Orbit Fit and Astrometric record for 04PY117

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: 04PY117   
# Created Sun Apr 21 01:08:29 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting  102 observations of  102
# Arc:  13.10y
# First observation: 2004/08/15
#  Last observation: 2017/09/21
# Chi-squared of fit:    59.94 DOF:  198 RMS:  0.14
# Min/Max residuals:    -0.77    0.37
# Exact a, adot, b, bdot, g, gdot:
  1.799197E-05  4.137654E-02 -8.718965E-06 -1.800442E-02  3.497919E-02  4.783398E-03
# Covariance matrix:
  1.1832E-13 -2.5772E-14 -1.1197E-14  7.4210E-15 -1.8476E-14 -3.2091E-14
 -2.5772E-14  1.2511E-14  7.6013E-15 -4.9960E-15  2.2051E-15  2.1665E-14
 -1.1197E-14  7.6013E-15  9.3594E-14 -1.1651E-14  4.5110E-16  1.4258E-14
  7.4210E-15 -4.9960E-15 -1.1651E-14  3.0931E-15 -5.6098E-16 -9.3626E-15
 -1.8476E-14  2.2051E-15  4.5110E-16 -5.6098E-16  6.5112E-14  2.0485E-15
 -3.2091E-14  2.1665E-14  1.4258E-14 -9.3626E-15  2.0485E-15  4.0613E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.896341  -48.319351   -0.197311   -0.015545   -0.997369  2453232.854003
# Heliocentric elements and errors
Epoch:              2453233.0000  =  2004/08/15
Mean Anomaly:           16.66888 +/-     0.002
Argument of Peri:      151.96379 +/-     0.002
Long of Asc Node:      130.07360 +/-     0.000
Inclination:            23.58145 +/-     0.000
Eccentricity:         0.27940811 +/-    0.0000
Semi-Major Axis:     39.83631329 +/-    0.0018
Time of Perihelion: 2448980.7281 +/-       0.5
Perihelion:          28.70572431 +/-    0.0016
Aphelion:            50.96690227 +/-    0.0025
Period (y)              251.4357 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           19.81529339 +/-    0.0001
Ecliptic Y          -21.96116946 +/-    0.0002
Ecliptic Z           -0.44744050 +/-    0.0000
Ecliptic XDOT         0.00265113 +/-    0.0000
Ecliptic YDOT         0.00188345 +/-    0.0000
Ecliptic ZDOT        -0.00141480 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   29.58268310 +/-    0.0001
Geocenter to KBO     28.58840180 +/-    0.0002
# Hcoef:  7.22

The following table shows the complete astrometric record for 04PY117. 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 (04PY117) followed by the observatory code and reference code for the source of the astrometry.

2004 08  15.35326  20 57 36.44   -18 08 37.3   21.6g 04PY117   568  C~0X5Y      
2004 08  15.38455  20 57 36.23   -18 08 38.5   22.3g 04PY117   568  C~0X5Y      
2004 08  15.41660  20 57 36.03   -18 08 39.7   21.9g 04PY117   568  C~0X5Y      
2004 08  16.32469  20 57 30.31   -18 09 12.7   21.6g 04PY117   568  C~0X5Y      
2004 10  04.26385  20 53 42.67   -18 32 14.4   21.7i 04PY117   568  C~0X5Y      
2004 10  04.31600  20 53 42.56   -18 32 15.4   22.2i 04PY117   568  C~0X5Y      
2004 10  04.36845  20 53 42.42   -18 32 16.4   21.5i 04PY117   568  C~0X5Y      
2005 07  12.25410  21 11 54.27   -18 05 24.8   21.7R 04PY117   809  C~0X5Y      
2005 07  12.30376  21 11 54.00   -18 05 26.7   22.1R 04PY117   809  C~0X5Y      
2005 07  12.35372  21 11 53.71   -18 05 28.5   21.7R 04PY117   809  C~0X5Y      
2005 07  13.23387  21 11 48.78   -18 06 01.1   22.9R 04PY117   809  C~0X5Y      
2005 08  03.19430  21 09 40.78   -18 19 22.3         04PY117   309  C~0X5Y      
2005 08  03.28468  21 09 40.20   -18 19 25.8         04PY117   309  C~0X5Y      
