.6r 488644    568  C~2F7n      
2017 04  24.43879  14 11 26.69   -13 12 43.5   24.1r 488644    568  C~2F7n      
2017 04  24.44116  14 11 26.68   -13 12 43.5   24.3r 488644    568  C~2F7n      
2017 04  24.44221  14 11 26.67   -13 12 43.4   23.7r 488644    568  C~2F7n      
2017 04  24.44326  14 11 26.67   -13 12 43.4   23.7r 488644    568  C~2F7n      
2017 04  24.44535  14 11 26.65   -13 12 43.4   24.0r 488644    568  C~2F7n      
2017 04  24.44850  14 11 26.64   -13 12 43.2   23.7r 488644    568  C~2F7n      
2017 04  24.44955  14 11 26.63   -13 12 43.2   24.1r 488644    568  C~2F7n      
2017 04  24.45059  14 11 26.63   -13 12 43.2   23.9r 488644    568  C~2F7n      
2017 04  24.45164  14 11 26.62   -13 12 43.1   24.4r 488644    568  C~2F7n      
2017 04  24.45269  14 11 26.62   -13 12 43.1   23.9r 488644    568  C~2F7n      
2017 04  24.45504  14 11 26.61   -13 12 43.1   24.0r 488644    568  C~2F7n      
2017 04  24.45609  14 11 26.60   -13 12 43.1   24.0r 488644    568  C~2F7n      
2017 04  24.45714  14 11 26.60   -13 12 43.0   23.4r 488644    568  C~2F7n      
2017 04  24.45819  14 11 26.60   -13 12 43.0   23.8r 488644    568  C~2F7n      
2017 04  24.45924  14 11 26.59   -13 12 43.0   23.6r 488644    568  C~2F7n      
2017 04  24.46029  14 11 26.59   -13 12 42.9   23.8r 488644    568  C~2F7n      
2017 04  24.55484  14 11 26.13   -13 12 40.7   24.1r 488644    568  C~2F7n      
2017 04  24.55697  14 11 26.12   -13 12 40.6   23.8r 488644    568  C~2F7n      
2017 04  24.55907  14 11 26.12   -13 12 40.8   23.9r 488644    568  C~2F7n      
2017 04  24.56326  14 11 26.10   -13 12 40.6   23.6r 488644    568  C~2F7n      
2017 04  24.56430  14 11 26.10   -13 12 40.4   23.6r 488644    568  C~2F7n      
2017 04  24.56536  14 11 26.08   -13 12 40.5   23.6r 488644    568  C~2F7n      
2017 04  24.56641  14 11 26.09   -13 12 40.3   23.8r 488644    568  C~2F7n      
2017 04  24.56746  14 11 26.07   -13 12 40.4   23.4r 488644    568  C~2F7n      
2017 04  24.57110  14 11 26.06   -13 12 40.4   23.9r 488644    568  C~2F7n      
2017 04  24.57320  14 11 26.04   -13 12 40.2   24.2r 488644    568  C~2F7n      
2017 04  24.57529  14 11 26.04   -13 12 40.1   23.6r 488644    568  C~2F7n      
2017 04  24.57638  14 11 26.04   -13 12 40.2   23.7r 488644    568  C~2F7n      
2017 04  24.57743  14 11 26.03   -13 12 40.1   23.6r 488644    568  C~2F7n      
2017 04  24.57847  14 11 26.01   -13 12 40.3   24.1r 488644    568  C~2F7n      
2017 04  25.34061  14 11 22.46   -13 12 22.3   23.3r 488644    568  C~2F7n      
2017 04  25.34166  14 11 22.45   -13 12 22.1   23.4r 488644    568  C~2F7n      
2017 04  25.34270  14 11 22.46   -13 12 22.2   23.8r 488644    568  C~2F7n      
2017 04  25.34375  14 11 22.44   -13 12 22.4   24.0r 488644    568  C~2F7n      
2017 04  25.34480  14 11 22.44   -13 12 22.1   23.8r 488644    568  C~2F7n      
2017 04  25.34612  14 11 22.42   -13 12 22.0   24.1r 488644    568  C~2F7n      
2017 04  25.34717  14 11 22.43   -13 12 22.1   23.5r 488644    568  C~2F7n      
2017 04  25.36212  14 11 22.36   -13 12 21.9   23.8r 488644    568  C~2F7n      
2017 04  25.36316  14 11 22.36   -13 12 21.6   23.9r 488644    568  C~2F7n      
