Orbit Fit and Astrometric record for 13PU74

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: 13PU74    
# Created Fri Feb 22 02:09:37 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting  110 observations of  110
# Arc:   6.37y
# First observation: 2011/07/25
#  Last observation: 2017/12/05
# Chi-squared of fit:    67.31 DOF:  214 RMS:  0.14
# Min/Max residuals:    -0.53    0.43
# Exact a, adot, b, bdot, g, gdot:
  2.910012E-05  1.190806E-01 -5.735735E-06 -2.658894E-02  6.479906E-02 -1.970698E-02
# Covariance matrix:
  1.4432E-13 -6.4323E-14 -1.8657E-14  1.1651E-14 -8.4833E-15 -4.5960E-14
 -6.4323E-14  3.5795E-14  1.1997E-14 -7.4862E-15  6.5009E-15  2.9472E-14
 -1.8657E-14  1.1997E-14  7.1519E-14 -1.7344E-14  1.4091E-15  1.1172E-14
  1.1651E-14 -7.4862E-15 -1.7344E-14  5.4492E-15 -6.8687E-16 -7.0016E-15
 -8.4833E-15  6.5009E-15  1.4091E-15 -6.8687E-16  3.3704E-14  8.5277E-16
 -4.5960E-14  2.9472E-14  1.1172E-14 -7.0016E-15  8.5277E-16  2.7857E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.728271  -52.941588    0.092892    0.030402   -1.009532  2455767.939216
# Heliocentric elements and errors
Epoch:              2455768.5000  =  2011/07/26
Mean Anomaly:          352.78562 +/-     0.000
Argument of Peri:      200.11054 +/-     0.001
Long of Asc Node:      133.96340 +/-     0.000
Inclination:            12.70306 +/-     0.000
Eccentricity:         0.53560946 +/-    0.0000
Semi-Major Axis:     34.01386391 +/-    0.0010
Time of Perihelion: 2457220.5406 +/-       3.0
Perihelion:          15.79571648 +/-    0.0006
Aphelion:            52.23201134 +/-    0.0015
Period (y)              198.3774 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            9.83441949 +/-    0.0000
Ecliptic Y          -13.17091856 +/-    0.0000
Ecliptic Z            0.46539009 +/-    0.0000
Ecliptic XDOT         0.00353114 +/-    0.0000
Ecliptic YDOT         0.00367474 +/-    0.0000
Ecliptic ZDOT        -0.00114797 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   16.44408712 +/-    0.0000
Geocenter to KBO     15.43242941 +/-    0.0000
# Hcoef: 10.33

The following table shows the complete astrometric record for 13PU74. 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 (13PU74) followed by the observatory code and reference code for the source of the astrometry.

2011 07  25.43845  20 36 00.109  -16 50 06.66  22.6w 13PU74    F51  C~1vX1      
2011 07  25.45367  20 35 59.952  -16 50 07.31  22.5w 13PU74    F51  C~1vX1      
2011 07  25.46888  20 35 59.785  -16 50 08.12  22.3w 13PU74    F51  C~1vX1      
2011 07  25.48406  20 35 59.611  -16 50 08.94  22.6w 13PU74    F51  C~1vX1      
2011 07  26.42632  20 35 49.805  -16 50 59.68  22.2G 13PU74    F51  C~2r7Q      
2011 08  02.44388  20 34 36.247  -16 57 20.16  22.5G 13PU74    F51  C~2r7Q      
2011 08  17.31358  20 32 04.835  -17 10 42.19  22.5G 13PU74    F51  C~2r7Q      
2012 08  21.37765  21 00 56.593  -16 55 38.85  22.4w 13PU74    F51  C~1vX1      
