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 Nov 16 02:09:59 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting  103 observations of  103
# Arc:   8.02y
# First observation: 2010/05/10
#  Last observation: 2018/05/19
# Chi-squared of fit:    39.98 DOF:  200 RMS:  0.11
# Min/Max residuals:    -0.27    0.36
# Exact a, adot, b, bdot, g, gdot:
  1.344201E-05  1.695588E-02 -2.219677E-06 -3.414854E-03  2.042532E-02 -3.090806E-03
# Covariance matrix:
  3.3535E-13 -1.4009E-13 -4.3222E-14  2.3558E-14 -7.3643E-14 -7.6990E-13
 -1.4009E-13  6.8385E-14  2.3189E-14 -1.2635E-14  3.4628E-14  4.1300E-13
 -4.3222E-14  2.3189E-14  1.2063E-13 -2.5749E-14  1.2657E-14  1.5005E-13
  2.3558E-14 -1.2635E-14 -2.5749E-14  7.0600E-15 -6.9403E-15 -8.1762E-14
 -7.3643E-14  3.4628E-14  1.2657E-14 -6.9403E-15  7.2552E-14  2.2612E-13
 -7.6990E-13  4.1300E-13  1.5005E-13 -8.1762E-14  2.2612E-13  2.6725E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.192732 -137.076088   -0.110939    0.003328   -1.004671  2455326.892786
# Heliocentric elements and errors
Epoch:              2455326.5000  =  2010/05/10
Mean Anomaly:          259.71868 +/-     0.020
Argument of Peri:      299.20289 +/-     0.014
Long of Asc Node:       43.99311 +/-     0.000
Inclination:            11.40096 +/-     0.000
Eccentricity:         0.18740681 +/-    0.0001
Semi-Major Axis:     46.90558560 +/-    0.0023
Time of Perihelion: 2488011.8262 +/-       9.2
Perihelion:          38.11515954 +/-    0.0042
Aphelion:            55.69601165 +/-    0.0047
Period (y)              321.2514 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -36.50596634 +/-    0.0005
Ecliptic Y          -34.11018751 +/-    0.0004
Ecliptic Z            0.16461883 +/-    0.0000
Ecliptic XDOT         0.00185182 +/-    0.0000
Ecliptic YDOT        -0.00137721 +/-    0.0000
Ecliptic ZDOT        -0.00045917 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   49.96227822 +/-    0.0005
Geocenter to KBO     48.95899382 +/-    0.0006
# Hcoef:  4.80

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.

2010 05  10.39202  14 42 08.244  -15 32 02.16  21.5G 15BZ518   F51  C~2ji4      
2011 04  13.44851  14 47 36.055  -16 08 10.79  21.6G 15BZ518   F51  C~2ji4      
2011 04  13.45883  14 47 36.024  -16 08 10.39  21.3G 15BZ518   F51  C~2ji4      
2011 04  14.49604  14 47 32.009  -16 07 54.92  21.3G 15BZ518   F51  C~2ji4      
2011 04  14.50762  14 47 31.959  -16 07 54.76  22.1G 15BZ518   F51  C~2ji4      
2011 07  04.27706  14 42 45.737  -15 49 04.78  21.1G 15BZ518   F51  C~2ji4      
2012 02  09.65962  14 53 24.892  -16 43 50.59  21.8G 15BZ518   F51  C~2ji4      
2012 05  14.40933  14 49 05.053  -16 28 15.16  22.0G 15BZ518   F51  C~2ji4      
2012 05  14.41963  14 49 05.004  -16 28 14.91  21.3G 15BZ518   F51  C~2ji4      
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      
2013 05  18.39563  14 52 30.862  -16 55 53.90  21.0G 15BZ518   F51  C~2ji4      
2013 05  18.40723  14 52 30.812  -16 55 53.86  21.8G 15BZ518   F51  C~2ji4      
2013 06  04.35808  14 51 24.586  -16 51 36.32  21.7G 15BZ518   F51  C~2ji4      
2013 06  04.36566  14 51 24.558  -16 51 36.60  21.7G 15BZ518   F51  C~2ji4      
