Orbit Fit and Astrometric record for 15BH518

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: 15BH518   
# Created Tue Oct 24 01:38:32 2017
# Orbit generated from Bernstein formalism
# Fitting   30 observations of   30
# Arc:  11.14y
# First observation: 2004/01/28
#  Last observation: 2015/03/21
Preliminary a, adot, b, bdot, g, gdot:
  -0.028244   0.060418   0.002987  -0.006867   0.046293   0.000000
# Chi-squared of fit:    25.81 DOF:   54 RMS:  0.16
# Min/Max residuals:    -0.46    0.33
# Exact a, adot, b, bdot, g, gdot:
  2.008984E-05  5.219614E-02 -2.374325E-06 -5.854142E-03  4.065224E-02 -1.805110E-03
# Covariance matrix:
  4.8698E-13 -9.9778E-14 -1.2082E-14  7.0962E-15 -3.4269E-14 -8.5292E-14
 -9.9778E-14  4.0981E-14  5.8731E-15 -4.1131E-15  2.9497E-14  4.9821E-14
 -1.2082E-14  5.8731E-15  3.8172E-13 -3.8296E-14 -7.6903E-15  8.8194E-15
  7.0962E-15 -4.1131E-15 -3.8296E-14  4.6085E-15 -2.4562E-15 -5.6216E-15
 -3.4269E-14  2.9497E-14 -7.6903E-15 -2.4562E-15  1.1308E-13  3.3561E-14
 -8.5292E-14  4.9821E-14  8.8194E-15 -5.6216E-15  3.3561E-14  6.7824E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
   -9.241270  130.321926    0.046364   -0.157234   -0.966746  2453032.834384
# Heliocentric elements and errors
Epoch:              2453030.5000  =  2004/01/26
Mean Anomaly:          338.94407 +/-     0.005
Argument of Peri:      259.95263 +/-     0.006
Long of Asc Node:      256.17520 +/-     0.000
Inclination:            10.93339 +/-     0.000
Eccentricity:         0.09464187 +/-    0.0000
Semi-Major Axis:     28.00719370 +/-    0.0010
Time of Perihelion: 2456196.9654 +/-       0.8
Perihelion:          25.35654060 +/-    0.0011
Aphelion:            30.65784679 +/-    0.0012
Period (y)              148.2220 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -16.31323547 +/-    0.0001
Ecliptic Y           19.29037640 +/-    0.0002
Ecliptic Z           -3.95044137 +/-    0.0000
Ecliptic XDOT        -0.00256548 +/-    0.0000
Ecliptic YDOT        -0.00242097 +/-    0.0000
Ecliptic ZDOT        -0.00036948 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   25.57041768 +/-    0.0001
Geocenter to KBO     24.59889143 +/-    0.0002
# Hcoef:  7.96

The following table shows the complete astrometric record for 15BH518. 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 (15BH518) followed by the observatory code and reference code for the source of the astrometry.

