Orbit Fit and Astrometric record for 12GU11

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: 12GU11    
# Created Thu Feb 21 02:09:20 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting  101 observations of  101
# Arc:   7.71y
# First observation: 2010/06/30
#  Last observation: 2018/03/17
# Chi-squared of fit:    70.43 DOF:  196 RMS:  0.15
# Min/Max residuals:    -0.39    0.54
# Exact a, adot, b, bdot, g, gdot:
  2.983449E-05  1.018580E-01  4.245081E-06  1.746471E-02  5.227911E-02  1.323129E-02
# Covariance matrix:
  1.5180E-13 -6.4592E-14  1.3621E-14 -8.6250E-15 -3.2277E-14 -6.9556E-14
 -6.4592E-14  4.2359E-14 -8.6306E-15  6.6598E-15  5.2145E-15  5.0159E-14
  1.3621E-14 -8.6306E-15  7.3827E-14 -1.6034E-14 -5.1973E-15 -1.1927E-14
 -8.6250E-15  6.6598E-15 -1.6034E-14  4.7796E-15  9.2650E-16  8.6318E-15
 -3.2277E-14  5.2145E-15 -5.1973E-15  9.2650E-16  4.2477E-14  1.4497E-14
 -6.9556E-14  5.0159E-14 -1.1927E-14  8.6318E-15  1.4497E-14  6.6404E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
    4.914524  169.257407   -0.960285   -0.028007    0.325033  2455377.772296
# Heliocentric elements and errors
Epoch:              2455378.5000  =  2010/07/01
Mean Anomaly:            0.56188 +/-     0.000
Argument of Peri:        6.13520 +/-     0.000
Long of Asc Node:      144.83582 +/-     0.000
Inclination:            10.76629 +/-     0.000
Eccentricity:         0.89321164 +/-    0.0000
Semi-Major Axis:    170.40363240 +/-    0.0359
Time of Perihelion: 2454110.3884 +/-       0.6
Perihelion:          18.19712456 +/-    0.0054
Aphelion:           322.61014024 +/-    0.0681
Period (y)             2224.4696 +/-      0.70
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -18.57822576 +/-    0.0001
Ecliptic Y            2.54561610 +/-    0.0000
Ecliptic Z            1.63882076 +/-    0.0000
Ecliptic XDOT        -0.00159431 +/-    0.0000
Ecliptic YDOT        -0.00512061 +/-    0.0000
Ecliptic ZDOT         0.00097059 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   18.82318729 +/-    0.0001
Geocenter to KBO     19.12806549 +/-    0.0001
# Hcoef:  8.95

The following table shows the complete astrometric record for 12GU11. 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 (12GU11) followed by the observatory code and reference code for the source of the astrometry.

2010 06  30.27153  11 28 17.365  +08 46 12.78  22.2G 12GU11    F51  C~2r7M      
2010 06  30.27767  11 28 17.416  +08 46 12.50  22.0G 12GU11    F51  C~2r7M      
2010 07  01.27224  11 28 24.529  +08 45 21.33  22.7G 12GU11    F51  C~2r7M      
2010 07  01.27992  11 28 24.566  +08 45 21.04  22.1G 12GU11    F51  C~2r7M      
2011 03  11.53872  11 56 57.590  +06 50 14.81  21.8G 12GU11    F51  C~2r7M      
2011 03  13.42141  11 56 42.349  +06 52 17.87  21.8G 12GU11    F51  C~2r7M      
2011 03  13.43391  11 56 42.252  +06 52 18.67  22.0G 12GU11    F51  C~2r7M      
2011 04  02.30687  11 54 00.987  +07 12 32.84  21.5w 12GU11    F51  C~1vWd      
2011 04  02.32200  11 54 00.869  +07 12 33.79  21.7w 12GU11    F51  C~1vWd      
2011 04  02.33816  11 54 00.745  +07 12 34.75  21.8w 12GU11    F51  C~1vWd      
2011 04  02.35325  11 54 00.623  +07 12 35.51  21.9w 12GU11    F51  C~1vWd      
2011 06  19.27888  11 50 13.578  +07 29 36.23  22.3w 12GU11    F51  C~1vWd      
2011 06  19.28415  11 50 13.613  +07 29 35.98  22.3w 12GU11    F51  C~1vWd      
