Orbit Fit and Astrometric record for 11BT163

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: 11BT163   
# Created Sat Dec  4 02:11:12 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     36 observations of     36
# Arc:  16.04y
# First observation: 2005/02/04
#  Last observation: 2021/02/17
# Chi-squared of fit:    36.07 DOF:     66 RMS:  0.18
# Min/Max residuals:    -0.33    0.60
# Exact a, adot, b, bdot, g, gdot:
  1.351821E-05  2.174125E-02 -8.666577E-06 -1.389611E-02  2.465761E-02  6.754110E-03
# Covariance matrix:
  1.5683E-13 -3.0767E-14 -2.3761E-14  1.2445E-14 -6.2745E-14 -6.0281E-14
 -3.0767E-14  1.1684E-14  1.1856E-14 -6.2711E-15  2.1771E-14  3.0436E-14
 -2.3761E-14  1.1856E-14  1.2673E-13 -1.7234E-14  2.0300E-14  3.5647E-14
  1.2445E-14 -6.2711E-15 -1.7234E-14  5.3414E-15 -9.1384E-15 -1.9000E-14
 -6.2745E-14  2.1771E-14  2.0300E-14 -9.1384E-15  2.8490E-13  4.2835E-14
 -6.0281E-14  3.0436E-14  3.5647E-14 -1.9000E-14  4.2835E-14  9.2356E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.961587  139.103819    0.064552    0.050768   -0.979369  2453405.806525
# Heliocentric elements and errors
Epoch:              2453406.5000  =  2005/02/05
Mean Anomaly:           32.22862 +/-     0.007
Argument of Peri:      112.16682 +/-     0.009
Long of Asc Node:      323.54787 +/-     0.000
Inclination:            32.60261 +/-     0.000
Eccentricity:         0.33792023 +/-    0.0000
Semi-Major Axis:     54.21906092 +/-    0.0065
Time of Perihelion: 2440351.8393 +/-       3.6
Perihelion:          35.89734324 +/-    0.0051
Aphelion:            72.54077860 +/-    0.0091
Period (y)              399.2420 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -31.31850738 +/-    0.0007
Ecliptic Y           27.20627781 +/-    0.0006
Ecliptic Z            2.09500937 +/-    0.0000
Ecliptic XDOT        -0.00220706 +/-    0.0000
Ecliptic YDOT        -0.00128944 +/-    0.0000
Ecliptic ZDOT        -0.00150208 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.53799579 +/-    0.0006
Geocenter to KBO     40.55529593 +/-    0.0009
# Hcoef:  5.97

The following table shows the complete astrometric record for 11BT163. 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 (11BT163) followed by the observatory code and reference code for the source of the astrometry.

2005 02  04.305782 09 29 59.23   +17 54 25.9   22.2V 11BT163   645  C~2POP      
2005 02  04.306612 09 29 59.24   +17 54 26.0   21.6V 11BT163   645  C~2POP      
2005 02  04.309099 09 29 59.21   +17 54 26.2   23.0V 11BT163   645  C~2POP      
2005 03  10.206278 09 27 09.26   +18 02 33.8   21.9V 11BT163   645  C~2POP      
2005 03  10.207108 09 27 09.26   +18 02 33.6   21.8V 11BT163   645  C~2POP      
2005 03  10.209595 09 27 09.26   +18 02 33.6   23.2V 11BT163   645  C~2POP      
2005 11  10.500423 09 37 49.28   +16 34 30.2   22.6V 11BT163   645  C~2POP      
2005 11  10.500838 09 37 49.27   +16 34 30.3   22.6V 11BT163   645  C~2POP      
2005 11  10.501252 09 37 49.27   +16 34 30.2   21.9V 11BT163   645  C~2POP      
2005 11  10.503740 09 37 49.27   +16 34 30.4   24.7V 11BT163   645  C~2POP      
2005 11  10.504155 09 37 49.27   +16 34 30.4   24.1V 11BT163   645  C~2POP      
2011 01  30.35119  09 52 12.605  +11 11 43.38  22.8w 11BT163   F51  C~1w3m      
2011 01  30.38138  09 52 12.460  +11 11 43.97  22.7w 11BT163   F51  C~1w3m      
2011 02  03.37461  09 51 53.581  +11 12 49.98  22.5w 11BT163   F51  C~1w3m      
2011 02  03.39004  09 51 53.515  +11 12 50.44  22.6w 11BT163   F51  C~1w3m      
2012 02  03.54090  09 55 14.930  +10 08 31.11  22.3i 11BT163   F51  C~1w3m      
2012 02  14.35917  09 54 23.184  +10 11 39.34  22.6w 11BT163   F51  C~1w3m      
2012 02  14.37339  09 54 23.169  +10 11 39.52  22.6w 11BT163   F51  C~1w3m      
2012 02  14.38755  09 54 23.067  +10 11 39.95  22.6w 11BT163   F51  C~1w3m      
2012 02  14.40173  09 54 22.997  +10 11 40.08  22.4w 11BT163   F51  C~1w3m      
2013 02  21.45534  09 57 03.642  +09 10 28.41  21.3i 11BT163   F51  C~1w3m      
2013 03  04.31276  09 56 12.969  +09 13 48.98  22.3w 11BT163   F51  C~1w3m      
2013 03  04.32701  09 56 12.903  +09 13 49.22  22.1w 11BT163   F51  C~1w3m      
2013 03  04.34125  09 56 12.854  +09 13 49.52  22.3w 11BT163   F51  C~1w3m      
2014 02  23.38161  10 00 10.593  +08 08 09.16  22.4w 11BT163   F51  C~1w3m      
2014 02  26.46046  09 59 56.188  +08 09 06.94  22.4w 11BT163   F51  C~1w3m      
2014 02  26.47204  09 59 56.121  +08 09 07.14  22.5w 11BT163   F51  C~1w3m      
2014 02  28.34988  09 59 47.408  +08 09 42.52  22.4w 11BT163   F51  C~1w3m      
2014 03  06.36532  09 59 19.988  +08 11 35.54  21.7i 11BT163   F51  C~1w3m      
2021 02  07.44272  10 22 29.832  +01 05 12.55  22.4w 11BT163   F51  C~4Z2v      
2021 02  07.45472  10 22 29.793  +01 05 12.89  22.2w 11BT163   F51  C~4Z2v      
2021 02  07.47874  10 22 29.685  +01 05 13.15  22.5w 11BT163   F51  C~4Z2v      
2021 02  17.475263 10 21 45.873  +01 07 55.39  22.2w 11BT163   F51  C~4Z2v      
2021 02  17.488086 10 21 45.822  +01 07 55.59  22.3w 11BT163   F51  C~4Z2v      
2021 02  17.500823 10 21 45.759  +01 07 55.97  22.4w 11BT163   F51  C~4Z2v      
2021 02  17.513536 10 21 45.696  +01 07 56.26  22.3w 11BT163   F51  C~4Z2v      

