Orbit Fit and Astrometric record for 15BF519

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: 15BF519   
# Created Fri Dec 14 02:10:09 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting  106 observations of  106
# Arc:   5.98y
# First observation: 2012/01/25
#  Last observation: 2018/01/16
# Chi-squared of fit:    75.11 DOF:  206 RMS:  0.15
# Min/Max residuals:    -0.38    0.45
# Exact a, adot, b, bdot, g, gdot:
  2.032834E-05  4.377813E-02 -4.837804E-06 -1.219678E-02  3.542273E-02 -8.656543E-03
# Covariance matrix:
  2.3972E-13 -1.1663E-13 -3.0458E-14  2.3456E-14 -3.2443E-14 -2.9610E-13
 -1.1663E-13  8.1482E-14  2.6403E-14 -2.0714E-14  4.6022E-14  2.6024E-13
 -3.0458E-14  2.6403E-14  1.4521E-13 -4.1803E-14  1.6487E-14  9.5500E-14
  2.3456E-14 -2.0714E-14 -4.1803E-14  1.5542E-14 -1.3852E-14 -7.5023E-14
 -3.2443E-14  4.6022E-14  1.6487E-14 -1.3852E-14  7.1817E-14  1.7108E-13
 -2.9610E-13  2.6024E-13  9.5500E-14 -7.5023E-14  1.7108E-13  9.4222E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
  -11.575492  145.783817    0.351866   -0.184606   -0.901428  2455951.917146
# Heliocentric elements and errors
Epoch:              2455952.5000  =  2012/01/26
Mean Anomaly:          334.22851 +/-     0.002
Argument of Peri:      266.03357 +/-     0.004
Long of Asc Node:      290.32844 +/-     0.000
Inclination:            19.17875 +/-     0.000
Eccentricity:         0.32076833 +/-    0.0000
Semi-Major Axis:     39.20586996 +/-    0.0016
Time of Perihelion: 2462371.4212 +/-       5.3
Perihelion:          26.62986858 +/-    0.0016
Aphelion:            51.78187133 +/-    0.0024
Period (y)              245.4906 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -23.42977205 +/-    0.0002
Ecliptic Y           16.36092529 +/-    0.0001
Ecliptic Z           -5.66485215 +/-    0.0000
Ecliptic XDOT        -0.00120872 +/-    0.0000
Ecliptic YDOT        -0.00326852 +/-    0.0000
Ecliptic ZDOT        -0.00078918 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   29.13299432 +/-    0.0002
Geocenter to KBO     28.23060008 +/-    0.0002
# Hcoef:  7.71

The following table shows the complete astrometric record for 15BF519. 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 (15BF519) followed by the observatory code and reference code for the source of the astrometry.

2012 01  25.41638  09 36 37.116  +02 00 26.23  23.2G 15BF519   F51  C~2kRR      
2012 01  25.43065  09 36 37.035  +02 00 26.32  22.3G 15BF519   F51  C~2kRR      
2012 01  25.44497  09 36 36.946  +02 00 26.72  22.4G 15BF519   F51  C~2kRR      
2012 01  25.45933  09 36 36.849  +02 00 26.85  22.2G 15BF519   F51  C~2kRR      
2012 02  12.47669  09 34 38.956  +02 06 46.23  22.5G 15BF519   F51  C~2kRR      
2013 02  21.40950  09 42 13.159  +00 41 09.97  22.4G 15BF519   F51  C~2kRR      
2014 01  31.48306  09 53 21.063  -00 59 24.24  22.3G 15BF519   F51  C~2kRR      
2014 04  17.28033  09 46 29.718  -00 19 18.27  23.3G 15BF519   F51  C~2kRR      
2014 04  24.29088  09 46 16.465  -00 15 54.75  22.4G 15BF519   F51  C~2kRR      
2014 05  04.29362  09 46 08.522  -00 11 46.86  22.5G 15BF519   F51  C~2kRR      
2014 12  01.61945  10 05 59.649  -02 21 52.03  22.5G 15BF519   F51  C~2lVs      
2014 12  08.63583  10 05 56.505  -02 25 56.17  22.4G 15BF519   F51  C~2lVs      
2015 01  21.51079  10 03 20.188  -02 34 45.73  22.1w 15BF519   F51  C~1vYD      
2015 01  21.52434  10 03 20.109  -02 34 45.73  22.0w 15BF519   F51  C~1vYD      
