Orbit Fit and Astrometric record for 15BZ518

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: 15BZ518   
# Created Fri Oct 20 01:38:36 2017
# Orbit generated from Bernstein formalism
# Fitting   49 observations of   49
# Arc:   3.08y
# First observation: 2012/05/20
#  Last observation: 2015/06/19
Preliminary a, adot, b, bdot, g, gdot:
   0.000140   0.017197   0.000005  -0.003471   0.020118   0.000000
# Chi-squared of fit:    16.47 DOF:   92 RMS:  0.10
# Min/Max residuals:    -0.20    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.316571E-05  1.715027E-02 -2.766650E-06 -3.456785E-03  2.054439E-02 -3.214738E-03
# Covariance matrix:
  3.4336E-13 -3.2772E-13 -2.4879E-14  4.9762E-14 -2.2900E-13 -4.1655E-12
 -3.2772E-13  4.6470E-13  4.1365E-14 -8.2747E-14  3.2942E-13  6.9347E-12
 -2.4879E-14  4.1365E-14  1.8061E-13 -7.4695E-14  3.1467E-14  6.6049E-13
  4.9762E-14 -8.2747E-14 -7.4695E-14  4.6156E-14 -6.2926E-14 -1.3212E-12
 -2.2900E-13  3.2942E-13  3.1467E-14 -6.2926E-14  3.4698E-13  5.2586E-12
 -4.1655E-12  6.9347E-12  6.6049E-13 -1.3212E-12  5.2586E-12  1.1073E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.206587 -135.304256   -0.259383   -0.003573   -0.981291  2456067.872256
# Heliocentric elements and errors
Epoch:              2456060.5000  =  2012/05/13
Mean Anomaly:          260.57713 +/-     0.110
Argument of Peri:      300.26898 +/-     0.085
Long of Asc Node:       43.99248 +/-     0.000
Inclination:            11.41173 +/-     0.001
Eccentricity:         0.18589464 +/-    0.0005
Semi-Major Axis:     46.76033523 +/-    0.0103
Time of Perihelion: 2488315.6198 +/-      34.1
Perihelion:          38.06783977 +/-    0.0241
Aphelion:            55.45283069 +/-    0.0256
Period (y)              319.7604 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.11263925 +/-    0.0010
Ecliptic Y          -35.10813440 +/-    0.0010
Ecliptic Z           -0.17558890 +/-    0.0000
Ecliptic XDOT         0.00190812 +/-    0.0000
Ecliptic YDOT        -0.00131875 +/-    0.0000
Ecliptic ZDOT        -0.00045902 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   49.65389579 +/-    0.0010
Geocenter to KBO     48.67508504 +/-    0.0014
# Hcoef:  4.74

The following table shows the complete astrometric record for 15BZ518. 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 (15BZ518) followed by the observatory code and reference code for the source of the astrometry.

