Orbit Fit and Astrometric record for 11JY31

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: 11JY31    
# Created Sun Dec 17 02:37:42 2017
# Orbit generated from Bernstein formalism
# Fitting   57 observations of   59
# Arc:   5.17y
# First observation: 2011/04/28
#  Last observation: 2016/06/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000159   0.023414  -0.000004   0.000740   0.023765   0.000000
# Chi-squared of fit:    22.65 DOF:  108 RMS:  0.11
# Min/Max residuals:    -0.24    0.39
# Exact a, adot, b, bdot, g, gdot:
  1.464531E-05  2.303340E-02  4.156109E-07  7.253123E-04  2.365902E-02 -6.918253E-04
# Covariance matrix:
  5.4704E-14 -2.1196E-14 -1.4335E-17 -5.6474E-16  3.0426E-14 -1.5389E-13
 -2.1196E-14  1.1391E-13 -1.6720E-15  3.9749E-15  6.3285E-14  1.1813E-12
 -1.4335E-17 -1.6720E-15  3.7915E-14 -1.4029E-14 -1.3734E-15 -1.9544E-14
 -5.6474E-16  3.9749E-15 -1.4029E-14  1.5854E-14  1.9751E-15  4.8923E-14
  3.0426E-14  6.3285E-14 -1.3734E-15  1.9751E-15  1.1636E-13  6.1698E-13
 -1.5389E-13  1.1813E-12 -1.9544E-14  4.8923E-14  6.1698E-13  1.4482E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.863015  -82.451216    0.876189    0.016302   -0.501959  2455679.794646
# Heliocentric elements and errors
Epoch:              2455670.5000  =  2011/04/19
Mean Anomaly:          301.27031 +/-     0.068
Argument of Peri:      109.68454 +/-     0.087
Long of Asc Node:      231.50353 +/-     0.005
Inclination:             2.60794 +/-     0.000
Eccentricity:         0.05979512 +/-    0.0001
Semi-Major Axis:     44.02597688 +/-    0.0023
Time of Perihelion: 2473077.2291 +/-      20.2
Perihelion:          41.39343823 +/-    0.0069
Aphelion:            46.65851552 +/-    0.0070
Period (y)              292.1270 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            4.75172788 +/-    0.0001
Ecliptic Y          -42.49160289 +/-    0.0006
Ecliptic Z            1.37413536 +/-    0.0000
Ecliptic XDOT         0.00262959 +/-    0.0000
Ecliptic YDOT         0.00043813 +/-    0.0000
Ecliptic ZDOT         0.00008132 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.77853997 +/-    0.0006
Geocenter to KBO     42.26716995 +/-    0.0006
# Hcoef:  8.82

The following table shows the complete astrometric record for 11JY31. 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 (11JY31) followed by the observatory code and reference code for the source of the astrometry.

