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 Mon Apr 22 01:09:05 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   23 observations of   23
# Arc:   8.02y
# First observation: 2011/01/30
#  Last observation: 2019/02/08
# Chi-squared of fit:    27.32 DOF:   40 RMS:  0.19
# Min/Max residuals:    -0.37    0.66
# Exact a, adot, b, bdot, g, gdot:
  1.840748E-05  3.192258E-02  7.315015E-06  1.222939E-02  2.821396E-02  3.572503E-03
# Covariance matrix:
  2.0873E-13 -1.0331E-13  2.1063E-14 -2.4290E-14  2.7876E-15 -3.0510E-13
 -1.0331E-13  1.0308E-13 -2.6987E-14  3.0917E-14  9.3035E-14  3.8959E-13
  2.1063E-14 -2.6987E-14  1.6188E-13 -5.2004E-14 -2.4780E-14 -1.2938E-13
 -2.4290E-14  3.0917E-14 -5.2004E-14  3.2980E-14  2.7169E-14  1.4842E-13
  2.7876E-15  9.3035E-14 -2.4780E-14  2.7169E-14  6.6360E-13  3.4994E-13
 -3.0510E-13  3.8959E-13 -1.2938E-13  1.4842E-13  3.4994E-13  1.8691E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -5.009215  138.418979    0.142904   -0.085373   -0.974062  2455591.859246
# Heliocentric elements and errors
Epoch:              2455592.5000  =  2011/01/31
Mean Anomaly:            9.13029 +/-     0.005
Argument of Peri:      324.97481 +/-     0.009
Long of Asc Node:      150.70455 +/-     0.000
Inclination:            21.48588 +/-     0.000
Eccentricity:         0.37880223 +/-    0.0001
Semi-Major Axis:     57.48784698 +/-    0.0115
Time of Perihelion: 2451554.7022 +/-       2.3
Perihelion:          35.71132230 +/-    0.0094
Aphelion:            79.26437167 +/-    0.0170
Period (y)              435.8853 +/-      0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -27.04394717 +/-    0.0008
Ecliptic Y           24.18804505 +/-    0.0007
Ecliptic Z           -3.09454047 +/-    0.0001
Ecliptic XDOT        -0.00239281 +/-    0.0000
Ecliptic YDOT        -0.00201310 +/-    0.0000
Ecliptic ZDOT         0.00115194 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.41438868 +/-    0.0007
Geocenter to KBO     35.44340758 +/-    0.0010
# Hcoef:  6.98

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      
2019 02  08.342790 10 18 07.435  +11 06 55.21  22.0G 11BU163   G37  C~2zmc      
2019 02  08.481410 10 18 06.766  +11 07 01.01        11BU163   G37  C~2zmc      

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    -0.13       0.00    -0.06
  2   0.0000      0.00     0.25       0.00     0.01
  3   0.0001      0.00     0.12       0.00     0.16
  4   0.0086      0.00     0.06       0.00     0.05
  5   0.0110      0.00    -0.19       0.00     0.14
  6   0.0110      0.00    -0.22       0.00     0.16
  7   1.0404      0.00     0.12       0.00     0.07
  8   1.0405      0.00     0.12       0.00    -0.03
  9   2.0123      0.00    -0.21       0.00    -0.08
 10   2.0123      0.00     0.01       0.00    -0.06
 11   2.0124      0.00     0.23       0.00    -0.02
 12   2.0124      0.00     0.12       0.00     0.07
 13   2.0888      0.00    -0.23       0.00     0.07
 14   2.9325      0.00    -0.31       0.00    -0.17
 15   2.9325      0.00    -0.07       0.00    -0.02
 16   2.9325      0.00    -0.27       0.00    -0.20
 17   2.9326      0.00     0.43       0.00    -0.30
 18   3.0799      0.00     0.03       0.00     0.01
 19   3.1346      0.00    -0.08       0.00    -0.19
 20   3.1346      0.00     0.19       0.00     0.04
 21   3.1347      0.00    -0.02       0.00     0.10
 22   8.0246      0.00    -0.05       0.00    -0.37
 23   8.0250      0.00     0.06       0.00     0.66

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:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        57.865    57.865    57.865
ecceobj         0.382     0.382     0.382
incobj         21.475    21.475    21.475
qmin           34.112    34.122    34.157
qmax           83.062    83.063    82.971
amean          57.861    57.918    57.759
amin           57.034    57.086    56.999
amax           58.949    58.966    59.023
emean           0.384     0.385     0.384
emin            0.361     0.364     0.362
emax            0.411     0.411     0.410
imean          20.150    20.106    20.130
imin           19.026    18.864    19.118
imax           21.224    21.192    21.177
excite_mean     0.516     0.517     0.516
fracstop        1.000     1.000     1.000
cjmean          2.923     2.923     2.922

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       173.5     174.1     168.8
kozaiamp        180.0     180.0     180.0