Orbit Fit and Astrometric record for 181708

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: 181708    
# Created Mon Dec 18 02:36:38 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   69 observations of   70
# Arc:  14.94y
# First observation: 1993/03/28
#  Last observation: 2008/03/04
# Chi-squared of fit:   638.97 DOF:  132 RMS:  0.54
# Min/Max residuals:    -1.41    1.91
# Exact a, adot, b, bdot, g, gdot:
  1.459905E-05  2.371188E-02  2.352582E-06  3.226889E-03  2.429463E-02 -7.708868E-04
# 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
   -0.068940 -172.591054   -0.002846   -0.001138   -0.995574  2449074.917525
# Heliocentric elements and errors
Epoch:              2449074.5000  =  1993/03/28
Mean Anomaly:          323.91629 +/-     0.000
Argument of Peri:       39.34812 +/-     0.000
Long of Asc Node:      187.91446 +/-     0.000
Inclination:             7.73211 +/-     0.000
Eccentricity:         0.05285404 +/-    0.0000
Semi-Major Axis:     43.99333851 +/-    0.0000
Time of Perihelion: 2459757.3583 +/-       0.0
Perihelion:          41.66811280 +/-    0.0000
Aphelion:            46.31856421 +/-    0.0000
Period (y)              291.8022 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -41.80659730 +/-    0.0000
Ecliptic Y           -5.44443173 +/-    0.0000
Ecliptic Z           -0.04941853 +/-    0.0000
Ecliptic XDOT         0.00043262 +/-    0.0000
Ecliptic YDOT        -0.00264423 +/-    0.0000
Ecliptic ZDOT         0.00036369 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.15966811 +/-    0.0000
Geocenter to KBO     41.16141423 +/-    0.0000
# Hcoef:  7.02

The following table shows the complete astrometric record for 181708. 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 (181708) followed by the observatory code and reference code for the source of the astrometry.