2005 08  03.34141  21 09 39.83   -18 19 27.9         04PY117   309  C~0X5Y      
2006 05  02.48097  21 24 31.13   -17 53 48.4   20.8r 04PY117   695  C~0X5Y      
2006 05  04.47973  21 24 36.28   -17 53 55.4   20.7r 04PY117   695  C~0X5Y      
2009 06  20.40298  21 55 05.70   -18 38 52.3         04PY117   695  C~0X5Y      
2009 06  20.44233  21 55 05.60   -18 38 53.5         04PY117   695  C~0X5Y      
2009 06  22.39729  21 55 00.52   -18 39 58.9         04PY117   695  C~0X5Y      
2011 07  27.47499  22 12 50.966  -19 12 38.33  21.8G 04PY117   F51  C~2r7D      
2011 07  27.48970  22 12 50.904  -19 12 39.06  21.8G 04PY117   F51  C~2r7D      
2011 07  27.50438  22 12 50.820  -19 12 39.87  22.3G 04PY117   F51  C~2r7D      
2011 07  27.51907  22 12 50.742  -19 12 40.59  21.8G 04PY117   F51  C~2r7D      
2011 08  30.43035  22 09 31.551  -19 37 05.74  21.8G 04PY117   F51  C~2r7D      
2011 08  30.44508  22 09 31.459  -19 37 06.03  22.2G 04PY117   F51  C~2r7D      
2012 08  17.44633  22 20 46.496  -19 30 51.02  21.5G 04PY117   F51  C~2r7D      
2012 08  17.46062  22 20 46.414  -19 30 51.66  21.5G 04PY117   F51  C~2r7D      
2012 08  17.47488  22 20 46.334  -19 30 52.34  21.9G 04PY117   F51  C~2r7D      
2012 08  17.48915  22 20 46.236  -19 30 52.81  21.8G 04PY117   F51  C~2r7D      
2013 08  09.44376  22 31 24.849  -19 24 46.06  20.9G 04PY117   F51  C~2r7D      
2013 08  09.45801  22 31 24.780  -19 24 46.97  21.4G 04PY117   F51  C~2r7D      
2013 08  09.47225  22 31 24.696  -19 24 47.54  21.3G 04PY117   F51  C~2r7D      
2013 08  09.48649  22 31 24.612  -19 24 48.27  21.1G 04PY117   F51  C~2r7D      
2014 06  28.56154  22 43 46.663  -18 52 00.07        04PY117   F51  C~2r7D      
2014 06  28.57342  22 43 46.627  -18 52 00.46        04PY117   F51  C~2r7D      
2014 06  28.58529  22 43 46.625  -18 52 00.97        04PY117   F51  C~2r7D      
2014 06  28.59718  22 43 46.589  -18 52 01.50        04PY117   F51  C~2r7D      
2014 07  06.51923  22 43 28.767  -18 57 12.06        04PY117   F51  C~2r7D      
2014 07  06.53180  22 43 28.732  -18 57 12.14        04PY117   F51  C~2r7D      
2014 07  06.54441  22 43 28.683  -18 57 12.63        04PY117   F51  C~2r7D      
2014 07  06.55698  22 43 28.660  -18 57 13.27        04PY117   F51  C~2r7D      
2014 07  08.57209  22 43 23.056  -18 58 36.37  22.6G 04PY117   F51  C~2r7D      
2014 07  27.54551  22 42 11.273  -19 12 40.35  22.4G 04PY117   F51  C~2r7D      
2014 07  29.52427  22 42 02.045  -19 14 12.52  21.9G 04PY117   F51  C~2r7D      
2014 07  30.53557  22 41 57.212  -19 14 59.73  23.2G 04PY117   F51  C~2r7D      
2014 08  28.36781  22 39 17.620  -19 36 58.73  21.3G 04PY117   F51  C~2r7D      
2014 08  28.37835  22 39 17.559  -19 36 59.19  20.8G 04PY117   F51  C~2r7D      
2014 09  11.38630  22 37 54.319  -19 46 16.67  21.5G 04PY117   F51  C~2r7D      
2014 09  18.38454  22 37 14.143  -19 50 18.86        04PY117   F51  C~2r7E      
2014 09  18.39573  22 37 14.087  -19 50 19.05  21.9G 04PY117   F51  C~2r7E      
2014 09  18.40693  22 37 14.031  -19 50 19.39  21.6G 04PY117   F51  C~2r7E      
2014 09  18.41811  22 37 13.964  -19 50 19.75  22.2G 04PY117   F51  C~2r7E      
2014 09  19.05793  22 37 10.39   -19 50 40.2   22.4V 04PY117   W84  C~2J8r      
2014 09  19.12685  22 37 10.00   -19 50 42.4         04PY117   W84  C~2J8r      
2014 09  19.23350  22 37 09.39   -19 50 45.9         04PY117   W84  C~2J8r      
