Orbit Fit and Astrometric record for 15BC519

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: 15BC519   
# Created Fri Dec 15 02:38:07 2017
# Orbit generated from Bernstein formalism
# Fitting   24 observations of   24
# Arc:   2.09y
# First observation: 2013/02/10
#  Last observation: 2015/03/17
Preliminary a, adot, b, bdot, g, gdot:
  -0.000186   0.031337   0.000001  -0.000083   0.028072   0.000000
# Chi-squared of fit:    12.33 DOF:   42 RMS:  0.13
# Min/Max residuals:    -0.32    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.815445E-05  3.076444E-02  2.322564E-07 -7.975361E-05  2.726571E-02 -9.363623E-03
# Covariance matrix:
  3.6129E-13 -4.9044E-13 -4.3242E-17  6.3935E-16 -2.1941E-13 -4.9717E-12
 -4.9044E-13  1.5252E-12 -1.9225E-16 -1.6897E-15  6.2818E-13  2.1029E-11
 -4.3242E-17 -1.9225E-16  2.6392E-13 -1.4231E-13  3.9653E-16 -4.0186E-15
  6.3935E-16 -1.6897E-15 -1.4231E-13  9.9240E-14 -1.9547E-15 -2.1943E-14
 -2.1941E-13  6.2818E-13  3.9653E-16 -1.9547E-15  6.2916E-13  8.3973E-12
 -4.9717E-12  2.1029E-11 -4.0186E-15 -2.1943E-14  8.3973E-12  3.1226E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.761422  116.728038   -0.417785   -0.027394   -0.892931  2456333.909598
# Heliocentric elements and errors
Epoch:              2456330.5000  =  2013/02/07
Mean Anomaly:          336.22706 +/-     0.024
Argument of Peri:      324.11397 +/-     0.058
Long of Asc Node:      211.07547 +/-     0.019
Inclination:             1.72299 +/-     0.000
Eccentricity:         0.42019850 +/-    0.0006
Semi-Major Axis:     55.84004752 +/-    0.0349
Time of Perihelion: 2466395.1239 +/-       4.2
Perihelion:          32.37614327 +/-    0.0388
Aphelion:            79.30395178 +/-    0.0597
Period (y)              417.2793 +/-      0.39
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -17.26200116 +/-    0.0005
Ecliptic Y           33.35402763 +/-    0.0009
Ecliptic Z           -1.12735191 +/-    0.0000
Ecliptic XDOT        -0.00234252 +/-    0.0000
Ecliptic YDOT        -0.00222803 +/-    0.0000
Ecliptic ZDOT         0.00002103 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.57311227 +/-    0.0009
Geocenter to KBO     36.67609747 +/-    0.0011
# Hcoef:  6.64

The following table shows the complete astrometric record for 15BC519. 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 (15BC519) followed by the observatory code and reference code for the source of the astrometry.