2014 04  05.48114  14 59 10.001  -17 35 17.95  21.7G 15BZ518   F51  C~2ji4      
2014 04  05.49302  14 59 09.962  -17 35 17.80  21.5G 15BZ518   F51  C~2ji4      
2014 04  05.50493  14 59 09.918  -17 35 17.67  21.7G 15BZ518   F51  C~2ji4      
2014 04  05.51682  14 59 09.874  -17 35 17.47  21.5G 15BZ518   F51  C~2ji4      
2014 04  23.47418  14 58 00.870  -17 31 08.91  21.5G 15BZ518   F51  C~2ji4      
2014 04  23.48478  14 58 00.812  -17 31 08.34  21.3G 15BZ518   F51  C~2ji4      
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  23.65286  15 04 27.686  -18 07 48.36  22.2G 15BZ518   F51  C~2ji4      
2015 02  23.65551  15 04 27.687  -18 07 48.23  22.1G 15BZ518   F51  C~2ji4      
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      
2015 06  23.31592  14 57 52.268  -17 44 55.91  21.4G 15BZ518   F51  C~2ji4      
2015 06  23.32733  14 57 52.224  -17 44 56.06  22.0G 15BZ518   F51  C~2ji4      
2015 06  23.35017  14 57 52.172  -17 44 55.27  22.2G 15BZ518   F51  C~2ji4      
2016 03  07.58668  15 08 01.644  -18 35 17.76  21.3G 15BZ518   F51  C~2ji4      
2016 03  07.59770  15 08 01.631  -18 35 17.84  21.4G 15BZ518   F51  C~2ji4      
2016 03  07.60869  15 08 01.611  -18 35 17.85  21.6G 15BZ518   F51  C~2ji4      
2016 03  07.61968  15 08 01.598  -18 35 17.72  21.8G 15BZ518   F51  C~2ji4      
2016 03  07.62941  15 08 01.570  -18 35 17.85  22.0G 15BZ518   F51  C~2ji4      
2016 04  01.56702  15 06 59.150  -18 32 22.88  21.8G 15BZ518   F51  C~2ji4      
2016 04  01.57824  15 06 59.114  -18 32 22.83  21.3G 15BZ518   F51  C~2ji4      
2016 04  01.58947  15 06 59.079  -18 32 22.65  21.9G 15BZ518   F51  C~2ji4      
2016 04  01.60071  15 06 59.033  -18 32 22.47  21.5G 15BZ518   F51  C~2ji4      
2016 05  07.44745  15 04 37.574  -18 24 19.46  21.6G 15BZ518   F51  C~2ji4      
2016 05  07.45855  15 04 37.524  -18 24 19.28  21.6G 15BZ518   F51  C~2ji4      
2016 05  07.46964  15 04 37.470  -18 24 19.14  21.7G 15BZ518   F51  C~2ji4      
2016 05  07.48071  15 04 37.420  -18 24 18.90  21.4G 15BZ518   F51  C~2ji4      
2017 04  05.49374  15 10 40.124  -18 59 49.60  21.6G 15BZ518   F51  C~2ji4      
2017 04  05.49439  15 10 40.106  -18 59 49.30  21.4G 15BZ518   F51  C~2ji4      
2017 04  05.51666  15 10 40.019  -18 59 49.12  21.7G 15BZ518   F51  C~2ji4      
2017 04  05.52715  15 10 39.982  -18 59 49.07  21.5G 15BZ518   F51  C~2ji4      
2017 04  05.52779  15 10 39.987  -18 59 49.01  21.6G 15BZ518   F51  C~2ji4      
2017 04  26.48728  15 09 18.906  -18 55 25.71  21.4G 15BZ518   F51  C~2ji4      
2017 04  26.49851  15 09 18.865  -18 55 25.56  21.7G 15BZ518   F51  C~2ji4      
2017 04  26.50970  15 09 18.813  -18 55 25.32  21.4G 15BZ518   F51  C~2ji4      
2017 04  26.52092  15 09 18.762  -18 55 25.19  21.6G 15BZ518   F51  C~2ji4      
2017 05  19.41151  15 07 40.416  -18 49 42.53  21.3G 15BZ518   F51  C~2ji4      
2017 05  19.42289  15 07 40.365  -18 49 42.36  21.6G 15BZ518   F51  C~2ji4      
2017 05  19.43428  15 07 40.318  -18 49 42.12  21.6G 15BZ518   F51  C~2ji4      
2017 05  19.44571  15 07 40.275  -18 49 42.07  21.4G 15BZ518   F51  C~2ji4      
2018 05  19.42554  15 11 37.437  -19 18 04.58  21.6G 15BZ518   F51  C~2ji4      
