Orbit Fit and Astrometric record for 07TK422

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: 07TK422   
# Created Thu May 24 01:37:35 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   33 observations of   33
# Arc:  17.25y
# First observation: 2000/09/21
#  Last observation: 2017/12/20
# Chi-squared of fit:   105.73 DOF:   60 RMS:  0.32
# Min/Max residuals:    -0.77    1.71
# Exact a, adot, b, bdot, g, gdot:
  2.463696E-05  8.127700E-02 -5.536077E-07  9.743606E-05  5.479541E-02  1.240643E-02
# Covariance matrix:
  5.4295E-13  7.4696E-13  2.3207E-14  3.6464E-14 -1.7194E-12  1.9095E-12
  7.4696E-13  5.9981E-12  1.6303E-13  2.1917E-13 -3.4715E-12  1.2414E-11
  2.3207E-14  1.6303E-13  3.3394E-13 -6.9203E-14 -1.0307E-13  3.4222E-13
  3.6464E-14  2.1917E-13 -6.9203E-14  7.2307E-14 -2.0405E-13  4.7009E-13
 -1.7194E-12 -3.4715E-12 -1.0307E-13 -2.0405E-13  1.7433E-11 -9.6186E-12
  1.9095E-12  1.2414E-11  3.4222E-13  4.7009E-13 -9.6186E-12  2.6330E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.220905  -23.753183   -0.374050   -0.052226   -0.924467  2451808.703543
# Heliocentric elements and errors
Epoch:              2451808.5000  =  2000/09/21
Mean Anomaly:           51.08804 +/-     0.002
Argument of Peri:      201.05250 +/-     0.000
Long of Asc Node:       65.48975 +/-     0.000
Inclination:             3.06595 +/-     0.000
Eccentricity:         0.19218587 +/-    0.0000
Semi-Major Axis:     21.17306519 +/-    0.0000
Time of Perihelion: 2446758.5068 +/-       0.2
Perihelion:          17.10390122 +/-    0.0001
Aphelion:            25.24222916 +/-    0.0001
Period (y)               97.4280 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           17.68114731 +/-    0.0000
Ecliptic Y           -7.36505571 +/-    0.0000
Ecliptic Z           -1.02535452 +/-    0.0000
Ecliptic XDOT         0.00219505 +/-    0.0000
Ecliptic YDOT         0.00347267 +/-    0.0000
Ecliptic ZDOT        -0.00002981 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   19.18112591 +/-    0.0000
Geocenter to KBO     18.24967436 +/-    0.0000
# Hcoef:  8.64

The following table shows the complete astrometric record for 07TK422. 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 (07TK422) followed by the observatory code and reference code for the source of the astrometry.

2000 09  21.20280  22 36 54.71   -12 12 41.2   19.0R 07TK422   695  C~0NlL      
2000 09  21.28587  22 36 54.00   -12 12 43.3         07TK422   695  C~0NlL      
2001 09  19.291473 22 54 33.90   -10 25 58.9   22.1V 07TK422   645  C~1SLI      
2001 09  19.292302 22 54 33.89   -10 25 59.0   21.6V 07TK422   645  C~1SLI      
2001 09  19.294790 22 54 33.88   -10 25 59.1   22.5V 07TK422   645  C~1SLI      
2007 09  15.29012  00 27 08.68   -00 05 42.3   22.5  07TK422   705  cx9534      
2007 09  15.29344  00 27 08.66   -00 05 42.3   23.4  07TK422   705  cx9534      
2007 09  22.32252  00 26 10.32   -00 12 01.7   21.5  07TK422   705  cx9534      
2007 09  22.32335  00 26 10.33   -00 12 01.8   21.3  07TK422   705  cx9534      
2007 10  06.33146  00 24 11.32   -00 24 33.2   22.6  07TK422   705  cx9534      
2007 10  06.33395  00 24 11.29   -00 24 33.1   23.5  07TK422   705  cx9534      
2007 10  13.33235  00 23 12.78   -00 30 30.7   22.7  07TK422   705  cx9534      
2007 10  13.33567  00 23 12.78   -00 30 30.8   22.9  07TK422   705  cx9534      
2007 10  15.33725  00 22 56.41   -00 32 09.0   22.4  07TK422   705  cx9534      
2007 10  15.33974  00 22 56.39   -00 32 09.4   23.2  07TK422   705  cx9534      
2007 10  20.32183  00 22 16.69   -00 36 04.9   22.7  07TK422   705  cx9534      
2007 10  20.32515  00 22 16.67   -00 36 04.9   23.5  07TK422   705  cx9534      
2007 11  11.25369  00 19 48.02   -00 49 52.8   22.6  07TK422   705  cx9534      
2007 11  11.25701  00 19 48.01   -00 49 53.0   23.4  07TK422   705  cx9534      
2007 11  12.24062  00 19 42.65   -00 50 20.3   22.6  07TK422   705  cx9534      
2007 11  12.24394  00 19 42.62   -00 50 20.7   23.3  07TK422   705  cx9534      
2008 12  01.09201  00 31 54.85   +00 37 50.3   22.2R 07TK422   688  C~02eZ      
2008 12  01.25939  00 31 54.33   +00 37 49.7         07TK422   688  C~02eZ      
2008 12  21.15619  00 31 30.50   +00 38 14.5   21.4r 07TK422   695  C~02eZ      
2008 12  22.09904  00 31 31.11   +00 38 27.1   21.3r 07TK422   695  C~02eZ      
2008 12  22.18482  00 31 31.17   +00 38 28.2   21.5r 07TK422   695  C~02eZ      
2010 09  17.32927  01 07 09.39   +04 30 54.4   22.2R 07TK422   688  C~0NHt      
2010 09  17.38043  01 07 09.00   +04 30 51.9         07TK422   688  C~0NHt      
2014 10  28.25425  01 51 57.32   +09 29 53.0   22.2R 07TK422   G37  C~1eNK      
2014 10  28.29618  01 51 56.97   +09 29 51.2         07TK422   G37  C~1eNK      
2014 10  28.30824  01 51 56.86   +09 29 50.5         07TK422   G37  C~1eNK      
2017 12  20.14720  02 21 32.165  +12 37 10.19  22.5R 07TK422   G37  C~2UvC      
2017 12  20.22336  02 21 31.816  +12 37 08.77        07TK422   G37  C~2UvC      

