Orbit Fit and Astrometric record for 14LU28

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: 14LU28    
# Created Sat Dec 16 02:38:03 2017
# Orbit generated from Bernstein formalism
# Fitting   23 observations of   23
# Arc:   3.06y
# First observation: 2012/06/15
#  Last observation: 2015/07/07
Preliminary a, adot, b, bdot, g, gdot:
   0.000035   0.031523   0.000032  -0.014536   0.029181   0.000000
# Chi-squared of fit:     7.41 DOF:   40 RMS:  0.10
# Min/Max residuals:    -0.19    0.32
# Exact a, adot, b, bdot, g, gdot:
  1.803601E-05  3.172227E-02 -8.226637E-06 -1.464715E-02  2.867194E-02  2.146027E-03
# Covariance matrix:
  3.5698E-13 -2.6966E-13 -1.9718E-14  6.5629E-14 -9.7439E-14 -1.5386E-12
 -2.6966E-13  5.9023E-13  7.5339E-14 -2.4136E-13  5.1701E-13  5.6983E-12
 -1.9718E-14  7.5339E-14  3.2564E-13 -1.6168E-13  8.2508E-14  8.1802E-13
  6.5629E-14 -2.4136E-13 -1.6168E-13  1.7542E-13 -2.3528E-13 -2.6161E-12
 -9.7439E-14  5.1701E-13  8.2508E-14 -2.3528E-13  1.0132E-12  5.6826E-12
 -1.5386E-12  5.6983E-12  8.1802E-13 -2.6161E-12  5.6826E-12  6.1786E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   21.728438 -113.916242   -0.319539    0.357817   -0.897965  2456093.889686
# Heliocentric elements and errors
Epoch:              2456090.5000  =  2012/06/12
Mean Anomaly:            7.30345 +/-     0.021
Argument of Peri:      121.29232 +/-     0.049
Long of Asc Node:      104.37044 +/-     0.000
Inclination:            32.30624 +/-     0.000
Eccentricity:         0.35306673 +/-    0.0001
Semi-Major Axis:     54.72560230 +/-    0.0098
Time of Perihelion: 2453090.5802 +/-       8.7
Perihelion:          35.40381306 +/-    0.0086
Aphelion:            74.04739154 +/-    0.0145
Period (y)              404.8499 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -13.23147222 +/-    0.0005
Ecliptic Y          -30.62895500 +/-    0.0010
Ecliptic Z           12.91164524 +/-    0.0005
Ecliptic XDOT         0.00247672 +/-    0.0000
Ecliptic YDOT        -0.00187210 +/-    0.0000
Ecliptic ZDOT        -0.00122329 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.77590424 +/-    0.0009
Geocenter to KBO     34.87730907 +/-    0.0012
# Hcoef:  6.69

The following table shows the complete astrometric record for 14LU28. 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 (14LU28) followed by the observatory code and reference code for the source of the astrometry.

