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 Mon Dec 11 02:37:44 2017
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   20
# Arc:   3.15y
# First observation: 2011/01/30
#  Last observation: 2014/03/24
Preliminary a, adot, b, bdot, g, gdot:
   0.000022   0.021008   0.000003   0.001507   0.022890   0.000000
# Chi-squared of fit:    18.59 DOF:   34 RMS:  0.17
# Min/Max residuals:    -0.34    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.624434E-05  2.105508E-02  2.285803E-06  1.513669E-03  2.279879E-02  1.055058E-03
# Covariance matrix:
  1.7757E-13 -1.1873E-13  7.2984E-16 -4.6862E-15  3.9037E-15 -1.0671E-12
 -1.1873E-13  1.1212E-12 -1.0899E-14  7.4569E-14  1.4773E-12  1.7351E-11
  7.2984E-16 -1.0899E-14  1.6837E-13 -6.6557E-14 -1.2765E-14 -1.8196E-13
 -4.6862E-15  7.4569E-14 -6.6557E-14  5.1049E-14  9.0841E-14  1.2352E-12
  3.9037E-15  1.4773E-12 -1.2765E-14  9.0841E-14  2.9044E-12  2.1403E-11
 -1.0671E-12  1.7351E-11 -1.8196E-13  1.2352E-12  2.1403E-11  2.8666E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.102339  141.903411    0.202228   -0.035479   -0.966616  2455591.849966
# Heliocentric elements and errors
Epoch:              2455590.5000  =  2011/01/29
Mean Anomaly:          117.07632 +/-     0.405
Argument of Peri:      210.91454 +/-     0.403
Long of Asc Node:      168.18556 +/-     0.003
Inclination:             4.59536 +/-     0.001
Eccentricity:         0.05453039 +/-    0.0007
Semi-Major Axis:     43.64303321 +/-    0.0079
Time of Perihelion: 2421342.3292 +/-     118.2
Perihelion:          41.26316175 +/-    0.0309
Aphelion:            46.02290466 +/-    0.0312
Period (y)              288.3239 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.12764577 +/-    0.0026
Ecliptic Y           27.79900025 +/-    0.0020
Ecliptic Z           -1.60897525 +/-    0.0001
Ecliptic XDOT        -0.00166599 +/-    0.0000
Ecliptic YDOT        -0.00190150 +/-    0.0000
Ecliptic ZDOT         0.00017701 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.82549178 +/-    0.0024
Geocenter to KBO     43.86198562 +/-    0.0033
# 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.

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    -0.34       0.00    -0.25
  2   0.0000     -0.78    -0.11       0.38     0.12
  3   0.0086   -216.74     0.12       1.02    -0.11
  4   0.0087   -219.17    -0.13       0.99    -0.14
  5   0.0088   -219.95     0.15       1.10    -0.02
  6   0.0111   -278.02    -0.01       1.68     0.16
  7   0.0113   -284.88     0.03       1.65     0.13
  8   0.0114   -285.82     0.18       1.69     0.17
  9   1.0405   3308.65     0.24     321.19    -0.29
 10   2.0264   8006.78    -0.12     629.13    -0.13
 11   2.0265   8004.35    -0.17     629.59     0.32
 12   2.0916   6373.29    -0.02     659.91     0.09
 13   2.0916   6372.70     0.33     659.91     0.08
 14   2.0917   6371.18    -0.25     659.69    -0.17
 15   2.0917   6370.54     0.06     660.12     0.24
 16   2.9871  13323.16     0.10     935.51     0.02
 17   2.9872  13320.82     0.04     935.26    -0.22
 18   3.0800  10992.90     0.02     964.01    -0.03
 19   3.1346   9752.54    -0.25    1003.91    -0.13
 20   3.1456   9537.28     0.12    1014.01     0.15

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        43.777    43.801    43.753
ecceobj         0.055     0.055     0.055
incobj          4.596     4.596     4.596
qmin           40.266    40.366    39.233
qmax           47.586    47.523    48.641
amean          43.786    43.810    43.729
amin           43.429    43.469    43.331
amax           44.154    44.177    44.172
emean           0.061     0.059     0.079
emin            0.044     0.043     0.047
emax            0.078     0.076     0.102
imean           4.712     4.729     4.575
imin            4.009     4.011     3.616
imax            5.431     5.442     5.448
excite_mean     0.102     0.102     0.112
fracstop        1.000     1.000     1.000
cjmean          3.086     3.087     3.083

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       184.6     186.7     183.5
kozaiamp        180.0     179.9     180.0