Orbit Fit and Astrometric record for 13EJ154

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: 13EJ154   
# Created Thu Oct 19 01:38:12 2017
# Orbit generated from Bernstein formalism
# Fitting   21 observations of   23
# Arc:   2.98y
# First observation: 2011/03/30
#  Last observation: 2014/03/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.000100   0.018137   0.000015  -0.001316   0.020521   0.000000
# Chi-squared of fit:    13.94 DOF:   36 RMS:  0.14
# Min/Max residuals:    -0.23    0.39
# Exact a, adot, b, bdot, g, gdot:
  1.335880E-05  1.810286E-02 -9.007326E-08 -1.312797E-03  2.113795E-02  1.079901E-03
# Covariance matrix:
  3.6521E-13 -3.0991E-13  5.6283E-15  1.0603E-14 -2.0341E-13 -3.4747E-12
 -3.0991E-13  6.3023E-13  7.6917E-15 -3.6924E-14  2.0408E-13  9.6198E-12
  5.6283E-15  7.6917E-15  2.4640E-13 -9.7757E-14 -2.3242E-14  1.4534E-13
  1.0603E-14 -3.6924E-14 -9.7757E-14  5.6282E-14 -3.7064E-15 -6.2223E-13
 -2.0341E-13  2.0408E-13 -2.3242E-14 -3.7064E-15  4.6420E-13  3.1486E-12
 -3.4747E-12  9.6198E-12  1.4534E-13 -6.2223E-13  3.1486E-12  1.6068E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -9.064015  175.053406   -0.243469   -0.153252   -0.960464  2455650.870386
# Heliocentric elements and errors
Epoch:              2455650.5000  =  2011/03/30
Mean Anomaly:          143.22661 +/-     0.278
Argument of Peri:       94.83170 +/-     0.272
Long of Asc Node:      290.33533 +/-     0.004
Inclination:             9.78323 +/-     0.000
Eccentricity:         0.11899362 +/-    0.0003
Semi-Major Axis:     43.88834471 +/-    0.0062
Time of Perihelion: 2413398.8715 +/-      81.5
Perihelion:          38.66591148 +/-    0.0136
Aphelion:            49.11077794 +/-    0.0143
Period (y)              290.7582 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -47.52950971 +/-    0.0015
Ecliptic Y            3.86881955 +/-    0.0001
Ecliptic Z           -7.45283612 +/-    0.0002
Ecliptic XDOT        -0.00031471 +/-    0.0000
Ecliptic YDOT        -0.00232042 +/-    0.0000
Ecliptic ZDOT        -0.00018993 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   48.26558634 +/-    0.0015
Geocenter to KBO     47.30827828 +/-    0.0015
# Hcoef:  5.84

The following table shows the complete astrometric record for 13EJ154. 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 (13EJ154) followed by the observatory code and reference code for the source of the astrometry.