2011 06  19.28941  11 50 13.613  +07 29 35.52  22.2w 12GU11    F51  C~1vWd      
2011 06  19.29467  11 50 13.615  +07 29 35.75  22.0w 12GU11    F51  C~1vWd      
2012 02  28.50996  12 21 29.365  +05 06 49.24  21.7G 12GU11    F51  C~2r7M      
2012 04  12.33792  12 15 50.689  +05 50 51.54  21.8w 12GU11    F51  C@0613      
2012 04  12.35186  12 15 50.578  +05 50 52.23  21.6w 12GU11    F51  C@0613      
2012 04  12.37982  12 15 50.369  +05 50 53.67  21.8w 12GU11    F51  C@0613      
2012 04  16.29855  12 15 21.81   +05 53 57.8   21.4R 12GU11    291  C~0frf      
2012 04  16.30993  12 15 21.71   +05 53 58.8   21.0R 12GU11    291  C~0frf      
2012 04  16.32130  12 15 21.63   +05 53 59.6   21.2R 12GU11    291  C~0frf      
2013 03  19.48691  12 40 53.611  +03 58 19.55  22.0w 12GU11    F51  C~1vWd      
2013 03  19.50225  12 40 53.492  +03 58 20.45  21.9w 12GU11    F51  C~1vWd      
2013 03  19.51769  12 40 53.366  +03 58 21.37  21.9w 12GU11    F51  C~1vWd      
2013 03  19.53311  12 40 53.241  +03 58 22.56  22.0w 12GU11    F51  C~1vWd      
2013 04  17.32135  12 37 09.295  +04 25 09.94  22.2G 12GU11    F51  C~2r7M      
2013 12  05.62534  13 01 20.263  +01 43 57.53  21.6G 12GU11    F51  C~2r7M      
2013 12  05.62929  13 01 20.287  +01 43 57.53  21.4G 12GU11    F51  C~2r7M      
2013 12  05.63322  13 01 20.310  +01 43 57.35  21.6G 12GU11    F51  C~2r7M      
2013 12  05.63718  13 01 20.347  +01 43 57.19  21.7G 12GU11    F51  C~2r7M      
2014 02  10.49820  13 04 45.674  +01 57 13.91  21.5i 12GU11    F51  C~1w3q      
2014 03  09.48783  13 02 35.360  +02 21 47.64  21.4i 12GU11    F51  C~1w3q      
2014 03  09.56102  13 02 34.849  +02 21 52.16  21.8i 12GU11    F51  C~1w3q      
2014 03  09.57498  13 02 34.781  +02 21 52.98  21.8i 12GU11    F51  C~1w3q      
2014 03  24.44622  13 00 49.861  +02 36 44.28  21.9w 12GU11    F51  C~1vWd      
2014 03  24.45973  13 00 49.764  +02 36 44.87  22.0w 12GU11    F51  C~1vWd      
2014 03  24.47324  13 00 49.650  +02 36 45.77  22.3w 12GU11    F51  C~1vWd      
2014 03  24.48684  13 00 49.563  +02 36 46.38  22.1w 12GU11    F51  C~1vWd      
2014 04  04.35227  12 59 26.022  +02 47 13.35  21.8w 12GU11    F51  C~1vWd      
2014 04  04.36614  12 59 25.916  +02 47 14.32  22.0w 12GU11    F51  C~1vWd      
2014 04  04.38009  12 59 25.788  +02 47 15.08  21.9w 12GU11    F51  C~1vWd      
2014 04  04.39402  12 59 25.677  +02 47 15.69  22.1w 12GU11    F51  C~1vWd      
2014 04  23.30324  12 57 01.769  +03 02 58.74  22.1w 12GU11    F51  C~1vWd      
2014 04  23.31534  12 57 01.673  +03 02 59.41  21.9w 12GU11    F51  C~1vWd      
2014 04  23.33967  12 57 01.475  +03 03 00.40  22.3w 12GU11    F51  C~1vWd      
2014 04  29.26022  12 56 19.840  +03 06 59.56  22.1w 12GU11    F51  C~1vWd      
2014 04  29.27212  12 56 19.755  +03 07 00.12  22.2w 12GU11    F51  C~1vWd      
2014 04  29.28400  12 56 19.682  +03 07 00.48  22.2w 12GU11    F51  C~1vWd      
2014 04  29.29589  12 56 19.594  +03 07 00.74  21.9w 12GU11    F51  C~1vWd      
2014 05  27.29190  12 53 50.198  +03 17 46.62  22.0w 12GU11    F51  C~1vWd      
2014 05  27.30439  12 53 50.145  +03 17 46.74  22.2w 12GU11    F51  C~1vWd      
2014 05  27.31688  12 53 50.109  +03 17 46.89  22.1w 12GU11    F51  C~1vWd      
2014 05  27.32937  12 53 50.057  +03 17 46.90  22.0w 12GU11    F51  C~1vWd      
