Orbit Fit and Astrometric record for 11BU163

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: 11BU163   
# Created Tue Oct 17 01:37:55 2017
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   21
# Arc:   3.13y
# First observation: 2011/01/30
#  Last observation: 2014/03/20
Preliminary a, adot, b, bdot, g, gdot:
   0.000105   0.031537   0.000050   0.012070   0.027998   0.000000
# Chi-squared of fit:    10.64 DOF:   34 RMS:  0.13
# Min/Max residuals:    -0.29    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.823545E-05  3.192294E-02  7.622687E-06  1.222935E-02  2.821377E-02  3.577716E-03
# Covariance matrix:
  2.2831E-13 -2.0038E-13  1.1024E-14 -4.8621E-14 -7.3365E-14 -1.3258E-12
 -2.0038E-13  7.4629E-13 -6.1908E-14  2.7383E-13  5.8757E-13  7.4805E-12
  1.1024E-14 -6.1908E-14  2.1126E-13 -1.0342E-13 -4.6887E-14 -6.6741E-13
 -4.8621E-14  2.7383E-13 -1.0342E-13  1.5550E-13  2.1012E-13  2.9496E-12
 -7.3365E-14  5.8757E-13 -4.6887E-14  2.1012E-13  1.0443E-12  5.7865E-12
 -1.3258E-12  7.4805E-12 -6.6741E-13  2.9496E-12  5.7865E-12  8.0534E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -5.009215  138.418979    0.142904   -0.085373   -0.974062  2455591.859246
# Heliocentric elements and errors
Epoch:              2455590.5000  =  2011/01/29
Mean Anomaly:            9.13409 +/-     0.020
Argument of Peri:      324.94808 +/-     0.050
Long of Asc Node:      150.70470 +/-     0.000
Inclination:            21.48557 +/-     0.000
Eccentricity:         0.37892980 +/-    0.0002
Semi-Major Axis:     57.49700686 +/-    0.0122
Time of Perihelion: 2451550.0576 +/-       8.8
Perihelion:          35.70967758 +/-    0.0116
Aphelion:            79.28433614 +/-    0.0190
Period (y)              435.9895 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -27.04412468 +/-    0.0010
Ecliptic Y           24.18821069 +/-    0.0008
Ecliptic Z           -3.09455080 +/-    0.0001
Ecliptic XDOT        -0.00239323 +/-    0.0000
Ecliptic YDOT        -0.00201280 +/-    0.0000
Ecliptic ZDOT         0.00115190 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.41470116 +/-    0.0009
Geocenter to KBO     35.44369012 +/-    0.0013
# Hcoef:  7.01

The following table shows the complete astrometric record for 11BU163. 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 (11BU163) followed by the observatory code and reference code for the source of the astrometry.

2011 01  30.35848  09 17 07.969  +10 32 14.58  23.2w 11BU163   F51  C~1w3m      
2011 01  30.37410  09 17 07.912  +10 32 15.12  22.9w 11BU163   F51  C~1w3m      
2011 01  30.38863  09 17 07.826  +10 32 15.71  22.9w 11BU163   F51  C~1w3m      
2011 02  02.49819  09 16 51.538  +10 33 50.63  22.8w 11BU163   F51  C~1w3m      
2011 02  03.36693  09 16 46.971  +10 34 17.61  23.3w 11BU163   F51  C~1w3m      
2011 02  03.38238  09 16 46.886  +10 34 18.11  22.8w 11BU163   F51  C~1w3m      
2012 02  14.37672  09 23 46.625  +10 46 35.00  23.0w 11BU163   F51  C~1w3m      
2012 02  14.39091  09 23 46.550  +10 46 35.36  23.2w 11BU163   F51  C~1w3m      
2013 02  03.34857  09 32 33.139  +10 46 44.89  22.5w 11BU163   F51  C~1w3m      
2013 02  03.36319  09 32 33.077  +10 46 45.38  22.5w 11BU163   F51  C~1w3m      
2013 02  03.37792  09 32 33.015  +10 46 45.89  22.8w 11BU163   F51  C~1w3m      
2013 02  03.39252  09 32 32.931  +10 46 46.45  22.5w 11BU163   F51  C~1w3m      
2013 03  03.30882  09 30 11.711  +11 02 05.41  22.8w 11BU163   F51  C~1w3m      
2014 01  05.43799  09 42 35.481  +10 37 52.08  22.3w 11BU163   F51  C~1w3m      
2014 01  05.45309  09 42 35.439  +10 37 52.58  22.3w 11BU163   F51  C~1w3m      
2014 01  05.46826  09 42 35.368  +10 37 52.75  22.0w 11BU163   F51  C~1w3m      
2014 01  05.48344  09 42 35.356  +10 37 53.00  22.3w 11BU163   F51  C~1w3m      
2014 02  28.30607  09 38 17.352  +11 05 18.10  22.7w 11BU163   F51  C~1w3m      
2014 03  20.26385  09 36 49.435  +11 15 48.79  22.5w 11BU163   F51  C~1w3m      
2014 03  20.27568  09 36 49.407  +11 15 49.36  22.4w 11BU163   F51  C~1w3m      
2014 03  20.30093  09 36 49.294  +11 15 50.17  22.7w 11BU163   F51  C~1w3m      

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    -0.16
  2   0.0000     -0.96     0.27       0.26     0.02
  3   0.0001     -2.35     0.10       0.44     0.12
  4   0.0086   -260.00     0.07      18.24     0.00
  5   0.0110   -332.35    -0.19      23.59     0.01
  6   0.0110   -333.70    -0.23      23.69     0.02
  7   1.0404   5335.20     0.05    2613.61     0.07
  8   1.0405   5334.03     0.08    2613.62    -0.04
  9   2.0123  12722.69    -0.18    5043.26    -0.14
 10   2.0123  12721.66     0.02    5043.44    -0.05
 11   2.0124  12720.63     0.22    5043.63     0.06
 12   2.0124  12719.27     0.08    5043.78     0.11
 13   2.0888  10448.26    -0.29    5262.87     0.00
 14   2.9325  21375.20    -0.11    7384.90    -0.19
 15   2.9325  21374.44     0.07    7385.17     0.03
 16   2.9325  21373.38    -0.06    7384.99    -0.21
 17   2.9326  21373.13 (   0.63)   7385.17 (  -0.08)
 18   3.0799  17207.19     0.06    7719.80     0.10
 19   3.1346  15770.05    -0.02    7904.11    -0.11
 20   3.1346  15769.48     0.16    7904.52     0.18
 21   3.1347  15767.63    -0.05    7904.76     0.18

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.

11BU163    quality flag:2

Type:       SCATNEAR  8:3EEEEE  SCATNEAR

axisobj        57.875    57.913    57.837
ecceobj         0.383     0.383     0.382
incobj         21.475    21.475    21.475
qmin           34.465    34.972    34.224
qmax           82.669    82.179    82.789
amean          57.949    57.900    57.828
amin           57.096    57.083    57.061
amax           58.956    58.887    58.972
emean           0.381     0.384     0.381
emin            0.359     0.371     0.357
emax            0.406     0.396     0.405
imean          20.504    20.253    20.293
imin           19.523    19.914    19.053
imax           21.348    20.618    21.288
excite_mean     0.517     0.517     0.515
fracstop        1.000     1.000     1.000
cjmean          2.923     2.923     2.924

libcent 0      -180.0     177.5    -180.0
libamp  0      -180.0     151.2    -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       171.5     176.8     166.2
kozaiamp        179.9     180.0     179.9