Orbit Fit and Astrometric record for 11BS163

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: 11BS163   
# Created Tue Feb 20 02:37:43 2018
# Orbit generated from Bernstein formalism
# Fitting   22 observations of   22
# Arc:   9.04y
# First observation: 2005/03/10
#  Last observation: 2014/03/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.000273   0.021352   0.000001   0.001413   0.023698   0.000000
# Chi-squared of fit:    23.80 DOF:   38 RMS:  0.18
# Min/Max residuals:    -0.37    0.40
# Exact a, adot, b, bdot, g, gdot:
  1.439429E-05  2.124126E-02  1.457103E-06  1.405559E-03  2.284471E-02  7.338600E-04
# Covariance matrix:
  7.3239E-13 -1.8970E-13  9.4325E-15 -7.5199E-15 -1.2583E-13 -5.7120E-13
 -1.8970E-13  1.5592E-13 -1.2946E-14  9.3712E-15 -1.2667E-13  7.1084E-13
  9.4325E-15 -1.2946E-14  5.6777E-13 -7.5802E-14  1.3851E-14 -6.3510E-14
 -7.5199E-15  9.3712E-15 -7.5802E-14  1.1823E-14 -7.9338E-15  4.6044E-14
 -1.2583E-13 -1.2667E-13  1.3851E-14 -7.9338E-15  7.9536E-13 -5.9943E-13
 -5.7120E-13  7.1084E-13 -6.3510E-14  4.6044E-14 -5.9943E-13  3.4927E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.588554  133.900227   -0.577482   -0.036169   -0.802128  2453439.733507
# Heliocentric elements and errors
Epoch:              2453430.5000  =  2005/03/01
Mean Anomaly:          105.16877 +/-     0.192
Argument of Peri:      215.86058 +/-     0.172
Long of Asc Node:      168.31767 +/-     0.002
Inclination:             4.57740 +/-     0.000
Eccentricity:         0.04768939 +/-    0.0001
Semi-Major Axis:     43.94193654 +/-    0.0075
Time of Perihelion: 2422349.0339 +/-      56.2
Perihelion:          41.84637235 +/-    0.0077
Aphelion:            46.03750073 +/-    0.0084
Period (y)              291.2909 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -31.29963609 +/-    0.0012
Ecliptic Y           31.68647203 +/-    0.0012
Ecliptic Z           -1.97689833 +/-    0.0001
Ecliptic XDOT        -0.00190040 +/-    0.0000
Ecliptic YDOT        -0.00170355 +/-    0.0000
Ecliptic ZDOT         0.00016437 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.58259589 +/-    0.0012
Geocenter to KBO     43.77381658 +/-    0.0017
# Hcoef:  6.28

The following table shows the complete astrometric record for 11BS163. 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 (11BS163) followed by the observatory code and reference code for the source of the astrometry.

2005 03  10.232764 09 02 23.58   +14 10 30.9         11BS163   645  C~2POP      
2005 03  10.236081 09 02 23.56   +14 10 30.9         11BS163   645  C~2POP      
2011 01  30.34920  09 34 18.649  +12 12 58.41  23.2w 11BS163   F51  C~1w3m      
2011 01  30.36377  09 34 18.607  +12 12 59.02  23.0w 11BS163   F51  C~1w3m      
2011 02  02.50377  09 34 04.665  +12 14 08.77  23.1w 11BS163   F51  C~1w3m      
2011 02  02.53483  09 34 04.507  +12 14 09.52  22.8w 11BS163   F51  C~1w3m      
2011 02  02.55006  09 34 04.459  +12 14 09.88  23.3w 11BS163   F51  C~1w3m      
2011 02  03.38806  09 34 00.719  +12 14 29.01  23.1w 11BS163   F51  C~1w3m      
2011 02  03.48592  09 34 00.275  +12 14 31.18  23.3w 11BS163   F51  C~1w3m      
2011 02  03.50135  09 34 00.215  +12 14 31.52  23.3w 11BS163   F51  C~1w3m      
2012 02  14.39299  09 37 59.270  +12 00 17.55  23.0w 11BS163   F51  C~1w3m      
2013 02  08.50214  09 43 08.417  +11 39 39.63  22.6w 11BS163   F51  C~1w3m      
2013 02  08.53585  09 43 08.271  +11 39 40.86  22.4w 11BS163   F51  C~1w3m      
2013 03  04.30646  09 41 24.126  +11 49 02.46  22.3w 11BS163   F51  C~1w3m      
2013 03  04.32069  09 41 24.088  +11 49 02.66  22.9w 11BS163   F51  C~1w3m      
2013 03  04.33494  09 41 23.985  +11 49 02.94  22.6w 11BS163   F51  C~1w3m      
2013 03  04.34917  09 41 23.954  +11 49 03.56  23.0w 11BS163   F51  C~1w3m      
2014 01  25.39836  09 48 55.693  +11 15 17.20  22.5w 11BS163   F51  C~1w3m      
2014 01  25.43290  09 48 55.538  +11 15 17.74  22.5w 11BS163   F51  C~1w3m      
2014 02  28.30936  09 46 27.368  +11 28 34.30  22.3w 11BS163   F51  C~1w3m      
2014 03  20.26385  09 45 08.801  +11 36 00.40  22.7w 11BS163   F51  C~1w3m      
2014 03  24.28137  09 44 55.225  +11 37 20.71  22.6w 11BS163   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     0.06       0.00    -0.10
  2   0.0000     -0.28    -0.03      -0.08    -0.19
  3   5.8922  28981.37    -0.37    1676.04    -0.15
  4   5.8922  28980.58    -0.14    1676.43     0.23
  5   5.9008  28760.39     0.08    1678.19    -0.01
  6   5.9009  28757.90    -0.18    1678.18    -0.03
  7   5.9009  28757.11     0.11    1678.30     0.08
  8   5.9032  28697.92    -0.05    1679.18     0.27
  9   5.9035  28690.93    -0.01    1679.19     0.23
 10   5.9035  28689.97     0.14    1679.24     0.27
 11   6.9327  32365.11     0.33    1983.87    -0.24
 12   7.9186  37195.36    -0.01    2272.95    -0.15
 13   7.9187  37192.86    -0.05    2273.43     0.31
 14   7.9838  35513.33     0.04    2312.05     0.07
 15   7.9838  35512.72     0.40    2312.06     0.06
 16   7.9839  35511.15    -0.20    2311.83    -0.20
 17   7.9839  35510.50     0.12    2312.28     0.22
 18   8.8793  42698.73     0.10    2559.44    -0.07
 19   8.8794  42696.30     0.04    2559.20    -0.32
 20   8.9721  40282.68    -0.04    2599.26    -0.13
 21   9.0268  38999.97    -0.36    2645.55    -0.23
 22   9.0378  38777.60     0.02    2656.80     0.05

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.

11BS163    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.778    43.800    43.756
ecceobj         0.054     0.054     0.054
incobj          4.597     4.597     4.597
qmin           40.295    40.359    39.172
qmax           47.494    47.480    48.673
amean          43.787    43.809    43.751
amin           43.442    43.459    43.335
amax           44.162    44.180    44.157
emean           0.060     0.059     0.069
emin            0.042     0.043     0.040
emax            0.076     0.076     0.102
imean           4.715     4.729     4.584
imin            4.011     4.013     3.688
imax            5.421     5.442     5.574
excite_mean     0.102     0.101     0.106
fracstop        1.000     1.000     1.000
cjmean          3.087     3.087     3.085

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       185.2     186.6     187.5
kozaiamp        180.0     180.0     180.0