2015 01  21.53780  10 03 20.030  -02 34 45.65  22.3w 15BF519   F51  C~1vYD      
2015 01  21.55122  10 03 19.946  -02 34 45.45  22.2w 15BF519   F51  C~1vYD      
2015 01  26.45206  10 02 51.028  -02 33 55.80  22.2w 15BF519   F51  C~1vYD      
2015 01  26.46345  10 02 50.946  -02 33 55.47  21.9w 15BF519   F51  C~1vYD      
2015 01  26.47480  10 02 50.864  -02 33 55.48  21.7w 15BF519   F51  C~1vYD      
2015 02  17.14333  10 00 30.30   -02 26 32.0   23.0g 15BF519   W84  C~2iOU      
2015 02  17.22894  10 00 29.72   -02 26 29.6   23.0g 15BF519   W84  C~2iOU      
2015 02  17.29759  10 00 29.25   -02 26 27.6   22.7g 15BF519   W84  C~2iOU      
2015 02  17.34473  10 00 28.94   -02 26 26.3   23.1g 15BF519   W84  C~2iOU      
2015 02  18.07229  10 00 24.08   -02 26 06.0   23.1g 15BF519   W84  C~2iOU      
2015 02  18.13990  10 00 23.63   -02 26 04.0   23.1g 15BF519   W84  C~2iOU      
2015 02  18.20779  10 00 23.14   -02 26 02.0   23.1g 15BF519   W84  C~2iOU      
2015 02  18.27793  10 00 22.65   -02 26 00.0   23.0g 15BF519   W84  C~2iOU      
2015 02  20.41820  10 00 08.316  -02 24 57.77  22.0w 15BF519   F51  C~1vYD      
2015 02  20.43092  10 00 08.220  -02 24 57.29  22.0w 15BF519   F51  C~1vYD      
2015 02  20.44386  10 00 08.130  -02 24 56.97  21.8w 15BF519   F51  C~1vYD      
2015 02  20.45656  10 00 08.060  -02 24 56.63  22.2w 15BF519   F51  C~1vYD      
2015 02  22.06163  09 59 57.32   -02 24 08.5         15BF519   W84  C~2iOU      
2015 02  22.19712  09 59 56.39   -02 24 04.1         15BF519   W84  C~2iOU      
2015 02  22.26589  09 59 55.95   -02 24 02.1         15BF519   W84  C~2iOU      
2015 02  24.11376  09 59 43.62   -02 23 04.5         15BF519   W84  C~2iOU      
2015 02  24.17516  09 59 43.19   -02 23 02.9         15BF519   W84  C~2iOU      
2015 02  27.10515  09 59 23.82   -02 21 28.3         15BF519   W84  C~2iOU      
2015 02  27.17327  09 59 23.35   -02 21 25.6         15BF519   W84  C~2iOU      
2015 03  18.35790  09 57 24.743  -02 09 55.83  21.7G 15BF519   F51  C~2lVs      
2015 03  18.37088  09 57 24.681  -02 09 55.27  21.7G 15BF519   F51  C~2lVs      
2015 03  18.38381  09 57 24.602  -02 09 54.90  21.9G 15BF519   F51  C~2lVs      
2015 03  18.39673  09 57 24.531  -02 09 54.40  21.8G 15BF519   F51  C~2lVs      
2015 03  19.35405  09 57 19.178  -02 09 17.72  22.2w 15BF519   F51  C~1vYD      
2015 03  19.36699  09 57 19.115  -02 09 17.26  22.1w 15BF519   F51  C~1vYD      
2015 03  19.37991  09 57 19.044  -02 09 16.72  21.9w 15BF519   F51  C~1vYD      
2015 03  19.39289  09 57 18.969  -02 09 16.28  22.0w 15BF519   F51  C~1vYD      
2015 03  21.37757  09 57 08.110  -02 08 00.30  22.2w 15BF519   F51  C~1vYD      
2015 03  21.39019  09 57 08.040  -02 07 59.97  22.1w 15BF519   F51  C~1vYD      
2015 03  21.40276  09 57 07.976  -02 07 59.43  21.9w 15BF519   F51  C~1vYD      
2015 03  21.41525  09 57 07.892  -02 07 58.90  22.4w 15BF519   F51  C~1vYD      
2015 04  16.25565  09 55 20.448  -01 52 02.63  22.4G 15BF519   F51  C~2lVs      
2015 04  16.26758  09 55 20.404  -01 52 02.29  22.3G 15BF519   F51  C~2lVt      
2015 04  16.27952  09 55 20.369  -01 52 01.51  22.0G 15BF519   F51  C~2lVt      
2015 04  16.29140  09 55 20.341  -01 52 01.21  22.2G 15BF519   F51  C~2lVt      
2015 04  18.25552  09 55 15.186  -01 50 55.23  22.1w 15BF519   F51  C~1vYD      
2015 04  18.26783  09 55 15.147  -01 50 54.77  22.3w 15BF519   F51  C~1vYD      
2015 04  18.28016  09 55 15.104  -01 50 54.33  22.4w 15BF519   F51  C~1vYD      
