Orbit Fit and Astrometric record for 11QF99

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: 11QF99    
# Created Wed Dec  8 02:11:15 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     91 observations of     91
# Arc:  10.12y
# First observation: 2008/11/02
#  Last observation: 2018/12/18
# Chi-squared of fit:    85.74 DOF:    176 RMS:  0.17
# Min/Max residuals:    -0.47    0.66
# Exact a, adot, b, bdot, g, gdot:
  2.087630E-05  6.368283E-02 -2.201770E-06 -1.110673E-02  5.008641E-02 -1.101722E-02
# Covariance matrix:
  2.4978E-13 -7.9501E-14 -3.0416E-14  1.2094E-14 -2.3195E-14 -7.2213E-14
 -7.9501E-14  2.9380E-14  1.2281E-14 -4.8933E-15  6.7941E-15  2.9266E-14
 -3.0416E-14  1.2281E-14  8.4176E-14 -1.3306E-14  2.4929E-15  1.3103E-14
  1.2094E-14 -4.8933E-15 -1.3306E-14  2.7317E-15 -8.5898E-16 -5.2313E-15
 -2.3195E-14  6.7941E-15  2.4929E-15 -8.5898E-16  3.5700E-14  4.5027E-15
 -7.2213E-14  2.9266E-14  1.3103E-14 -5.2313E-15  4.5027E-15  3.1338E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
    4.389200   18.908161   -0.364885    0.070789   -0.921748  2454772.856102
# Heliocentric elements and errors
Epoch:              2454772.5000  =  2008/11/02
Mean Anomaly:          246.34179 +/-     0.004
Argument of Peri:      287.37359 +/-     0.003
Long of Asc Node:      222.47028 +/-     0.000
Inclination:            10.81674 +/-     0.000
Eccentricity:         0.17510312 +/-    0.0000
Semi-Major Axis:     19.11006266 +/-    0.0002
Time of Perihelion: 2464406.1283 +/-       0.5
Perihelion:          15.76383109 +/-    0.0002
Aphelion:            22.45629423 +/-    0.0003
Period (y)               83.5413 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           19.59072760 +/-    0.0001
Ecliptic Y            7.09137545 +/-    0.0000
Ecliptic Z            1.52793351 +/-    0.0000
Ecliptic XDOT        -0.00164624 +/-    0.0000
Ecliptic YDOT         0.00311615 +/-    0.0000
Ecliptic ZDOT        -0.00065155 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   20.89070005 +/-    0.0001
Geocenter to KBO     19.96559545 +/-    0.0001
# Hcoef:  9.77

The following table shows the complete astrometric record for 11QF99. 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 (11QF99) followed by the observatory code and reference code for the source of the astrometry.

2008 11  02.355348 01 02 59.59   +11 27 47.5   22.5V 11QF99    645  C~1SLn      
2008 11  02.356177 01 02 59.59   +11 27 47.4   22.2V 11QF99    645  C~1SLn      
2008 11  02.358665 01 02 59.57   +11 27 47.3   23.6V 11QF99    645  C~1SLn      
2010 11  01.29522  01 33 33.952  +13 03 07.11  22.7G 11QF99    F51  C~2r7L      
2010 11  01.31082  01 33 33.797  +13 03 06.46  22.6G 11QF99    F51  C~2r7L      
2010 11  01.32926  01 33 33.624  +13 03 05.36  23.2G 11QF99    F51  C~2r7L      
2011 08  29.52378  01 57 34.729  +14 35 44.64  22.8r 11QF99    568  C~0qBd      
2011 08  29.56781  01 57 34.534  +14 35 43.67  22.9r 11QF99    568  C~0qBd      
2011 08  29.61470  01 57 34.343  +14 35 42.59  22.9r 11QF99    568  C~0qBd      
2011 09  05.55403  01 57 02.688  +14 32 44.42  22.6r 11QF99    568  C~0qBd      
