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 Sat Jul 21 01:37:56 2018
# Orbit generated from Bernstein formalism
# Fitting   30 observations of   32
# Arc:  15.01y
# First observation: 1999/03/20
#  Last observation: 2014/03/24
Preliminary a, adot, b, bdot, g, gdot:
   0.000227   0.018667   0.000045  -0.001960   0.018958   0.000000
# Chi-squared of fit:    23.10 DOF:   54 RMS:  0.16
# Min/Max residuals:    -0.40    0.41
# Exact a, adot, b, bdot, g, gdot:
  1.420713E-05  1.866837E-02 -2.087183E-06 -1.952621E-03  2.149567E-02  1.513179E-03
# Covariance matrix:
  1.9637E-13 -4.4331E-14 -1.2687E-15  3.3673E-15 -7.3988E-14 -1.1595E-13
 -4.4331E-14  5.9890E-14  2.9908E-15 -6.0564E-15  3.0272E-14  2.1385E-13
 -1.2687E-15  2.9908E-15  1.6792E-13 -1.2451E-14 -4.0818E-16  1.0951E-14
  3.3673E-15 -6.0564E-15 -1.2451E-14  1.8593E-15 -3.3554E-15 -2.2075E-14
 -7.3988E-14  3.0272E-14 -4.0818E-16 -3.3554E-15  3.1628E-13  1.0302E-13
 -1.1595E-13  2.1385E-13  1.0951E-14 -2.2075E-14  1.0302E-13  7.7983E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -7.947292  162.457230   -0.289665   -0.133151   -0.952039  2451257.746938
# Heliocentric elements and errors
Epoch:              2451250.5000  =  1999/03/13
Mean Anomaly:          128.25062 +/-     0.039
Argument of Peri:       94.70209 +/-     0.030
Long of Asc Node:      290.34128 +/-     0.001
Inclination:             9.78579 +/-     0.000
Eccentricity:         0.12090216 +/-    0.0001
Semi-Major Axis:     43.83111609 +/-    0.0039
Time of Perihelion: 2413490.7436 +/-      10.3
Perihelion:          38.53183967 +/-    0.0042
Aphelion:            49.13039250 +/-    0.0050
Period (y)              290.1897 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -44.92727160 +/-    0.0012
Ecliptic Y           13.90091084 +/-    0.0004
Ecliptic Z           -6.43216732 +/-    0.0002
Ecliptic XDOT        -0.00086805 +/-    0.0000
Ecliptic YDOT        -0.00221112 +/-    0.0000
Ecliptic ZDOT        -0.00027295 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   47.46649168 +/-    0.0011
Geocenter to KBO     46.52100632 +/-    0.0012
# Hcoef:  5.83

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.

1999 03  20.246195 10 43 11.55   -00 27 52.3         13EJ154   645  C~2e9Z      
1999 03  20.247024 10 43 11.55   -00 27 52.3         13EJ154   645  C~2e9Z      
1999 03  20.249512 10 43 11.54   -00 27 52.3         13EJ154   645  C~2e9Z      
1999 03  22.240814 10 43 03.92   -00 27 01.2         13EJ154   645  C~2e9Z      
1999 03  22.241643 10 43 03.92   -00 27 01.2         13EJ154   645  C~2e9Z      
1999 03  22.244131 10 43 03.91   -00 27 01.2         13EJ154   645  C~2e9Z      
2000 02  12.376252 10 49 24.05   -01 12 16.5         13EJ154   645  C~2e9Z      
2000 02  12.377081 10 49 24.05   -01 12 16.5         13EJ154   645  C~2e9Z      
2000 02  12.379569 10 49 24.04   -01 12 16.5         13EJ154   645  C~2e9Z      
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    -0.10       0.00     0.13
  2   0.0000      0.00    -0.04       0.00     0.13
  3   0.0000     -0.14    -0.02      -0.06     0.07
  4   0.0055   -125.28    -0.12       3.87     0.09
  5   0.0055   -125.28    -0.07       3.87     0.09
  6   0.0055   -125.42    -0.05       3.82     0.03
  7   0.9011   6181.71     0.12    -347.23    -0.18
  8   0.9011   6181.71     0.17    -347.23    -0.18
  9   0.9011   6181.57     0.18    -347.28    -0.22
 10  12.0277  45499.85     0.11   -4811.97    -0.19
 11  12.0278  45498.86     0.01   -4811.90    -0.17
 12  12.0278  45497.99     0.11   -4811.74    -0.07
 13  12.0278  45497.06     0.07   -4811.40     0.22
 14  12.7101  53546.08    -0.01   -4448.29     0.10
 15  12.7101  53545.96    -0.40   -4448.43     0.09
 16  12.7101  53546.43    -0.07   -4448.48     0.10
 17  13.9635  54969.18 (   0.65)  -5684.67 (  -0.25)
 18  13.9635  54967.33    -0.20   -5684.23     0.20
 19  13.9636  54966.99 (   0.47)  -5684.44 (   0.00)
 20  14.0454  52922.74    -0.19   -5605.63    -0.05
 21  14.0455  52921.61    -0.06   -5605.65    -0.17
 22  14.0455  52920.53    -0.18   -5605.55    -0.15
 23  14.0455  52920.20     0.11   -5605.27     0.09
 24  14.0455  52919.76    -0.01   -5605.23     0.10
 25  14.9465  59374.60     0.29   -6095.18    -0.09
 26  14.9465  59373.67     0.17   -6095.27    -0.15
 27  14.9466  59372.74     0.05   -6095.14     0.00
 28  14.9466  59371.87    -0.01   -6095.30    -0.12
 29  15.0121  57721.67    -0.12   -6078.08     0.17
 30  15.0121  57720.91    -0.02   -6077.81     0.41
 31  15.0121  57720.44     0.39   -6078.39    -0.21
 32  15.0122  57719.06    -0.12   -6078.21    -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        43.910    43.922    43.898
ecceobj         0.120     0.120     0.120
incobj          9.776     9.776     9.776
qmin           38.179    38.190    38.180
qmax           50.270    50.274    50.253
amean          44.080    44.092    44.068
amin           43.731    43.724    43.707
amax           44.482    44.477    44.453
emean           0.116     0.116     0.117
emin            0.102     0.102     0.102
emax            0.131     0.131     0.131
imean          11.538    11.537    11.538
imin           10.891    10.894    10.886
imax           12.085    12.088    12.098
excite_mean     0.231     0.231     0.232
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       178.6     178.2     178.6
kozaiamp        180.0     180.0     180.0