Orbit Fit and Astrometric record for 15BP518

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: 15BP518   
# Created Thu Oct 19 01:38:33 2017
# Orbit generated from Bernstein formalism
# Fitting   46 observations of   47
# Arc:   4.14y
# First observation: 2011/04/01
#  Last observation: 2015/05/21
Preliminary a, adot, b, bdot, g, gdot:
   0.000288   0.024611   0.000002   0.000804   0.024594   0.000000
# Chi-squared of fit:    21.19 DOF:   86 RMS:  0.12
# Min/Max residuals:    -0.38    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.575330E-05  2.512764E-02  8.982927E-07  8.146082E-04  2.510576E-02  4.235990E-03
# Covariance matrix:
  3.6613E-13 -2.5735E-13  2.3487E-15 -5.2758E-15 -1.1924E-13 -1.6799E-12
 -2.5735E-13  3.4085E-13 -4.0668E-15  9.3219E-15  2.2449E-13  2.9140E-12
  2.3487E-15 -4.0668E-15  2.5893E-13 -7.3841E-14 -2.9959E-15 -3.7502E-14
 -5.2758E-15  9.3219E-15 -7.3841E-14  2.4337E-14  8.3197E-15  8.7184E-14
 -1.1924E-13  2.2449E-13 -2.9959E-15  8.3197E-15  3.0531E-13  2.1877E-12
 -1.6799E-12  2.9140E-12 -3.7502E-14  8.7184E-14  2.1877E-12  2.6906E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   10.229223 -175.970182   -0.122504    0.176788   -0.979832  2455652.838326
# Heliocentric elements and errors
Epoch:              2455650.5000  =  2011/03/30
Mean Anomaly:           60.30878 +/-     0.013
Argument of Peri:      359.39892 +/-     0.020
Long of Asc Node:      104.86866 +/-     0.002
Inclination:            10.15376 +/-     0.000
Eccentricity:         0.18029120 +/-    0.0002
Semi-Major Axis:     43.48615076 +/-    0.0037
Time of Perihelion: 2438103.4972 +/-       2.9
Perihelion:          35.64598042 +/-    0.0094
Aphelion:            51.32632110 +/-    0.0099
Period (y)              286.7706 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -40.08193368 +/-    0.0009
Ecliptic Y           -2.94764917 +/-    0.0001
Ecliptic Z            7.07359103 +/-    0.0002
Ecliptic XDOT        -0.00024680 +/-    0.0000
Ecliptic YDOT        -0.00275832 +/-    0.0000
Ecliptic ZDOT         0.00016948 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.80791263 +/-    0.0008
Geocenter to KBO     39.83149444 +/-    0.0009
# Hcoef:  5.94

The following table shows the complete astrometric record for 15BP518. 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 (15BP518) followed by the observatory code and reference code for the source of the astrometry.