1993 03  28.41684  12 27 06.31   -03 00 12.7   22.8R 181708    568  C22008      
1993 03  28.59830  12 27 05.52   -03 00 07.0         181708    568  C22008      
1993 03  29.41934  12 27 01.90   -02 59 42.2         181708    568  C22008      
1993 03  29.42846  12 27 01.85   -02 59 41.8         181708    568  C22008      
1993 05  17.03238  12 23 59.43   -02 38 27.7   23. V 181708    809  C22191      
1993 05  17.05998  12 23 59.36   -02 38 27.3         181708    809  C22191      
1993 05  17.09281  12 23 59.27   -02 38 26.7         181708    809  C22191      
1993 05  17.35082  12 23 58.68   -02 38 22.6         181708    568  C22539      
1993 05  17.39862  12 23 58.55   -02 38 22.0         181708    568  C22539      
1993 05  18.01676  12 23 56.96   -02 38 09.8         181708    809  C22191      
1993 06  25.05761  12 23 19.44   -02 32 50.2   23.8R 181708    809  C22560      
1994 01  11.36321  12 36 04.68   -03 48 20.2   23.5V 181708    809   23196      
1994 01  14.36192  12 36 03.81   -03 48 08.4   23.5R 181708    809   23197      
1994 02  14.63407  12 35 09.23   -03 41 14.5         181708    413  C23175      
1994 02  14.71091  12 35 09.00   -03 41 12.9         181708    413  C23175      
1994 05  05.94965  12 29 49.06   -03 04 20.7   23.5R 181708    493  C23817      
1994 05  10.89709  12 29 33.25   -03 02 30.3         181708    493  C23817      
1994 05  11.90694  12 29 30.24   -03 02 09.6   22.0R 181708    950  C23646      
1994 05  12.86471  12 29 27.37   -03 01 48.8         181708    493  C23817      
1995 02  26.34965  12 39 49.50   -03 58 38.3         181708    675  C25124      
1995 02  26.50035  12 39 48.92   -03 58 34.7         181708    675  C25125      
1995 04  01.0245   12 37 30.00   -03 42 37.2         181708    950  C25182      
1995 04  01.0841   12 37 29.79   -03 42 35.4         181708    950  C25182      
1995 04  01.1368   12 37 29.55   -03 42 34.3   23.1R 181708    950  C25029      
1996 01  20.39364  12 46 28.85   -04 30 29.3         181708    711  C27069      
1996 01  20.40265  12 46 28.82   -04 30 28.1         181708    711  C27069      
1996 01  20.43622  12 46 28.82   -04 30 30.3         181708    711  C27069      
1996 01  20.44570  12 46 28.80   -04 30 28.7         181708    711  C27069      
1996 01  20.50025  12 46 28.73   -04 30 28.3         181708    711  C27069      
1996 01  20.50935  12 46 28.70   -04 30 29.1         181708    711  C27069      
1996 01  20.51776  12 46 28.73   -04 30 28.9         181708    711  C27069      
1996 01  21.35080  12 46 28.22   -04 30 22.9         181708    711  C27069      
1996 01  21.35875  12 46 28.16   -04 30 22.2         181708    711  C27069      
1996 01  21.36674  12 46 28.29   -04 30 22.8         181708    711  C27069      
1996 01  21.44519  12 46 28.11   -04 30 22.4         181708    711  C27069      
1996 01  21.50688  12 46 27.97   -04 30 20.9         181708    711  C27069      
1996 01  21.51453  12 46 28.09   -04 30 20.9         181708    711  C27069      
1996 01  21.52438  12 46 27.98   -04 30 20.4         181708    711  C27069      
1996 01  22.40733  12 46 27.25   -04 30 15.2         181708    711  C27069      
1996 01  22.45210  12 46 27.28   -04 30 13.0         181708    711  C27069      
1996 01  22.46753  12 46 27.24   -04 30 13.8         181708    711  C27069      
1996 01  23.34553  12 46 26.53   -04 30 06.9         181708    711  C27069      
1996 01  23.35381  12 46 26.46   -04 30 06.4         181708    711  C27069      
1996 01  23.36175  12 46 26.41   -04 30 07.2         181708    711  C27069      
1996 01  23.36946  12 46 26.64   -04 30 06.4         181708    711  C27069      
1996 01  23.41638  12 46 26.42   -04 30 05.8         181708    711  C27069      
1996 01  23.42445  12 46 26.40   -04 30 05.6         181708    711  C27069      
1996 01  23.43247  12 46 26.42   -04 30 05.6         181708    711  C27069      
1996 01  23.44015  12 46 26.37   -04 30 06.1         181708    711  C27069      
1996 01  23.49394  12 46 26.35   -04 30 05.0         181708    711  C27069      
1996 01  23.50181  12 46 26.32   -04 30 05.1         181708    711  C27069      
1996 01  23.50970  12 46 26.31   -04 30 05.1         181708    711  C27069      
1996 01  23.51740  12 46 26.32   -04 30 05.6         181708    711  C27069      
1997 06  03.19959  12 44 24.88   -04 00 55.7         181708    711  C30029      
1997 06  03.21584  12 44 24.83   -04 00 56.1         181708    711  C30029      
1997 06  03.22380  12 44 24.83   -04 00 56.0         181708    711  C30029      
1997 06  03.26639  12 44 24.71   -04 00 55.7         181708    711  C30029      
1997 06  04.18217  12 44 23.24   -04 00 44.9         181708    711  C30029      
1997 06  04.25277  12 44 23.10   -04 00 43.9         181708    711  C30029      
1998 05  31.30588  12 49 46.89   -04 22 57.8   22.7R 181708    568  Ca1211      
1998 05  31.35794  12 49 46.77   -04 22 57.4         181708    568  Ca1211      
1998 05  31.38947  12 49 46.72   -04 22 56.8         181708    568  Ca1211      
2001 05  23.28898  13 06 01.42   -05 28 31.1         181708    568  Cd2096      
2001 05  23.32149  13 06 01.33   -05 28 30.5         181708    568  Cd2096      
2004 04  26.32065  13 23 51.89   -06 41 31.2   22.9g 181708    568  C~0VSq      
2004 04  26.34194  13 23 51.78   -06 41 30.7   23.2g 181708    568  C~0VSq      
2004 04  26.36827  13 23 51.66   -06 41 29.9   23.3g 181708    568  C~0VSq      
2008 03  04.36660  13 49 19.14   -08 25 31.0         181708    695  Cy7583      
2008 03  04.46166  13 49 18.88   -08 25 29.2         181708    695  Cy7583      
2008 03  05.42116  13 49 16.05   -08 25 08.6         181708    695  Cy7583      