2017 04  25.36421  14 11 22.35   -13 12 21.6   24.3r 488644    568  C~2F7n      
2017 04  25.36527  14 11 22.35   -13 12 21.6   24.1r 488644    568  C~2F7n      
2017 04  25.36631  14 11 22.34   -13 12 21.4   24.3r 488644    568  C~2F7n      
2017 04  25.36736  14 11 22.34   -13 12 21.5   24.5r 488644    568  C~2F7n      
2017 04  25.36841  14 11 22.33   -13 12 21.5   24.9r 488644    568  C~2F7n      
2017 04  25.36946  14 11 22.33   -13 12 21.5   24.5r 488644    568  C~2F7n      
2017 04  25.37050  14 11 22.32   -13 12 21.5   24.5r 488644    568  C~2F7n      
2017 04  25.37182  14 11 22.31   -13 12 21.4   24.6r 488644    568  C~2F7n      
2017 04  25.37392  14 11 22.30   -13 12 21.4   24.1r 488644    568  C~2F7n      
2017 04  25.37497  14 11 22.29   -13 12 21.5   23.9r 488644    568  C~2F7n      
2017 04  25.37706  14 11 22.28   -13 12 21.3   24.1r 488644    568  C~2F7n      
2017 04  25.37811  14 11 22.28   -13 12 21.2   24.3r 488644    568  C~2F7n      
2017 04  25.37916  14 11 22.27   -13 12 21.2   24.0r 488644    568  C~2F7n      
2017 04  25.38021  14 11 22.24   -13 12 21.1   24.1r 488644    568  C~2F7n      
2017 04  25.38444  14 11 22.24   -13 12 21.2   23.9r 488644    568  C~2F7n      
2017 04  25.38549  14 11 22.24   -13 12 21.2   24.1r 488644    568  C~2F7n      

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    -0.20       0.00     0.98
  2   0.0001      0.00     0.20       0.00     0.22
  3   0.0002      0.00     0.07       0.00     0.26
  4   0.0029      0.00     0.49       0.00     0.71
  5   0.0930      0.00     0.08       0.00     0.05
  6   0.0931      0.00    -0.19       0.00    -0.16
  7   0.0932      0.00    -0.25       0.00    -0.08
  8   0.9259      0.00     0.09       0.00    -0.29
  9   0.9260      0.00    -0.30       0.00    -0.51
 10   0.9261      0.00    -0.33       0.00    -0.38
 11   0.9719      0.00    -0.51       0.00     0.05
 12   0.9745      0.00     0.08       0.00    -0.14
 13   0.9747      0.00     0.30       0.00    -0.15
 14   0.9749      0.00     0.28       0.00    -0.04
 15   2.2036      0.00     0.46       0.00    -0.21
 16   2.2091      0.00    -0.02       0.00    -0.27
 17   4.2098      0.00    -0.40       0.00    -0.13
 18   4.2101      0.00    -0.26       0.00    -0.05
 19  11.9943      0.00     0.28       0.00     0.15
 20  11.9947      0.00     0.15       0.00     0.02
 21  13.9962      0.00    -0.02       0.00    -0.08
 22  13.9962      0.00     0.21       0.00    -0.00
 23  13.9962      0.00     0.13       0.00    -0.03
 24  13.9962      0.00     0.06       0.00     0.05
 25  13.9962      0.00     0.13       0.00     0.02
 26  13.9962      0.00     0.06       0.00    -0.00
 27  13.9962      0.00     0.08       0.00    -0.06
 28  13.9962      0.00     0.00       0.00     0.02
 29  13.9962      0.00     0.08       0.00    -0.01
 30  13.9962      0.00    -0.07       0.00    -0.06
 31  13.9962      0.00     0.00       0.00     0.07
 32  13.9962      0.00    -0.07       0.00     0.04
 33  13.9962      0.00     0.00       0.00     0.02
 34  13.9962      0.00    -0.07       0.00     0.09
 35  13.9962      0.00     0.00       0.00     0.07
 36  13.9962      0.00     0.02       0.00     0.01
