Orbit Fit and Astrometric record for 00WT169

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: 00WT169   
# Created Mon Dec 18 02:37:04 2017
# Orbit generated from Bernstein formalism
# Fitting   39 observations of   39
# Arc:   9.18y
# First observation: 2000/11/23
#  Last observation: 2010/01/27
Preliminary a, adot, b, bdot, g, gdot:
  -0.000080   0.021328  -0.000003   0.000481   0.022667   0.000000
# Chi-squared of fit:   194.68 DOF:   72 RMS:  0.39
# Min/Max residuals:    -1.29    0.73
# Exact a, adot, b, bdot, g, gdot:
  1.647750E-05  2.136926E-02  3.652156E-06  4.823934E-04  2.277638E-02  2.950691E-04
# Covariance matrix:
  1.1998E-13 -3.2143E-14  3.6383E-17 -5.5105E-16  4.4054E-14 -1.1888E-13
 -3.2143E-14  6.1370E-14 -1.1320E-15  1.4730E-15  3.3661E-14  3.2378E-13
  3.6383E-17 -1.1320E-15  8.1048E-14 -1.0703E-14 -1.3326E-15 -6.2351E-15
 -5.5105E-16  1.4730E-15 -1.0703E-14  2.6813E-15  8.2158E-16  8.1216E-15
  4.4054E-14  3.3661E-14 -1.3326E-15  8.2158E-16  1.2139E-13  1.8465E-13
 -1.1888E-13  3.2378E-13 -6.2351E-15  8.1216E-15  1.8465E-13  1.7851E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.199993   68.368863    0.116004   -0.020552   -0.973776  2451871.955873
# Heliocentric elements and errors
Epoch:              2451870.5000  =  2000/11/22
Mean Anomaly:           52.88388 +/-     0.179
Argument of Peri:      263.46777 +/-     0.187
Long of Asc Node:      110.51587 +/-     0.003
Inclination:             1.74356 +/-     0.000
Eccentricity:         0.01442554 +/-    0.0001
Semi-Major Axis:     45.27329730 +/-    0.0026
Time of Perihelion: 2435525.5953 +/-      55.4
Perihelion:          44.62020536 +/-    0.0037
Aphelion:            45.92638923 +/-    0.0037
Period (y)              304.6291 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           16.65233648 +/-    0.0003
Ecliptic Y           41.67188362 +/-    0.0006
Ecliptic Z           -0.91932106 +/-    0.0000
Ecliptic XDOT        -0.00238218 +/-    0.0000
Ecliptic YDOT         0.00098543 +/-    0.0000
Ecliptic ZDOT         0.00005740 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.88531326 +/-    0.0006
Geocenter to KBO     43.90512730 +/-    0.0007
# Hcoef:  6.16

The following table shows the complete astrometric record for 00WT169. 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 (00WT169) followed by the observatory code and reference code for the source of the astrometry.

2000 11  23.45513  04 27 18.50   +20 30 57.6         00WT169   568  Cc3044      
2000 11  23.47774  04 27 18.42   +20 30 57.5         00WT169   568  Cc3044      
2000 11  23.50024  04 27 18.30   +20 30 57.2         00WT169   568  Cc3044      
2000 11  29.48449  04 26 48.99   +20 29 53.2   21.9R 00WT169   568  Cc3044      
2000 11  29.50227  04 26 48.88   +20 29 52.8   22.0R 00WT169   568  Cc3044      
2000 12  17.46296  04 25 22.31   +20 26 47.5   22.0R 00WT169   568  Cc4033      
2000 12  17.47846  04 25 22.24   +20 26 47.3   22.1R 00WT169   568  Cc4033      
2001 01  25.13017  04 23 02.56   +20 22 17.3   22.7R 00WT169   695  Cc6724      
2001 01  25.22623  04 23 02.33   +20 22 16.9         00WT169   695  Cc6724      
2001 02  16.89482  04 22 35.05   +20 21 54.9         00WT169   950  Cc6724      
2001 02  18.97751  04 22 34.96   +20 21 58.6         00WT169   950  Cc6724      
2001 02  20.26288  04 22 35.22   +20 22 00.5   22.6R 00WT169   568  Cc6724      
2001 02  21.23176  04 22 35.44   +20 22 02.9   22.7R 00WT169   568  Cc6724      
2002 01  09.35957  04 28 56.91   +20 36 52.5   22.3R 00WT169   568  Ce6590      
2002 01  09.39748  04 28 56.76   +20 36 51.8   22.2R 00WT169   568  Ce6590      
2002 01  14.20980  04 28 40.38   +20 36 22.6   22.5R 00WT169   568  Ce6590      
2002 01  14.22422  04 28 40.33   +20 36 22.5   22.4R 00WT169   568  Ce6590      
2002 01  14.23044  04 28 40.31   +20 36 22.5   22.3R 00WT169   568  Ce6590      
2002 11  06.52312  04 38 59.94   +20 58 51.4   22.0R 00WT169   568  Cl8320      
2002 11  06.56643  04 38 59.76   +20 58 51.1         00WT169   568  Cl8320      
2005 03  09.14215  04 43 01.31   +21 12 01.6         00WT169   G96  Cn1549      
2005 03  11.14357  04 43 04.33   +21 12 11.2         00WT169   G96  Cn1549      
2006 01  31.242897 04 48 24.96   +21 22 21.2   22.6V 00WT169   645  C~2GiT      
2006 01  31.243726 04 48 24.96   +21 22 21.4   22.0V 00WT169   645  C~2GiT      
2006 01  31.246214 04 48 24.97   +21 22 21.2   24.0V 00WT169   645  C~2GiT      
2008 09  24.39129  05 11 46.77   +22 01 13.7   23.6R 00WT169   250  S~06AO      
2008 09  24.39754  05 11 46.77   +22 01 13.6         00WT169   250  S~06AO      
2008 09  24.40449  05 11 46.76   +22 01 13.6         00WT169   250  S~06AO      
2008 09  24.41074  05 11 46.76   +22 01 13.6         00WT169   250  S~06AO      
2008 12  01.45455  05 08 10.56   +21 56 16.7   22.0R 00WT169   688  C~02MI      
2008 12  01.49965  05 08 10.33   +21 56 16.1         00WT169   688  C~02MI      
2010 01  27.46752  05 09 12.45   +22 00 08.1         00WT169   250  S~0M3F      
2010 01  27.46991  05 09 12.44   +22 00 08.0         00WT169   250  S~0M3F      
2010 01  27.47272  05 09 12.43   +22 00 08.0         00WT169   250  S~0M3F      
2010 01  27.47510  05 09 12.43   +22 00 08.1         00WT169   250  S~0M3F      
2010 01  27.48019  05 09 12.35   +22 00 08.0         00WT169   250  S~0M3F      
2010 01  27.48574  05 09 12.33   +22 00 08.0         00WT169   250  S~0M3F      
2010 01  27.49190  05 09 12.30   +22 00 07.9         00WT169   250  S~0M3F      
2010 01  27.49745  05 09 12.28   +22 00 07.9         00WT169   250  S~0M3F      