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     0.07       0.00    -0.08
     2   0.0000      0.00     0.29       0.00     0.01
     3   0.0000      0.00     0.03       0.00     0.17
     4   0.0928      0.00    -0.33       0.00    -0.03
     5   0.0928      0.00    -0.27       0.00    -0.24
     6   0.0928      0.00    -0.10       0.00    -0.26
     7   0.7644      0.00    -0.03       0.00    -0.14
     8   0.7644      0.00    -0.19       0.00    -0.04
     9   0.7644      0.00    -0.19       0.00    -0.13
    10   0.7644      0.00    -0.22       0.00     0.09
    11   0.7644      0.00    -0.23       0.00     0.09
    12   5.9851      0.00     0.25       0.00     0.07
    13   5.9851      0.00     0.22       0.00     0.16
    14   5.9961      0.00     0.28       0.00    -0.11
    15   5.9961      0.00     0.41       0.00     0.09
    16   6.9959      0.00     0.33       0.00    -0.00
    17   7.0255      0.00    -0.22       0.00     0.00
    18   7.0255      0.00     0.60       0.00    -0.07
    19   7.0255      0.00     0.12       0.00     0.10
    20   7.0256      0.00     0.11       0.00    -0.02
    21   8.0470      0.00    -0.12       0.00     0.23
    22   8.0767      0.00    -0.05       0.00     0.21
    23   8.0767      0.00    -0.05       0.00     0.18
    24   8.0768      0.00     0.20       0.00     0.22
    25   9.0515      0.00    -0.10       0.00     0.13
    26   9.0600      0.00     0.07       0.00    -0.02
    27   9.0600      0.00    -0.11       0.00    -0.04
    28   9.0651      0.00    -0.16       0.00    -0.07
    29   9.0816      0.00    -0.17       0.00    -0.02
    30  16.0086      0.00    -0.08       0.00    -0.22
    31  16.0086      0.00     0.12       0.00    -0.06
    32  16.0087      0.00     0.07       0.00    -0.15
    33  16.0361      0.00    -0.17       0.00    -0.10
    34  16.0361      0.00    -0.07       0.00    -0.13
    35  16.0361      0.00    -0.15       0.00     0.03
    36  16.0362      0.00    -0.23       0.00     0.09

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.

11BT163    quality flag:3

Type:     12:5EEEEEE12:5EEEEEE12:5EEEEEE

axisobj        54.116    54.117    54.116
ecceobj         0.340     0.340     0.340
incobj         32.691    32.691    32.691
qmin           32.711    32.710    32.713
qmax           76.130    76.135    76.126
amean          53.971    53.972    53.971
amin           53.414    53.414    53.414
amax           54.706    54.705    54.708
emean           0.357     0.358     0.357
emin            0.315     0.315     0.315
emax            0.394     0.394     0.394
imean          33.167    33.163    33.171
imin           31.915    31.914    31.917
imax           34.430    34.426    34.436
excite_mean     0.654     0.654     0.654
fracstop        1.000     1.000     1.000
cjmean          2.649     2.649     2.649

libcent 0       171.1     169.7     173.2
libamp  0       107.7     108.0     110.9
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       213.7     213.6     213.7
kozaiamp        103.4     103.2     103.5