2011 10  24.41192  01 50 39.869  +13 54 31.38  22.6r 11QF99    568  C~0qBd      
2011 10  24.43329  01 50 39.669  +13 54 30.16  22.6r 11QF99    568  C~0qBd      
2011 10  24.45467  01 50 39.467  +13 54 28.85  22.6r 11QF99    568  C~0qBd      
2011 10  24.47598  01 50 39.267  +13 54 27.68  22.6r 11QF99    568  C~0qBd      
2011 10  24.49734  01 50 39.070  +13 54 26.35  22.5r 11QF99    568  C~0qBd      
2011 10  24.51878  01 50 38.864  +13 54 25.16  22.6r 11QF99    568  C~0qBd      
2011 10  28.30888  01 50 03.916  +13 50 42.62  22.3r 11QF99    568  C~0qBd      
2011 10  28.48864  01 50 02.228  +13 50 32.00  22.5r 11QF99    568  C~0qBd      
2011 10  30.53322  01 49 43.457  +13 48 31.33  22.6r 11QF99    568  C~0qBd      
2011 10  31.51590  01 49 34.481  +13 47 33.30  22.4r 11QF99    568  C~0qBd      
2011 11  24.24514  01 46 15.827  +13 25 07.81  22.7r 11QF99    568  C~0qBd      
2011 11  26.46510  01 45 59.909  +13 23 13.04        11QF99    568  C~0qBd      
2012 01  25.25212  01 44 01.928  +12 58 28.59  22.9r 11QF99    568  C~0qBd      
2012 01  26.23689  01 44 05.667  +12 58 35.77        11QF99    568  C~0qBd      
2012 01  27.29405  01 44 09.873  +12 58 44.53  23.0r 11QF99    568  C~0qBd      
2012 02  15.25232  01 46 00.063  +13 04 42.69  22.9r 11QF99    568  C~0qBd      
2012 08  23.53769  02 13 55.018  +15 15 10.94  22.9r 11QF99    568  C~0qBd      
2012 08  24.57339  02 13 52.461  +15 14 55.28  22.8r 11QF99    568  C~0qBd      
2012 10  17.40813  02 07 59.975  +14 40 38.36  22.6r 11QF99    568  C~0qBe      
2012 10  17.42550  02 07 59.808  +14 40 37.37  22.6r 11QF99    568  C~0qBe      
2012 10  20.46016  02 07 31.588  +14 37 48.92  22.4r 11QF99    568  C~0qBe      
2012 10  20.50496  02 07 31.159  +14 37 46.43  22.6r 11QF99    568  C~0qBe      
2012 10  21.31465  02 07 23.618  +14 37 01.02  22.6r 11QF99    568  C~0qBe      
2012 10  21.34035  02 07 23.375  +14 36 59.61  22.6r 11QF99    568  C~0qBe      
2012 10  21.36603  02 07 23.133  +14 36 58.12  22.6r 11QF99    568  C~0qBe      
2012 11  02.33506  02 05 30.693  +14 25 35.01  21.7G 11QF99    F51  C~2r7L      
2012 11  07.29076  02 04 44.836  +14 20 50.11  22.8G 11QF99    F51  C~2r7L      
2013 01  14.35870  01 59 04.855  +13 37 58.02  22.8r 11QF99    568  C~43yM      
2013 02  02.24144  01 59 58.622  +13 38 57.75        11QF99    568  C~43yM      
2013 02  03.24708  02 00 03.430  +13 39 11.60        11QF99    568  C~43yM      
2013 02  17.26070  02 01 29.713  +13 44 10.35  22.6r 11QF99    568  C~43yM      
2013 07  13.59198  02 28 43.843  +15 44 39.19  22.6G 11QF99    F51  C~2r7L      
2013 09  06.57920  02 29 42.59   +15 45 05.1         11QF99    568  C~43yM      
2013 09  09.40907  02 29 30.22   +15 43 50.5         11QF99    568  C~43yM      
2013 09  09.47309  02 29 29.93   +15 43 48.7         11QF99    568  C~43yM      
2014 07  29.60798  02 46 29.616  +16 19 16.30  21.7G 11QF99    F51  C~2r7L      
2014 11  17.48513  02 37 18.676  +15 22 52.76  22.6G 11QF99    F51  C~2r7L      
2014 11  21.45782  02 36 41.547  +15 19 25.56  23.0G 11QF99    F51  C~2r7L      
2014 12  13.34360  02 33 43.784  +15 02 26.44  22.8G 11QF99    F51  C~2r7L      