2015 04  18.29251  09 55 15.098  -01 50 53.84  22.1w 15BF519   F51  C~1vYD      
2015 10  23.65199  10 12 55.707  -03 18 17.79  21.4G 15BF519   F51  C~2kRR      
2015 10  24.64086  10 13 00.972  -03 19 19.99  22.1G 15BF519   F51  C~2kRR      
2015 10  25.60909  10 13 05.995  -03 20 20.42  21.9G 15BF519   F51  C~2kRR      
2015 12  13.58041  10 14 46.913  -04 00 30.70  22.4G 15BF519   F51  C~2kRR      
2015 12  13.59319  10 14 46.898  -04 00 31.10  22.3G 15BF519   F51  C~2kRR      
2015 12  13.60597  10 14 46.879  -04 00 31.43  22.3G 15BF519   F51  C~2kRR      
2015 12  13.61876  10 14 46.862  -04 00 31.89  21.9G 15BF519   F51  C~2kRR      
2016 01  03.59058  10 13 52.715  -04 08 07.06  21.9G 15BF519   F51  C~2kRR      
2016 01  11.56551  10 13 18.568  -04 09 09.43  22.0G 15BF519   F51  C~2kRR      
2016 01  11.57894  10 13 18.505  -04 09 09.59  22.1G 15BF519   F51  C~2kRR      
2016 01  11.59229  10 13 18.444  -04 09 09.51  22.7G 15BF519   F51  C~2kRR      
2016 01  11.60564  10 13 18.381  -04 09 09.77  22.3G 15BF519   F51  C~2kRR      
2016 01  12.52438  10 13 14.022  -04 09 12.79  22.3G 15BF519   F51  C~2kRR      
2016 01  12.53653  10 13 13.964  -04 09 12.69  21.9G 15BF519   F51  C~2kRR      
2016 01  12.54860  10 13 13.907  -04 09 12.78  21.9G 15BF519   F51  C~2kRR      
2016 01  12.56067  10 13 13.849  -04 09 13.28  21.3G 15BF519   F51  C~2kRR      
2016 02  01.44187  10 11 22.544  -04 07 07.19  21.5G 15BF519   F51  C~2kRR      
2016 03  06.37410  10 07 38.504  -03 51 45.29  22.2G 15BF519   F51  C~2kRR      
2016 03  06.38663  10 07 38.427  -03 51 44.55  22.2G 15BF519   F51  C~2kRR      
2016 03  06.39918  10 07 38.349  -03 51 44.14  22.5G 15BF519   F51  C~2kRR      
2016 03  06.41176  10 07 38.248  -03 51 43.85  22.1G 15BF519   F51  C~2kRR      
2016 03  13.37989  10 06 54.650  -03 47 21.96  21.9G 15BF519   F51  C~2kRR      
2016 03  13.40216  10 06 54.512  -03 47 21.05  21.8G 15BF519   F51  C~2kRR      
2016 03  14.38034  10 06 48.609  -03 46 43.38  21.5G 15BF519   F51  C~2kRR      
2016 04  30.25763  10 03 47.089  -03 17 24.47  22.3G 15BF519   F51  C~2kRR      
2016 04  30.26879  10 03 47.076  -03 17 24.26  22.2G 15BF519   F51  C~2kRR      
2016 04  30.27991  10 03 47.045  -03 17 23.85  22.2G 15BF519   F51  C~2kRR      
2016 04  30.29102  10 03 47.033  -03 17 23.46  22.2G 15BF519   F51  C~2kRR      
2017 01  04.52762  10 22 58.452  -05 42 53.18  22.1G 15BF519   F51  C~2kRS      
2017 01  04.54005  10 22 58.400  -05 42 53.44  22.1G 15BF519   F51  C~2kRS      
2017 01  04.55245  10 22 58.352  -05 42 53.65  22.5G 15BF519   F51  C~2kRS      
2017 01  04.56485  10 22 58.301  -05 42 53.98  22.2G 15BF519   F51  C~2kRS      
2017 01  20.56409  10 21 44.383  -05 44 17.19  22.2G 15BF519   F51  C~2kRS      
2017 01  20.57662  10 21 44.327  -05 44 17.09  21.8G 15BF519   F51  C~2kRS      
2017 01  20.58914  10 21 44.252  -05 44 16.86  21.6G 15BF519   F51  C~2kRS      
2017 01  29.54477  10 20 53.003  -05 43 13.75  22.2G 15BF519   F51  C~2kRS      
2017 01  29.55788  10 20 52.925  -05 43 13.57  21.7G 15BF519   F51  C~2kRS      
2017 01  29.57098  10 20 52.840  -05 43 13.60  22.4G 15BF519   F51  C~2kRS      
2017 02  25.43417  10 17 56.862  -05 33 10.35  21.9G 15BF519   F51  C~2kRS      
2017 02  25.44657  10 17 56.779  -05 33 09.94  21.7G 15BF519   F51  C~2kRS      
2017 02  25.45898  10 17 56.699  -05 33 09.49  21.8G 15BF519   F51  C~2kRS      
2017 02  25.47138  10 17 56.607  -05 33 09.23  21.8G 15BF519   F51  C~2kRS      
