Orbit Fit and Astrometric record for 15FK345

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: 15FK345   
# Created Sun Oct 22 01:38:34 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   27 observations of   28
# Arc:   3.30y
# First observation: 2012/02/03
#  Last observation: 2015/05/22
# Chi-squared of fit:    36.52 DOF:   48 RMS:  0.21
# Min/Max residuals:    -0.34    0.47
# Exact a, adot, b, bdot, g, gdot:
  4.420925E-05  5.051608E-01  1.477640E-06  2.174629E-02  1.810803E-01 -5.250952E-02
# Covariance matrix:
  1.5461E-12 -1.9591E-08  1.5045E-13 -1.6643E-09 -1.5713E-09 -2.5328E-08
 -1.9591E-08  3.6845E-04 -2.8774E-09  3.1469E-05  2.6191E-05  4.7861E-04
  1.5045E-13 -2.8774E-09  5.1276E-13 -2.5310E-10 -1.7391E-10 -3.7596E-09
 -1.6643E-09  3.1469E-05 -2.5310E-10  2.8002E-06  2.1294E-06  4.0964E-05
 -1.5713E-09  2.6191E-05 -1.7391E-10  2.1294E-06  4.0134E-06  3.2577E-05
 -2.5328E-08  4.7861E-04 -3.7596E-09  4.0964E-05  3.2577E-05  6.2288E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
   -5.337014  137.261347    0.054192   -0.091627   -0.980948  2455961.036396
# Heliocentric elements and errors
Epoch:              2455960.5000  =  2012/02/03
Mean Anomaly:          346.52028 +/-     0.009
Argument of Peri:      325.81045 +/-     0.191
Long of Asc Node:      197.67577 +/-     0.191
Inclination:             5.18058 +/-     0.002
Eccentricity:         0.31612928 +/-    0.0001
Semi-Major Axis:      9.26323079 +/-    0.0000
Time of Perihelion: 2456346.0854 +/-       0.2
Perihelion:           6.33485229 +/-    0.0008
Aphelion:            12.19160929 +/-    0.0008
Period (y)               28.1937 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -4.72228500 +/-    0.0000
Ecliptic Y            4.44129583 +/-    0.0000
Ecliptic Z           -0.51366047 +/-    0.0000
Ecliptic XDOT        -0.00462987 +/-    0.0000
Ecliptic YDOT        -0.00612098 +/-    0.0000
Ecliptic ZDOT         0.00040131 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO    6.50302049 +/-    0.0000
Geocenter to KBO      5.52247185 +/-    0.0000
# Hcoef: 13.98

The following table shows the complete astrometric record for 15FK345. 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 (15FK345) followed by the observatory code and reference code for the source of the astrometry.