2012 08  21.40564  21 00 56.320  -16 55 40.68  22.5w 13PU74    F51  C~1vX1      
2012 08  21.41947  21 00 56.183  -16 55 41.34  22.3w 13PU74    F51  C~1vX1      
2013 07  14.49185  21 37 37.600  -15 37 35.47  21.5G 13PU74    F51  C~2r7Q      
2013 07  14.50789  21 37 37.475  -15 37 36.17  22.2G 13PU74    F51  C~2r7Q      
2013 07  14.52335  21 37 37.362  -15 37 37.17  22.3G 13PU74    F51  C~2r7Q      
2013 07  14.53970  21 37 37.235  -15 37 38.27  22.5G 13PU74    F51  C~2r7Q      
2013 08  04.45257  21 34 22.560  -16 00 06.27  22.4w 13PU74    F51  C~1vX1      
2013 08  04.46647  21 34 22.417  -16 00 07.23  22.1w 13PU74    F51  C~1vX1      
2013 08  04.48038  21 34 22.279  -16 00 08.20  22.1w 13PU74    F51  C~1vX1      
2013 08  24.43365  21 30 57.068  -16 22 13.84  22.3G 13PU74    F51  C~2r7Q      
2013 08  24.44418  21 30 56.936  -16 22 14.72  22.0G 13PU74    F51  C~2r7Q      
2013 08  29.35702  21 30 08.094  -16 27 23.72  22.3w 13PU74    F51  C~1vX1      
2013 08  29.37085  21 30 07.948  -16 27 24.69  22.4w 13PU74    F51  C~1vX1      
2013 08  29.38468  21 30 07.806  -16 27 25.67  22.5w 13PU74    F51  C~1vX1      
2013 08  29.39848  21 30 07.673  -16 27 26.24  22.3w 13PU74    F51  C~1vX1      
2014 06  28.50893  22 09 34.975  -14 26 06.65  22.6w 13PU74    F51  C~1vX1      
2014 06  28.52102  22 09 34.914  -14 26 06.83  22.5w 13PU74    F51  C~1vX1      
2014 06  28.53312  22 09 34.897  -14 26 07.61  22.6w 13PU74    F51  C~1vX1      
2014 06  28.54517  22 09 34.835  -14 26 08.22  22.3w 13PU74    F51  C~1vX1      
2014 07  25.52182  22 06 45.037  -14 52 39.97  22.5w 13PU74    F51  C~1vX1      
2014 07  25.53393  22 06 44.933  -14 52 40.80  22.1w 13PU74    F51  C~1vX1      
2014 07  25.54604  22 06 44.823  -14 52 41.54  22.5w 13PU74    F51  C~1vX1      
2014 07  25.55815  22 06 44.715  -14 52 42.52  22.3w 13PU74    F51  C~1vX1      
2014 07  29.49476  22 06 10.535  -14 57 15.46  22.0G 13PU74    F51  C~2r7Q      
2014 07  29.50623  22 06 10.425  -14 57 16.17  22.2G 13PU74    F51  C~2r7Q      
2014 07  29.51769  22 06 10.321  -14 57 17.10  22.3G 13PU74    F51  C~2r7Q      
2014 07  29.52914  22 06 10.209  -14 57 17.85  22.0G 13PU74    F51  C~2r7Q      
2014 07  30.51771  22 06 01.343  -14 58 27.49  21.9G 13PU74    F51  C~2r7Q      
2014 07  30.52899  22 06 01.244  -14 58 28.48  21.9G 13PU74    F51  C~2r7Q      
2014 07  30.54022  22 06 01.133  -14 58 29.10  22.3G 13PU74    F51  C~2r7Q      
2014 07  30.55144  22 06 01.035  -14 58 30.03  22.5G 13PU74    F51  C~2r7Q      
2014 08  03.47089  22 05 24.882  -15 03 08.80  22.8G 13PU74    F51  C~2r7Q      
2014 08  03.48436  22 05 24.755  -15 03 09.73  22.4w 13PU74    F51  C~1vX1      
2014 08  03.49780  22 05 24.635  -15 03 10.82  22.1w 13PU74    F51  C~1vX1      
2014 08  03.51124  22 05 24.488  -15 03 11.74  22.3w 13PU74    F51  C~1vX1      
2014 08  04.47663  22 05 15.355  -15 04 21.07  22.8G 13PU74    F51  C~2r7Q      
2014 08  27.39206  22 01 24.930  -15 31 49.03  22.1w 13PU74    F51  C~1vX1      