2011 03  30.36962  11 27 25.473  -06 21 13.62  23.5w 13EJ154   F51  C~1w3t      
2011 03  30.38293  11 27 25.416  -06 21 13.21  23.6w 13EJ154   F51  C~1w3t      
2011 03  30.39739  11 27 25.368  -06 21 12.76  23.4w 13EJ154   F51  C~1w3t      
2011 03  30.41066  11 27 25.321  -06 21 12.13  23.7w 13EJ154   F51  C~1w3t      
2011 12  04.59767  11 35 29.608  -07 01 57.63  23.1w 13EJ154   F51  C~1w3t      
2011 12  04.60691  11 35 29.598  -07 01 57.71  23.2w 13EJ154   F51  C~1w3t      
2011 12  04.61156  11 35 29.624  -07 01 57.92  23.0w 13EJ154   F51  C~1w3t      
2013 03  06.41764  11 36 23.445  -07 28 30.45  22.0w 13EJ154   F51  C~1w3t      
2013 03  06.43222  11 36 23.347  -07 28 29.43  21.5w 13EJ154   F51  C~1w3t      
2013 03  06.44685  11 36 23.322  -07 28 29.51  22.4w 13EJ154   F51  C~1w3t      
2013 04  05.32982  11 34 25.323  -07 15 47.25  22.5w 13EJ154   F51  C~1w3t      
2013 04  05.34902  11 34 25.256  -07 15 46.88  22.5w 13EJ154   F51  C~1w3t      
2013 04  05.36338  11 34 25.195  -07 15 46.43  22.2w 13EJ154   F51  C~1w3t      
2013 04  05.37298  11 34 25.182  -07 15 46.06  22.4w 13EJ154   F51  C~1w3t      
2013 04  05.37782  11 34 25.157  -07 15 45.88  22.4w 13EJ154   F51  C~1w3t      
2014 02  28.45928  11 40 30.433  -07 59 08.65  23.0w 13EJ154   F51  C~1w3t      
2014 02  28.47135  11 40 30.377  -07 59 08.42  23.0w 13EJ154   F51  C~1w3t      
2014 02  28.48342  11 40 30.326  -07 59 08.00  23.2w 13EJ154   F51  C~1w3t      
2014 02  28.49553  11 40 30.272  -07 59 07.85  22.5w 13EJ154   F51  C~1w3t      
2014 03  24.40427  11 38 54.765  -07 49 44.98  22.5w 13EJ154   F51  C~1w3t      
2014 03  24.41657  11 38 54.727  -07 49 44.48  22.3w 13EJ154   F51  C~1w3t      
2014 03  24.42886  11 38 54.686  -07 49 44.85  22.5w 13EJ154   F51  C~1w3t      
2014 03  24.44118  11 38 54.610  -07 49 44.22  22.5w 13EJ154   F51  C~1w3t      

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    -0.18
  2   0.0000     -0.94    -0.05       0.04    -0.17
  3   0.0001     -1.78     0.04       0.16    -0.06
  4   0.0001     -2.67    -0.01       0.46     0.22
  5   0.6823   7593.54     0.13     619.61     0.10
  6   0.6824   7593.44    -0.23     619.47     0.08
  7   0.6824   7593.88     0.07     619.43     0.10
  8   1.9358   8960.48 (   0.70)   -528.62 (  -0.23)
  9   1.9358   8958.74    -0.11    -528.26     0.18
 10   1.9359   8958.43 (   0.53)   -528.48 (   0.01)
 11   2.0177   7041.81    -0.09    -521.32    -0.06
 12   2.0177   7040.75     0.04    -521.37    -0.17
 13   2.0178   7039.74    -0.08    -521.32    -0.16
 14   2.0178   7039.41     0.19    -521.06     0.08
 15   2.0178   7039.00     0.08    -521.04     0.08
 16   2.9188  13070.60     0.18    -775.43    -0.08
 17   2.9188  13069.74     0.07    -775.55    -0.14
 18   2.9189  13068.87    -0.05    -775.46     0.00
 19   2.9189  13068.07    -0.09    -775.64    -0.12
 20   2.9844  11536.60    -0.18    -815.00     0.16
 21   2.9844  11535.88    -0.09    -814.76     0.39
 22   2.9844  11535.46     0.31    -815.34    -0.19
 23   2.9845  11534.17    -0.17    -815.21    -0.06

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.

13EJ154    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.904    43.923    43.886
ecceobj         0.120     0.120     0.120
incobj          9.776     9.776     9.776
qmin           38.204    38.224    38.219
qmax           50.273    50.270    50.183
amean          44.074    44.093    44.055
amin           43.717    43.733    43.693
amax           44.470    44.493    44.452
emean           0.116     0.116     0.116
emin            0.102     0.102     0.102
emax            0.131     0.131     0.130
imean          11.538    11.538    11.538
imin           10.893    10.899    10.892
imax           12.090    12.096    12.095
excite_mean     0.231     0.231     0.231
fracstop        1.000     1.000     1.000
cjmean          3.037     3.037     3.037

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       178.5     178.4     178.7
kozaiamp        180.0     180.0     180.0