Orbit Fit and Astrometric record for 13FQ28

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: 13FQ28    
# Created Sat Oct 21 01:38:13 2017
# Orbit generated from Bernstein formalism
# Fitting   15 observations of   15
# Arc:   2.09y
# First observation: 2013/03/17
#  Last observation: 2015/04/20
Preliminary a, adot, b, bdot, g, gdot:
   0.000009   0.009745  -0.000002   0.004632   0.015020   0.000000
# Chi-squared of fit:    12.56 DOF:   24 RMS:  0.16
# Min/Max residuals:    -0.40    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.170877E-05  9.819497E-03  4.753957E-06  4.650207E-03  1.517790E-02  3.107812E-03
# Covariance matrix:
  4.1309E-13 -3.0508E-13  1.8967E-14 -9.2596E-14  1.5917E-13 -1.0231E-11
 -3.0508E-13  8.9109E-13 -1.3513E-13  5.1962E-13  3.6251E-13  5.4647E-11
  1.8967E-14 -1.3513E-13  2.7971E-13 -2.7009E-13 -8.1445E-14 -1.0499E-11
 -9.2596E-14  5.1962E-13 -2.7009E-13  5.7068E-13  2.7957E-13  4.0336E-11
  1.5917E-13  3.6251E-13 -8.1445E-14  2.7957E-13  5.7763E-13  2.8559E-11
 -1.0231E-11  5.4647E-11 -1.0499E-11  4.0336E-11  2.8559E-11  4.2412E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -5.505230 -156.112551    0.453315   -0.084996   -0.882556  2456368.783938
# Heliocentric elements and errors
Epoch:              2456360.5000  =  2013/03/09
Mean Anomaly:           87.50065 +/-     0.906
Argument of Peri:      229.05324 +/-     0.535
Long of Asc Node:      214.82367 +/-     0.001
Inclination:            25.83199 +/-     0.002
Eccentricity:         0.27913205 +/-    0.0045
Semi-Major Axis:     62.79648325 +/-    0.1806
Time of Perihelion: 2412182.0784 +/-     416.0
Perihelion:          45.26797233 +/-    0.3117
Aphelion:            80.32499417 +/-    0.3655
Period (y)              497.6353 +/-      2.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -60.95698902 +/-    0.0030
Ecliptic Y          -26.49934185 +/-    0.0013
Ecliptic Z           -6.32051023 +/-    0.0003
Ecliptic XDOT         0.00012720 +/-    0.0000
Ecliptic YDOT        -0.00187752 +/-    0.0000
Ecliptic ZDOT         0.00078131 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   66.76764545 +/-    0.0028
Geocenter to KBO     65.88525525 +/-    0.0033
# Hcoef:  6.03

The following table shows the complete astrometric record for 13FQ28. 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 (13FQ28) followed by the observatory code and reference code for the source of the astrometry.

2013 03  17.28316  13 20 05.240  -14 22 48.38        13FQ28    807  C~1u4x      
2013 03  17.32648  13 20 05.154  -14 22 47.86  24.2r 13FQ28    807  C~1u4x      
2013 03  17.37478  13 20 05.021  -14 22 47.23        13FQ28    807  C~1u4x      
2013 07  07.98216  13 16 09.99   -13 50 19.86        13FQ28    304  C~1u4x      
2013 07  08.03059  13 16 10.00   -13 50 19.72        13FQ28    304  C~1u4x      
2013 07  08.06105  13 16 10.01   -13 50 19.54        13FQ28    304  C~1u4x      
2014 03  28.26718  13 22 08.807  -14 17 33.18        13FQ28    807  C~1u4x      
2014 03  28.33522  13 22 08.576  -14 17 31.91        13FQ28    807  C~1u4x      
2014 03  28.37777  13 22 08.479  -14 17 31.24        13FQ28    807  C~1u4x      
2014 05  01.17712  13 20 28.748  -14 06 13.47        13FQ28    304  C~1u4x      
2014 05  01.21898  13 20 28.633  -14 06 12.59  24.0r 13FQ28    304  C~1u4x      
2014 05  02.17901  13 20 25.922  -14 05 52.47        13FQ28    304  C~1u4x      
2015 04  19.30984  13 23 37.140  -14 08 14.91        13FQ28    304  C~1u4x      
2015 04  19.33311  13 23 37.050  -14 08 14.65        13FQ28    304  C~1u4x      
2015 04  20.31064  13 23 34.148  -14 07 54.24        13FQ28    304  C~1u4x      

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    -0.31       0.00     0.02
  2   0.0001     -1.35     0.20       0.01     0.03
  3   0.0003     -3.38     0.24      -0.13    -0.11
  4   0.3086  -3905.05    -0.18     512.87     0.21
  5   0.3087  -3904.97    -0.02     513.05     0.05
  6   0.3088  -3904.91     0.08     513.27     0.05
  7   1.0294   1547.16     0.03     964.70     0.11
  8   1.0296   1543.57    -0.40     964.63    -0.03
  9   1.0297   1542.02     0.01     964.72     0.02
 10   1.1222    -56.56     0.17    1050.47    -0.21
 11   1.1223    -58.44     0.23    1050.66    -0.18
 12   1.1250   -102.55    -0.07    1054.51    -0.15
 13   2.0891   2531.17     0.16    1961.56     0.16
 14   2.0891   2529.86    -0.02    1961.32    -0.16
 15   2.0918   2483.07    -0.11    1964.56     0.20

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.

13FQ28    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        62.481    63.023    61.980
ecceobj         0.279     0.292     0.266
incobj         25.885    25.883    25.886
qmin           44.298    43.909    44.823
qmax           82.372    83.973    80.821
amean          62.890    63.450    62.356
amin           62.244    62.801    61.721
amax           63.673    64.300    63.139
emean           0.277     0.293     0.264
emin            0.262     0.280     0.249
emax            0.294     0.306     0.280
imean          26.308    26.223    26.309
imin           25.958    25.985    25.998
imax           26.754    26.528    26.717
excite_mean     0.523     0.530     0.516
fracstop        1.000     1.000     1.000
cjmean          2.967     2.964     2.971

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     175.2     176.7
kozaiamp        180.0     180.0     179.9