Orbit Fit and Astrometric record for 11UM411

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: 11UM411   
# Created Sat Oct 21 01:37:57 2017
# Orbit generated from Bernstein formalism
# Fitting   14 observations of   14
# Arc:   4.04y
# First observation: 2011/10/24
#  Last observation: 2015/11/08
Preliminary a, adot, b, bdot, g, gdot:
  -0.000039   0.017406  -0.000010   0.002715   0.020840   0.000000
# Chi-squared of fit:     5.36 DOF:   22 RMS:  0.11
# Min/Max residuals:    -0.18    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.324221E-05  1.739638E-02  2.392274E-06  2.710614E-03  2.108966E-02 -9.066345E-05
# Covariance matrix:
  2.1907E-13 -2.7017E-13  1.1163E-14 -3.6081E-14  2.8270E-15 -3.2856E-12
 -2.7017E-13  8.5537E-13 -3.9963E-14  1.3382E-13  8.9226E-14  1.2193E-11
  1.1163E-14 -3.9963E-14  1.6211E-13 -6.3128E-14  2.3846E-15 -6.1506E-13
 -3.6081E-14  1.3382E-13 -6.3128E-14  8.1254E-14  1.2378E-14  2.0496E-12
  2.8270E-15  8.9226E-14  2.3846E-15  1.2378E-14  4.2978E-13  1.1595E-12
 -3.2856E-12  1.2193E-11 -6.1506E-13  2.0496E-12  1.1595E-12  1.8674E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.183459   30.693192    0.002480    0.055053   -0.989727  2455858.934056
# Heliocentric elements and errors
Epoch:              2455850.5000  =  2011/10/16
Mean Anomaly:          182.53982 +/-     0.268
Argument of Peri:      197.57497 +/-     0.269
Long of Asc Node:       11.40075 +/-     0.002
Inclination:             9.36454 +/-     0.001
Eccentricity:         0.14080687 +/-    0.0001
Semi-Major Axis:     42.43882854 +/-    0.0049
Time of Perihelion: 2505629.0150 +/-      74.7
Perihelion:          36.46314989 +/-    0.0069
Aphelion:            48.41450718 +/-    0.0078
Period (y)              276.4734 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           41.56807987 +/-    0.0013
Ecliptic Y           24.67139621 +/-    0.0008
Ecliptic Z            2.63330271 +/-    0.0001
Ecliptic XDOT        -0.00118331 +/-    0.0000
Ecliptic YDOT         0.00193115 +/-    0.0000
Ecliptic ZDOT         0.00035076 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   48.40988884 +/-    0.0012
Geocenter to KBO     47.41660708 +/-    0.0015
# Hcoef:  7.38

The following table shows the complete astrometric record for 11UM411. 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 (11UM411) followed by the observatory code and reference code for the source of the astrometry.

2011 10  24.43329  01 49 41.793  +14 41 43.19  23.9r 11UM411   568  C~1C6O      
2011 10  24.47598  01 49 41.607  +14 41 42.29  24.3r 11UM411   568  C~1C6O      
2011 10  24.51878  01 49 41.422  +14 41 41.33  23.9r 11UM411   568  C~1C6O      
2011 10  29.33738  01 49 21.006  +14 39 56.05        11UM411   568  C~1C6O      
2011 10  30.55522  01 49 15.844  +14 39 28.92  24.0r 11UM411   568  C~1C6O      
2011 11  24.26645  01 47 39.023  +14 30 40.03        11UM411   568  C~1C6O      
2012 01  26.25193  01 46 13.184  +14 20 29.88  24.0r 11UM411   568  C~1C6O      
2012 08  23.55493  01 56 48.203  +15 26 16.84  24.4r 11UM411   568  C~1C6O      
2012 08  24.58617  01 56 46.331  +15 26 12.61        11UM411   568  C~1C6O      
2012 10  17.41666  01 53 47.309  +15 13 45.21        11UM411   568  C~1C6O      
2012 10  20.51348  01 53 34.129  +15 12 40.25  23.9r 11UM411   568  C~1C6O      
2013 02  06.28578  01 50 04.286  +14 50 55.72  24.2r 11UM411   568  C~1C6O      
2015 11  08.24266  02 03 18.65   +16 34 21.5   23.7R 11UM411   G37  C~1ddG      
2015 11  08.30639  02 03 18.39   +16 34 19.8         11UM411   G37  C~1ddG      

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    -0.04       0.00    -0.07
  2   0.0001     -2.84    -0.05       0.11    -0.04
  3   0.0002     -5.69    -0.06       0.16    -0.06
  4   0.0134   -320.02     0.16       6.51     0.06
  5   0.0168   -399.69    -0.07       7.65    -0.17
  6   0.0844  -1901.47     0.12      12.01     0.06
  7   0.2569  -3284.25    -0.09    -113.59     0.30
  8   0.8326   6723.68    -0.10     343.84    -0.05
  9   0.8355   6696.79     0.01     349.24     0.07
 10   0.9828   4006.92     0.09     548.95    -0.00
 11   0.9913   3805.41     0.08     554.74     0.06
 12   1.2891    500.47    -0.05     401.57    -0.16
 13   4.0405  13428.52    -0.03    2257.73     0.19
 14   4.0407  13424.40     0.03    2257.39    -0.18

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.

11UM411    quality flag:3

Type:          5:3EE     5:3EE     5:3EE

axisobj        42.514    42.529    42.499
ecceobj         0.139     0.138     0.139
incobj          9.354     9.354     9.354
qmin           34.866    34.792    34.675
qmax           50.237    50.212    50.356
amean          42.328    42.328    42.328
amin           41.949    41.954    41.931
amax           42.767    42.737    42.769
emean           0.157     0.155     0.158
emin            0.137     0.136     0.139
emax            0.175     0.175     0.179
imean           9.137     9.170     9.105
imin            8.403     8.476     8.325
imax           10.000     9.992    10.012
excite_mean     0.223     0.223     0.224
fracstop        1.000     1.000     1.000
cjmean          3.023     3.023     3.023

libcent 0       178.1     179.4     180.9
libamp  0        48.8      38.0      56.8
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       174.1     175.4     176.7
kozaiamp        180.0     180.0     180.0