Orbit Fit and Astrometric record for 11UR412

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: 11UR412   
# Created Tue Dec 12 02:37:46 2017
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   20
# Arc:   1.44y
# First observation: 2011/08/30
#  Last observation: 2013/02/06
Preliminary a, adot, b, bdot, g, gdot:
  -0.000208   0.031765   0.000022   0.009652   0.028016   0.000000
# Chi-squared of fit:     6.78 DOF:   34 RMS:  0.10
# Min/Max residuals:    -0.19    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.726837E-05  3.148940E-02  5.280828E-06  9.642291E-03  2.810159E-02 -4.334885E-03
# Covariance matrix:
  4.2223E-13  3.4898E-13 -5.1729E-14  3.1909E-13  5.7274E-13  2.4857E-11
  3.4898E-13  1.7691E-12 -1.3801E-13  9.0310E-13  1.2182E-12  7.1395E-11
 -5.1729E-14 -1.3801E-13  1.4983E-13 -2.4508E-13 -1.2310E-13 -7.0806E-12
  3.1909E-13  9.0310E-13 -2.4508E-13  9.6910E-13  7.8101E-13  4.6540E-11
  5.7274E-13  1.2182E-12 -1.2310E-13  7.8101E-13  1.2335E-12  6.1276E-11
  2.4857E-11  7.1395E-11 -7.0806E-12  4.6540E-11  6.1276E-11  3.6831E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    5.064481   32.295108    0.832509    0.049933   -0.563793  2455804.003996
# Heliocentric elements and errors
Epoch:              2455800.5000  =  2011/08/27
Mean Anomaly:          341.18059 +/-     0.148
Argument of Peri:       53.69593 +/-     0.339
Long of Asc Node:       15.25024 +/-     0.001
Inclination:            17.84189 +/-     0.001
Eccentricity:         0.31985634 +/-    0.0013
Semi-Major Axis:     50.54331469 +/-    0.0477
Time of Perihelion: 2462661.6595 +/-      53.2
Perihelion:          34.37671504 +/-    0.0754
Aphelion:            66.70991435 +/-    0.0927
Period (y)              359.3385 +/-      0.51
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.88957033 +/-    0.0012
Ecliptic Y           18.53812117 +/-    0.0007
Ecliptic Z            3.14155643 +/-    0.0001
Ecliptic XDOT        -0.00206799 +/-    0.0000
Ecliptic YDOT         0.00232966 +/-    0.0000
Ecliptic ZDOT         0.00089853 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.16209159 +/-    0.0011
Geocenter to KBO     35.58517132 +/-    0.0014
# Hcoef:  8.84

The following table shows the complete astrometric record for 11UR412. 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 (11UR412) followed by the observatory code and reference code for the source of the astrometry.

2011 08  30.50323  01 53 09.341  +17 01 08.04  24.2r 11UR412   568  C~1CKy      
2011 08  30.54972  01 53 09.190  +17 01 08.09  24.6r 11UR412   568  C~1CKy      
2011 08  30.59613  01 53 09.063  +17 01 07.93  24.2r 11UR412   568  C~1CKy      
2011 10  25.34656  01 48 48.940  +16 46 57.35  24.1r 11UR412   568  C~1CKy      
2011 10  25.39635  01 48 48.666  +16 46 55.96  24.0r 11UR412   568  C~1CKy      
2011 10  25.40523  01 48 48.626  +16 46 55.73  24.0r 11UR412   568  C~1CKy      
2011 10  26.29551  01 48 43.666  +16 46 33.78  24.3r 11UR412   568  C~1CKy      
2011 10  26.30517  01 48 43.615  +16 46 33.48  23.9r 11UR412   568  C~1CKy      
2011 10  26.34841  01 48 43.365  +16 46 32.51  24.4r 11UR412   568  C~1CKy      
2011 10  26.39151  01 48 43.121  +16 46 31.28  24.3r 11UR412   568  C~1CKy      
2011 10  31.39702  01 48 15.390  +16 44 25.77  23.9r 11UR412   568  C~1CKy      
2011 11  24.25792  01 46 13.820  +16 34 23.00  24.6r 11UR412   568  C~1CKy      
2011 11  26.47841  01 46 03.966  +16 33 30.10  24.4r 11UR412   568  C~1CKy      
2012 01  26.30218  01 44 33.141  +16 22 32.81  23.9r 11UR412   568  C~1CKy      
2012 01  27.23615  01 44 34.862  +16 22 38.87  24.5r 11UR412   568  C~1CKy      
2012 08  17.57715  01 59 55.442  +18 09 30.67  24.8r 11UR412   568  C~1CKy      
2012 08  24.53489  01 59 42.372  +18 10 06.59        11UR412   568  C~1CKy      
2012 10  17.38245  01 55 51.230  +18 00 13.10  24.2r 11UR412   568  C~1CKy      
2012 10  20.47747  01 55 33.856  +17 59 02.60  24.1r 11UR412   568  C~1CKy      
2013 02  06.26716  01 51 06.930  +17 32 53.62        11UR412   568  C~1CKy      

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     0.09       0.00     0.03
  2   0.0001     -2.01    -0.04       0.81     0.23
  3   0.0003     -3.77     0.07       1.30     0.11
  4   0.1529  -3796.75    -0.11     528.38     0.08
  5   0.1530  -3800.93    -0.06     528.48    -0.12
  6   0.1531  -3801.54     0.08     528.47    -0.18
  7   0.1555  -3875.95    -0.05     533.39    -0.05
  8   0.1555  -3876.74    -0.02     533.37    -0.12
  9   0.1556  -3880.44    -0.06     533.75    -0.01
 10   0.1558  -3884.15    -0.12     533.85    -0.16
 11   0.1695  -4301.17    -0.04     558.90     0.06
 12   0.2348  -6149.37     0.03     622.85     0.02
 13   0.2409  -6300.73     0.01     624.49    -0.05
 14   0.4074  -7758.08     0.12     482.93    -0.01
 15   0.4099  -7732.76     0.10     479.61     0.09
 16   0.9667   6873.14     0.10    1829.80     0.23
 17   0.9857   6710.35     0.05    1927.54     0.12
 18   1.1331   3410.54    -0.18    2510.66    -0.05
 19   1.1416   3153.57     0.08    2530.95    -0.19
 20   1.4395   -968.08    -0.05    2401.80    -0.00

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.

11UR412    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        50.670    50.783    50.562
ecceobj         0.321     0.324     0.318
incobj         17.824    17.824    17.824
qmin           33.278    33.210    33.175
qmax           68.582    68.095    67.445
amean          50.389    50.028    49.942
amin           49.595    49.358    49.307
amax           51.171    51.044    50.694
emean           0.316     0.312     0.313
emin            0.292     0.290     0.291
emax            0.340     0.339     0.334
imean          17.846    17.855    17.481
imin           16.759    16.712    16.329
imax           18.966    18.792    18.490
excite_mean     0.440     0.438     0.434
fracstop        1.000     1.000     1.000
cjmean          2.933     2.932     2.936

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       177.6     172.6     173.8
kozaiamp        179.9     179.9     179.9