2015 03  25.45024  13 19 56.626  +01 15 26.65  22.2w 12GU11    F51  C~1vWd      
2015 03  25.46513  13 19 56.514  +01 15 27.29  22.2w 12GU11    F51  C~1vWd      
2015 03  25.48013  13 19 56.398  +01 15 28.27  22.3w 12GU11    F51  C~1vWd      
2015 04  15.47921  13 17 18.393  +01 34 19.38  22.0G 12GU11    F51  C~2r7M      
2015 04  15.49435  13 17 18.274  +01 34 20.45  22.0G 12GU11    F51  C~2r7M      
2015 04  16.34609  13 17 11.825  +01 35 02.18  22.0w 12GU11    F51  C~1vWd      
2015 04  16.37508  13 17 11.609  +01 35 03.32  21.8w 12GU11    F51  C~1vWd      
2015 04  16.38958  13 17 11.486  +01 35 04.08  22.0w 12GU11    F51  C~1vWd      
2015 05  20.38956  13 13 25.063  +01 54 51.87  22.4w 12GU11    F51  C~1vWd      
2015 05  20.40114  13 13 25.003  +01 54 51.75  22.4w 12GU11    F51  C~1vWd      
2015 05  20.42431  13 13 24.871  +01 54 52.61  22.3w 12GU11    F51  C~1vWd      
2015 06  07.26789  13 12 13.735  +01 57 29.07  22.3G 12GU11    F51  C~2r7M      
2015 06  08.26609  13 12 11.079  +01 57 27.45  22.3w 12GU11    F51  C~1vWd      
2015 06  08.27784  13 12 11.037  +01 57 27.60  22.5w 12GU11    F51  C~1vWd      
2015 06  08.28955  13 12 11.001  +01 57 27.27  22.4w 12GU11    F51  C~1vWd      
2015 06  08.30129  13 12 10.980  +01 57 27.34  22.5w 12GU11    F51  C~1vWd      
2016 01  15.60771  13 40 36.769  -00 48 13.65  22.5G 12GU11    F51  C~2r7M      
2016 01  15.62066  13 40 36.800  -00 48 13.74  22.6G 12GU11    F51  C~2r7M      
2016 01  15.63362  13 40 36.861  -00 48 13.43  21.9G 12GU11    F51  C~2r7M      
2016 01  15.64661  13 40 36.911  -00 48 13.03  22.4G 12GU11    F51  C~2r7M      
2016 02  15.60000  13 40 51.885  -00 33 35.23  22.3G 12GU11    F51  C~2r7M      
2016 03  11.55105  13 39 12.704  -00 13 25.10  22.6G 12GU11    F51  C~2r7M      
2016 04  01.41763  13 36 56.923  +00 05 25.05  22.3G 12GU11    F51  C~2r7M      
2016 04  01.43103  13 36 56.825  +00 05 25.76  22.6G 12GU11    F51  C~2r7M      
2016 04  01.44448  13 36 56.733  +00 05 26.42  22.5G 12GU11    F51  C~2r7M      
2016 04  01.45796  13 36 56.631  +00 05 27.04  22.6G 12GU11    F51  C~2r7M      
2016 04  09.40236  13 35 58.176  +00 12 21.30  22.4G 12GU11    F51  C~2r7M      
2016 04  09.41430  13 35 58.081  +00 12 22.00  22.4G 12GU11    F51  C~2r7M      
2016 04  09.42623  13 35 57.983  +00 12 22.45  22.2G 12GU11    F51  C~2r7M      
2016 04  09.49512  13 35 57.465  +00 12 26.13  22.4G 12GU11    F51  C~2r7M      
2016 04  09.50866  13 35 57.356  +00 12 26.82  22.1G 12GU11    F51  C~2r7M      
2016 04  09.52187  13 35 57.239  +00 12 27.45  21.7G 12GU11    F51  C~2r7M      
2016 04  28.35777  13 33 37.231  +00 26 49.57  21.9G 12GU11    F51  C~2r7M      
2016 04  28.36895  13 33 37.130  +00 26 49.97  22.1G 12GU11    F51  C~2r7M      
2016 04  28.39131  13 33 36.976  +00 26 50.83  22.2G 12GU11    F51  C~2r7M      
2016 05  05.36136  13 32 47.937  +00 31 08.64  22.8G 12GU11    F51  C~2r7M      
2016 05  05.38445  13 32 47.789  +00 31 09.64  21.8G 12GU11    F51  C~2r7M      
2016 05  05.39607  13 32 47.695  +00 31 10.02  22.1G 12GU11    F51  C~2r7M      
2017 03  07.55946  13 56 06.575  -01 27 45.74  23.6G 12GU11    F51  C~2r7M      
2017 03  07.57272  13 56 06.513  -01 27 44.93  22.8G 12GU11    F51  C~2r7M      
2017 03  07.58595  13 56 06.444  -01 27 44.45  23.1G 12GU11    F51  C~2r7M      
