Orbit Fit and Astrometric record for 11UD63

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: 11UD63    
# Created Fri May 25 01:37:59 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   42 observations of   42
# Arc:  16.98y
# First observation: 2000/10/02
#  Last observation: 2017/09/23
# Chi-squared of fit:   171.08 DOF:   78 RMS:  0.36
# Min/Max residuals:    -1.38    1.00
# Exact a, adot, b, bdot, g, gdot:
  1.778525E-05  5.427742E-02  2.378016E-06  7.499804E-03  4.869077E-02  1.888480E-03
# Covariance matrix:
  4.8912E-13 -8.7971E-13  1.3706E-15 -6.9086E-14  5.1557E-13 -1.2499E-12
 -8.7971E-13  2.4954E-10 -3.2671E-13  2.0694E-11 -1.2793E-10  3.7141E-10
  1.3706E-15 -3.2671E-13  4.8526E-13 -7.0805E-14  1.8304E-13 -4.8730E-13
 -6.9086E-14  2.0694E-11 -7.0805E-14  1.7331E-12 -1.0596E-11  3.0802E-11
  5.1557E-13 -1.2793E-10  1.8304E-13 -1.0596E-11  7.0484E-11 -1.9073E-10
 -1.2499E-12  3.7141E-10 -4.8730E-13  3.0802E-11 -1.9073E-10  5.5286E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    7.775056  -18.376425   -0.460351    0.119122   -0.873805  2451819.798275
# Heliocentric elements and errors
Epoch:              2451820.5000  =  2000/10/03
Mean Anomaly:          168.05468 +/-     0.009
Argument of Peri:      230.74418 +/-     0.001
Long of Asc Node:      299.21832 +/-     0.001
Inclination:            10.72872 +/-     0.000
Eccentricity:         0.31501210 +/-    0.0000
Semi-Major Axis:     16.33854257 +/-    0.0001
Time of Perihelion: 2440559.7708 +/-       0.6
Perihelion:          11.19170399 +/-    0.0001
Aphelion:            21.48538116 +/-    0.0002
Period (y)               66.0432 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           20.29878563 +/-    0.0001
Ecliptic Y           -6.25146922 +/-    0.0001
Ecliptic Z            2.77850000 +/-    0.0000
Ecliptic XDOT         0.00100035 +/-    0.0000
Ecliptic YDOT         0.00288614 +/-    0.0000
Ecliptic ZDOT         0.00043236 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   21.42056981 +/-    0.0001
Geocenter to KBO     20.53779751 +/-    0.0001
# Hcoef:  8.66

The following table shows the complete astrometric record for 11UD63. 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 (11UD63) followed by the observatory code and reference code for the source of the astrometry.

2000 10  02.297532 22 40 23.73   -00 00 26.6   21.9V 11UD63    645  C~2POS      
2000 10  02.298362 22 40 23.72   -00 00 26.5   21.8V 11UD63    645  C~2POS      
2000 10  02.300849 22 40 23.71   -00 00 26.7   22.6V 11UD63    645  C~2POS      
2008 10  29.328978 00 05 21.33   +11 55 28.3   21.9V 11UD63    645  C~2POS      
2008 10  29.329807 00 05 21.32   +11 55 28.1   21.8V 11UD63    645  C~2POS      
2008 10  29.332295 00 05 21.30   +11 55 28.0   22.7V 11UD63    645  C~2POS      
2008 12  30.095546 00 03 03.85   +11 13 56.6   21.9V 11UD63    645  C~2POS      
2008 12  30.096375 00 03 03.84   +11 13 56.5   21.9V 11UD63    645  C~2POS      
2008 12  30.098863 00 03 03.85   +11 13 56.5   22.5V 11UD63    645  C~2POS      
2011 09  04.43217  00 50 31.545  +17 15 16.62  22.2w 11UD63    F51  C~0a0r      
2011 09  04.46192  00 50 31.286  +17 15 15.87  22.1w 11UD63    F51  C~0a0r      
2011 09  04.47691  00 50 31.130  +17 15 15.68  22.3w 11UD63    F51  C~0a0r      
2011 10  19.28091  00 43 45.483  +16 40 39.93  22.0w 11UD63    F51  C~0ZWr      
2011 10  19.29480  00 43 45.353  +16 40 39.48  22.4w 11UD63    F51  C~0ZWr      
2011 10  19.30875  00 43 45.215  +16 40 38.08  22.4w 11UD63    F51  C~0ZWr      
2011 10  21.238927 00 43 27.56   +16 38 37.4   21.8V 11UD63    H21  C~0ZWr      
2011 10  21.252984 00 43 27.41   +16 38 36.6   22.1V 11UD63    H21  C~0ZWr      
2011 10  21.268228 00 43 27.26   +16 38 35.5   21.9V 11UD63    H21  C~0ZWr      
2011 10  23.144645 00 43 10.29   +16 36 36.7   21.9V 11UD63    H21  C~0ZWr      
2011 10  23.166574 00 43 10.10   +16 36 35.4   21.8V 11UD63    H21  C~0ZWr      
2011 10  23.187271 00 43 09.92   +16 36 34.2   22.2V 11UD63    H21  C~0ZWr      
2011 10  23.19790  00 43 09.79   +16 36 33.7   21.0R 11UD63    H01  C~0ZWr      
2011 10  23.20573  00 43 09.72   +16 36 33.2   21.4R 11UD63    H01  C~0ZWr      
2011 10  23.21415  00 43 09.66   +16 36 32.7   21.4R 11UD63    H01  C~0ZWr      
2011 10  23.22101  00 43 09.59   +16 36 32.4   21.0R 11UD63    H01  C~0ZWr      
2011 10  25.202818 00 42 51.956  +16 34 26.13  20.9R 11UD63    568  C~0a0r      
2011 10  25.205743 00 42 51.940  +16 34 25.90  20.9R 11UD63    568  C~0a0r      
2011 10  25.208653 00 42 51.908  +16 34 25.80  20.9R 11UD63    568  C~0a0r      
2011 12  24.08682  00 38 00.58   +15 40 04.6   21.2R 11UD63    688  C~0beW      
2011 12  24.21759  00 38 00.72   +15 40 01.1         11UD63    688  C~0beW      
2013 10  02.01554  01 13 41.71   +19 55 13.1         11UD63    621  C~0xRq      
2013 10  02.05248  01 13 41.35   +19 55 10.2   21.7R 11UD63    621  C~0xRq      
2013 10  08.32978  01 12 39.51   +19 50 02.2   20.6R 11UD63    H36  C~14jW      
2013 10  08.37745  01 12 38.96   +19 49 59.0   20.8R 11UD63    H36  C~14jW      
2013 10  30.84092  01 08 59.26   +19 27 45.5         11UD63    621  C~0xRq      
2013 10  30.87786  01 08 58.97   +19 27 42.9   21.7R 11UD63    621  C~0xRq      
2013 11  06.25819  01 08 01.27   +19 20 46.6   20.9R 11UD63    G37  C~0ykP      
2013 11  06.31657  01 08 00.77   +19 20 42.7         11UD63    G37  C~0ykP      
2013 11  25.89050  01 05 33.04   +18 59 34.3         11UD63    621  C~0xRq      
2013 11  25.91821  01 05 32.90   +18 59 32.5   21.4R 11UD63    621  C~0xRq      
2017 09  23.40093  02 18 30.81   +25 30 59.8   20.7R 11UD63    G37  C~2LRv      
2017 09  23.48447  02 18 30.09   +25 30 58.6         11UD63    G37  C~2LRv      