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    -0.13       0.00     0.90
  2   0.0005      0.00     0.58       0.00     0.03
  3   0.0027      0.00     0.58       0.00    -0.19
  4   0.0028      0.00     0.45       0.00    -0.07
  5   0.1358      0.00    -0.52       0.00     0.19
  6   0.1359      0.00    -0.49       0.00     0.08
  7   0.1360      0.00    -0.55       0.00     0.08
  8   0.1367      0.00     0.41       0.00    -0.37
  9   0.1368      0.00     0.31       0.00    -0.65
 10   0.1385      0.00    -0.60       0.00     0.19
 11   0.2427      0.00     0.41       0.00     1.07
 12   0.7911      0.00     0.20       0.00     0.33
 13   0.7993      0.00     0.26       0.00     0.33
 14   0.8849      0.00     0.33       0.00    -0.02
 15   0.8851      0.00     0.36       0.00    -0.03
 16   1.1048      0.00    -0.19       0.00     0.96
 17   1.1184      0.00     0.01       0.00     0.53
 18   1.1211      0.00     0.58       0.00    -0.25
 19   1.1237      0.00     0.05       0.00     0.60
 20   1.9163      0.00     0.51       0.00     0.69
 21   1.9167      0.00    -0.01       0.00     0.55
 22   2.0085      0.00     0.11       0.00     0.56
 23   2.0087      0.00     1.00       0.00     0.55
 24   2.0088      0.00     0.97       0.00     0.05
 25   2.8144      0.00    -0.11       0.00    -0.12
 26   2.8145      0.00    -0.46       0.00     1.02
 27   2.8146      0.00    -0.08       0.00    -1.41
 28   2.8146      0.00    -0.28       0.00     0.13
 29   2.8147      0.00    -0.71       0.00     0.15
 30   2.8148      0.00    -1.06       0.00    -0.71
 31   2.8148      0.00    -0.51       0.00    -0.57
 32   2.8171      0.00     0.67       0.00    -0.58
 33   2.8171      0.00    -0.13       0.00     0.07
 34   2.8171      0.00     1.91       0.00    -0.59
 35   2.8173      0.00     0.19       0.00    -0.78
 36   2.8175      0.00    -1.13       0.00     0.26
 37   2.8175      0.00     0.77       0.00     0.20
 38   2.8175      0.00    -0.76       0.00     0.63
 39   2.8200      0.00    -1.07       0.00    -1.04
 40   2.8201      0.00    -0.00       0.00     0.80
 41   2.8201      0.00    -0.39       0.00    -0.12
 42   2.8225      0.00     0.65       0.00    -0.52
 43   2.8226      0.00    -0.28       0.00    -0.09
 44   2.8226      0.00    -0.91       0.00    -0.96
 45   2.8226      0.00 (   2.66)      0.00 (  -0.23)
 46   2.8227      0.00     0.06       0.00    -0.03
 47   2.8227      0.00    -0.12       0.00     0.10
 48   2.8228      0.00     0.31       0.00     0.04
 49   2.8228      0.00    -0.33       0.00    -0.53
 50   2.8229      0.00     0.20       0.00     0.11
 51   2.8230      0.00    -0.13       0.00    -0.06
 52   2.8230      0.00    -0.16       0.00    -0.13
 53   2.8230      0.00     0.11       0.00    -0.70
 54   4.1828      0.00    -0.13       0.00     0.13
 55   4.1829      0.00    -0.44       0.00    -0.47
 56   4.1829      0.00    -0.23       0.00    -0.46
 57   4.1830      0.00    -0.90       0.00    -0.67
 58   4.1855      0.00     0.02       0.00    -0.52
 59   4.1857      0.00    -0.28       0.00    -0.32
 60   5.1742      0.00     0.05       0.00     0.12
 61   5.1744      0.00    -0.08       0.00    -0.20
 62   5.1745      0.00     0.18       0.00    -0.04
 63   8.1530      0.00     0.27       0.00     0.60
 64   8.1531      0.00     0.39       0.00     0.60
 65  11.0798      0.00     0.94       0.00     0.64
 66  11.0799      0.00     0.70       0.00     0.57
 67  11.0799      0.00     0.65       0.00     0.65
 68  14.9348      0.00    -0.52       0.00    -0.22
 69  14.9351      0.00    -0.16       0.00    -0.43
 70  14.9377      0.00    -0.25       0.00    -0.38

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.

181708    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.468    43.468    43.468
ecceobj         0.043     0.043     0.043
incobj          7.775     7.775     7.775
qmin           41.104    41.112    41.101
qmax           46.579    46.569    46.582
amean          43.777    43.777    43.777
amin           43.429    43.428    43.433
amax           44.130    44.124    44.131
emean           0.043     0.043     0.043
emin            0.029     0.029     0.029
emax            0.056     0.056     0.056
imean           8.134     8.134     8.134
imin            7.575     7.574     7.571
imax            8.735     8.736     8.734
excite_mean     0.148     0.148     0.148
fracstop        1.000     1.000     1.000
cjmean          3.073     3.073     3.073

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       183.1     182.9     183.1
kozaiamp        179.9     180.0     180.0