2014 08  27.40566  22 01 24.776  -15 31 49.71  22.4w 13PU74    F51  C~1vX1      
2014 08  27.41931  22 01 24.645  -15 31 51.31  22.0w 13PU74    F51  C~1vX1      
2014 08  27.43291  22 01 24.507  -15 31 52.19  22.2w 13PU74    F51  C~1vX1      
2014 09  02.38462  22 00 24.532  -15 38 37.02  22.8G 13PU74    F51  C~2r7Q      
2014 09  18.28728  21 57 56.904  -15 54 43.86  22.1w 13PU74    F51  C~1vX1      
2014 09  18.29885  21 57 56.803  -15 54 44.37  22.2w 13PU74    F51  C~1vX1      
2014 09  18.31051  21 57 56.698  -15 54 44.84  22.3w 13PU74    F51  C~1vX1      
2014 09  18.36880  21 57 56.194  -15 54 48.27  22.4w 13PU74    F51  C~1vX1      
2014 10  27.25001  21 54 43.458  -16 15 29.37  22.5G 13PU74    F51  C~2r7Q      
2015 06  25.55986  22 39 33.080  -13 12 22.50  22.6w 13PU74    F51  C~1vX1      
2015 06  25.57098  22 39 33.087  -13 12 22.96  22.5w 13PU74    F51  C~1vX1      
2015 06  25.59333  22 39 33.012  -13 12 23.58  22.5w 13PU74    F51  C~1vX1      
2015 07  12.50746  22 38 40.345  -13 26 29.48  22.5w 13PU74    F51  C~1vX1      
2015 07  12.51862  22 38 40.299  -13 26 30.27  22.3w 13PU74    F51  C~1vX1      
2015 07  12.52977  22 38 40.247  -13 26 30.93  22.4w 13PU74    F51  C~1vX1      
2015 07  12.54091  22 38 40.184  -13 26 31.38  22.1w 13PU74    F51  C~1vX1      
2015 07  14.54608  22 38 30.045  -13 28 31.45  22.7G 13PU74    F51  C~2r7Q      
2015 07  14.55742  22 38 29.993  -13 28 32.22  23.0G 13PU74    F51  C~2r7Q      
2015 07  14.56878  22 38 29.905  -13 28 33.02  22.4G 13PU74    F51  C~2r7Q      
2015 07  14.58017  22 38 29.862  -13 28 33.89  22.2G 13PU74    F51  C~2r7Q      
2015 07  28.48383  22 36 59.644  -13 43 58.37  22.3G 13PU74    F51  C~2r7Q      
2015 07  28.49500  22 36 59.542  -13 43 59.30  22.2G 13PU74    F51  C~2r7Q      
2015 07  28.50616  22 36 59.459  -13 43 59.97  22.2G 13PU74    F51  C~2r7Q      
2015 07  28.51729  22 36 59.374  -13 44 00.96  22.2G 13PU74    F51  C~2r7Q      
2015 08  21.41650  22 33 24.717  -14 14 01.44  21.4G 13PU74    F51  C~2r7Q      
2015 08  21.42769  22 33 24.598  -14 14 02.30  22.2G 13PU74    F51  C~2r7Q      
2015 08  21.43880  22 33 24.484  -14 14 02.96  22.2G 13PU74    F51  C~2r7Q      
2015 08  21.44993  22 33 24.361  -14 14 03.98  22.1G 13PU74    F51  C~2r7Q      
2015 09  09.37129  22 30 14.101  -14 37 13.80  22.0G 13PU74    F51  C~2r7Q      
2015 09  09.38249  22 30 13.983  -14 37 14.40  22.2G 13PU74    F51  C~2r7Q      
2015 09  09.39361  22 30 13.871  -14 37 15.17  21.6G 13PU74    F51  C~2r7Q      
2015 09  09.40473  22 30 13.775  -14 37 15.99  21.5G 13PU74    F51  C~2r7Q      
2015 11  03.29551  22 24 27.736  -15 12 47.53  22.4G 13PU74    F51  C~2r7Q      
2016 07  11.55912  23 08 22.489  -12 01 30.87  22.4G 13PU74    F51  C~2r7Q      
2016 07  11.57162  23 08 22.444  -12 01 31.77  22.1G 13PU74    F51  C~2r7Q      
2016 07  11.58411  23 08 22.412  -12 01 32.28  22.4G 13PU74    F51  C~2r7Q      
2016 07  11.59660  23 08 22.360  -12 01 33.12  22.6G 13PU74    F51  C~2r7Q      