2004 01  28.333641 08 41 01.21   +08 44 33.6   21.8V 15BH518   645  C~2JAT      
2004 01  28.334471 08 41 01.20   +08 44 33.6   21.6V 15BH518   645  C~2JAT      
2004 01  28.336958 08 41 01.18   +08 44 33.7   22.6V 15BH518   645  C~2JAT      
2011 05  25.27773  09 51 52.437  +01 41 42.12  22.4w 15BH518   F51  C~1vYA      
2011 05  25.28235  09 51 52.462  +01 41 41.88  22.3w 15BH518   F51  C~1vYA      
2011 05  25.28696  09 51 52.438  +01 41 41.63  22.2w 15BH518   F51  C~1vYA      
2011 10  27.60670  10 12 28.507  -00 06 14.05  22.3w 15BH518   F51  C~1vYA      
2011 10  27.61176  10 12 28.523  -00 06 14.31  22.4w 15BH518   F51  C~1vYA      
2011 10  27.62194  10 12 28.591  -00 06 15.01  22.1w 15BH518   F51  C~1vYA      
2012 01  20.48209  10 11 50.980  -00 40 13.62  22.1w 15BH518   F51  C~1vYA      
2012 01  20.49518  10 11 50.911  -00 40 13.18  21.8w 15BH518   F51  C~1vYA      
2012 01  20.50821  10 11 50.815  -00 40 13.10  22.0w 15BH518   F51  C~1vYA      
2012 06  11.26882  10 03 45.794  +00 33 35.87  22.4w 15BH518   F51  C~1vYA      
2012 06  11.27343  10 03 45.815  +00 33 35.76  22.2w 15BH518   F51  C~1vYA      
2012 06  11.27804  10 03 45.836  +00 33 35.79  22.2w 15BH518   F51  C~1vYA      
2015 01  24.55333  10 45 00.870  -04 13 50.01  22.2w 15BH518   F51  C~1vYA      
2015 01  24.56472  10 45 00.785  -04 13 49.63  22.2w 15BH518   F51  C~1vYA      
2015 01  24.58670  10 45 00.647  -04 13 49.42  22.1w 15BH518   F51  C~1vYA      
2015 01  24.59805  10 45 00.591  -04 13 49.18  22.4w 15BH518   F51  C~1vYA      
2015 02  20.43843  10 42 06.402  -04 02 07.96  22.0w 15BH518   F51  C~1vYA      
2015 02  20.45111  10 42 06.311  -04 02 07.20  22.1w 15BH518   F51  C~1vYA      
2015 02  20.46380  10 42 06.229  -04 02 06.92  22.3w 15BH518   F51  C~1vYA      
2015 03  20.35065  10 38 48.672  -03 41 36.18  22.1w 15BH518   F51  C~1vYA      
2015 03  20.36335  10 38 48.584  -03 41 35.48  22.0w 15BH518   F51  C~1vYA      
2015 03  20.37602  10 38 48.500  -03 41 35.11  22.3w 15BH518   F51  C~1vYA      
2015 03  20.42341  10 38 48.153  -03 41 32.87  22.3w 15BH518   F51  C~1vYA      
2015 03  21.38481  10 38 41.827  -03 40 45.70  22.0w 15BH518   F51  C~1vYA      
2015 03  21.39743  10 38 41.737  -03 40 44.99  21.6w 15BH518   F51  C~1vYA      
2015 03  21.40996  10 38 41.666  -03 40 44.40  22.0w 15BH518   F51  C~1vYA      
2015 03  21.42261  10 38 41.574  -03 40 43.71  21.9w 15BH518   F51  C~1vYA      

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     0.04       0.00     0.02
  2   0.0000     -0.14    -0.00      -0.04    -0.01
  3   0.0000     -0.46    -0.02      -0.02     0.02
  4   7.3209  70609.94    -0.12   -7047.03     0.24
  5   7.3209  70610.42     0.17   -7047.16     0.01
  6   7.3209  70610.12    -0.32   -7047.52    -0.46
  7   7.7461  93356.52     0.06   -8103.53     0.10
  8   7.7461  93356.89    -0.16   -8103.73     0.08
  9   7.7462  93358.31     0.09   -8104.15     0.00
 10   7.9785  93439.33     0.13  -10430.23    -0.09
 11   7.9785  93437.98     0.23  -10430.08     0.21
 12   7.9786  93436.29    -0.00  -10430.44    -0.00
 13   8.3694  83644.11    -0.04   -8011.72     0.01
 14   8.3694  83644.50    -0.03   -8011.74    -0.09
 15   8.3695  83644.84    -0.06   -8011.61    -0.05
 16  10.9903 135757.59     0.33  -15362.18    -0.12
 17  10.9904 135755.68    -0.19  -15362.14     0.04
 18  10.9904 135752.76    -0.44  -15362.54    -0.14
 19  10.9905 135751.51    -0.32  -15362.52    -0.01
 20  11.0639 131912.45     0.05  -15365.14    -0.23
 21  11.0640 131910.30    -0.04  -15364.69     0.11
 22  11.0640 131908.53     0.25  -15364.75    -0.06
 23  11.1404 127449.79     0.19  -14875.05     0.15
 24  11.1404 127447.76     0.12  -14874.66     0.24
 25  11.1404 127445.94     0.26  -14874.63    -0.04
 26  11.1406 127438.15    -0.22  -14873.70    -0.25
 27  11.1432 127293.57     0.02  -14849.40    -0.00
 28  11.1432 127291.50    -0.12  -14849.01     0.08
 29  11.1433 127289.85     0.15  -14848.67     0.11
 30  11.1433 127287.75    -0.02  -14848.31     0.16

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.

15BH518    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        27.868    27.871    27.866
ecceobj         0.089     0.089     0.089
incobj         10.926    10.926    10.926
qmin           23.486    22.512    24.810
qmax           31.304    31.416    31.818
amean          27.454    27.410    28.317
amin           26.727    26.244    27.477
amax           28.786    28.596    29.313
emean           0.095     0.122     0.089
emin            0.031     0.083     0.061
emax            0.131     0.149     0.106
imean          12.503    12.457    12.257
imin           11.770    11.927    11.553
imax           13.336    13.558    12.595
excite_mean     0.237     0.248     0.231
fracstop        0.016     0.013     0.009
cjmean          2.956     2.952     2.955

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       139.9     287.5     274.6
kozaiamp        178.0      41.9      24.6