2012 05  20.37149  14 48 40.654  -16 26 38.73  21.7w 15BZ518   F51  C~1vYC      
2012 05  20.38609  14 48 40.595  -16 26 38.50  21.6w 15BZ518   F51  C~1vYC      
2012 05  20.40068  14 48 40.535  -16 26 38.19  21.8w 15BZ518   F51  C~1vYC      
2012 05  20.41528  14 48 40.476  -16 26 38.04  21.6w 15BZ518   F51  C~1vYC      
2013 04  12.49966  14 54 58.887  -17 05 18.90  21.5w 15BZ518   F51  C~1vYC      
2013 04  12.51350  14 54 58.843  -17 05 18.68  21.4w 15BZ518   F51  C~1vYC      
2013 04  12.52740  14 54 58.775  -17 05 18.69  21.6w 15BZ518   F51  C~1vYC      
2013 04  12.54124  14 54 58.730  -17 05 18.46  21.4w 15BZ518   F51  C~1vYC      
2013 05  05.39307  14 53 25.424  -16 59 25.06  21.4w 15BZ518   F51  C~1vYC      
2013 05  05.40789  14 53 25.368  -16 59 24.57  21.6w 15BZ518   F51  C~1vYC      
2013 05  05.42267  14 53 25.302  -16 59 24.49  21.3w 15BZ518   F51  C~1vYC      
2013 05  05.43746  14 53 25.250  -16 59 24.37  21.5w 15BZ518   F51  C~1vYC      
2014 04  29.40688  14 57 36.186  -17 29 37.45  21.4w 15BZ518   F51  C~1vYC      
2014 04  29.41747  14 57 36.139  -17 29 37.34  21.6w 15BZ518   F51  C~1vYC      
2014 04  29.42805  14 57 36.104  -17 29 37.30  21.6w 15BZ518   F51  C~1vYC      
2014 04  29.43864  14 57 36.049  -17 29 36.97  21.8w 15BZ518   F51  C~1vYC      
2014 05  23.31919  14 55 55.573  -17 23 17.34  21.6w 15BZ518   F51  C~1vYC      
2014 05  23.33046  14 55 55.529  -17 23 17.20  21.6w 15BZ518   F51  C~1vYC      
2014 05  23.34173  14 55 55.483  -17 23 16.97  21.7w 15BZ518   F51  C~1vYC      
2014 05  23.35301  14 55 55.433  -17 23 16.81  21.7w 15BZ518   F51  C~1vYC      
2015 01  24.65578  15 04 09.776  -18 05 05.29  21.7w 15BZ518   F51  C~1vYC      
2015 01  24.65866  15 04 09.787  -18 05 05.58  22.0w 15BZ518   F51  C~1vYC      
2015 01  24.66159  15 04 09.793  -18 05 05.56  22.1w 15BZ518   F51  C~1vYC      
2015 02  24.63656  15 04 27.005  -18 07 48.37  21.6w 15BZ518   F51  C~1vYC      
2015 02  24.64204  15 04 26.990  -18 07 48.24  21.7w 15BZ518   F51  C~1vYC      
2015 02  24.64753  15 04 27.000  -18 07 48.36  21.7w 15BZ518   F51  C~1vYC      
2015 02  24.65302  15 04 26.964  -18 07 48.50  21.6w 15BZ518   F51  C~1vYC      
2015 02  25.61536  15 04 26.226  -18 07 48.23  21.8w 15BZ518   F51  C~1vYC      
2015 02  25.62534  15 04 26.214  -18 07 48.31  21.7w 15BZ518   F51  C~1vYC      
2015 02  25.63530  15 04 26.191  -18 07 48.13  21.8w 15BZ518   F51  C~1vYC      
2015 02  25.64528  15 04 26.181  -18 07 47.93  21.6w 15BZ518   F51  C~1vYC      
2015 03  30.53575  15 03 17.919  -18 04 42.50  21.4i 15BZ518   F51  C~1vYC      
2015 03  30.55842  15 03 17.848  -18 04 42.43  21.3i 15BZ518   F51  C~1vYC      
2015 03  30.56973  15 03 17.809  -18 04 42.41  21.7i 15BZ518   F51  C~1vYC      
2015 05  24.41811  14 59 38.772  -17 51 38.03  21.7w 15BZ518   F51  C~1vYC      
2015 05  24.42962  14 59 38.732  -17 51 37.99  21.4w 15BZ518   F51  C~1vYC      
2015 05  24.44111  14 59 38.676  -17 51 37.79  21.5w 15BZ518   F51  C~1vYC      
2015 05  24.45261  14 59 38.630  -17 51 37.53  21.6w 15BZ518   F51  C~1vYC      
2015 05  25.37435  14 59 34.887  -17 51 23.43  21.2i 15BZ518   F51  C~1vYC      
2015 05  25.38568  14 59 34.826  -17 51 23.14  21.2i 15BZ518   F51  C~1vYC      
2015 05  25.39700  14 59 34.776  -17 51 23.05  21.2i 15BZ518   F51  C~1vYC      
2015 06  18.30163  14 58 07.276  -17 45 52.61  21.5w 15BZ518   F51  C~1vYC      
2015 06  18.31391  14 58 07.233  -17 45 52.39  21.6w 15BZ518   F51  C~1vYC      
2015 06  18.32619  14 58 07.199  -17 45 52.21  21.6w 15BZ518   F51  C~1vYC      
2015 06  18.33857  14 58 07.159  -17 45 52.20  21.6w 15BZ518   F51  C~1vYC      
2015 06  19.28855  14 58 04.215  -17 45 40.98  21.6w 15BZ518   F51  C~1vYC      