2016 08  02.51437  23 06 26.683  -12 25 37.94  22.3G 13PU74    F51  C~2r7Q      
2016 08  02.52543  23 06 26.603  -12 25 38.80  22.3G 13PU74    F51  C~2r7Q      
2016 08  02.53649  23 06 26.518  -12 25 39.68  22.2G 13PU74    F51  C~2r7Q      
2016 08  02.54753  23 06 26.426  -12 25 40.41  22.5G 13PU74    F51  C~2r7Q      
2016 08  27.45429  23 02 49.868  -12 58 09.23  21.9G 13PU74    F51  C~2r7Q      
2016 08  27.47651  23 02 49.651  -12 58 11.09  21.6G 13PU74    F51  C~2r7Q      
2016 08  27.48761  23 02 49.534  -12 58 12.00  21.5G 13PU74    F51  C~2r7Q      
2016 10  06.37600  22 56 32.940  -13 42 34.47  22.2G 13PU74    F51  C~2r7Q      
2016 10  25.25741  22 54 34.059  -13 53 20.66  22.2G 13PU74    F51  C~2r7Q      
2016 10  25.26854  22 54 34.009  -13 53 21.08  22.5G 13PU74    F51  C~2r7Q      
2016 10  25.27970  22 54 33.941  -13 53 21.11  22.5G 13PU74    F51  C~2r7Q      
2016 10  25.29089  22 54 33.903  -13 53 21.13  22.4G 13PU74    F51  C~2r7Q      
2017 07  25.58107  23 36 28.893  -10 40 14.99  21.9G 13PU74    F51  C~2r7Q      
2017 07  25.59223  23 36 28.843  -10 40 15.75  22.1G 13PU74    F51  C~2r7Q      
2017 08  18.48345  23 33 55.855  -11 09 43.91  22.5G 13PU74    F51  C~2r7Q      
2017 08  18.49463  23 33 55.759  -11 09 44.74  22.2G 13PU74    F51  C~2r7Q      
2017 08  18.50578  23 33 55.670  -11 09 45.82  22.6G 13PU74    F51  C~2r7Q      
2017 08  18.51695  23 33 55.566  -11 09 46.82  22.8G 13PU74    F51  C~2r7Q      
2017 09  15.40592  23 29 35.253  -11 46 35.76  22.0G 13PU74    F51  C~2r7Q      
2017 09  15.41703  23 29 35.110  -11 46 36.72  22.5w 13PU74    F51  C~2KWm      
2017 09  15.42822  23 29 35.019  -11 46 37.28  22.0w 13PU74    F51  C~2KWm      
2017 09  15.43932  23 29 34.882  -11 46 38.37  22.2w 13PU74    F51  C~2KWm      
2017 09  23.40592  23 28 16.666  -11 56 06.28  21.7G 13PU74    F51  C~2r7Q      
2017 09  23.41704  23 28 16.551  -11 56 07.29  21.9G 13PU74    F51  C~2r7Q      
2017 09  23.42817  23 28 16.435  -11 56 07.84  21.9G 13PU74    F51  C~2r7Q      
2017 10  11.36483  23 25 34.182  -12 13 38.03  23.1G 13PU74    F51  C~2r7Q      
2017 11  07.33814  23 22 52.128  -12 26 14.90  22.7G 13PU74    F51  C~2r7Q      
2017 12  05.26640  23 22 43.986  -12 18 56.07  22.2G 13PU74    F51  C~2r7Q      

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     0.03       0.00    -0.15
  2   0.0000      0.00     0.11       0.00     0.01
  3   0.0001      0.00     0.04       0.00     0.02
  4   0.0001      0.00    -0.15       0.00     0.01
  5   0.0027      0.00     0.08       0.00    -0.10
  6   0.0219      0.00     0.19       0.00    -0.06
  7   0.0626      0.00    -0.10       0.00    -0.07
  8   1.0758      0.00    -0.07       0.00     0.09
  9   1.0759      0.00     0.09       0.00    -0.11
 10   1.0759      0.00     0.13       0.00     0.03
 11   1.9714      0.00    -0.31       0.00    -0.09
 12   1.9714      0.00    -0.16       0.00     0.17
 13   1.9715      0.00     0.09       0.00     0.10