2018 05  19.43743  15 11 37.394  -19 18 04.27  21.6G 15BZ518   F51  C~2ji4      
2018 05  19.44935  15 11 37.339  -19 18 04.02  21.3G 15BZ518   F51  C~2ji4      
2018 05  19.46125  15 11 37.279  -19 18 04.23  21.6G 15BZ518   F51  C~2ji4      

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    -0.09       0.00    -0.06
  2   0.9255      0.00     0.04       0.00    -0.05
  3   0.9256      0.00     0.18       0.00     0.20
  4   0.9284      0.00     0.03       0.00    -0.11
  5   0.9284      0.00    -0.03       0.00    -0.13
  6   1.1496      0.00     0.12       0.00     0.13
  7   1.7530      0.00    -0.02       0.00     0.03
  8   2.0124      0.00    -0.03       0.00    -0.07
  9   2.0124      0.00    -0.12       0.00     0.01
 10   2.0287      0.00     0.00       0.00     0.02
 11   2.0287      0.00     0.02       0.00     0.02
 12   2.0288      0.00     0.02       0.00     0.10
 13   2.0288      0.00     0.03       0.00     0.01
 14   2.9243      0.00    -0.13       0.00     0.07
 15   2.9244      0.00     0.01       0.00     0.09
 16   2.9244      0.00    -0.20       0.00    -0.12
 17   2.9244      0.00    -0.06       0.00    -0.08
 18   2.9870      0.00     0.01       0.00    -0.10
 19   2.9870      0.00     0.12       0.00     0.15
 20   2.9871      0.00     0.09       0.00    -0.01
 21   2.9871      0.00     0.26       0.00    -0.13
 22   3.0226      0.00     0.01       0.00     0.23
 23   3.0226      0.00    -0.01       0.00     0.08
 24   3.0690      0.00    -0.09       0.00     0.31
 25   3.0691      0.00    -0.09       0.00    -0.08
 26   3.9044      0.00    -0.08       0.00    -0.01
 27   3.9045      0.00    -0.03       0.00    -0.00
 28   3.9045      0.00    -0.05       0.00    -0.02
 29   3.9045      0.00    -0.07       0.00     0.04
 30   3.9537      0.00     0.07       0.00    -0.12
 31   3.9537      0.00    -0.14       0.00     0.29
 32   3.9699      0.00     0.10       0.00    -0.05
 33   3.9700      0.00     0.08       0.00    -0.11
 34   3.9700      0.00     0.23       0.00    -0.23
 35   3.9700      0.00     0.09       0.00    -0.07
 36   4.0354      0.00    -0.00       0.00    -0.04
 37   4.0354      0.00     0.04       0.00    -0.08
 38   4.0355      0.00     0.05       0.00    -0.02
 39   4.0355      0.00    -0.00       0.00    -0.04
 40   4.7098      0.00    -0.10       0.00     0.11
 41   4.7098      0.00    -0.01       0.00    -0.15
 42   4.7098      0.00    -0.00       0.00    -0.10
 43   4.7920      0.00    -0.12       0.00    -0.08
 44   4.7920      0.00    -0.08       0.00     0.05
 45   4.7946      0.00     0.20       0.00    -0.03
 46   4.7947      0.00     0.04       0.00     0.10
 47   4.7947      0.00     0.26       0.00    -0.02
 48   4.7947      0.00    -0.21       0.00    -0.16
 49   4.7973      0.00     0.19       0.00    -0.15
 50   4.7974      0.00     0.14       0.00    -0.23
 51   4.7974      0.00    -0.07       0.00    -0.06
 52   4.7974      0.00    -0.08       0.00     0.14
 53   4.8875      0.00    -0.02       0.00     0.23
 54   4.8875      0.00     0.01       0.00     0.07
 55   4.8876      0.00    -0.02       0.00    -0.03
 56   5.0377      0.00    -0.13       0.00     0.12
 57   5.0377      0.00    -0.01       0.00    -0.02
