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 Thu Oct 19 01:37:57 2017
# Orbit generated from Bernstein formalism
# Fitting   33 observations of   33
# Arc:   6.05y
# First observation: 2011/09/04
#  Last observation: 2017/09/23
Preliminary a, adot, b, bdot, g, gdot:
   0.001243   0.067281  -0.000265   0.002547   0.057320   0.000000
# Chi-squared of fit:   140.28 DOF:   60 RMS:  0.36
# Min/Max residuals:    -1.29    0.81
# Exact a, adot, b, bdot, g, gdot:
  1.582049E-05  6.004069E-02  2.271170E-06  2.143542E-03  5.082045E-02 -1.010401E-02
# Covariance matrix:
  2.7037E-13 -1.3562E-14 -4.8420E-15  2.7271E-16  2.7128E-13  5.2478E-14
 -1.3562E-14  8.9273E-14 -2.3860E-15  3.3350E-15  5.5152E-14  2.2098E-13
 -4.8420E-15 -2.3860E-15  6.4479E-14 -1.8065E-14 -7.8839E-15 -7.9569E-15
  2.7271E-16  3.3350E-15 -1.8065E-14  1.4684E-14  2.5608E-15  9.8754E-15
  2.7128E-13  5.5152E-14 -7.8839E-15  2.5608E-15  3.8978E-13  2.1449E-13
  5.2478E-14  2.2098E-13 -7.9569E-15  9.8754E-15  2.1449E-13  6.6096E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   10.898602   18.377665    0.606271    0.151598   -0.787519  2455808.932936
# Heliocentric elements and errors
Epoch:              2455800.5000  =  2011/08/27
Mean Anomaly:          227.60833 +/-     0.008
Argument of Peri:      230.66280 +/-     0.004
Long of Asc Node:      299.11278 +/-     0.001
Inclination:            10.71449 +/-     0.000
Eccentricity:         0.31477278 +/-    0.0000
Semi-Major Axis:     16.35995847 +/-    0.0005
Time of Perihelion: 2464689.0289 +/-       0.3
Perihelion:          11.21028885 +/-    0.0005
Aphelion:            21.50962810 +/-    0.0008
Period (y)               66.1731 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           19.29255438 +/-    0.0002
Ecliptic Y            5.77041183 +/-    0.0001
Ecliptic Z            3.72045160 +/-    0.0000
Ecliptic XDOT        -0.00155097 +/-    0.0000
Ecliptic YDOT         0.00289957 +/-    0.0000
Ecliptic ZDOT         0.00001054 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   20.47784333 +/-    0.0002
Geocenter to KBO     19.67711850 +/-    0.0002
# Hcoef:  8.64

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.

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     0.59       0.00    -0.33
  2   0.0001     -3.70     0.23       0.78    -0.22
  3   0.0001     -5.83    -0.21       1.49     0.15
  4   0.1228  -6172.29     0.07     422.13    -0.11
  5   0.1228  -6174.18     0.23     422.47     0.26
  6   0.1229  -6176.56    -0.08     421.99    -0.19
  7   0.1281  -6457.66     0.50     413.90    -0.26
  8   0.1282  -6459.96     0.27     414.04    -0.06
  9   0.1282  -6462.37     0.09     413.90    -0.13
 10   0.1334  -6733.76    -0.21     403.68    -0.30
 11   0.1334  -6736.79    -0.04     403.59    -0.28
 12   0.1335  -6739.64     0.12     403.54    -0.23
 13   0.1335  -6741.55    -0.37     403.84     0.14
 14   0.1335  -6742.68    -0.35     403.79     0.12
 15   0.1336  -6743.67    -0.11     403.68     0.05
 16   0.1336  -6744.71    -0.15     403.81     0.22
 17   0.1390  -7027.93    -0.03     390.72     0.10
 18   0.1390  -7028.23     0.08     390.61    -0.00
 19   0.1390  -7028.70     0.04     390.70     0.11
 20   0.3030 -12201.93    -1.18    -882.01     0.54
 21   0.3033 -12201.52     0.51    -886.04     0.44
 22   2.0769  22010.29     0.30    1353.03     0.11
 23   2.0770  22004.44    -0.08    1352.18    -1.02
 24   2.0942  21069.82    -0.10    1384.84     0.64
 25   2.0943  21061.33    -1.29    1384.71     0.35
 26   2.1558  17654.73    -0.39    1290.42     0.32
 27   2.1559  17649.92     0.29    1289.53    -0.19
 28   2.1734  16730.88    -0.11    1206.74     0.20
 29   2.1735  16722.81     0.14    1205.76     0.06
 30   2.2271  14293.12     0.38     812.76    -0.08
 31   2.2272  14290.59     0.81     811.84    -0.33
 32   6.0533  83450.79     0.05    3623.59    -0.12
 33   6.0535  83439.48    -0.02    3625.06     0.07

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    16.357    16.354
ecceobj         0.314     0.314     0.314
incobj         10.720    10.720    10.720
qmin           10.927     9.398    10.935
qmax           22.654    22.047    27.157
amean          16.414    14.573    17.084
amin           15.997    10.419    16.156
amax           17.061    16.718    19.244
emean           0.320     0.254     0.336
emin            0.284     0.097     0.297
emax            0.334     0.334     0.411
imean          11.614    11.084    11.345
imin           11.109     8.606     9.779
imax           12.369    13.274    12.909
excite_mean     0.378     0.320     0.389
fracstop        0.003     0.007     0.009
cjmean          3.206     3.413     3.156

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       278.8     206.4     195.5
kozaiamp         55.0     171.2     176.8