2017 04  01.35832  10 14 26.110  -05 10 34.56  21.8G 15BF519   F51  C~2kRS      
2017 04  01.36962  10 14 26.055  -05 10 34.22  21.9G 15BF519   F51  C~2kRS      
2017 04  01.38094  10 14 25.996  -05 10 33.73  22.5G 15BF519   F51  C~2kRS      
2017 04  01.39223  10 14 25.941  -05 10 33.38  21.7G 15BF519   F51  C~2kRS      
2017 12  30.57244  10 32 37.605  -07 16 22.22  22.3G 15BF519   F51  C~2kRS      
2018 01  16.51584  10 31 32.079  -07 20 07.51  21.4G 15BF519   F51  C~2kRS      

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    -0.19       0.00    -0.06
  2   0.0000      0.00    -0.04       0.00    -0.20
  3   0.0001      0.00     0.00       0.00    -0.02
  4   0.0001      0.00    -0.07       0.00    -0.12
  5   0.0494      0.00     0.08       0.00     0.04
  6   1.0760      0.00    -0.22       0.00    -0.03
  7   2.0180      0.00    -0.03       0.00     0.19
  8   2.2255      0.00     0.07       0.00     0.37
  9   2.2447      0.00    -0.15       0.00    -0.06
 10   2.2721      0.00     0.34       0.00     0.04
 11   2.8507      0.00    -0.07       0.00     0.03
 12   2.8699      0.00    -0.10       0.00    -0.10
 13   2.9900      0.00     0.04       0.00     0.14
 14   2.9900      0.00     0.04       0.00     0.04
 15   2.9901      0.00     0.04       0.00     0.01
 16   2.9901      0.00    -0.04       0.00     0.10
 17   3.0035      0.00     0.04       0.00     0.02
 18   3.0036      0.00    -0.13       0.00     0.21
 19   3.0036      0.00    -0.31       0.00     0.06
 20   3.0629      0.00     0.03       0.00    -0.26
 21   3.0631      0.00     0.10       0.00    -0.24
 22   3.0633      0.00     0.08       0.00    -0.16
 23   3.0635      0.00     0.24       0.00    -0.17
 24   3.0655      0.00     0.23       0.00    -0.35
 25   3.0656      0.00     0.39       0.00    -0.27
 26   3.0658      0.00    -0.00       0.00    -0.20
 27   3.0660      0.00    -0.17       0.00    -0.20
 28   3.0719      0.00     0.17       0.00     0.08
 29   3.0719      0.00     0.04       0.00     0.19
 30   3.0719      0.00     0.01       0.00     0.12
 31   3.0720      0.00     0.27       0.00     0.08
 32   3.0764      0.00     0.18       0.00    -0.38
 33   3.0767      0.00     0.04       0.00    -0.11
 34   3.0769      0.00     0.45       0.00    -0.22
 35   3.0820      0.00     0.19       0.00    -0.05
 36   3.0822      0.00    -0.02       0.00    -0.38
 37   3.0902      0.00     0.44       0.00    -0.21
 38   3.0904      0.00     0.24       0.00     0.26
 39   3.1429      0.00    -0.25       0.00     0.02
 40   3.1429      0.00    -0.06       0.00     0.09
 41   3.1430      0.00    -0.13       0.00    -0.03
 42   3.1430      0.00    -0.08       0.00    -0.02
 43   3.1456      0.00    -0.19       0.00     0.19
 44   3.1457      0.00    -0.03       0.00     0.15
 45   3.1457      0.00     0.00       0.00     0.20
 46   3.1457      0.00    -0.02       0.00     0.15
 47   3.1512      0.00     0.05       0.00     0.28
 48   3.1512      0.00     0.04       0.00     0.13
 49   3.1512      0.00     0.12       0.00     0.18
 50   3.1513      0.00    -0.10       0.00     0.24
 51   3.2220      0.00    -0.06       0.00    -0.08
 52   3.2220      0.00    -0.21       0.00    -0.14
 53   3.2221      0.00    -0.22       0.00     0.23
 54   3.2221      0.00    -0.12       0.00     0.13
 55   3.2275      0.00     0.04       0.00     0.09
 56   3.2275      0.00    -0.06       0.00     0.14
 57   3.2276      0.00    -0.22       0.00     0.17