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    -0.34       0.00    -0.68
  2   0.0001     -1.13     0.13       0.08    -0.61
  3   0.0001     -2.84     0.00       0.04    -0.65
  4   0.0165   -419.57     0.08       1.46    -0.27
  5   0.0166   -421.16    -0.25       1.31    -0.43
  6   0.0657  -1651.72     0.17      11.04    -0.28
  7   0.0658  -1652.72     0.21      11.00    -0.33
  8   0.1716  -3634.58    -0.40      61.15     0.57
  9   0.1719  -3637.84    -0.52      61.29     0.54
 10   0.2339  -4020.03    -0.31     102.24     0.73
 11   0.2396  -4020.67    -0.53     106.10     0.68
 12   0.2431  -4016.75     0.52     107.38    -0.51
 13   0.2458  -4013.31     0.31     109.24    -0.48
 14   1.1277   1420.45     0.52     135.93     0.57
 15   1.1278   1418.26     0.29     135.56     0.15
 16   1.1410   1186.53     0.27     142.19     0.10
 17   1.1411   1185.82     0.23     142.20     0.08
 18   1.1411   1185.54     0.25     142.25     0.12
 19   1.9523   9986.14    -0.10     202.68     0.01
 20   1.9524   9983.60     0.04     202.74     0.07
 21   4.2894  13451.33    -1.29     528.41     0.03
 22   4.2948  13494.65     0.07     532.35     0.55
 23   5.1876  18043.78     0.07     563.64     0.12
 24   5.1876  18043.81     0.13     563.84     0.32
 25   5.1877  18043.92     0.32     563.62     0.10
 26   7.8356  38095.84    -0.07     831.97     0.36
 27   7.8356  38095.84    -0.04     831.87     0.27
 28   7.8356  38095.69    -0.13     831.88     0.28
 29   7.8356  38095.69    -0.09     831.88     0.29
 30   8.0219  34979.00     0.22     803.66     0.59
 31   8.0220  34975.66     0.12     803.35     0.28
 32   9.1773  35883.48     0.53     957.87    -0.29
 33   9.1773  35883.32     0.48     957.78    -0.38
 34   9.1773  35883.18     0.46     957.79    -0.37
 35   9.1773  35883.19     0.57     957.89    -0.28
 36   9.1773  35882.04    -0.36     957.89    -0.28
 37   9.1774  35881.75    -0.41     957.92    -0.26
 38   9.1774  35881.32    -0.58     957.85    -0.34
 39   9.1774  35881.03    -0.63     957.88    -0.32

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.

00WT169    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.232    45.240    45.225
ecceobj         0.015     0.015     0.015
incobj          1.744     1.744     1.744
qmin           43.568    43.557    43.568
qmax           46.504    46.502    46.472
amean          44.944    44.951    44.936
amin           44.598    44.606    44.586
amax           45.303    45.306    45.294
emean           0.014     0.014     0.014
emin            0.000     0.000     0.000
emax            0.027     0.027     0.026
imean           0.652     0.651     0.653
imin            0.091     0.091     0.091
imax            1.031     1.030     1.033
excite_mean     0.019     0.019     0.019
fracstop        1.000     1.000     1.000
cjmean          3.113     3.113     3.113

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       195.0     194.9     194.8
kozaiamp        180.0     180.0     180.0