2014 09  20.34262  22 37 03.239  -19 51 21.16  22.0G 04PY117   F51  C~2r7E      
2014 09  20.35652  22 37 03.162  -19 51 21.73  21.7G 04PY117   F51  C~2r7E      
2014 09  20.36770  22 37 03.094  -19 51 22.02  21.9G 04PY117   F51  C~2r7E      
2015 06  17.56924  22 53 16.363  -18 41 45.65  20.7G 04PY117   F51  C~2r7E      
2015 06  20.57053  22 53 15.217  -18 43 20.38  22.4G 04PY117   F51  C~2r7E      
2015 07  24.48295  22 51 53.161  -19 06 18.28  21.6G 04PY117   F51  C~2r7E      
2015 07  24.49496  22 51 53.106  -19 06 18.92  22.4G 04PY117   F51  C~2r7E      
2015 07  24.50693  22 51 53.067  -19 06 19.67  22.6G 04PY117   F51  C~2r7E      
2015 07  24.51886  22 51 53.014  -19 06 20.01  22.0G 04PY117   F51  C~2r7E      
2015 08  09.49572  22 50 38.072  -19 18 53.55  22.2G 04PY117   F51  C~2r7E      
2015 08  10.48139  22 50 32.872  -19 19 40.31  22.4w 04PY117   F51  C~1VZw      
2015 08  10.49329  22 50 32.820  -19 19 40.50  22.2w 04PY117   F51  C~1VZw      
2015 08  10.50512  22 50 32.746  -19 19 41.70  22.3w 04PY117   F51  C~1VZw      
2015 08  11.47332  22 50 27.631  -19 20 27.19  22.1G 04PY117   F51  C~2r7E      
2015 08  11.48524  22 50 27.559  -19 20 27.81  21.6G 04PY117   F51  C~2r7E      
2015 08  11.49716  22 50 27.504  -19 20 28.27  22.1G 04PY117   F51  C~2r7E      
2015 08  11.50903  22 50 27.430  -19 20 28.88  22.0G 04PY117   F51  C~2r7E      
2015 08  12.46687  22 50 22.313  -19 21 14.01  21.8G 04PY117   F51  C~2r7E      
2015 08  12.47877  22 50 22.256  -19 21 14.67  21.9G 04PY117   F51  C~2r7E      
2015 08  12.49068  22 50 22.183  -19 21 15.30  22.0G 04PY117   F51  C~2r7E      
2015 08  12.50261  22 50 22.114  -19 21 15.81  21.5G 04PY117   F51  C~2r7E      
2015 10  03.34279  22 45 29.023  -19 54 11.55  21.9G 04PY117   F51  C~2r7E      
2016 07  05.52995  23 02 04.710  -18 47 25.20  23.3G 04PY117   F51  C~2r7E      
2016 07  05.54025  23 02 04.682  -18 47 25.83  22.8G 04PY117   F51  C~2r7E      
2016 07  05.55053  23 02 04.675  -18 47 26.19  22.4G 04PY117   F51  C~2r7E      
2016 07  05.56082  23 02 04.642  -18 47 26.43  22.3G 04PY117   F51  C~2r7E      
2016 07  17.55779  23 01 32.468  -18 56 02.19  22.6G 04PY117   F51  C~2r7E      
2016 07  30.54293  23 00 42.337  -19 06 06.02  22.5G 04PY117   F51  C~2r7E      
2016 07  30.55453  23 00 42.282  -19 06 06.64  22.4G 04PY117   F51  C~2r7E      
2016 07  30.56611  23 00 42.242  -19 06 07.50  21.7G 04PY117   F51  C~2r7E      
2016 07  30.57767  23 00 42.212  -19 06 07.68  22.0G 04PY117   F51  C~2r7E      
2016 08  02.47592  23 00 29.118  -19 08 26.20  21.9G 04PY117   F51  C~2r7E      
2016 08  02.48780  23 00 29.067  -19 08 26.84  22.5G 04PY117   F51  C~2r7E      
2016 08  02.49965  23 00 29.007  -19 08 27.30  21.8G 04PY117   F51  C~2r7E      
2016 08  02.51152  23 00 28.952  -19 08 27.89  22.0G 04PY117   F51  C~2r7E      
2016 08  07.52714  23 00 04.871  -19 12 28.67  21.5G 04PY117   F51  C~2r7E      
2016 08  07.53752  23 00 04.864  -19 12 28.79  21.9G 04PY117   F51  C~2r7E      
2016 08  07.54786  23 00 04.788  -19 12 29.09  22.3G 04PY117   F51  C~2r7E      
2016 08  07.55823  23 00 04.730  -19 12 30.03  22.8G 04PY117   F51  C~2r7E      
2016 08  27.41420  22 58 16.698  -19 27 56.95  23.2G 04PY117   F51  C~2r7E      
2016 08  27.43875  22 58 16.560  -19 27 58.18  22.2G 04PY117   F51  C~2r7E      