2014 12  13.35656  02 33 43.675  +15 02 25.74  23.5G 11QF99    F51  C~2r7L      
2014 12  13.36949  02 33 43.578  +15 02 25.45  22.5G 11QF99    F51  C~2r7L      
2014 12  13.38248  02 33 43.518  +15 02 25.03  23.0G 11QF99    F51  C~2r7L      
2015 01  22.23121  02 31 38.121  +14 47 12.64  22.9G 11QF99    F51  C~2r7L      
2015 01  22.24657  02 31 38.143  +14 47 12.51  22.6G 11QF99    F51  C~2r7L      
2015 01  22.26190  02 31 38.143  +14 47 12.55  22.9G 11QF99    F51  C~2r7L      
2015 01  22.27730  02 31 38.156  +14 47 12.26  23.3G 11QF99    F51  C~2r7L      
2015 09  09.47513  03 04 11.487  +16 41 09.15  22.9G 11QF99    F51  C~2r7L      
2015 09  09.48741  03 04 11.444  +16 41 08.77  22.9G 11QF99    F51  C~2r7L      
2015 09  09.49968  03 04 11.412  +16 41 08.34  22.9G 11QF99    F51  C~2r7L      
2015 09  09.51197  03 04 11.360  +16 41 08.41  22.9G 11QF99    F51  C~2r7L      
2015 10  10.60771  03 01 10.966  +16 23 31.45  22.4G 11QF99    F51  C~2r7L      
2015 11  06.51232  02 57 00.102  +16 01 42.40  22.2G 11QF99    F51  C~2r7L      
2015 11  08.36969  02 56 41.530  +16 00 07.37  23.2G 11QF99    F51  C~2r7L      
2015 12  04.26071  02 52 33.353  +15 38 49.12  22.8G 11QF99    F51  C~2r7L      
2015 12  04.27128  02 52 33.270  +15 38 48.42  22.2G 11QF99    F51  C~2r7L      
2015 12  04.29253  02 52 33.086  +15 38 47.57  22.4G 11QF99    F51  C~2r7L      
2016 10  07.45092  03 19 51.711  +16 47 37.24  22.3G 11QF99    F51  C~2r7L      
2016 10  07.46394  03 19 51.629  +16 47 36.94  22.4G 11QF99    F51  C~2r7L      
2016 10  07.47696  03 19 51.502  +16 47 36.16  22.5G 11QF99    F51  C~2r7L      
2016 10  07.49004  03 19 51.418  +16 47 35.66  22.4G 11QF99    F51  C~2r7L      
2016 10  25.55753  03 17 17.156  +16 34 26.77  23.1G 11QF99    F51  C~2r7L      
2016 10  25.58470  03 17 16.882  +16 34 25.37  22.7G 11QF99    F51  C~2r7L      
2017 10  28.56143  03 35 51.414  +16 49 55.58  22.1G 11QF99    F51  C~2r7L      
2017 10  28.57382  03 35 51.285  +16 49 55.08  22.8G 11QF99    F51  C~2r7L      
2017 10  28.58621  03 35 51.172  +16 49 54.44  22.7G 11QF99    F51  C~2r7L      
2017 10  28.59852  03 35 51.066  +16 49 53.85  22.2G 11QF99    F51  C~2r7L      
2017 11  17.52316  03 32 28.857  +16 34 46.45  22.0G 11QF99    F51  C~2r7L      
2017 11  17.53526  03 32 28.748  +16 34 46.19  22.4G 11QF99    F51  C~2r7L      
2017 12  07.27956  03 29 08.190  +16 20 32.45  21.0G 11QF99    F51  C~2r7L      
2017 12  07.29330  03 29 08.010  +16 20 32.03  21.4G 11QF99    F51  C~2r7L      
2017 12  07.30700  03 29 07.870  +16 20 31.32  22.0G 11QF99    F51  C~2r7L      
2017 12  08.27996  03 28 58.637  +16 19 52.63  22.6w 11QF99    F51  C~2SCr      
2017 12  08.29467  03 28 58.485  +16 19 51.81  22.6w 11QF99    F51  C~2SCr      
2017 12  08.30941  03 28 58.370  +16 19 51.64  22.2w 11QF99    F51  C~2SCr      
2017 12  09.26812  03 28 49.334  +16 19 13.99  22.2G 11QF99    F51  C~2r7L      
2017 12  09.28183  03 28 49.183  +16 19 13.29  22.3G 11QF99    F51  C~2r7L      
2017 12  09.29542  03 28 49.072  +16 19 12.88  22.3G 11QF99    F51  C~2r7L      