2012 06  15.38892  16 31 30.464  +00 06 25.98  22.2w 14LU28    F51  C~1vXZ      
2012 06  15.40254  16 31 30.403  +00 06 25.83  22.4w 14LU28    F51  C~1vXZ      
2012 06  15.41614  16 31 30.324  +00 06 25.71  22.0w 14LU28    F51  C~1vXZ      
2012 06  15.42986  16 31 30.253  +00 06 25.66  22.4w 14LU28    F51  C~1vXZ      
2014 06  02.36411  16 45 55.615  -02 06 54.91  22.2w 14LU28    F51  C~1vXZ      
2014 06  02.37534  16 45 55.538  -02 06 55.05  22.2w 14LU28    F51  C~1vXZ      
2014 06  02.38659  16 45 55.479  -02 06 54.84  22.1w 14LU28    F51  C~1vXZ      
2014 06  02.39787  16 45 55.409  -02 06 54.98  22.6w 14LU28    F51  C~1vXZ      
2014 06  30.37613  16 43 26.977  -02 09 53.28  22.3w 14LU28    F51  C~1vXZ      
2014 06  30.38750  16 43 26.928  -02 09 53.14  22.4w 14LU28    F51  C~1vXZ      
2014 06  30.39890  16 43 26.860  -02 09 53.64  22.4w 14LU28    F51  C~1vXZ      
2014 06  30.41025  16 43 26.805  -02 09 53.87  22.3w 14LU28    F51  C~1vXZ      
2014 07  30.34085  16 41 32.006  -02 21 34.86  22.8w 14LU28    F51  C~1vXZ      
2014 07  30.35281  16 41 31.968  -02 21 35.36  22.5w 14LU28    F51  C~1vXZ      
2014 07  30.36474  16 41 31.929  -02 21 35.78  22.2w 14LU28    F51  C~1vXZ      
2014 07  30.37671  16 41 31.900  -02 21 36.03  22.2w 14LU28    F51  C~1vXZ      
2015 05  18.53011  16 53 50.508  -03 14 40.35  22.3w 14LU28    F51  C~1vXZ      
2015 05  18.54071  16 53 50.461  -03 14 40.52  21.9w 14LU28    F51  C~1vXZ      
2015 05  18.55129  16 53 50.396  -03 14 40.21  22.5w 14LU28    F51  C~1vXZ      
2015 05  18.56184  16 53 50.338  -03 14 39.98  22.2w 14LU28    F51  C~1vXZ      
2015 07  07.28886  16 49 28.001  -03 17 45.36  22.6w 14LU28    F51  C~1vXZ      
2015 07  07.29957  16 49 27.975  -03 17 45.58  22.6w 14LU28    F51  C~1vXZ      
2015 07  07.31026  16 49 27.905  -03 17 45.89  22.5w 14LU28    F51  C~1vXZ      

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    -0.11       0.00     0.03
  2   0.0000     -0.88     0.08      -0.30     0.01
  3   0.0001     -2.03     0.00      -0.61    -0.03
  4   0.0001     -3.07     0.04      -0.83     0.02
  5   1.9630  14118.56     0.14   -5819.42     0.00
  6   1.9630  14117.44    -0.04   -5819.75    -0.19
  7   1.9630  14116.52    -0.01   -5819.68     0.00
  8   1.9631  14115.51    -0.08   -5819.99    -0.17
  9   2.0397  11938.79     0.04   -6352.04    -0.00
 10   2.0397  11938.04     0.10   -6352.02     0.32
 11   2.0397  11937.11    -0.02   -6352.68    -0.04
 12   2.0398  11936.34    -0.00   -6353.04    -0.09
 13   2.1217  10345.74     0.04   -7321.95     0.13
 14   2.1217  10345.26    -0.02   -7322.54    -0.01
 15   2.1218  10344.75    -0.11   -7323.05    -0.07
 16   2.1218  10344.36    -0.08   -7323.37     0.06
 17   2.9217  21859.80    -0.05   -8724.96     0.06
 18   2.9217  21859.12     0.13   -8725.24    -0.19
 19   2.9217  21858.10    -0.04   -8725.09    -0.01
 20   2.9218  21857.20    -0.09   -8724.99     0.11
 21   3.0579  17969.87    -0.11   -9529.25     0.06
 22   3.0579  17969.52     0.24   -9529.53     0.08
 23   3.0580  17968.52    -0.04   -9530.00    -0.08

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.

14LU28    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        54.493    54.522    54.463
ecceobj         0.350     0.351     0.350
incobj         32.294    32.294    32.294
qmin           34.530    34.499    34.552
qmax           76.566    76.856    76.625
amean          55.108    55.147    55.076
amin           54.493    54.522    54.464
amax           55.871    55.947    55.842
emean           0.351     0.349     0.350
emin            0.329     0.327     0.329
emax            0.372     0.374     0.372
imean          30.912    30.971    30.915
imin           30.301    30.305    30.329
imax           31.728    31.796    31.674
excite_mean     0.622     0.622     0.622
fracstop        1.000     1.000     1.000
cjmean          2.721     2.721     2.721

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       196.8     205.0     193.3
kozaiamp        179.9     179.9     179.9