2017 03  07.59917  13 56 06.379  -01 27 43.76  22.8G 12GU11    F51  C~2r7M      
2017 04  03.60201  13 53 26.502  -01 04 50.14  20.1G 12GU11    F51  C~2r7M      
2017 05  17.27439  13 48 17.712  -00 35 29.52  22.3G 12GU11    F51  C~2r7M      
2017 05  22.29170  13 47 47.756  -00 33 35.79  22.5G 12GU11    F51  C~2r7M      
2018 03  17.56680  14 10 43.407  -02 25 18.15  22.6G 12GU11    F51  C~2r7M      
2018 03  17.57925  14 10 43.337  -02 25 17.01  22.9G 12GU11    F51  C~2r7M      

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     0.27       0.00     0.12
  2   0.0000      0.00     0.40       0.00     0.15
  3   0.0027      0.00     0.10       0.00    -0.22
  4   0.0028      0.00    -0.17       0.00    -0.11
  5   0.6961      0.00     0.08       0.00    -0.08
  6   0.7013      0.00    -0.08       0.00    -0.03
  7   0.7013      0.00     0.02       0.00    -0.04
  8   0.7557      0.00    -0.19       0.00    -0.04
  9   0.7558      0.00    -0.14       0.00     0.06
 10   0.7558      0.00    -0.06       0.00     0.13
 11   0.7559      0.00    -0.07       0.00     0.05
 12   0.9692      0.00    -0.00       0.00    -0.05
 13   0.9692      0.00     0.24       0.00    -0.12
 14   0.9692      0.00    -0.04       0.00    -0.39
 15   0.9693      0.00    -0.29       0.00     0.02
 16   1.6653      0.00     0.03       0.00    -0.02
 17   1.7853      0.00     0.07       0.00     0.05
 18   1.7853      0.00    -0.00       0.00     0.06
 19   1.7854      0.00     0.05       0.00     0.14
 20   1.7961      0.00    -0.03       0.00    -0.33
 21   1.7961      0.00    -0.29       0.00     0.16
 22   1.7962      0.00    -0.24       0.00     0.44
 23   2.7193      0.00     0.10       0.00     0.10
 24   2.7193      0.00     0.13       0.00     0.05
 25   2.7194      0.00     0.05       0.00     0.02
 26   2.7194      0.00    -0.01       0.00     0.25
 27   2.7982      0.00     0.01       0.00     0.38
 28   3.4342      0.00     0.19       0.00    -0.03
 29   3.4342      0.00     0.04       0.00     0.08
 30   3.4343      0.00    -0.13       0.00     0.00
 31   3.4343      0.00    -0.09       0.00    -0.05
 32   3.6173      0.00    -0.11       0.00    -0.30
 33   3.6912      0.00     0.15       0.00    -0.05
 34   3.6914      0.00    -0.22       0.00     0.10
 35   3.6915      0.00     0.15       0.00     0.09
 36   3.7322      0.00    -0.10       0.00     0.10
 37   3.7322      0.00     0.00       0.00    -0.11
 38   3.7322      0.00    -0.15       0.00    -0.01
 39   3.7323      0.00     0.12       0.00    -0.21
 40   3.7620      0.00     0.04       0.00    -0.11
 41   3.7621      0.00     0.10       0.00     0.08
 42   3.7621      0.00    -0.16       0.00     0.07
 43   3.7621      0.00    -0.16       0.00    -0.10
 44   3.8139      0.00     0.18       0.00    -0.10
 45   3.8139      0.00     0.08       0.00     0.05
 46   3.8140      0.00    -0.19       0.00    -0.00
 47   3.8302      0.00     0.11       0.00    -0.06
 48   3.8303      0.00     0.07       0.00     0.05
 49   3.8303      0.00     0.22       0.00    -0.04
 50   3.8303      0.00     0.14       0.00    -0.23
 51   3.9070      0.00    -0.05       0.00    -0.07
 52   3.9070      0.00    -0.15       0.00    -0.04
 53   3.9070      0.00     0.01       0.00     0.02
 54   3.9071      0.00    -0.08       0.00    -0.06
 55   4.7342      0.00     0.32       0.00     0.16
