Orbit Fit and Astrometric record for 14LS28

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: 14LS28    
# Created Wed Oct 17 01:09:37 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   15 observations of   16
# Arc:   6.86y
# First observation: 2011/06/02
#  Last observation: 2018/04/10
# Chi-squared of fit:    21.64 DOF:   24 RMS:  0.21
# Min/Max residuals:    -0.35    0.65
# Exact a, adot, b, bdot, g, gdot:
  1.481950E-05  2.333772E-02 -1.644944E-06 -5.340560E-04  2.405089E-02 -1.661807E-03
# Covariance matrix:
  4.8911E-13 -3.6962E-13 -1.0063E-15  4.8483E-15 -2.1267E-13 -2.9279E-12
 -3.6962E-13  5.3702E-12  5.4551E-14 -1.4923E-13 -2.6175E-12  7.9838E-11
 -1.0063E-15  5.4551E-14  4.2892E-13 -1.5835E-13 -3.4194E-14  8.2901E-13
  4.8483E-15 -1.4923E-13 -1.5835E-13  8.0018E-14  8.0785E-14 -2.2566E-12
 -2.1267E-13 -2.6175E-12 -3.4194E-14  8.0785E-14  3.2292E-12 -4.1185E-11
 -2.9279E-12  7.9838E-11  8.2901E-13 -2.2566E-12 -4.1185E-11  1.2054E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.659088 -133.813451   -0.427762    0.058728   -0.919305  2455714.826916
# Heliocentric elements and errors
Epoch:              2455714.5000  =  2011/06/02
Mean Anomaly:          287.22344 +/-     0.331
Argument of Peri:      190.54865 +/-     0.519
Long of Asc Node:      116.08634 +/-     0.009
Inclination:             3.82576 +/-     0.000
Eccentricity:         0.06379655 +/-    0.0014
Semi-Major Axis:     43.14783005 +/-    0.0123
Time of Perihelion: 2476642.4128 +/-     101.5
Perihelion:          40.39514748 +/-    0.0622
Aphelion:            45.90051261 +/-    0.0625
Period (y)              283.4305 +/-      0.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -29.05132336 +/-    0.0021
Ecliptic Y          -30.90287565 +/-    0.0022
Ecliptic Z            2.65350931 +/-    0.0002
Ecliptic XDOT         0.00204278 +/-    0.0000
Ecliptic YDOT        -0.00169997 +/-    0.0000
Ecliptic ZDOT        -0.00007270 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.49719493 +/-    0.0022
Geocenter to KBO     41.57858280 +/-    0.0031
# Hcoef:  6.04

The following table shows the complete astrometric record for 14LS28. 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 (14LS28) followed by the observatory code and reference code for the source of the astrometry.

2011 06  02.32615  14 59 11.947  -13 10 23.74  22.2w 14LS28    F51  C~1vXZ      
2011 06  02.33944  14 59 11.883  -13 10 23.55  22.7w 14LS28    F51  C~1vXZ      
2011 06  02.35272  14 59 11.824  -13 10 23.20  22.3w 14LS28    F51  C~1vXZ      
2013 05  08.43340  15 11 35.661  -14 05 38.90  22.3w 14LS28    F51  C~1vXZ      
2013 05  08.44751  15 11 35.592  -14 05 38.61  22.4w 14LS28    F51  C~1vXZ      
2013 05  08.46159  15 11 35.522  -14 05 38.30  22.3w 14LS28    F51  C~1vXZ      
2013 05  08.47574  15 11 35.453  -14 05 38.03  22.4w 14LS28    F51  C~1vXZ      
2014 06  03.40834  15 14 55.596  -14 21 46.57  22.1w 14LS28    F51  C~1vXZ      
2014 06  03.42106  15 14 55.526  -14 21 46.50  22.4w 14LS28    F51  C~1vXZ      
2014 06  03.43376  15 14 55.465  -14 21 46.14  22.3w 14LS28    F51  C~1vXZ      
2014 06  03.44644  15 14 55.414  -14 21 46.04  22.2w 14LS28    F51  C~1vXZ      
2014 06  21.35596  15 13 44.445  -14 18 00.06  21.8w 14LS28    F51  C~1vXZ      
2014 06  21.36857  15 13 44.388  -14 17 59.93  21.9w 14LS28    F51  C~1vXZ      
2014 06  21.38119  15 13 44.371  -14 17 59.93  21.7w 14LS28    F51  C~1vXZ      
2018 04  10.34497  15 40 40.637  -16 06 41.75  23.9R 14LS28    G37  C~2bHC      
2018 04  10.43092  15 40 40.364  -16 06 38.39        14LS28    G37  C~2bHC      

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     0.23       0.00     0.21
  2   0.0000      0.00     0.13       0.00     0.20
  3   0.0001      0.00     0.10       0.00     0.34
  4   1.9332      0.00     0.06       0.00    -0.03
  5   1.9333      0.00     0.05       0.00    -0.01
  6   1.9333      0.00     0.02       0.00     0.03
  7   1.9333      0.00     0.01       0.00     0.03
  8   3.0036      0.00     0.22       0.00    -0.23
  9   3.0037      0.00     0.02       0.00    -0.35
 10   3.0037      0.00    -0.05       0.00    -0.18
 11   3.0038      0.00     0.03       0.00    -0.27
 12   3.0528      0.00    -0.10       0.00    -0.15
 13   3.0528      0.00    -0.28       0.00    -0.15
 14   3.0529      0.00     0.14       0.00    -0.28
 15   6.8556      0.00     0.21       0.00     0.65
 16   6.8559      0.00 (   0.92)      0.00 (   2.72)

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.

14LS28    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.020    43.020    43.020
ecceobj         0.064     0.064     0.064
incobj          3.826     3.826     3.826
qmin           39.790    39.821    39.804
qmax           47.075    47.046    47.076
amean          43.339    43.339    43.339
amin           43.006    43.002    43.002
amax           43.702    43.696    43.702
emean           0.060     0.060     0.060
emin            0.041     0.041     0.041
emax            0.078     0.077     0.078
imean           2.620     2.620     2.620
imin            1.637     1.637     1.637
imax            3.492     3.492     3.494
excite_mean     0.077     0.077     0.077
fracstop        1.000     1.000     1.000
cjmean          3.087     3.087     3.087

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       176.4     176.2     176.4
kozaiamp        179.9     180.0     179.9