2011 04  28.29388  18 32 25.22   -21 21 50.9         11JY31    268  C~0mPC      
2011 04  28.39916  18 32 25.00   -21 21 50.9         11JY31    268  C~0mPC      
2011 04  30.29847  18 32 21.06   -21 21 48.6         11JY31    268  C~0mPC      
2011 04  30.29915  18 32 21.06   -21 21 48.7         11JY31    268  C~0mPC      
2011 05  04.35789  18 32 11.59   -21 21 45.2         11JY31    268  C~0mPC      
2011 05  04.38104  18 32 11.52   -21 21 45.1         11JY31    268  C~0mPC      
2011 05  04.39888  18 32 11.48   -21 21 45.2         11JY31    268  C~0mPC      
2011 05  04.40573  18 32 11.46   -21 21 45.1         11JY31    268  C~0mPC      
2011 05  04.42148  18 32 11.43   -21 21 45.2         11JY31    268  C~0mPC      
2011 05  27.28690  18 30 54.35   -21 21 51.6         11JY31    268  C~0mPC      
2011 05  27.28768  18 30 54.35   -21 21 51.6         11JY31    268  C~0mPC      
2011 05  29.40904  18 30 45.50   -21 21 54.6         11JY31    266  C~0mPC      
2011 05  29.54954  18 30 44.90   -21 21 54.8         11JY31    266  C~0mPC      
2011 05  30.41081  18 30 41.24   -21 21 55.9         11JY31    266  C~0mPC      
2011 05  30.47860  18 30 40.95   -21 21 56.0         11JY31    266  C~0mPC      
2011 05  30.54565  18 30 40.65   -21 21 56.2         11JY31    266  C~0mPC      
2011 05  31.22732  18 30 37.71   -21 21 57.0         11JY31    268  C~0mPC      
2011 05  31.22801  18 30 37.71   -21 21 57.0         11JY31    268  C~0mPC      
2011 05  31.29595  18 30 37.42   -21 21 57.1         11JY31    268  C~0mPC      
2011 05  31.29705  18 30 37.41   -21 21 57.1         11JY31    268  C~0mPC      
2011 05  31.37286  18 30 37.07   -21 21 57.3         11JY31    268  C~0mPC      
2011 05  31.37355  18 30 37.07   -21 21 57.3         11JY31    268  C~0mPC      
2011 05  31.53716  18 30 36.36   -21 21 57.6         11JY31    266  C~0mPC      
2011 06  01.43469  18 30 32.44   -21 21 58.7         11JY31    266  C~0mPC      
2011 06  01.51361  18 30 32.11   -21 21 59.1         11JY31    266  C~0mPC      
2011 07  01.12040  18 28 08.92   -21 23 10.8         11JY31    269  C~0mPC      
2011 07  01.12099  18 28 08.92   -21 23 10.8         11JY31    269  C~0mPC      
2011 07  01.20571  18 28 08.48   -21 23 11.0         11JY31    269  C~0mPC      
2011 07  01.20630  18 28 08.49   -21 23 11.2         11JY31    269  C~0mPC      
2011 07  01.29082  18 28 08.04   -21 23 11.3   24.8R 11JY31    269  C~0mPC      
2011 07  01.29141  18 28 08.05   -21 23 11.4         11JY31    269  C~0mPC      
2011 07  02.32100  18 28 02.88   -21 23 14.6         11JY31    266  C~0mPC      
2011 07  02.37545  18 28 02.61   -21 23 14.8         11JY31    266  C~0mPC      
2012 04  17.34199  18 38 18.00   -21 14 50.4         11JY31    268  C~0mPC      
2012 04  17.38720  18 38 17.95   -21 14 50.2         11JY31    268  C~0mPC      
2012 04  17.41592  18 38 17.93   -21 14 50.2         11JY31    268  C~0mPC      
2012 04  18.26755  18 38 17.13   -21 14 48.3         11JY31    268  C~0mPC      
2012 04  18.31485  18 38 17.08   -21 14 48.3         11JY31    268  C~0mPC      
2012 04  18.36265  18 38 17.03   -21 14 48.2         11JY31    268  C~0mPC      
2012 04  18.40528  18 38 16.98   -21 14 48.1         11JY31    268  C~0mPC      
2012 04  19.30535  18 38 16.05   -21 14 46.3         11JY31    268  C~0mPC      
2012 04  19.35214  18 38 16.00   -21 14 46.1         11JY31    268  C~0mPC      
2012 04  19.39905  18 38 15.94   -21 14 46.1         11JY31    268  C~0mPC      
2012 09  18.64857  18 29 31.07   -21 21 20.7   24.8R 11JY31    250  S~0sHv      
2012 09  18.65704  18 29 31.07   -21 21 20.7         11JY31    250  S~0sHv      
2012 09  18.70856  18 29 31.06   -21 21 20.9         11JY31    250  S~0sHv      
2012 09  18.71703  18 29 31.06   -21 21 20.9         11JY31    250  S~0sHv      
2012 09  18.78152  18 29 31.06   -21 21 21.1         11JY31    250  S~0sHv      
2012 09  18.78999  18 29 31.06   -21 21 21.0         11JY31    250  S~0sHv      
2012 09  18.84353  18 29 31.05   -21 21 21.2         11JY31    250  S~0sHv      
2012 09  18.85200  18 29 31.05   -21 21 21.2         11JY31    250  S~0sHv      
2014 06  25.35404  18 45 45.278  -20 59 58.97        11JY31    266  C~2Gt7      
2014 06  25.40771  18 45 45.007  -20 59 59.27        11JY31    266  C~2Gt7      
2014 06  25.42538  18 45 44.919  -20 59 59.38        11JY31    266  C~2Gt7      
2014 06  25.43398  18 45 44.874  -20 59 59.45        11JY31    266  C~2Gt7      
2014 06  25.53073  18 45 44.385  -20 59 59.85        11JY31    266  C~2Gt7      
2014 06  25.54838  18 45 44.290  -20 59 59.95        11JY31    266  C~2Gt7      
2016 06  30.39446  18 56 44.372  -20 41 35.51        11JY31    266  C~2Gt7      
2016 06  30.40165  18 56 44.333  -20 41 35.43        11JY31    266  C~2Gt7      

