Orbit Fit and Astrometric record for 79983

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: 79983     
# Created Tue Oct 17 01:36:24 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   66 observations of   66
# Arc:  17.06y
# First observation: 1999/02/20
#  Last observation: 2016/03/13
# Chi-squared of fit:    99.21 DOF:  126 RMS:  0.22
# Min/Max residuals:    -0.76    1.14
# Exact a, adot, b, bdot, g, gdot:
  1.572714E-05  2.707478E-02 -3.363352E-06 -4.677889E-03  2.578580E-02 -1.596558E-05
# 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
    0.576444  151.609408    0.002760    0.009781   -0.995893  2451229.799883
# Heliocentric elements and errors
Epoch:              2451230.5000  =  1999/02/21
Mean Anomaly:            0.46887 +/-     0.000
Argument of Peri:      176.08845 +/-     0.000
Long of Asc Node:      334.84111 +/-     0.000
Inclination:             9.84303 +/-     0.000
Eccentricity:         0.13838745 +/-    0.0000
Semi-Major Axis:     46.15698637 +/-    0.0000
Time of Perihelion: 2451081.3208 +/-       0.0
Perihelion:          39.76943886 +/-    0.0000
Aphelion:            52.54453389 +/-    0.0000
Period (y)              313.5916 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -34.98184489 +/-    0.0000
Ecliptic Y           18.91426334 +/-    0.0000
Ecliptic Z            0.39004983 +/-    0.0000
Ecliptic XDOT        -0.00137158 +/-    0.0000
Ecliptic YDOT        -0.00251841 +/-    0.0000
Ecliptic ZDOT        -0.00049667 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.76972341 +/-    0.0000
Geocenter to KBO     38.78107255 +/-    0.0000
# Hcoef:  5.93

The following table shows the complete astrometric record for 79983. 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 (79983) followed by the observatory code and reference code for the source of the astrometry.