 58   5.0378      0.00    -0.13       0.00     0.00
 59   5.0378      0.00    -0.11       0.00     0.09
 60   5.0403      0.00     0.17       0.00     0.05
 61   5.0404      0.00    -0.04       0.00     0.16
 62   5.0404      0.00    -0.08       0.00     0.08
 63   5.1058      0.00     0.11       0.00    -0.06
 64   5.1059      0.00     0.06       0.00     0.01
 65   5.1059      0.00     0.14       0.00     0.05
 66   5.1059      0.00     0.13       0.00    -0.09
 67   5.1085      0.00     0.12       0.00    -0.01
 68   5.1086      0.00     0.10       0.00    -0.09
 69   5.1086      0.00     0.12       0.00    -0.11
 70   5.1086      0.00    -0.04       0.00    -0.07
 71   5.1196      0.00    -0.09       0.00     0.02
 72   5.1196      0.00    -0.25       0.00    -0.25
 73   5.1197      0.00    -0.03       0.00     0.29
 74   5.8267      0.00    -0.13       0.00     0.10
 75   5.8267      0.00    -0.04       0.00    -0.02
 76   5.8267      0.00    -0.06       0.00    -0.06
 77   5.8268      0.00     0.02       0.00     0.03
 78   5.8268      0.00    -0.15       0.00    -0.13
 79   5.8951      0.00    -0.06       0.00     0.01
 80   5.8951      0.00    -0.04       0.00    -0.06
 81   5.8951      0.00     0.00       0.00     0.01
 82   5.8952      0.00    -0.12       0.00     0.07
 83   5.9933      0.00    -0.04       0.00    -0.02
 84   5.9933      0.00    -0.06       0.00    -0.01
 85   5.9934      0.00    -0.14       0.00    -0.04
 86   5.9934      0.00    -0.17       0.00     0.02
 87   6.9051      0.00     0.36       0.00    -0.27
 88   6.9051      0.00     0.13       0.00     0.03
 89   6.9052      0.00    -0.00       0.00    -0.03
 90   6.9052      0.00    -0.01       0.00    -0.09
 91   6.9052      0.00     0.10       0.00    -0.04
 92   6.9626      0.00    -0.06       0.00     0.00
 93   6.9626      0.00     0.04       0.00    -0.01
 94   6.9627      0.00    -0.02       0.00     0.07
 95   6.9627      0.00    -0.07       0.00     0.04
 96   7.0254      0.00    -0.03       0.00     0.01
 97   7.0254      0.00    -0.06       0.00     0.01
 98   7.0254      0.00    -0.02       0.00     0.07
 99   7.0255      0.00     0.08       0.00    -0.05
100   8.0247      0.00    -0.07       0.00     0.07
101   8.0248      0.00     0.07       0.00     0.20
102   8.0248      0.00     0.03       0.00     0.27
103   8.0248      0.00    -0.09       0.00    -0.12

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        46.665    46.665    46.665
ecceobj         0.189     0.188     0.189
incobj         11.428    11.428    11.428
qmin           37.542    37.543    37.542
qmax           56.779    56.825    56.797
amean          46.991    46.995    46.991
amin           46.568    46.585    46.583
amax           47.492    47.491    47.499
emean           0.182     0.183     0.183
emin            0.168     0.168     0.168
emax            0.198     0.198     0.198
imean          10.361    10.361    10.361
imin            9.830     9.832     9.833
imax           10.968    10.964    10.968
excite_mean     0.256     0.256     0.256
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       176.5     176.5     176.6
kozaiamp        179.9     179.9     179.9