Orbit Fit and Astrometric record for 11US412

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: 11US412   
# Created Sun Oct 22 01:37:59 2017
# Orbit generated from Bernstein formalism
# Fitting   16 observations of   16
# Arc:   1.45y
# First observation: 2011/08/29
#  Last observation: 2013/02/09
Preliminary a, adot, b, bdot, g, gdot:
  -0.000167   0.020177   0.000003   0.000806   0.021652   0.000000
# Chi-squared of fit:     4.89 DOF:   26 RMS:  0.10
# Min/Max residuals:    -0.19    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.385711E-05  1.999954E-02  4.109098E-08  8.078732E-04  2.169190E-02 -2.839469E-03
# Covariance matrix:
  1.0511E-12  2.3822E-13 -1.8097E-14  7.6789E-14  1.2541E-12  6.3628E-11
  2.3822E-13  5.9076E-13 -9.4643E-15  4.1676E-14  6.2967E-13  3.4999E-11
 -1.8097E-14 -9.4643E-15  1.8604E-13 -1.8994E-13 -2.7105E-14 -1.5996E-12
  7.6789E-14  4.1676E-14 -1.8994E-13  3.8211E-13  1.1744E-13  7.5290E-12
  1.2541E-12  6.2967E-13 -2.7105E-14  1.1744E-13  1.8364E-12  9.8059E-11
  6.3628E-11  3.4999E-11 -1.5996E-12  7.5290E-12  9.8059E-11  6.4660E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.165404   32.332236    0.841705    0.011216   -0.552531  2455803.089696
# Heliocentric elements and errors
Epoch:              2455800.5000  =  2011/08/27
Mean Anomaly:          290.37692 +/-     0.291
Argument of Peri:      114.15186 +/-     0.072
Long of Asc Node:        5.05340 +/-     0.017
Inclination:             2.60226 +/-     0.002
Eccentricity:         0.16094029 +/-    0.0040
Semi-Major Axis:     48.18924546 +/-    0.0664
Time of Perihelion: 2479431.0786 +/-      86.0
Perihelion:          40.43365454 +/-    0.2029
Aphelion:            55.94483637 +/-    0.2098
Period (y)              334.5287 +/-      0.69
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           39.86527023 +/-    0.0025
Ecliptic Y           24.23614997 +/-    0.0015
Ecliptic Z            0.93763696 +/-    0.0001
Ecliptic XDOT        -0.00165770 +/-    0.0000
Ecliptic YDOT         0.00194555 +/-    0.0000
Ecliptic ZDOT         0.00009472 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.66379645 +/-    0.0022
Geocenter to KBO     46.10015576 +/-    0.0029
# Hcoef:  7.81

The following table shows the complete astrometric record for 11US412. 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 (11US412) followed by the observatory code and reference code for the source of the astrometry.

2011 08  29.58893  01 58 55.926  +13 22 37.48  23.7r 11US412   568  C~1CKy      
2011 10  24.40763  01 55 40.018  +13 06 09.33  24.6r 11US412   568  C~1CKy      
2011 10  24.45036  01 55 39.831  +13 06 08.40  24.3r 11US412   568  C~1CKy      
2011 10  24.49308  01 55 39.648  +13 06 07.60  24.3r 11US412   568  C~1CKy      
2011 10  26.42741  01 55 31.335  +13 05 23.38  24.1r 11US412   568  C~1CKy      
2011 10  28.48438  01 55 22.507  +13 04 36.22  24.5r 11US412   568  C~1CKy      
2011 10  30.52869  01 55 13.758  +13 03 49.53  23.9r 11US412   568  C~1CKy      
2011 10  31.51164  01 55 09.577  +13 03 26.89  24.4r 11US412   568  C~1CKy      
2011 11  24.27924  01 53 34.898  +12 54 49.34  24.5r 11US412   568  C~1CKy      
2011 11  30.32546  01 53 14.211  +12 52 53.44  24.5r 11US412   568  C~1CKy      
2012 01  27.33441  01 52 06.560  +12 45 44.43  24.1r 11US412   568  C~1CKy      
2012 08  24.52210  02 03 27.082  +13 49 32.12  24.3r 11US412   568  C~1CKy      
2012 10  17.36966  02 00 31.709  +13 35 17.22  24.5r 11US412   568  C~1CKy      
2012 10  20.46455  02 00 18.433  +13 34 08.38  24.2r 11US412   568  C~1CKy      
2013 01  14.33106  01 56 16.234  +13 11 39.84  24.8r 11US412   568  C~1CKy      
2013 02  09.23506  01 56 47.115  +13 13 54.97  24.3r 11US412   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     0.15       0.00     0.11
  2   0.1528  -3025.87    -0.07      65.90    -0.10
  3   0.1529  -3028.76    -0.05      65.98    -0.06
  4   0.1531  -3031.54     0.06      66.16     0.09
  5   0.1584  -3160.82    -0.09      67.06     0.11
  6   0.1640  -3298.19    -0.11      67.84     0.03
  7   0.1696  -3434.32    -0.08      68.68     0.15
  8   0.1723  -3499.49    -0.01      68.79    -0.05
  9   0.2373  -4977.60     0.09      67.91    -0.07
 10   0.2539  -5301.71     0.05      65.42    -0.08
 11   0.4127  -6379.68     0.08      11.31    -0.17
 12   0.9882   4267.92    -0.13     159.31     0.00
 13   1.1356   1573.44     0.06     231.55    -0.03
 14   1.1441   1367.99     0.17     233.52    -0.08
 15   1.3792  -2414.78    -0.19     191.50    -0.00
 16   1.4501  -1944.93     0.09     161.38     0.14

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.

11US412    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        48.297    48.488    48.120
ecceobj         0.160     0.172     0.149
incobj          2.600     2.600     2.601
qmin           38.513    38.223    39.483
qmax           58.109    58.723    56.979
amean          47.791    48.206    47.599
amin           47.103    47.658    47.142
amax           48.578    48.732    48.500
emean           0.159     0.184     0.124
emin            0.126     0.163     0.090
emax            0.197     0.205     0.175
imean           3.490     3.180     2.981
imin            2.648     2.535     2.412
imax            4.202     3.845     3.616
excite_mean     0.171     0.193     0.134
fracstop        1.000     1.000     1.000
cjmean          3.112     3.108     3.124

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       178.0     178.5     180.6
kozaiamp        180.0     180.0     179.9