1999 02  20.29914  10 15 20.02   +11 26 27.0   21.5R 79983     695  Cb7529      
1999 02  20.34947  10 15 19.74   +11 26 27.8   21.5R 79983     695  Cb7529      
1999 02  20.39919  10 15 19.49   +11 26 29.4   21.5R 79983     695  Cb7529      
1999 04  12.37862  10 11 44.10   +11 43 50.9   21.0R 79983     568  Cb7529      
1999 04  12.41296  10 11 44.01   +11 43 51.1   21.0R 79983     568  Cb7529      
1999 05  06.36492  10 11 01.78   +11 46 20.6   21.9R 79983     568  Cb7529      
1999 05  07.23740  10 11 01.23   +11 46 20.6   21.9R 79983     568  Cb7529      
2000 05  06.27118  10 16 26.30   +10 59 08.5   22.1R 79983     568  Cb7529      
2000 05  06.33998  10 16 26.25   +10 59 08.4   22.1R 79983     568  Cb7529      
2000 05  07.24338  10 16 25.62   +10 59 09.0   22.1R 79983     568  Cb7529      
2000 05  07.29106  10 16 25.58   +10 59 09.1   22.0R 79983     568  Cb7529      
2001 02  14.99821  10 26 41.76   +09 47 16.4         79983     950  Cc6424      
2001 02  15.01328  10 26 41.69   +09 47 16.5   22.7R 79983     950  Cc6424      
2001 02  15.03609  10 26 41.57   +09 47 17.2         79983     950  Cc6424      
2001 02  21.19598  10 26 11.44   +09 49 54.8   21.3R 79983     688  Cc6424      
2001 02  21.24398  10 26 11.17   +09 49 56.0         79983     688  Cc6424      
2004 03  22.26853  10 40 10.32   +07 34 18.5   22.4R 79983     662  Ck1971      
2004 03  22.32369  10 40 10.06   +07 34 19.3         79983     662  Ck1971      
2011 03  30.36699  11 16 46.007  +01 47 46.81  22.1w 79983     F51  C~1vlj      
2011 03  30.38030  11 16 45.949  +01 47 47.07  22.3w 79983     F51  C~1vlj      
2011 03  30.39475  11 16 45.883  +01 47 47.39  22.1w 79983     F51  C~1vlj      
2011 03  30.40803  11 16 45.827  +01 47 47.84  21.7w 79983     F51  C~1vlj      
2011 12  06.62930  11 27 17.846  +00 33 46.63  21.9w 79983     F51  C~1vlj      
2011 12  06.63395  11 27 17.845  +00 33 46.39  22.0w 79983     F51  C~1vlj      
2011 12  06.63860  11 27 17.854  +00 33 46.38  21.9w 79983     F51  C~1vlj      
2011 12  06.64324  11 27 17.862  +00 33 46.43  22.0w 79983     F51  C~1vlj      
2012 03  20.36416  11 22 41.605  +00 53 31.44  21.8w 79983     F51  C~1vlj      
2012 03  20.37878  11 22 41.528  +00 53 31.82  21.8w 79983     F51  C~1vlj      
2012 03  20.39342  11 22 41.452  +00 53 32.19  21.5w 79983     F51  C~1vlj      
2012 03  20.40804  11 22 41.399  +00 53 32.58  21.4w 79983     F51  C~1vlj      
2012 03  29.24441  11 22 01.100  +00 57 36.23  21.8R 79983     688              
2012 03  29.29391  11 22 00.868  +00 57 37.41        79983     688              
2013 03  06.41366  11 29 01.818  -00 03 01.57  22.1w 79983     F51  C~1vlj      
2013 03  06.42827  11 29 01.759  -00 03 01.23  21.8w 79983     F51  C~1vlj      
2013 03  06.44290  11 29 01.683  -00 03 01.03  21.8w 79983     F51  C~1vlj      
2013 03  06.45752  11 29 01.626  -00 03 00.55  21.7w 79983     F51  C~1vlj      
2013 04  05.33113  11 26 44.367  +00 10 42.54  22.0w 79983     F51  C~1vlj      
2013 04  05.34550  11 26 44.335  +00 10 42.96  22.1w 79983     F51  C~1vlj      
2013 04  05.35988  11 26 44.264  +00 10 43.41  22.3w 79983     F51  C~1vlj      
2013 04  05.37430  11 26 44.173  +00 10 43.97  22.1w 79983     F51  C~1vlj      
2014 02  28.45388  11 34 43.253  -00 55 38.16  22.1w 79983     F51  C~1vlj      
2014 02  28.46595  11 34 43.201  -00 55 37.83  22.1w 79983     F51  C~1vlj      
2014 02  28.47802  11 34 43.146  -00 55 37.62  21.6w 79983     F51  C~1vlj      
2014 02  28.49011  11 34 43.090  -00 55 37.26  21.9w 79983     F51  C~1vlj      
2014 03  24.40194  11 32 51.202  -00 44 46.23  21.8w 79983     F51  C~1vlj      
2014 03  24.41424  11 32 51.145  -00 44 45.75  21.9w 79983     F51  C~1vlj      
2014 03  24.42652  11 32 51.078  -00 44 45.35  21.9w 79983     F51  C~1vlj      
2014 03  24.43884  11 32 51.032  -00 44 45.30  21.9w 79983     F51  C~1vlj      
2014 05  24.26610  11 29 39.716  -00 23 22.93  22.1w 79983     F51  C~1vlj      
2014 05  24.27938  11 29 39.695  -00 23 22.75  22.0w 79983     F51  C~1vlj      
2014 05  24.29264  11 29 39.693  -00 23 22.65  22.3w 79983     F51  C~1vlj      
2014 05  24.30592  11 29 39.680  -00 23 22.71  22.4w 79983     F51  C~1vlj      
2014 11  29.61010  11 42 13.632  -01 49 05.12  22.0w 79983     F51  C~1vlj      
2014 11  29.61472  11 42 13.642  -01 49 04.70  22.1w 79983     F51  C~1vlj      
2014 11  29.61935  11 42 13.628  -01 49 04.83  21.9w 79983     F51  C~1vlj      
2014 11  29.62397  11 42 13.672  -01 49 05.00  22.2w 79983     F51  C~1vlj      
2015 01  25.48471  11 42 03.863  -01 55 48.87  22.4w 79983     F51  C~1vlj      
2015 01  25.49608  11 42 03.831  -01 55 48.73  22.2w 79983     F51  C~1vlj      
2015 01  25.50743  11 42 03.818  -01 55 48.74  22.4w 79983     F51  C~1vlj      
2015 01  25.51882  11 42 03.777  -01 55 48.33  22.4w 79983     F51  C~1vlj      
2015 03  22.39990  11 38 14.129  -01 35 38.66  22.1w 79983     F51  C~1vlj      
2015 03  22.41377  11 38 14.052  -01 35 38.36  21.8w 79983     F51  C~1vlj      
2015 03  22.42761  11 38 13.988  -01 35 38.03  21.9w 79983     F51  C~1vlj      
2015 03  22.44143  11 38 13.920  -01 35 37.71  21.7w 79983     F51  C~1vlj      
2016 03  13.24473  11 44 05.66   -02 29 12.4   21.3R 79983     G37  C~1pjt      
2016 03  13.29337  11 44 05.43   -02 29 11.2         79983     G37  C~1pjt      