2017 12  09.30903  03 28 48.930  +16 19 12.50  22.4G 11QF99    F51  C~2r7L      
2018 12  18.085933 03 46 54.97   +16 27 42.2   22.4V 11QF99    H21  C~2rXq      
2018 12  18.095059 03 46 54.87   +16 27 42.3   22.6V 11QF99    H21  C~2rXq      
2018 12  18.108241 03 46 54.71   +16 27 41.6   22.8V 11QF99    H21  C~2rXq      

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    -0.04       0.00    -0.31
     2   0.0000      0.00     0.05       0.00    -0.36
     3   0.0000      0.00     0.05       0.00    -0.31
     4   1.9957      0.00     0.28       0.00    -0.22
     5   1.9958      0.00     0.04       0.00     0.06
     6   1.9958      0.00    -0.09       0.00     0.07
     7   2.8204      0.00     0.14       0.00     0.10
     8   2.8206      0.00    -0.04       0.00     0.10
     9   2.8207      0.00     0.03       0.00     0.07
    10   2.8397      0.00    -0.02       0.00    -0.08
    11   2.9735      0.00    -0.14       0.00     0.14
    12   2.9735      0.00    -0.12       0.00     0.17
    13   2.9736      0.00    -0.13       0.00     0.11
    14   2.9736      0.00    -0.11       0.00     0.19
    15   2.9737      0.00    -0.05       0.00     0.12
    16   2.9738      0.00    -0.12       0.00     0.19
    17   2.9841      0.00    -0.02       0.00     0.27
    18   2.9846      0.00    -0.05       0.00     0.24
    19   2.9902      0.00    -0.06       0.00     0.14
    20   2.9929      0.00    -0.08       0.00     0.07
    21   3.0579      0.00    -0.13       0.00     0.08
    22   3.0640      0.00    -0.18       0.00     0.19
    23   3.2276      0.00     0.19       0.00    -0.03
    24   3.2303      0.00     0.12       0.00     0.07
    25   3.2332      0.00    -0.01       0.00     0.07
    26   3.2851      0.00    -0.10       0.00     0.15
    27   3.8061      0.00     0.05       0.00     0.04
    28   3.8089      0.00    -0.06       0.00    -0.01
    29   3.9563      0.00     0.10       0.00     0.05
    30   3.9564      0.00     0.06       0.00     0.01
    31   3.9647      0.00     0.09       0.00    -0.06
    32   3.9648      0.00     0.05       0.00    -0.04
    33   3.9670      0.00     0.03       0.00    -0.06
    34   3.9671      0.00     0.05       0.00    -0.04
    35   3.9672      0.00     0.09       0.00    -0.09
    36   3.9999      0.00     0.25       0.00     0.07
    37   4.0135      0.00     0.18       0.00    -0.31
    38   4.1999      0.00    -0.08       0.00    -0.05
    39   4.2516      0.00    -0.11       0.00     0.02
    40   4.2543      0.00    -0.08       0.00     0.05
    41   4.2927      0.00    -0.20       0.00     0.02
    42   4.6933      0.00    -0.05       0.00     0.17
    43   4.8439      0.00    -0.00       0.00     0.19
    44   4.8516      0.00    -0.39       0.00     0.27
    45   4.8518      0.00    -0.18       0.00     0.20
    46   5.7365      0.00     0.30       0.00    -0.24
    47   6.0401      0.00     0.17       0.00     0.03
    48   6.0509      0.00     0.39       0.00    -0.26
    49   6.1109      0.00     0.20       0.00    -0.14
    50   6.1109      0.00    -0.08       0.00    -0.32
    51   6.1109      0.00    -0.20       0.00    -0.09