 37  13.9962      0.00    -0.05       0.00    -0.01
 38  13.9963      0.00     0.02       0.00     0.06
 39  13.9963      0.00     0.10       0.00     0.04
 40  13.9963      0.00     0.02       0.00     0.01
 41  13.9963      0.00     0.10       0.00     0.09
 42  13.9965      0.00    -0.03       0.00     0.04
 43  13.9965      0.00    -0.02       0.00     0.09
 44  13.9965      0.00     0.13       0.00    -0.17
 45  13.9965      0.00     0.13       0.00    -0.07
 46  13.9965      0.00     0.20       0.00     0.11
 47  13.9965      0.00    -0.02       0.00    -0.02
 48  13.9965      0.00     0.20       0.00     0.16
 49  13.9966      0.00    -0.02       0.00     0.03
 50  13.9966      0.00     0.09       0.00    -0.05
 51  13.9966      0.00    -0.07       0.00     0.10
 52  13.9966      0.00     0.08       0.00     0.15
 53  13.9966      0.00     0.16       0.00     0.02
 54  13.9966      0.00     0.09       0.00     0.10
 55  13.9966      0.00    -0.14       0.00    -0.13
 56  13.9987      0.00     0.07       0.00    -0.17
 57  13.9987      0.00    -0.00       0.00     0.00
 58  13.9987      0.00     0.22       0.00    -0.12
 59  13.9987      0.00    -0.00       0.00    -0.35
 60  13.9987      0.00     0.07       0.00    -0.07
 61  13.9987      0.00    -0.13       0.00    -0.00
 62  13.9987      0.00     0.09       0.00    -0.13
 63  13.9987      0.00     0.11       0.00    -0.28
 64  13.9987      0.00     0.19       0.00    -0.00
 65  13.9987      0.00     0.11       0.00    -0.03
 66  13.9987      0.00     0.19       0.00    -0.05
 67  13.9987      0.00     0.11       0.00     0.12
 68  13.9987      0.00     0.19       0.00    -0.00
 69  13.9987      0.00     0.11       0.00    -0.03
 70  13.9987      0.00     0.19       0.00    -0.05
 71  13.9988      0.00     0.11       0.00    -0.08
 72  13.9988      0.00     0.06       0.00    -0.01
 73  13.9988      0.00     0.06       0.00    -0.06
 74  13.9988      0.00    -0.01       0.00    -0.18
 75  13.9988      0.00    -0.01       0.00    -0.03
 76  13.9988      0.00     0.06       0.00     0.04
 77  13.9988      0.00    -0.01       0.00     0.02
 78  13.9988      0.00    -0.39       0.00     0.09
 79  13.9988      0.00    -0.09       0.00    -0.11
 80  13.9988      0.00    -0.01       0.00    -0.13

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.

488644    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.365    42.365    42.365
ecceobj         0.036     0.036     0.036
incobj          2.582     2.582     2.582
qmin           40.496    40.491    40.502
qmax           45.004    45.011    44.999
amean          42.656    42.656    42.656
amin           42.332    42.330    42.333
amax           42.988    42.993    42.989
emean           0.029     0.029     0.029
emin            0.005     0.005     0.005
emax            0.047     0.047     0.047
imean           1.885     1.885     1.885
imin            0.560     0.560     0.560
imax            2.745     2.745     2.745
excite_mean     0.044     0.044     0.044
fracstop        1.000     1.000     1.000
cjmean          3.083     3.083     3.083

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       185.9     185.9     185.9
kozaiamp        179.9     180.0     180.0