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     0.15       0.00     0.01
  2   0.0003     -3.07     0.11       0.17    -0.11
  3   0.0055    -57.89    -0.05       5.55     0.04
  4   0.0055    -57.90    -0.04       5.45    -0.06
  5   0.0166   -189.79     0.03      16.34    -0.07
  6   0.0167   -190.76    -0.10      16.49     0.02
  7   0.0167   -191.32    -0.02      16.43    -0.10
  8   0.0167   -191.59    -0.05      16.54    -0.01
  9   0.0168   -192.02     0.10      16.47    -0.13
 10   0.0794  -1267.52    -0.14      69.00     0.06
 11   0.0794  -1267.52    -0.09      69.00     0.06
 12   0.0852  -1391.14    -0.05      72.63    -0.08
 13   0.0856  -1399.52     0.05      72.88    -0.08
 14   0.0879  -1450.64     0.06      74.51     0.01
 15   0.0881  -1454.69     0.15      74.63     0.01
 16   0.0883  -1458.88     0.05      74.65    -0.08
 17   0.0902  -1499.94    -0.07      76.05    -0.05
 18   0.0902  -1499.94    -0.03      76.05    -0.05
 19   0.0904  -1503.99     0.11      76.16    -0.05
 20   0.0904  -1504.13     0.03      76.17    -0.05
 21   0.0906  -1508.88    -0.05      76.22    -0.14
 22   0.0906  -1508.88    -0.01      76.22    -0.14
 23   0.0910  -1518.80    -0.08      76.45    -0.02
 24   0.0935  -1573.55    -0.24      78.26     0.27
 25   0.0937  -1578.17     0.07      78.11    -0.02
 26   0.1747  -3579.64    -0.01     108.97    -0.03
 27   0.1747  -3579.64     0.03     108.97    -0.03
 28   0.1750  -3585.79    -0.06     109.07     0.05
 29   0.1750  -3585.66     0.11     108.86    -0.16
 30   0.1752  -3591.94    -0.13     109.07     0.01
 31   0.1752  -3591.81     0.05     108.97    -0.10
 32   0.1780  -3664.11    -0.02     109.32     0.10
 33   0.1782  -3667.89     0.09     109.31     0.08
 34   0.9721   4947.41     0.04     120.15    -0.10
 35   0.9722   4946.73    -0.03     120.39     0.01
 36   0.9723   4946.45     0.08     120.41    -0.06
 37   0.9746   4935.40     0.01     123.04    -0.01
 38   0.9747   4934.71    -0.00     123.09    -0.09
 39   0.9749   4934.01     0.01     123.23    -0.09
 40   0.9750   4933.32    -0.04     123.38    -0.07
 41   0.9774   4920.46    -0.02     126.02    -0.12
 42   0.9776   4919.77     0.05     126.27    -0.01
 43   0.9777   4918.94    -0.02     126.32    -0.10
 44   1.3945  -2427.78     0.03     161.07     0.39
 45   1.3946  -2427.78 (   0.04)    161.07 (   0.41)
 46   1.3947  -2427.93    -0.03     160.88     0.34
 47   1.3947  -2427.93    -0.02     160.88     0.36
 48   1.3949  -2427.94     0.06     160.68     0.31
 49   1.3949  -2427.93 (   0.08)    160.78 (   0.42)
 50   1.3951  -2428.08    -0.01     160.59     0.36
 51   1.3951  -2428.08     0.01     160.59     0.38
 52   3.1596  11263.59    -0.03     563.87    -0.03
 53   3.1598  11259.77    -0.02     563.86    -0.07
 54   3.1598  11258.53     0.00     563.85    -0.09
 55   3.1599  11257.89    -0.02     563.83    -0.12
 56   3.1601  11251.02     0.02     563.96    -0.07
 57   3.1602  11249.68    -0.06     563.96    -0.08
 58   5.1748  20620.44     0.03     874.37    -0.13
 59   5.1748  20619.90     0.01     874.50    -0.01

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.

11JY31    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.837    43.844    43.831
ecceobj         0.059     0.059     0.059
incobj          2.613     2.613     2.613
qmin           40.651    40.656    40.643
qmax           47.665    47.649    47.623
amean          44.045    44.052    44.039
amin           43.704    43.708    43.691
amax           44.409    44.404    44.403
emean           0.059     0.059     0.059
emin            0.043     0.044     0.043
emax            0.074     0.073     0.073
imean           4.232     4.231     4.233
imin            3.589     3.589     3.587
imax            4.845     4.841     4.847
excite_mean     0.095     0.095     0.094
fracstop        1.000     1.000     1.000
cjmean          3.091     3.091     3.091

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       179.1     178.9     179.0
kozaiamp        180.0     179.9     180.0