Orbit Fit and Astrometric record for 11BR163

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: 11BR163   
# Created Tue Oct 24 01:37:56 2017
# Orbit generated from Bernstein formalism
# Fitting   25 observations of   25
# Arc:   3.16y
# First observation: 2011/01/27
#  Last observation: 2014/03/25
Preliminary a, adot, b, bdot, g, gdot:
   0.000104   0.031893   0.000057   0.013894   0.026884   0.000000
# Chi-squared of fit:    55.46 DOF:   44 RMS:  0.26
# Min/Max residuals:    -1.44    0.39
# Exact a, adot, b, bdot, g, gdot:
  1.819225E-05  3.214015E-02  7.392759E-06  1.400118E-02  2.706369E-02 -2.047270E-04
# Covariance matrix:
  2.1496E-13 -2.4648E-13  3.3574E-14 -8.3277E-14 -7.4714E-14 -1.9178E-12
 -2.4648E-13  5.4264E-13 -9.2979E-14  2.3062E-13  1.8971E-13  5.3209E-12
  3.3574E-14 -9.2979E-14  1.6808E-13 -1.1242E-13 -2.9166E-14 -1.0183E-12
 -8.3277E-14  2.3062E-13 -1.1242E-13  1.6034E-13  7.2527E-14  2.5255E-12
 -7.4714E-14  1.8971E-13 -2.9166E-14  7.2527E-14  4.2603E-13  1.4583E-12
 -1.9178E-12  5.3209E-12 -1.0183E-12  2.5255E-12  1.4583E-12  5.8633E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.166204  124.969668   -0.035976    0.140203   -0.976994  2455588.852096
# Heliocentric elements and errors
Epoch:              2455580.5000  =  2011/01/19
Mean Anomaly:          359.84771 +/-     0.006
Argument of Peri:       20.03465 +/-     0.033
Long of Asc Node:      107.39331 +/-     0.000
Inclination:            24.77200 +/-     0.000
Eccentricity:         0.60954888 +/-    0.0001
Semi-Major Axis:     97.12643631 +/-    0.0291
Time of Perihelion: 2455728.4030 +/-       6.2
Perihelion:          37.92312562 +/-    0.0156
Aphelion:           156.32974699 +/-    0.0481
Period (y)              957.2258 +/-      0.43
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -21.55437221 +/-    0.0005
Ecliptic Y           30.75898599 +/-    0.0007
Ecliptic Z            5.24880000 +/-    0.0001
Ecliptic XDOT        -0.00253837 +/-    0.0000
Ecliptic YDOT        -0.00203909 +/-    0.0000
Ecliptic ZDOT         0.00139911 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.92434683 +/-    0.0007
Geocenter to KBO     36.94988235 +/-    0.0009
# Hcoef:  6.24

The following table shows the complete astrometric record for 11BR163. 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 (11BR163) followed by the observatory code and reference code for the source of the astrometry.