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    -0.35       0.00    -0.69
  2   0.0000      0.00    -0.01       0.00     0.18
  3   0.0000      0.00     0.12       0.00     0.11
  4   8.0740      0.00     0.23       0.00     0.09
  5   8.0740      0.00     0.17       0.00    -0.06
  6   8.0740      0.00     0.14       0.00    -0.00
  7   8.2431      0.00     0.04       0.00    -0.09
  8   8.2431      0.00    -0.15       0.00    -0.18
  9   8.2431      0.00    -0.12       0.00    -0.16
 10  10.9217      0.00     0.80       0.00    -0.04
 11  10.9217      0.00     0.42       0.00    -0.08
 12  10.9218      0.00    -0.16       0.00     0.09
 13  11.0444      0.00     0.20       0.00    -0.03
 14  11.0445      0.00     0.20       0.00     0.38
 15  11.0445      0.00     0.09       0.00    -0.16
 16  11.0498      0.00     0.67       0.00     0.02
 17  11.0498      0.00     0.37       0.00     0.10
 18  11.0499      0.00     0.23       0.00    -0.03
 19  11.0550      0.00     0.01       0.00    -0.31
 20  11.0551      0.00     0.16       0.00    -0.22
 21  11.0551      0.00     0.30       0.00    -0.11
 22  11.0552      0.00    -0.32       0.00     0.03
 23  11.0552      0.00    -0.30       0.00     0.02
 24  11.0552      0.00    -0.04       0.00     0.05
 25  11.0552      0.00    -0.15       0.00     0.19
 26  11.0607      0.00     0.01       0.00     0.12
 27  11.0607      0.00     0.16       0.00     0.08
 28  11.0607      0.00     0.07       0.00     0.16
 29  11.2246      0.00    -1.38       0.00     0.02
 30  11.2250      0.00     0.25       0.00     0.62
 31  12.9985      0.00     0.40       0.00     0.27
 32  12.9986      0.00     0.46       0.00    -0.90
 33  13.0158      0.00    -0.20       0.00     0.62
 34  13.0160      0.00    -1.25       0.00    -0.08
 35  13.0775      0.00    -0.38       0.00     0.23
 36  13.0776      0.00     0.49       0.00     0.01
 37  13.0950      0.00    -0.06       0.00     0.22
 38  13.0952      0.00     0.23       0.00     0.18
 39  13.1488      0.00     0.49       0.00     0.14
 40  13.1489      0.00     1.00       0.00     0.06
 41  16.9750      0.00     0.14       0.00    -0.07
 42  16.9752      0.00     0.02       0.00     0.08

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.

11UD63    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        16.355    16.355    16.355
ecceobj         0.314     0.314     0.314
incobj         10.720    10.720    10.720
qmin           10.925    10.926    10.922
qmax           22.367    22.051    22.474
amean          16.602    16.866    16.359
amin           16.097    16.155    15.549
amax           17.173    17.289    17.016
emean           0.312     0.258     0.306
emin            0.284     0.194     0.264
emax            0.334     0.334     0.334
imean          12.038    12.626    12.474
imin           11.122    11.122    11.122
imax           13.109    14.068    13.671
excite_mean     0.376     0.340     0.375
fracstop        0.004     0.011     0.010
cjmean          3.195     3.197     3.213

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       217.0     172.1     146.7
kozaiamp        176.6     178.4     177.9