2016 08  27.45101  22 58 16.481  -19 27 58.57  22.1G 04PY117   F51  C~2r7E      
2017 09  13.43328  23 05 53.318  -19 32 42.29  22.3G 04PY117   F51  C~2r7E      
2017 09  21.41185  23 05 07.601  -19 37 26.85  22.7G 04PY117   F51  C~2r7E      
2017 09  21.42286  23 05 07.537  -19 37 26.97  22.8G 04PY117   F51  C~2r7E      
2017 09  21.43377  23 05 07.494  -19 37 27.32  22.3G 04PY117   F51  C~2r7E      
2017 09  21.44471  23 05 07.419  -19 37 27.51  22.5G 04PY117   F51  C~2r7E      

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     0.11       0.00     0.16
  2   0.0001      0.00    -0.01       0.00     0.10
  3   0.0002      0.00     0.09       0.00     0.06
  4   0.0027      0.00     0.10       0.00    -0.06
  5   0.1366      0.00    -0.05       0.00     0.19
  6   0.1368      0.00     0.13       0.00     0.09
  7   0.1369      0.00    -0.14       0.00    -0.02
  8   0.9060      0.00    -0.13       0.00     0.09
  9   0.9061      0.00     0.07       0.00     0.02
 10   0.9062      0.00    -0.01       0.00     0.05
 11   0.9086      0.00    -0.02       0.00    -0.05
 12   0.9660      0.00    -0.09       0.00     0.05
 13   0.9663      0.00     0.05       0.00     0.03
 14   0.9664      0.00     0.03       0.00     0.11
 15   1.7115      0.00     0.17       0.00    -0.07
 16   1.7170      0.00    -0.26       0.00    -0.20
 17   4.8461      0.00     0.12       0.00    -0.10
 18   4.8462      0.00     0.14       0.00    -0.01
 19   4.8516      0.00    -0.27       0.00    -0.77
 20   6.9463      0.00    -0.11       0.00     0.15
 21   6.9463      0.00     0.14       0.00     0.08
 22   6.9463      0.00     0.06       0.00    -0.07
 23   6.9464      0.00     0.07       0.00    -0.14
 24   7.0392      0.00     0.01       0.00    -0.13
 25   7.0393      0.00    -0.00       0.00     0.15
 26   8.0057      0.00    -0.05       0.00    -0.05
 27   8.0058      0.00     0.03       0.00    -0.06
 28   8.0058      0.00     0.14       0.00    -0.12
 29   8.0058      0.00    -0.02       0.00     0.04
 30   8.9831      0.00    -0.18       0.00     0.20
 31   8.9832      0.00     0.01       0.00    -0.06
 32   8.9832      0.00    -0.03       0.00     0.03
 33   8.9833      0.00    -0.07       0.00    -0.04
 34   9.8678      0.00     0.12       0.00     0.02
 35   9.8678      0.00    -0.08       0.00     0.08
 36   9.8678      0.00     0.23       0.00     0.01
 37   9.8679      0.00     0.04       0.00    -0.07
 38   9.8896      0.00     0.02       0.00    -0.30
 39   9.8896      0.00     0.02       0.00     0.14
 40   9.8896      0.00    -0.19       0.00     0.17
 41   9.8897      0.00    -0.01       0.00     0.04
 42   9.8952      0.00     0.14       0.00     0.15
 43   9.9471      0.00     0.01       0.00     0.05
 44   9.9526      0.00     0.12       0.00     0.04
 45   9.9553      0.00     0.10       0.00     0.07
 46  10.0343      0.00    -0.08       0.00     0.08
 47  10.0343      0.00    -0.04       0.00     0.07
 48  10.0726      0.00     0.03       0.00     0.11
 49  10.0918      0.00    -0.15       0.00    -0.20
 50  10.0918      0.00    -0.03       0.00    -0.02
 51  10.0919      0.00     0.09       0.00     0.00
 52  10.0919      0.00     0.05       0.00     0.00
 53  10.0936      0.00    -0.00       0.00    -0.02
 54  10.0938      0.00     0.03       0.00     0.01
 55  10.0941      0.00    -0.02       0.00    -0.09
 56  10.0972      0.00    -0.05       0.00     0.03