2015 06  19.30043  14 58 04.176  -17 45 40.92  21.7w 15BZ518   F51  C~1vYC      
2015 06  19.31235  14 58 04.140  -17 45 40.80  21.6w 15BZ518   F51  C~1vYC      
2015 06  19.32423  14 58 04.092  -17 45 40.62  21.8w 15BZ518   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     0.01       0.00     0.02
  2   0.0000     -0.88     0.02      -0.03     0.02
  3   0.0001     -1.80    -0.00       0.01     0.10
  4   0.0001     -2.65     0.04      -0.10     0.02
  5   0.8956   5873.98    -0.19    -638.82     0.04
  6   0.8957   5873.31    -0.06    -638.79     0.10
  7   0.8957   5872.38    -0.19    -639.08    -0.16
  8   0.8957   5871.69    -0.08    -639.05    -0.09
  9   0.9583   4487.59    -0.01    -686.22    -0.09
 10   0.9583   4486.67     0.03    -685.99     0.19
 11   0.9584   4485.74     0.04    -686.19     0.02
 12   0.9584   4485.00     0.23    -686.29    -0.04
 13   1.9412   8452.78     0.06   -1393.94    -0.01
 14   1.9413   8452.11     0.05   -1394.02    -0.07
 15   1.9413   8451.61     0.23   -1394.13    -0.15
 16   1.9413   8450.76     0.05   -1394.03    -0.03
 17   2.0067   6962.24    -0.05   -1439.75    -0.03
 18   2.0067   6961.59    -0.00   -1439.79    -0.05
 19   2.0068   6960.90    -0.01   -1439.76     0.00
 20   2.0068   6960.16    -0.05   -1439.81    -0.02
 21   2.6811  14464.34    -0.14   -1866.03     0.09
 22   2.6811  14464.57     0.01   -1866.27    -0.14
 23   2.6812  14464.65     0.01   -1866.23    -0.09
 24   2.7660  14746.84     0.18   -1955.48     0.04
 25   2.7660  14746.59    -0.00   -1955.41     0.12
 26   2.7660  14746.77     0.23   -1955.49     0.06
 27   2.7660  14746.31    -0.16   -1955.77    -0.20
 28   2.7686  14736.07     0.20   -1958.41    -0.09
 29   2.7687  14735.93     0.18   -1958.53    -0.18
 30   2.7687  14735.56    -0.06   -1958.45    -0.06
 31   2.7687  14735.37    -0.12   -1958.29     0.12
 32   2.8588  13744.03    -0.10   -2048.52     0.22
 33   2.8588  13743.03    -0.02   -2048.73     0.08
 34   2.8589  13742.49    -0.03   -2048.87    -0.03
 35   3.0090  10511.14    -0.19   -2166.82     0.09
 36   3.0091  10510.58    -0.04   -2166.94    -0.02
 37   3.0091  10509.75    -0.16   -2166.97    -0.03
 38   3.0091  10509.04    -0.16   -2166.91     0.06
 39   3.0116  10453.65     0.11   -2168.40     0.10
 40   3.0117  10452.73    -0.12   -2168.37     0.15
 41   3.0117  10452.02    -0.14   -2168.48     0.06
 42   3.0772   9156.98     0.07   -2203.96    -0.03
 43   3.0772   9156.33     0.00   -2203.93     0.03
 44   3.0772   9155.81     0.07   -2203.89     0.09
 45   3.0773   9155.26     0.10   -2204.04    -0.05
 46   3.0799   9111.66     0.07   -2205.19     0.03
 47   3.0799   9111.11     0.07   -2205.29    -0.06
 48   3.0799   9110.58     0.10   -2205.32    -0.07
 49   3.0800   9109.87    -0.06   -2205.34    -0.07

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.

15BZ518    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        46.661    46.690    46.633
ecceobj         0.188     0.190     0.187
incobj         11.427    11.427    11.428
qmin           37.564    37.525    37.619
qmax           56.820    56.904    56.675
amean          46.989    47.017    46.959
amin           46.582    46.604    46.552
amax           47.489    47.533    47.455
emean           0.182     0.184     0.181
emin            0.168     0.168     0.167
emax            0.198     0.199     0.197
imean          10.361    10.358    10.364
imin            9.828     9.827     9.827
imax           10.964    10.974    10.964
excite_mean     0.256     0.257     0.255
fracstop        1.000     1.000     1.000
cjmean          3.057     3.057     3.057

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       176.6     176.9     176.5
kozaiamp        180.0     180.0     179.9