    52   6.1110      0.00     0.25       0.00     0.02
    53   6.2201      0.00     0.00       0.00    -0.00
    54   6.2201      0.00     0.18       0.00    -0.08
    55   6.2201      0.00     0.03       0.00     0.02
    56   6.2202      0.00     0.06       0.00    -0.21
    57   6.8504      0.00     0.04       0.00    -0.04
    58   6.8505      0.00    -0.01       0.00    -0.15
    59   6.8505      0.00     0.10       0.00    -0.30
    60   6.8505      0.00    -0.08       0.00     0.04
    61   6.9357      0.00    -0.05       0.00     0.02
    62   7.0093      0.00    -0.27       0.00    -0.47
    63   7.0144      0.00    -0.04       0.00     0.10
    64   7.0853      0.00    -0.16       0.00     0.05
    65   7.0853      0.00    -0.01       0.00    -0.18
    66   7.0854      0.00     0.05       0.00    -0.08
    67   7.9291      0.00    -0.02       0.00     0.02
    68   7.9291      0.00     0.23       0.00     0.23
    69   7.9291      0.00    -0.20       0.00    -0.03
    70   7.9292      0.00     0.03       0.00    -0.02
    71   7.9787      0.00     0.09       0.00     0.08
    72   7.9787      0.00    -0.08       0.00    -0.04
    73   8.9862      0.00    -0.09       0.00    -0.03
    74   8.9862      0.00    -0.22       0.00     0.03
    75   8.9863      0.00    -0.11       0.00    -0.05
    76   8.9863      0.00     0.09       0.00    -0.09
    77   9.0408      0.00    -0.31       0.00    -0.27
    78   9.0409      0.00    -0.02       0.00     0.02
    79   9.0949      0.00     0.45       0.00     0.04
    80   9.0950      0.00    -0.25       0.00     0.17
    81   9.0950      0.00    -0.35       0.00    -0.00
    82   9.0977      0.00    -0.04       0.00    -0.10
    83   9.0977      0.00    -0.19       0.00    -0.35
    84   9.0978      0.00     0.22       0.00     0.06
    85   9.1004      0.00     0.07       0.00    -0.00
    86   9.1004      0.00    -0.23       0.00    -0.17
    87   9.1005      0.00     0.06       0.00    -0.06
    88   9.1005      0.00    -0.12       0.00     0.09
    89  10.1238      0.00     0.66       0.00     0.17
    90  10.1239      0.00     0.43       0.00     0.57
    91  10.1239      0.00    -0.14       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.

11QF99    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        19.180    19.180    19.180
ecceobj         0.173     0.173     0.173
incobj         10.788    10.788    10.788
qmin           13.992    14.865    14.692
qmax           24.568    23.960    23.425
amean          19.223    19.284    19.190
amin           18.774    18.769    18.794
amax           19.706    19.714    19.604
emean           0.210     0.167     0.188
emin            0.172     0.062     0.165
emax            0.263     0.218     0.221
imean           8.600    12.222    10.978
imin            4.123    10.599     9.463
imax           11.742    16.414    11.742
excite_mean     0.262     0.274     0.268
fracstop        0.035     0.045     0.036
cjmean          3.110     3.103     3.109

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       179.2     161.4     194.3
kozaiamp        179.5     179.5     178.8