 57  10.0972      0.00    -0.02       0.00    -0.10
 58  10.0972      0.00    -0.10       0.00    -0.04
 59  10.8370      0.00     0.05       0.00    -0.48
 60  10.8452      0.00    -0.08       0.00    -0.01
 61  10.9381      0.00    -0.01       0.00     0.14
 62  10.9381      0.00    -0.08       0.00     0.06
 63  10.9381      0.00     0.09       0.00    -0.13
 64  10.9382      0.00     0.05       0.00     0.08
 65  10.9819      0.00     0.36       0.00     0.08
 66  10.9846      0.00    -0.13       0.00    -0.01
 67  10.9846      0.00     0.06       0.00     0.37
 68  10.9847      0.00    -0.10       0.00    -0.27
 69  10.9873      0.00     0.07       0.00     0.02
 70  10.9874      0.00    -0.04       0.00    -0.04
 71  10.9874      0.00     0.11       0.00     0.07
 72  10.9874      0.00    -0.03       0.00     0.02
 73  10.9900      0.00     0.01       0.00     0.10
 74  10.9901      0.00     0.14       0.00    -0.00
 75  10.9901      0.00     0.02       0.00    -0.07
 76  10.9901      0.00    -0.03       0.00    -0.02
 77  11.1321      0.00    -0.28       0.00    -0.08
 78  11.8882      0.00     0.02       0.00     0.07
 79  11.8883      0.00    -0.07       0.00    -0.14
 80  11.8883      0.00     0.16       0.00    -0.08
 81  11.8883      0.00    -0.00       0.00     0.10
 82  11.9212      0.00    -0.05       0.00     0.01
 83  11.9567      0.00    -0.16       0.00     0.21
 84  11.9567      0.00    -0.20       0.00     0.14
 85  11.9568      0.00    -0.01       0.00    -0.17
 86  11.9568      0.00     0.32       0.00     0.20
 87  11.9647      0.00     0.01       0.00     0.06
 88  11.9648      0.00     0.09       0.00    -0.01
 89  11.9648      0.00     0.03       0.00     0.10
 90  11.9648      0.00     0.05       0.00     0.08
 91  11.9786      0.00    -0.35       0.00    -0.33
 92  11.9786      0.00     0.34       0.00     0.05
 93  11.9786      0.00    -0.02       0.00     0.24
 94  11.9787      0.00    -0.10       0.00    -0.20
 95  12.0330      0.00    -0.04       0.00     0.02
 96  12.0331      0.00     0.07       0.00    -0.12
 97  12.0331      0.00    -0.03       0.00     0.04
 98  13.0789      0.00    -0.07       0.00    -0.13
 99  13.1008      0.00    -0.06       0.00    -0.13
100  13.1008      0.00    -0.07       0.00     0.11
101  13.1008      0.00     0.22       0.00     0.12
102  13.1009      0.00     0.04       0.00     0.29

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.

04PY117    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        39.636    39.636    39.636
ecceobj         0.274     0.274     0.274
incobj         23.561    23.561    23.561
qmin           28.442    28.441    25.207
qmax           52.119    52.120    56.053
amean          40.017    40.017    40.411
amin           39.636    39.636    38.722
amax           40.451    40.451    41.645
emean           0.282     0.282     0.348
emin            0.274     0.274     0.264
emax            0.288     0.288     0.374
imean          21.937    21.937    18.035
imin           21.857    21.857    16.588
imax           22.109    22.109    22.109
excite_mean     0.468     0.468     0.467
fracstop        0.001     0.001     0.094
cjmean          2.809     2.809     2.812

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       152.9     152.9     173.8
kozaiamp          0.8       0.8      39.7