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    -0.77
  2   0.0002      0.00    -0.06       0.00     1.71
  3   0.9941      0.00     0.15       0.00    -0.43
  4   0.9941      0.00     0.11       0.00    -0.49
  5   0.9941      0.00     0.30       0.00    -0.46
  6   6.9818      0.00     0.29       0.00    -0.29
  7   6.9818      0.00     0.41       0.00    -0.11
  8   7.0010      0.00     0.04       0.00     0.10
  9   7.0010      0.00     0.30       0.00     0.04
 10   7.0394      0.00     0.31       0.00    -0.15
 11   7.0394      0.00     0.19       0.00     0.08
 12   7.0585      0.00    -0.15       0.00    -0.16
 13   7.0585      0.00     0.26       0.00    -0.10
 14   7.0640      0.00     0.06       0.00     0.08
 15   7.0640      0.00     0.07       0.00    -0.20
 16   7.0777      0.00     0.05       0.00    -0.04
 17   7.0777      0.00     0.15       0.00     0.11
 18   7.1377      0.00     0.02       0.00     0.05
 19   7.1377      0.00     0.15       0.00    -0.06
 20   7.1404      0.00     0.16       0.00    -0.04
 21   7.1404      0.00    -0.02       0.00    -0.35
 22   8.1941      0.00    -0.14       0.00    -0.11
 23   8.1945      0.00    -0.27       0.00     1.00
 24   8.2490      0.00    -0.04       0.00     0.17
 25   8.2516      0.00    -0.01       0.00     0.21
 26   8.2518      0.00     0.13       0.00     0.11
 27   9.9880      0.00     0.00       0.00     0.01
 28   9.9882      0.00     0.00       0.00    -0.05
 29  14.1001      0.00     0.00       0.00     0.14
 30  14.1002      0.00     0.07       0.00     0.18
 31  14.1002      0.00    -0.05       0.00     0.02
 32  17.2456      0.00     0.05       0.00     0.05
 33  17.2458      0.00     0.18       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.

07TK422    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        21.212    21.212    21.212
ecceobj         0.193     0.193     0.193
incobj          3.066     3.066     3.066
qmin           16.461    16.844    16.819
qmax           25.558    25.557    25.558
amean          20.999    21.011    21.077
amin           20.388    20.709    20.795
amax           21.280    21.280    21.281
emean           0.196     0.190     0.194
emin            0.191     0.180     0.190
emax            0.201     0.201     0.201
imean           2.745     2.783     2.650
imin            2.171     2.171     2.171
imax            4.230     3.290     3.751
excite_mean     0.202     0.196     0.200
fracstop        0.001     0.001     0.001
cjmean          3.069     3.070     3.067

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       213.5     222.2     212.8
kozaiamp         14.9      24.2      16.4