 56   4.7343      0.00     0.29       0.00    -0.05
 57   4.7343      0.00     0.20       0.00     0.07
 58   4.7918      0.00    -0.07       0.00    -0.24
 59   4.7918      0.00    -0.09       0.00     0.09
 60   4.7942      0.00     0.05       0.00     0.18
 61   4.7943      0.00     0.19       0.00    -0.09
 62   4.7943      0.00     0.03       0.00    -0.04
 63   4.8874      0.00     0.02       0.00     0.19
 64   4.8874      0.00     0.04       0.00    -0.15
 65   4.8875      0.00    -0.10       0.00     0.28
 66   4.9363      0.00    -0.03       0.00     0.01
 67   4.9391      0.00     0.05       0.00     0.16
 68   4.9391      0.00    -0.10       0.00     0.34
 69   4.9391      0.00    -0.15       0.00     0.04
 70   4.9392      0.00     0.02       0.00     0.14
 71   5.5451      0.00    -0.17       0.00    -0.11
 72   5.5451      0.00    -0.30       0.00    -0.37
 73   5.5451      0.00     0.02       0.00    -0.23
 74   5.5452      0.00     0.18       0.00    -0.00
 75   5.6299      0.00     0.04       0.00     0.14
 76   5.6982      0.00    -0.15       0.00     0.06
 77   5.7554      0.00    -0.12       0.00     0.05
 78   5.7554      0.00    -0.11       0.00     0.05
 79   5.7554      0.00    -0.00       0.00    -0.01
 80   5.7555      0.00    -0.04       0.00    -0.11
 81   5.7772      0.00     0.06       0.00    -0.20
 82   5.7773      0.00    -0.00       0.00    -0.11
 83   5.7773      0.00    -0.11       0.00    -0.27
 84   5.7775      0.00     0.01       0.00    -0.08
 85   5.7775      0.00    -0.08       0.00    -0.08
 86   5.7776      0.00    -0.32       0.00    -0.12
 87   5.8291      0.00     0.20       0.00     0.13
 88   5.8292      0.00    -0.08       0.00     0.08
 89   5.8292      0.00     0.08       0.00     0.05
 90   5.8483      0.00     0.02       0.00    -0.22
 91   5.8484      0.00     0.22       0.00    -0.01
 92   5.8484      0.00     0.03       0.00    -0.03
 93   6.6866      0.00     0.07       0.00    -0.02
 94   6.6867      0.00     0.07       0.00     0.14
 95   6.6867      0.00    -0.03       0.00    -0.02
 96   6.6867      0.00    -0.08       0.00     0.02
 97   6.7607      0.00     0.08       0.00    -0.08
 98   6.8802      0.00    -0.14       0.00     0.07
 99   6.8940      0.00    -0.15       0.00    -0.06
100   7.7133      0.00     0.01       0.00    -0.01
101   7.7134      0.00    -0.05       0.00     0.54

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.

12GU11    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj       177.460   177.450   177.470
ecceobj         0.897     0.897     0.897
incobj         10.761    10.761    10.761
qmin           17.099    17.409    17.413
qmax          434.902   336.674   336.713
amean         187.364   172.987   174.981
amin          157.885   168.349   172.652
amax          226.773   177.450   177.470
emean           0.901     0.895     0.896
emin            0.881     0.888     0.890
emax            0.923     0.900     0.900
imean           9.592     9.549     9.544
imin            9.119     9.293     9.292
imax           10.034     9.738     9.736
excite_mean     0.917     0.910     0.911
fracstop        0.136     0.003     0.002
cjmean          2.284     2.290     2.288

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        21.0       6.5       6.4
kozaiamp         14.3       0.5       0.4