Orbit Fit and Astrometric record for 15BD519

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: 15BD519   
# Created Fri Oct 20 01:38:37 2017
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   17
# Arc:   4.13y
# First observation: 2011/01/30
#  Last observation: 2015/03/17
Preliminary a, adot, b, bdot, g, gdot:
  -0.000094   0.019617  -0.000034   0.003572   0.022333   0.000000
# Chi-squared of fit:     2.81 DOF:   28 RMS:  0.07
# Min/Max residuals:    -0.11    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.443691E-05  1.907241E-02  2.495513E-06  3.470173E-03  2.124777E-02 -6.616714E-03
# Covariance matrix:
  4.7926E-13 -6.8314E-13  3.8007E-14 -1.1145E-13 -5.5719E-13 -7.1784E-12
 -6.8314E-13  2.3121E-12 -1.4466E-13  4.2427E-13  2.3485E-12  2.7312E-11
  3.8007E-14 -1.4466E-13  3.2534E-13 -1.0960E-13 -1.4931E-13 -1.7308E-12
 -1.1145E-13  4.2427E-13 -1.0960E-13  1.0822E-13  4.3818E-13  5.0764E-12
 -5.5719E-13  2.3485E-12 -1.4931E-13  4.3818E-13  3.1258E-12  2.8163E-11
 -7.1784E-12  2.7312E-11 -1.7308E-12  5.0764E-12  2.8163E-11  3.2679E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.232102  127.106835   -0.053664    0.021216   -0.986523  2455591.971926
# Heliocentric elements and errors
Epoch:              2455590.5000  =  2011/01/29
Mean Anomaly:          310.04254 +/-     0.081
Argument of Peri:       94.78879 +/-     0.020
Long of Asc Node:      120.56146 +/-     0.000
Inclination:            10.37744 +/-     0.000
Eccentricity:         0.34250255 +/-    0.0010
Semi-Major Axis:     55.05961918 +/-    0.0509
Time of Perihelion: 2476298.8775 +/-      17.3
Perihelion:          36.20155939 +/-    0.0642
Aphelion:            73.91767896 +/-    0.0876
Period (y)              408.5620 +/-      0.57
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -29.02165767 +/-    0.0024
Ecliptic Y           38.27887105 +/-    0.0031
Ecliptic Z            1.01209580 +/-    0.0001
Ecliptic XDOT        -0.00144095 +/-    0.0000
Ecliptic YDOT        -0.00216402 +/-    0.0000
Ecliptic ZDOT         0.00042872 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   48.04740285 +/-    0.0029
Geocenter to KBO     47.06377119 +/-    0.0039
# Hcoef:  5.84

The following table shows the complete astrometric record for 15BD519. 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 (15BD519) followed by the observatory code and reference code for the source of the astrometry.

2011 01  30.47116  08 39 20.965  +19 41 14.36  22.8w 15BD519   F51  C~1vYC      
2011 01  30.48633  08 39 20.899  +19 41 14.59  22.5w 15BD519   F51  C~1vYC      
2011 01  30.50259  08 39 20.829  +19 41 14.94  22.3w 15BD519   F51  C~1vYC      
2012 02  13.30727  08 43 04.918  +19 40 00.40  22.8w 15BD519   F51  C~1vYC      
2012 02  13.33638  08 43 04.788  +19 40 00.94  22.7w 15BD519   F51  C~1vYC      
2012 02  13.35096  08 43 04.719  +19 40 01.28  22.6w 15BD519   F51  C~1vYC      
2015 01  16.53425  08 59 40.942  +19 11 10.53  22.5w 15BD519   F51  C~1vYC      
2015 01  16.54650  08 59 40.895  +19 11 10.87  22.5w 15BD519   F51  C~1vYC      
2015 01  16.55878  08 59 40.846  +19 11 11.35  22.5w 15BD519   F51  C~1vYC      
2015 01  16.57109  08 59 40.781  +19 11 11.30  22.5w 15BD519   F51  C~1vYC      
2015 01  20.37309  08 59 24.313  +19 12 30.41  22.5w 15BD519   F51  C~1vYC      
2015 01  20.38512  08 59 24.269  +19 12 30.71  22.7w 15BD519   F51  C~1vYC      
2015 01  20.39717  08 59 24.203  +19 12 31.03  22.7w 15BD519   F51  C~1vYC      
2015 01  20.40942  08 59 24.150  +19 12 31.27  22.5w 15BD519   F51  C~1vYC      
2015 03  17.35351  08 55 34.906  +19 29 26.69  22.9w 15BD519   F51  C~1vYC      
2015 03  17.37857  08 55 34.821  +19 29 27.20  22.6w 15BD519   F51  C~1vYC      
2015 03  17.39112  08 55 34.788  +19 29 27.25  22.9w 15BD519   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    -0.05       0.00     0.02
  2   0.0000     -0.96     0.00      -0.02    -0.02
  3   0.0001     -2.01     0.04       0.07     0.04
  4   1.0372   3075.72     0.06     743.19    -0.04
  5   1.0373   3073.81     0.02     743.24    -0.04
  6   1.0373   3072.78    -0.07     743.31     0.02
  7   3.9618  17145.06    -0.06    2915.01    -0.08
  8   3.9619  17144.32     0.00    2915.15     0.03
  9   3.9619  17143.51    -0.00    2915.42     0.27
 10   3.9619  17142.64    -0.07    2915.11    -0.07
 11   3.9724  16894.81     0.03    2924.82    -0.08
 12   3.9724  16894.12     0.15    2924.93    -0.00
 13   3.9724  16893.12    -0.04    2924.97     0.01
 14   3.9725  16892.33    -0.01    2924.99     0.00
 15   4.1256  13474.54     0.07    2988.43    -0.11
 16   4.1257  13473.24    -0.09    2988.59     0.06
 17   4.1257  13472.78     0.01    2988.50    -0.02

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.

15BD519    quality flag:3

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

axisobj        55.214    55.358    55.072
ecceobj         0.341     0.344     0.339
incobj         10.367    10.367    10.367
qmin           34.858    35.499    35.590
qmax           77.295    76.624    76.831
amean          55.463    55.462    55.463
amin           54.689    54.792    54.579
amax           56.409    56.306    56.490
emean           0.356     0.339     0.347
emin            0.338     0.308     0.334
emax            0.372     0.361     0.360
imean           7.525    10.106     8.795
imin            6.550     8.741     8.598
imax            8.855    12.744     9.059
excite_mean     0.379     0.382     0.379
fracstop        1.000     1.000     1.000
cjmean          3.058     3.057     3.059

libcent 0       179.3     179.4     181.5
libamp  0       109.7      75.9     159.3
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       148.0      62.5     175.3
kozaiamp         63.1      29.2     180.0