2011 04  01.33756  12 31 06.766  +07 46 59.07  22.1w 15BP518   F51  C~1vYB      
2011 04  01.39761  12 31 06.478  +07 47 00.79  22.0w 15BP518   F51  C~1vYB      
2011 04  01.41185  12 31 06.411  +07 47 01.14  22.1w 15BP518   F51  C~1vYB      
2012 04  21.42923  12 34 55.402  +07 23 40.89  22.1w 15BP518   F51  C~1vYB      
2012 04  21.44364  12 34 55.336  +07 23 41.13  22.0w 15BP518   F51  C~1vYB      
2012 04  21.45811  12 34 55.268  +07 23 41.27  22.0w 15BP518   F51  C~1vYB      
2012 04  21.47264  12 34 55.212  +07 23 41.55  22.2w 15BP518   F51  C~1vYB      
2014 02  10.49623  12 50 12.021  +05 45 11.41  21.7i 15BP518   F51  C~1w41      
2014 02  10.51004  12 50 12.006  +05 45 11.85  21.6i 15BP518   F51  C~1w41      
2014 02  26.56918  12 49 23.432  +05 53 24.67  22.2w 15BP518   F51  C~1vYB      
2014 02  26.58140  12 49 23.393  +05 53 25.13  22.3w 15BP518   F51  C~1vYB      
2014 02  26.59366  12 49 23.354  +05 53 25.54  22.2w 15BP518   F51  C~1vYB      
2014 02  26.60590  12 49 23.304  +05 53 25.97  22.4w 15BP518   F51  C~1vYB      
2014 02  27.49254  12 49 20.163  +05 53 54.60  22.3w 15BP518   F51  C~1w41      
2014 02  27.50481  12 49 20.117  +05 53 54.93  22.1w 15BP518   F51  C~1w41      
2014 02  27.51712  12 49 20.060  +05 53 55.39  22.4w 15BP518   F51  C~1w41      
2014 02  27.52945  12 49 20.033  +05 53 55.90  22.5w 15BP518   F51  C~1w41      
2014 04  04.37806  12 46 47.324  +06 12 42.53  21.8w 15BP518   F51  C~1w41      
2014 04  04.39205  12 46 47.255  +06 12 43.01  21.9w 15BP518   F51  C~1w41      
2014 04  23.30126  12 45 23.285  +06 20 28.13  21.9w 15BP518   F51  C~1w41      
2014 04  23.33770  12 45 23.131  +06 20 28.77  21.7w 15BP518   F51  C~1w41      
2014 04  29.25824  12 44 58.809  +06 22 21.58  22.1w 15BP518   F51  C~1vYB      
2014 04  29.27012  12 44 58.743  +06 22 21.59  22.1w 15BP518   F51  C~1vYB      
2014 04  29.28202  12 44 58.716  +06 22 21.94  21.9w 15BP518   F51  C~1vYB      
2014 04  29.29391  12 44 58.664  +06 22 22.01  21.9w 15BP518   F51  C~1vYB      
2015 01  21.61088  12 55 51.118  +05 05 23.70  22.3w 15BP518   F51  C~1vYB      
2015 01  21.62317  12 55 51.099  +05 05 23.70  22.3w 15BP518   F51  C~1vYB      
2015 01  21.63545  12 55 51.097  +05 05 24.04  22.2w 15BP518   F51  C~1vYB      
2015 01  21.64778  12 55 51.089  +05 05 24.41  22.4w 15BP518   F51  C~1vYB      
2015 02  18.54080  12 55 00.309  +05 17 22.17  21.9w 15BP518   F51  C~1vYB      
2015 02  18.55325  12 55 00.277  +05 17 22.57  22.0w 15BP518   F51  C~1vYB      
2015 02  18.56578  12 55 00.223  +05 17 23.01  22.2w 15BP518   F51  C~1vYB      
2015 02  18.57819  12 55 00.194  +05 17 23.21  22.3w 15BP518   F51  C~1vYB      
2015 02  19.51305  12 54 57.435  +05 17 51.74  22.0w 15BP518   F51  C~1vYB      
2015 02  19.52550  12 54 57.409  +05 17 52.22  22.2w 15BP518   F51  C~1vYB      
2015 02  19.53796  12 54 57.359  +05 17 52.57  22.0w 15BP518   F51  C~1vYB      
2015 03  23.48733  12 52 54.719  +05 34 48.09  22.2w 15BP518   F51  C~1vYB      
2015 03  23.49994  12 52 54.648  +05 34 48.52  22.2w 15BP518   F51  C~1vYB      
2015 03  23.52511  12 52 54.554  +05 34 49.38  22.0w 15BP518   F51  C~1vYB      
2015 03  24.42685  12 52 50.551  +05 35 17.56  22.4w 15BP518   F51  C~1vYB      
2015 03  24.44130  12 52 50.476  +05 35 17.75  22.2w 15BP518   F51  C~1vYB      
2015 03  24.45579  12 52 50.417  +05 35 18.43  22.2w 15BP518   F51  C~1vYB      
2015 03  24.47043  12 52 50.353  +05 35 18.85  22.2w 15BP518   F51  C~1vYB      
2015 05  21.27213  12 48 55.074  +05 54 59.15  22.8w 15BP518   F51  C~1vYB      
2015 05  21.28643  12 48 55.021  +05 54 59.32  22.0w 15BP518   F51  C~1vYB      
2015 05  21.30076  12 48 54.979  +05 54 59.03  22.4w 15BP518   F51  C~1vYB      
2015 05  21.31511  12 48 54.945  +05 54 59.59  22.2w 15BP518   F51  C~1vYB      