2011 01  27.35133  08 38 05.079  +26 56 05.99  21.8r 11BR163   F51  C~1w3m      
2011 01  27.37872  08 38 04.906  +26 56 06.78  21.6r 11BR163   F51  C~1w3m      
2011 01  27.39186  08 38 04.842  +26 56 06.96  21.8r 11BR163   F51  C~1w3m      
2011 01  28.52360  08 37 58.465  +26 56 37.98  21.9g 11BR163   F51  C~1w3m      
2011 01  30.46697  08 37 47.644  +26 57 30.50  21.9w 11BR163   F51  C~1w3m      
2011 01  30.48218  08 37 47.566  +26 57 30.96  22.0w 11BR163   F51  C~1w3m      
2012 01  23.52820  08 47 23.385  +27 11 18.24  22.1g 11BR163   F51  C~1w3m      
2012 01  23.54033  08 47 23.335  +27 11 17.39  22.4g 11BR163   F51  C~1w3m      
2012 01  25.52300  08 47 12.343  +27 12 17.64  21.6r 11BR163   F51  C~1w3m      
2012 01  25.53506  08 47 12.265  +27 12 17.86  21.7r 11BR163   F51  C~1w3m      
2012 02  13.27209  08 45 28.940  +27 20 35.91  21.6i 11BR163   F51  C~1w3m      
2012 02  13.30399  08 45 28.774  +27 20 36.77  21.9w 11BR163   F51  C~1w3m      
2012 02  13.31851  08 45 28.697  +27 20 37.08  21.9w 11BR163   F51  C~1w3m      
2012 02  13.33305  08 45 28.612  +27 20 37.47  21.9w 11BR163   F51  C~1w3m      
2012 02  13.34765  08 45 28.536  +27 20 37.84  21.8w 11BR163   F51  C~1w3m      
2012 02  15.45851  08 45 17.309  +27 21 25.92  21.7i 11BR163   F51  C~1w3m      
2012 11  01.60973  08 59 51.657  +26 46 11.76  21.6i 11BR163   F51  C~1w3m      
2013 01  03.56621  08 58 00.396  +27 15 44.65  21.3i 11BR163   F51  C~1w3m      
2013 01  03.57914  08 58 00.348  +27 15 44.78  21.5i 11BR163   F51  C~1w3m      
2013 02  05.34144  08 55 06.683  +27 32 54.04  22.1w 11BR163   F51  C~1w3m      
2014 01  05.57825  09 06 50.281  +27 29 07.05  21.9g 11BR163   F51  C~1w3m      
2014 03  25.24072  09 00 29.539  +27 59 44.42  21.7w 11BR163   F51  C~1w3m      
2014 03  25.25363  09 00 29.509  +27 59 44.61  21.6w 11BR163   F51  C~1w3m      
2014 03  25.26557  09 00 29.459  +27 59 44.55  21.8w 11BR163   F51  C~1w3m      
2014 03  25.27759  09 00 29.434  +27 59 44.60  21.7w 11BR163   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     0.12       0.00     0.16
  2   0.0001     -2.44    -0.11       0.17     0.13
  3   0.0001     -3.31     0.08       0.13    -0.01
  4   0.0032    -93.68    -0.36       8.32    -0.13
  5   0.0085   -246.98     0.11      22.15     0.04
  6   0.0086   -248.11     0.20      22.33     0.12
  7   0.9888   6953.42    -0.18    2854.46    -0.34
  8   0.9889   6953.01     0.39    2853.45    -1.44
  9   0.9943   6795.29    -0.07    2871.30    -0.10
 10   0.9943   6794.22    -0.16    2871.22    -0.26
 11   1.0456   5331.78    -0.05    2976.23     0.13
 12   1.0457   5329.42     0.02    2976.46     0.26
 13   1.0458   5328.35     0.05    2976.48     0.23
 14   1.0458   5327.15    -0.04    2976.55     0.26
 15   1.0458   5326.07    -0.00    2976.63     0.30
 16   1.0516   5168.95    -0.04    2982.55     0.18
 17   1.7639  17007.74    -0.05    4272.62    -0.07
 18   1.9362  15052.43    -0.01    5529.88     0.37
 19   1.9363  15051.77     0.26    5529.81     0.13
 20   2.0260  12527.75    -0.13    5839.80     0.24
 21   2.9411  21597.71    -0.09    8453.22    -0.01
 22   3.1564  16173.94     0.00    8652.61    -0.09
 23   3.1565  16173.51     0.07    8652.67     0.06
 24   3.1565  16172.89    -0.07    8652.41    -0.11
 25   3.1565  16172.55     0.07    8652.36    -0.07

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.

11BR163    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        98.174    98.265    98.083
ecceobj         0.613     0.614     0.613
incobj         24.747    24.747    24.747
qmin           35.943    36.493    35.938
qmax          163.112   163.175   162.492
amean          97.584    97.569    97.192
amin           95.803    95.785    95.488
amax          100.471   100.276    99.820
emean           0.615     0.615     0.614
emin            0.601     0.603     0.599
emax            0.631     0.627     0.630
imean          22.563    22.634    22.507
imin           21.539    22.290    21.514
imax           23.646    23.404    23.594
excite_mean     0.725     0.725     0.724
fracstop        1.000     1.000     1.000
cjmean          2.929     2.929     2.929

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       115.8      92.1     118.9
kozaiamp         95.7      70.9      99.9