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     1.14
  2   0.0001      0.00    -0.12       0.00    -0.45
  3   0.0003      0.00    -0.10       0.00    -0.10
  4   0.1398      0.00    -0.18       0.00    -0.00
  5   0.1399      0.00    -0.06       0.00    -0.21
  6   0.2055      0.00    -0.14       0.00    -0.28
  7   0.2079      0.00    -0.12       0.00    -0.28
  8   1.2073      0.00     0.09       0.00     0.15
  9   1.2075      0.00     0.20       0.00    -0.02
 10   1.2100      0.00     0.16       0.00    -0.15
 11   1.2101      0.00     0.10       0.00    -0.07
 12   1.9869      0.00    -0.08       0.00     0.42
 13   1.9869      0.00    -0.02       0.00     0.14
 14   1.9870      0.00    -0.13       0.00     0.26
 15   2.0038      0.00     0.32       0.00     0.50
 16   2.0040      0.00    -0.14       0.00     0.46
 17   5.0841      0.00     0.55       0.00    -0.24
 18   5.0843      0.00     0.34       0.00    -0.76
 19  12.1042      0.00     0.19       0.00     0.28
 20  12.1043      0.00     0.21       0.00     0.18
 21  12.1043      0.00     0.19       0.00     0.12
 22  12.1043      0.00     0.24       0.00     0.21
 23  12.7921      0.00    -0.06       0.00     0.03
 24  12.7922      0.00    -0.17       0.00    -0.13
 25  12.7922      0.00    -0.13       0.00    -0.06
 26  12.7922      0.00    -0.11       0.00     0.07
 27  13.0789      0.00     0.07       0.00     0.22
 28  13.0789      0.00    -0.04       0.00     0.19
 29  13.0790      0.00    -0.14       0.00     0.15
 30  13.0790      0.00     0.11       0.00     0.13
 31  13.1032      0.00     0.08       0.00     0.18
 32  13.1033      0.00    -0.05       0.00     0.01
 33  14.0400      0.00     0.00       0.00     0.12
 34  14.0401      0.00     0.17       0.00     0.06
 35  14.0401      0.00     0.08       0.00    -0.13
 36  14.0401      0.00     0.28       0.00    -0.04
 37  14.1219      0.00    -0.04       0.00    -0.18
 38  14.1220      0.00     0.41       0.00    -0.14
 39  14.1220      0.00     0.28       0.00    -0.07
 40  14.1220      0.00    -0.16       0.00     0.11
 41  15.0230      0.00    -0.26       0.00    -0.07
 42  15.0230      0.00    -0.20       0.00    -0.04
 43  15.0231      0.00    -0.18       0.00    -0.14
 44  15.0231      0.00    -0.18       0.00    -0.09
 45  15.0886      0.00     0.04       0.00    -0.15
 46  15.0886      0.00     0.05       0.00    -0.02
 47  15.0886      0.00    -0.09       0.00     0.04
 48  15.0887      0.00     0.09       0.00    -0.26
 49  15.2552      0.00    -0.10       0.00     0.12
 50  15.2553      0.00    -0.21       0.00     0.18
 51  15.2553      0.00    -0.03       0.00     0.16
 52  15.2553      0.00    -0.02       0.00    -0.01
 53  15.7736      0.00     0.18       0.00    -0.52
 54  15.7736      0.00     0.16       0.00     0.01
 55  15.7736      0.00    -0.22       0.00    -0.01
 56  15.7736      0.00     0.28       0.00    -0.07
 57  15.9293      0.00    -0.07       0.00    -0.13
 58  15.9294      0.00    -0.08       0.00    -0.10
 59  15.9294      0.00     0.20       0.00    -0.23
 60  15.9294      0.00     0.06       0.00     0.07
 61  16.0824      0.00     0.19       0.00     0.05
 62  16.0824      0.00     0.02       0.00    -0.04
 63  16.0825      0.00     0.05       0.00    -0.10
 64  16.0825      0.00     0.02       0.00    -0.17
 65  17.0594      0.00     0.08       0.00     0.15
 66  17.0595      0.00     0.12       0.00     0.02

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.

79983    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.282    46.282    46.282
ecceobj         0.141     0.141     0.141
incobj          9.831     9.831     9.831
qmin           38.986    38.982    38.990
qmax           54.318    54.302    54.311
amean          46.452    46.450    46.455
amin           46.063    46.048    46.061
amax           46.895    46.892    46.918
emean           0.145     0.145     0.145
emin            0.133     0.133     0.133
emax            0.159     0.158     0.158
imean          10.672    10.672    10.672
imin           10.304    10.297    10.304
imax           11.017    11.017    11.015
excite_mean     0.235     0.235     0.236
fracstop        1.000     1.000     1.000
cjmean          3.063     3.063     3.063

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       189.3     189.2     189.2
kozaiamp        180.0     180.0     179.9