 14   1.9715      0.00     0.24       0.00    -0.02
 15   2.0288      0.00    -0.15       0.00     0.07
 16   2.0288      0.00    -0.13       0.00     0.04
 17   2.0289      0.00    -0.03       0.00     0.01
 18   2.0835      0.00     0.19       0.00     0.14
 19   2.0835      0.00    -0.16       0.00    -0.07
 20   2.0970      0.00     0.05       0.00    -0.07
 21   2.0970      0.00    -0.06       0.00    -0.19
 22   2.0970      0.00    -0.11       0.00    -0.31
 23   2.0971      0.00    -0.03       0.00    -0.03
 24   2.9270      0.00    -0.07       0.00    -0.19
 25   2.9270      0.00    -0.26       0.00     0.21
 26   2.9270      0.00     0.21       0.00    -0.00
 27   2.9271      0.00     0.00       0.00    -0.04
 28   3.0009      0.00    -0.00       0.00     0.05
 29   3.0009      0.00     0.01       0.00     0.05
 30   3.0010      0.00    -0.06       0.00     0.14
 31   3.0010      0.00    -0.10       0.00    -0.02
 32   3.0118      0.00     0.03       0.00     0.07
 33   3.0118      0.00    -0.04       0.00     0.16
 34   3.0119      0.00    -0.03       0.00     0.04
 35   3.0119      0.00    -0.13       0.00     0.09
 36   3.0146      0.00    -0.06       0.00     0.00
 37   3.0146      0.00     0.02       0.00    -0.19
 38   3.0147      0.00    -0.08       0.00    -0.02
 39   3.0147      0.00     0.01       0.00    -0.16
 40   3.0254      0.00     0.05       0.00    -0.04
 41   3.0255      0.00     0.10       0.00    -0.00
 42   3.0255      0.00     0.24       0.00    -0.13
 43   3.0255      0.00    -0.01       0.00    -0.09
 44   3.0282      0.00    -0.15       0.00    -0.10
 45   3.0909      0.00     0.08       0.00     0.16
 46   3.0909      0.00    -0.10       0.00     0.43
 47   3.0910      0.00     0.07       0.00    -0.22
 48   3.0910      0.00     0.13       0.00    -0.16
 49   3.1073      0.00     0.28       0.00    -0.05
 50   3.1509      0.00     0.01       0.00     0.06
 51   3.1509      0.00    -0.00       0.00     0.18
 52   3.1509      0.00    -0.06       0.00     0.34
 53   3.1511      0.00    -0.04       0.00     0.08
 54   3.2575      0.00    -0.13       0.00    -0.15
 55   3.9182      0.00    -0.27       0.00     0.13
 56   3.9182      0.00     0.09       0.00     0.12
 57   3.9183      0.00    -0.53       0.00     0.41
 58   3.9646      0.00    -0.19       0.00     0.02
 59   3.9646      0.00    -0.03       0.00    -0.10
 60   3.9647      0.00     0.04       0.00    -0.10
 61   3.9647      0.00    -0.06       0.00     0.11
 62   3.9702      0.00     0.19       0.00     0.28
 63   3.9702      0.00     0.35       0.00     0.20
 64   3.9702      0.00    -0.04       0.00     0.10
 65   3.9703      0.00     0.26       0.00    -0.08
 66   4.0083      0.00     0.09       0.00     0.03
 67   4.0084      0.00    -0.13       0.00    -0.10
 68   4.0084      0.00    -0.06       0.00     0.03
 69   4.0084      0.00    -0.02       0.00    -0.17
 70   4.0739      0.00     0.20       0.00     0.03
 71   4.0739      0.00     0.12       0.00     0.03