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     0.02       0.00    -0.08
  2   0.0002     -4.61    -0.05      -0.14    -0.12
  3   0.0002     -5.66    -0.03      -0.22    -0.17
  4   1.0571   3675.22     0.05      84.36     0.15
  5   1.0571   3674.22     0.01      84.18     0.08
  6   1.0571   3673.24    -0.01      83.91    -0.10
  7   1.0572   3672.36     0.08      83.83    -0.07
  8   2.8642  18606.30    -0.15     231.83    -0.00
  9   2.8643  18605.91     0.10     232.14     0.16
 10   2.9082  17736.15    -0.05     385.63    -0.03
 11   2.9083  17735.42    -0.01     385.81     0.07
 12   2.9083  17734.72     0.06     385.95     0.11
 13   2.9083  17733.86    -0.03     386.04     0.11
 14   2.9108  17678.98     0.10     393.01     0.29
 15   2.9108  17678.21     0.12     393.03     0.22
 16   2.9108  17677.24    -0.07     393.10     0.21
 17   2.9109  17676.66 (   0.14)    393.40 (   0.42)
 18   3.0090  15121.21    -0.07     490.96    -0.16
 19   3.0090  15120.07    -0.16     490.98    -0.11
 20   3.0608  13780.67    -0.07     404.79     0.15
 21   3.0609  13778.30     0.01     404.44     0.07
 22   3.0771  13399.57     0.02     359.62     0.16
 23   3.0772  13398.67    -0.14     359.23    -0.13
 24   3.0772  13398.15     0.09     359.39     0.13
 25   3.0772  13397.41     0.10     359.13    -0.02
 26   3.8091  24264.60     0.09     133.13     0.06
 27   3.8091  24264.34     0.05     133.01    -0.23
 28   3.8092  24264.17     0.10     133.31    -0.10
 29   3.8092  24263.91     0.06     133.60     0.02
 30   3.8856  23264.12    -0.05     477.85    -0.01
 31   3.8856  23263.51     0.02     478.02     0.04
 32   3.8856  23262.59    -0.23     478.09    -0.00
 33   3.8857  23262.10    -0.05     478.10    -0.11
 34   3.8882  23212.18    -0.17     487.20     0.01
 35   3.8883  23211.62    -0.05     487.48     0.18
 36   3.8883  23210.79    -0.19     487.49     0.08
 37   3.9758  21099.85     0.16     661.36    -0.20
 38   3.9758  21098.69    -0.05     661.32    -0.25
 39   3.9759  21097.04     0.19     661.52    -0.06
 40   3.9783  21030.29     0.10     662.68     0.10
 41   3.9784  21029.18     0.08     662.39    -0.19
 42   3.9784  21028.09     0.07     662.65     0.06
 43   3.9785  21027.03     0.12     662.64     0.05
 44   4.1367  17308.34     0.05     298.42    -0.05
 45   4.1368  17307.54    -0.14     298.25    -0.04
 46   4.1368  17307.08     0.01     297.73    -0.38
 47   4.1368  17306.39    -0.07     298.03     0.10

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.

15BP518    quality flag:3

Type:         7:4EEE    7:4EEE    7:4EEE
Type:                   7:4EII          

axisobj        43.505    43.516    43.494
ecceobj         0.181     0.182     0.181
incobj         10.150    10.150    10.150
qmin           35.043    33.388    35.326
qmax           52.976    54.667    52.459
amean          43.727    43.727    43.726
amin           43.308    43.293    43.315
amax           44.209    44.230    44.211
emean           0.168     0.200     0.145
emin            0.086     0.163     0.084
emax            0.199     0.236     0.190
imean           9.064     6.393    10.114
imin            8.173     3.126     8.298
imax           11.818     8.606    12.323
excite_mean     0.232     0.231     0.230
fracstop        1.000     1.000     1.000
cjmean          3.034     3.034     3.035

libcent 0       132.9     180.2     171.2
libamp  0       120.1      72.9     167.7
libcent 1      -180.0     142.9    -180.0
libamp  1      -180.0     109.6    -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       152.8     270.0     168.5
kozaiamp        180.0     180.0     180.0