 58   3.2276      0.00     0.18       0.00     0.25
 59   3.7433      0.00    -0.16       0.00     0.16
 60   3.7460      0.00     0.04       0.00    -0.05
 61   3.7486      0.00    -0.22       0.00    -0.07
 62   3.8827      0.00    -0.09       0.00    -0.00
 63   3.8828      0.00    -0.06       0.00    -0.00
 64   3.8828      0.00    -0.08       0.00     0.07
 65   3.8828      0.00    -0.08       0.00     0.01
 66   3.9402      0.00     0.02       0.00     0.01
 67   3.9621      0.00    -0.11       0.00     0.03
 68   3.9621      0.00    -0.09       0.00    -0.08
 69   3.9622      0.00    -0.04       0.00     0.05
 70   3.9622      0.00    -0.02       0.00    -0.16
 71   3.9647      0.00    -0.20       0.00    -0.00
 72   3.9647      0.00    -0.18       0.00     0.13
 73   3.9648      0.00    -0.14       0.00     0.08
 74   3.9648      0.00    -0.12       0.00    -0.38
 75   4.0192      0.00    -0.00       0.00     0.26
 76   4.1121      0.00    -0.07       0.00    -0.15
 77   4.1122      0.00     0.01       0.00     0.13
 78   4.1122      0.00     0.07       0.00     0.09
 79   4.1122      0.00    -0.21       0.00    -0.08
 80   4.1313      0.00    -0.04       0.00    -0.02
 81   4.1314      0.00    -0.04       0.00     0.03
 82   4.1341      0.00     0.03       0.00    -0.12
 83   4.2624      0.00     0.06       0.00     0.09
 84   4.2624      0.00     0.09       0.00    -0.04
 85   4.2625      0.00    -0.16       0.00     0.03
 86   4.2625      0.00    -0.12       0.00     0.09
 87   4.9449      0.00     0.04       0.00     0.19
 88   4.9449      0.00    -0.02       0.00     0.09
 89   4.9449      0.00    -0.01       0.00     0.05
 90   4.9450      0.00    -0.04       0.00    -0.12
 91   4.9888      0.00     0.05       0.00    -0.00
 92   4.9888      0.00     0.25       0.00     0.06
 93   4.9888      0.00     0.15       0.00     0.26
 94   5.0134      0.00    -0.02       0.00    -0.04
 95   5.0134      0.00     0.02       0.00    -0.01
 96   5.0134      0.00    -0.04       0.00    -0.19
 97   5.0870      0.00    -0.03       0.00    -0.05
 98   5.0870      0.00     0.00       0.00    -0.04
 99   5.0870      0.00     0.08       0.00     0.01
100   5.0871      0.00    -0.02       0.00    -0.12
101   5.1826      0.00     0.00       0.00     0.04
102   5.1826      0.00     0.02       0.00    -0.10
103   5.1827      0.00    -0.03       0.00    -0.08
104   5.1827      0.00    -0.01       0.00    -0.20
105   5.9306      0.00     0.13       0.00    -0.04
106   5.9770      0.00    -0.25       0.00    -0.01

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.

15BF519    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        39.228    39.228    39.229
ecceobj         0.320     0.320     0.320
incobj         19.176    19.176    19.176
qmin           26.176    26.176    26.175
qmax           53.261    54.898    54.413
amean          39.618    39.367    39.564
amin           38.761    38.743    38.762
amax           40.702    41.537    41.143
emean           0.309     0.313     0.309
emin            0.290     0.289     0.278
emax            0.330     0.330     0.330
imean          21.797    21.477    21.802
imin           20.642    20.642    20.642
imax           22.922    22.539    22.939
excite_mean     0.484     0.482     0.483
fracstop        0.026     0.020     0.025
cjmean          2.785     2.785     2.785

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       292.1     286.9     292.3
kozaiamp         25.0      22.4      25.9