2012 02  03.53563  09 12 15.464  +10 34 13.70  21.6i 15FK345   F51  C~1vYV      
2012 02  03.54852  09 12 15.152  +10 34 15.09  21.5i 15FK345   F51  C~1vYV      
2012 02  03.58203  09 12 14.349  +10 34 18.89  21.8r 15FK345   F51  C~1vYV      
2013 03  05.42826  10 56 53.007  +03 03 55.66  21.9w 15FK345   F51  C~1vYV      
2013 03  05.44321  10 56 52.678  +03 03 58.33  22.1w 15FK345   F51  C~1vYV      
2013 03  05.45816  10 56 52.329  +03 04 00.64  21.9w 15FK345   F51  C~1vYV      
2014 04  29.30507  12 32 31.373  -03 59 50.94  22.3w 15FK345   F51  C~1vYV      
2014 04  29.31703  12 32 31.167  -03 59 49.64  22.1w 15FK345   F51  C~1vYV      
2014 04  29.32899  12 32 30.984  -03 59 48.11  22.1w 15FK345   F51  C~1vYV      
2014 04  29.34098  12 32 30.785  -03 59 46.34  22.2w 15FK345   F51  C~1vYV      
2015 03  18.52586  14 29 17.598  -13 01 48.48  22.4w 15FK345   F51  C~1vYV      
2015 03  18.53866  14 29 17.443  -13 01 47.02  22.4w 15FK345   F51  C~1vYV      
2015 03  18.55137  14 29 17.292  -13 01 46.20  22.6w 15FK345   F51  C~1vYV      
2015 03  19.50741  14 29 05.838  -13 00 19.07  22.5w 15FK345   F51  C~1vYV      
2015 03  19.51998  14 29 05.657  -13 00 18.01  22.5w 15FK345   F51  C~1vYV      
2015 03  19.53677  14 29 05.460  -13 00 16.38  22.4w 15FK345   F51  C~1vYV      
2015 03  19.56265  14 29 05.113  -13 00 13.78  22.4w 15FK345   F51  C~1vYV      
2015 04  23.39143  14 18 31.764  -11 50 55.11  21.9w 15FK345   F51  C~1vYV      
2015 04  23.40393  14 18 31.486  -11 50 53.38  22.3w 15FK345   F51  C~1vYV      
2015 04  23.41644  14 18 31.195  -11 50 51.70  21.9w 15FK345   F51  C~1vYV      
2015 04  23.42893  14 18 30.921  -11 50 50.22  22.0w 15FK345   F51  C~1vYV      
2015 04  24.47712  14 18 08.188  -11 48 30.25  21.8w 15FK345   F51  C~1vYV      
2015 04  24.48926  14 18 07.908  -11 48 28.49  22.0w 15FK345   F51  C~1vYV      
2015 04  24.50138  14 18 07.653  -11 48 27.04  22.2w 15FK345   F51  C~1vYV      
2015 04  24.51348  14 18 07.392  -11 48 25.39  22.3w 15FK345   F51  C~1vYV      
2015 05  22.37561  14 08 43.251  -10 51 27.71  22.2w 15FK345   F51  C~1vYV      
2015 05  22.38890  14 08 43.012  -10 51 26.24  22.4w 15FK345   F51  C~1vYV      
2015 05  22.40215  14 08 42.785  -10 51 24.81  22.5w 15FK345   F51  C~1vYV      

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 (  -0.74)      0.00 (   4.30)
  2   0.0000      0.00     0.24       0.00    -0.10
  3   0.0001      0.00     0.23       0.00    -0.16
  4   1.0839      0.00     0.27       0.00    -0.27
  5   1.0839      0.00     0.43       0.00    -0.01
  6   1.0840      0.00     0.29       0.00    -0.12
  7   2.2335      0.00     0.15       0.00     0.05
  8   2.2335      0.00     0.00       0.00    -0.21
  9   2.2335      0.00     0.19       0.00    -0.24
 10   2.2336      0.00     0.16       0.00    -0.03
 11   3.1184      0.00     0.05       0.00     0.00
 12   3.1184      0.00     0.09       0.00     0.31
 13   3.1185      0.00     0.18       0.00    -0.01
 14   3.1211      0.00     0.24       0.00    -0.09
 15   3.1211      0.00    -0.06       0.00    -0.18
 16   3.1212      0.00     0.21       0.00    -0.10
 17   3.1212      0.00    -0.01       0.00     0.11
 18   3.2166      0.00     0.33       0.00    -0.10
 19   3.2166      0.00     0.33       0.00    -0.03
 20   3.2166      0.00     0.13       0.00    -0.02
 21   3.2167      0.00     0.19       0.00    -0.20
 22   3.2196      0.00     0.29       0.00    -0.29
 23   3.2196      0.00     0.14       0.00    -0.16
 24   3.2196      0.00     0.36       0.00    -0.34
 25   3.2197      0.00     0.47       0.00    -0.31
 26   3.2959      0.00     0.27       0.00    -0.11
 27   3.2960      0.00     0.22       0.00    -0.01
 28   3.2960      0.00     0.34       0.00     0.05

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.

15FK345    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj         9.268     9.268     9.268
ecceobj         0.312     0.312     0.312
incobj          5.168     5.168     5.168
qmin            6.381     6.381     6.381
qmax           13.097    13.097    13.096
amean           9.520     9.520     9.520
amin            9.268     9.268     9.268
amax            9.837     9.837     9.837
emean           0.313     0.313     0.313
emin            0.295     0.295     0.295
emax            0.331     0.331     0.331
imean           5.304     5.305     5.305
imin            5.083     5.083     5.083
imax            5.423     5.423     5.423
excite_mean     0.326     0.326     0.326
fracstop        0.000     0.000     0.000
cjmean          4.226     4.226     4.226

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       125.8     125.8     125.8
kozaiamp        158.0     158.0     158.0