2013 02  10.40882  07 53 36.855  +19 04 51.92  22.3w 15BC519   F51  C~1vYC      
2013 02  10.42420  07 53 36.789  +19 04 52.10  22.3w 15BC519   F51  C~1vYC      
2013 02  10.43966  07 53 36.701  +19 04 52.59  22.5w 15BC519   F51  C~1vYC      
2013 02  10.45509  07 53 36.627  +19 04 52.55  22.2w 15BC519   F51  C~1vYC      
2013 12  31.55612  08 04 44.546  +18 32 43.96  22.1w 15BC519   F51  C~1vYC      
2013 12  31.57072  08 04 44.494  +18 32 44.00  22.4w 15BC519   F51  C~1vYC      
2013 12  31.58531  08 04 44.394  +18 32 44.40  22.4w 15BC519   F51  C~1vYC      
2014 02  26.39632  07 59 47.829  +18 47 41.85  22.5w 15BC519   F51  C~1vYC      
2014 02  26.42238  07 59 47.707  +18 47 42.46  22.2w 15BC519   F51  C~1vYC      
2014 02  26.43540  07 59 47.657  +18 47 42.22  22.5w 15BC519   F51  C~1vYC      
2015 01  16.52663  08 10 49.501  +18 13 48.96  22.3w 15BC519   F51  C~1vYC      
2015 01  16.53888  08 10 49.428  +18 13 49.24  22.3w 15BC519   F51  C~1vYC      
2015 01  16.55114  08 10 49.358  +18 13 49.56  22.4w 15BC519   F51  C~1vYC      
2015 01  16.56344  08 10 49.294  +18 13 49.66  22.4w 15BC519   F51  C~1vYC      
2015 02  17.29512  08 07 57.957  +18 22 59.96  22.7w 15BC519   F51  C~1vYC      
2015 02  17.30752  08 07 57.908  +18 23 00.33  22.4w 15BC519   F51  C~1vYC      
2015 02  17.31996  08 07 57.809  +18 23 00.59  22.6w 15BC519   F51  C~1vYC      
2015 03  16.37792  08 06 14.184  +18 29 10.58  22.4w 15BC519   F51  C~1vYC      
2015 03  16.39020  08 06 14.154  +18 29 10.58  22.6w 15BC519   F51  C~1vYC      
2015 03  16.40241  08 06 14.109  +18 29 10.90  22.7w 15BC519   F51  C~1vYC      
2015 03  17.34182  08 06 11.679  +18 29 20.56  22.7w 15BC519   F51  C~1vYC      
2015 03  17.35424  08 06 11.641  +18 29 20.74  22.5w 15BC519   F51  C~1vYC      
2015 03  17.36674  08 06 11.613  +18 29 21.10  22.4w 15BC519   F51  C~1vYC      
2015 03  17.37928  08 06 11.582  +18 29 20.95  22.2w 15BC519   F51  C~1vYC      

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    -0.06       0.00    -0.06
  2   0.0000     -0.95     0.11      -0.00    -0.07
  3   0.0001     -2.27    -0.08       0.24     0.16
  4   0.0001     -3.29     0.03       0.01    -0.09
  5   0.8875   9681.28    -0.15     -22.33    -0.03
  6   0.8875   9680.54     0.25     -22.44    -0.12
  7   0.8875   9679.06    -0.11     -22.34     0.00
  8   1.0431   5364.42     0.12       8.48     0.11
  9   1.0432   5362.60    -0.12       8.74     0.33
 10   1.0432   5361.96     0.01       8.36    -0.07
 11   1.9305  15017.91     0.03     -47.90    -0.23
 12   1.9305  15016.83    -0.03     -47.84    -0.17
 13   1.9306  15015.78    -0.05     -47.74    -0.06
 14   1.9306  15014.86     0.05     -47.84    -0.15
 15   2.0175  12502.55     0.08     -24.52    -0.12
 16   2.0175  12501.79     0.21     -24.31     0.08
 17   2.0176  12500.35    -0.32     -24.35     0.02
 18   2.0916  10976.12    -0.03      31.15     0.04
 19   2.0917  10975.70     0.05      31.06    -0.07
 20   2.0917  10975.00    -0.15      31.24     0.09
 21   2.0943  10939.08     0.06      33.55     0.02
 22   2.0943  10938.51    -0.02      33.62     0.06
 23   2.0943  10938.05     0.01      33.89     0.30
 24   2.0944  10937.65     0.09      33.65     0.04

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.

15BC519    quality flag:3

Type:         5:2EEE    5:2EEE    5:2EEE

axisobj        55.631    55.717    55.546
ecceobj         0.417     0.418     0.415
incobj          1.721     1.721     1.721
qmin           31.700    31.674    31.737
qmax           80.835    80.897    80.732
amean          55.462    55.463    55.462
amin           54.665    54.597    54.662
amax           56.531    56.547    56.515
emean           0.418     0.418     0.417
emin            0.407     0.407     0.405
emax            0.430     0.431     0.429
imean           2.553     2.579     2.551
imin            2.410     2.411     2.411
imax            2.747     2.724     2.751
excite_mean     0.420     0.421     0.419
fracstop        1.000     1.000     1.000
cjmean          3.007     3.006     3.007

libcent 0       179.8     180.4     180.0
libamp  0       117.4     122.5     114.6
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       134.2     148.6     132.0
kozaiamp        180.0     180.0     180.0