 72   4.0739      0.00     0.11       0.00     0.22
 73   4.0740      0.00    -0.04       0.00     0.05
 74   4.1258      0.00     0.10       0.00    -0.07
 75   4.1258      0.00     0.03       0.00     0.10
 76   4.1258      0.00     0.04       0.00     0.09
 77   4.1258      0.00     0.29       0.00     0.03
 78   4.2761      0.00     0.17       0.00    -0.02
 79   4.9641      0.00     0.02       0.00     0.07
 80   4.9641      0.00    -0.02       0.00    -0.14
 81   4.9641      0.00     0.14       0.00     0.05
 82   4.9642      0.00    -0.00       0.00    -0.10
 83   5.0242      0.00     0.14       0.00     0.06
 84   5.0242      0.00     0.17       0.00     0.02
 85   5.0242      0.00     0.13       0.00    -0.03
 86   5.0243      0.00    -0.02       0.00     0.06
 87   5.0924      0.00    -0.02       0.00    -0.02
 88   5.0925      0.00     0.06       0.00    -0.13
 89   5.0925      0.00    -0.03       0.00    -0.16
 90   5.2017      0.00     0.22       0.00    -0.15
 91   5.2534      0.00    -0.03       0.00    -0.16
 92   5.2535      0.00     0.02       0.00    -0.35
 93   5.2535      0.00    -0.20       0.00    -0.15
 94   5.2535      0.00     0.04       0.00     0.06
 95   6.0018      0.00     0.14       0.00     0.06
 96   6.0018      0.00     0.16       0.00     0.03
 97   6.0672      0.00     0.02       0.00     0.03
 98   6.0672      0.00    -0.01       0.00     0.09
 99   6.0673      0.00     0.06       0.00    -0.09
100   6.0673      0.00    -0.08       0.00    -0.20
101   6.1436      0.00     0.09       0.00     0.09
102   6.1437      0.00    -0.37       0.00    -0.04
103   6.1437      0.00    -0.03       0.00     0.23
104   6.1437      0.00    -0.40       0.00    -0.04
105   6.1656      0.00     0.11       0.00     0.11
106   6.1656      0.00     0.04       0.00    -0.14
107   6.1656      0.00    -0.04       0.00     0.07
108   6.2147      0.00    -0.05       0.00     0.04
109   6.2886      0.00     0.06       0.00    -0.05
110   6.3650      0.00    -0.02       0.00    -0.19

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.

13PU74    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        33.696    33.696    33.697
ecceobj         0.533     0.533     0.533
incobj         12.707    12.707    12.707
qmin           15.648    15.648    15.648
qmax           53.594    53.256    53.034
amean          34.021    33.762    33.908
amin           33.382    32.348    33.558
amax           34.818    34.659    34.502
emean           0.530     0.525     0.531
emin            0.518     0.500     0.522
emax            0.539     0.537     0.537
imean          12.072    12.603    11.879
imin           11.314    11.314    11.314
imax           13.091    14.520    12.618
excite_mean     0.570     0.569     0.569
fracstop        0.008     0.008     0.007
cjmean          2.650     2.652     2.650

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       215.7     215.6     214.5
kozaiamp         15.3      15.0      14.5