Orbit Fit and Astrometric record for 09JZ18

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: 09JZ18    
# Created Wed Dec  8 02:10:46 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     94 observations of     94
# Arc:  16.10y
# First observation: 2005/04/02
#  Last observation: 2021/05/08
# Chi-squared of fit:    92.76 DOF:    182 RMS:  0.18
# Min/Max residuals:    -0.96    0.49
# Exact a, adot, b, bdot, g, gdot:
  1.777722E-05  3.842677E-02 -4.999290E-06 -1.138001E-02  3.289843E-02 -6.326640E-03
# Covariance matrix:
  1.5617E-13 -2.7456E-14 -2.0470E-14  5.8554E-15  1.3381E-15 -2.5155E-14
 -2.7456E-14  6.3681E-15  5.9306E-15 -1.6613E-15  1.1293E-15  7.1040E-15
 -2.0470E-14  5.9306E-15  9.3304E-14 -9.7792E-15  4.6446E-15  7.6084E-15
  5.8554E-15 -1.6613E-15 -9.7792E-15  1.3575E-15 -4.4030E-16 -2.1402E-15
  1.3381E-15  1.1293E-15  4.6446E-15 -4.4030E-16  3.7979E-14  1.0633E-15
 -2.5155E-14  7.1040E-15  7.6084E-15 -2.1402E-15  1.0633E-15  9.1605E-15
#      lat0       lon0       xBary       yBary       zBary        JD0
   17.749205  171.939627   -0.351812    0.283934   -0.886801  2453462.826768
# Heliocentric elements and errors
Epoch:              2453462.5000  =  2005/04/02
Mean Anomaly:          334.43674 +/-     0.002
Argument of Peri:      175.47229 +/-     0.003
Long of Asc Node:       37.23245 +/-     0.000
Inclination:            23.81856 +/-     0.000
Eccentricity:         0.25242147 +/-    0.0000
Semi-Major Axis:     39.62626549 +/-    0.0013
Time of Perihelion: 2459932.2412 +/-       4.2
Perihelion:          29.62374533 +/-    0.0012
Aphelion:            49.62878564 +/-    0.0018
Period (y)              249.4497 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -29.63942413 +/-    0.0002
Ecliptic Y            3.84056729 +/-    0.0000
Ecliptic Z            9.26632130 +/-    0.0001
Ecliptic XDOT        -0.00023746 +/-    0.0000
Ecliptic YDOT        -0.00320328 +/-    0.0000
Ecliptic ZDOT        -0.00106243 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.29081994 +/-    0.0002
Geocenter to KBO     30.39672549 +/-    0.0002
# Hcoef:  7.69

The following table shows the complete astrometric record for 09JZ18. 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 (09JZ18) followed by the observatory code and reference code for the source of the astrometry.

2005 04  02.326025 11 59 41.63   +19 26 23.1   22.7V 09JZ18    645  C~1vW3      
2005 04  02.326854 11 59 41.63   +19 26 23.1   22.2V 09JZ18    645  C~1vW3      
2005 04  02.329342 11 59 41.61   +19 26 23.1   23.2V 09JZ18    645  C~1vW3      
2005 06  07.175567 11 55 29.93   +19 14 54.9         09JZ18    645  C~1vW3      
2005 06  07.176400 11 55 29.93   +19 14 54.9         09JZ18    645  C~1vW3      
2005 06  07.178889 11 55 29.93   +19 14 54.8         09JZ18    645  C~1vW3      
2009 02  27.36881  12 32 10.21   +12 47 16.1   22.7r 09JZ18    568  C~59g5      
2009 02  28.35374  12 32 04.95   +12 47 55.3   22.8r 09JZ18    568  C~59g5      
2009 02  28.38364  12 32 04.78   +12 47 56.8   22.6r 09JZ18    568  C~59g5      
2009 02  28.39774  12 32 04.71   +12 47 57.3   23.0r 09JZ18    568  C~59g5      
2009 03  29.44359  12 29 09.35   +13 05 16.8   24.0r 09JZ18    568  C~59g5      
2009 03  29.47197  12 29 09.17   +13 05 17.7   22.6r 09JZ18    568  C~59g5      
2009 03  29.54231  12 29 08.72   +13 05 19.8   22.9r 09JZ18    568  C~59g5      
2009 03  30.32858  12 29 03.76   +13 05 42.6   22.2r 09JZ18    568  C~59g5      
2009 05  14.360998 12 24 56.810  +13 14 16.60  22.5i 09JZ18    568  C~0aRU      
2009 05  15.269616 12 24 53.280  +13 14 08.80  23.0g 09JZ18    568  C~0aRU      
2009 05  15.337143 12 24 53.010  +13 14 08.30  22.6i 09JZ18    568  C~0aRU      
2009 05  15.399171 12 24 52.760  +13 14 07.60  22.4i 09JZ18    568  C~0aRU      
2009 05  15.437580 12 24 52.610  +13 14 07.30  22.3i 09JZ18    568  C~0aRU      
2009 05  22.387021 12 24 28.330  +13 12 41.50  23.3g 09JZ18    568  C~0aRU      
2009 05  24.296150 12 24 22.540  +13 12 10.10  23.0g 09JZ18    568  C~0aRU      
2010 02  24.60709  12 39 33.770  +11 05 48.84  22.7G 09JZ18    F51  C~2rXn      
2010 04  17.44712  12 34 23.040  +11 33 27.21  22.5G 09JZ18    F51  C~2rXn      
2011 01  27.67214  12 48 16.916  +09 08 39.92  22.1G 09JZ18    F51  C~2rXn      
2011 04  02.39070  12 43 07.302  +09 46 32.69  22.4G 09JZ18    F51  C~2rXn      
2012 04  15.35783  12 48 49.873  +08 10 06.58  22.1G 09JZ18    F51  C~2rXn      
2012 06  16.31386  12 44 39.868  +08 07 49.50  22.6G 09JZ18    F51  C~2rXn      
2013 01  11.61386  13 02 24.108  +05 40 39.79  22.8G 09JZ18    F51  C~2rXn      
2013 04  17.33624  12 55 48.002  +06 27 11.33  22.1G 09JZ18    F51  C~2rXn      
2014 03  24.44823  13 05 29.694  +04 30 38.40  22.4w 09JZ18    F51  C~1vW3      
2014 03  24.46170  13 05 29.617  +04 30 38.70  22.5w 09JZ18    F51  C~1vW3      
2014 03  24.47522  13 05 29.522  +04 30 39.12  22.5w 09JZ18    F51  C~1vW3      
2014 04  23.34164  13 02 22.300  +04 44 31.40  22.5G 09JZ18    F51  C~2rXn      
2014 04  29.26220  13 01 47.176  +04 46 21.33  22.1w 09JZ18    F51  C~1vW3      
2014 04  29.27409  13 01 47.101  +04 46 21.82  22.5w 09JZ18    F51  C~1vW3      
2014 04  29.29787  13 01 46.950  +04 46 22.01  22.5w 09JZ18    F51  C~1vW3      
2014 05  24.31367  12 59 42.787  +04 49 24.63  22.5w 09JZ18    F51  C~1vW3      
2014 05  24.32597  12 59 42.723  +04 49 24.66  22.8w 09JZ18    F51  C~1vW3      
2014 05  24.33825  12 59 42.695  +04 49 24.77  22.3w 09JZ18    F51  C~1vW3      
2014 05  24.35051  12 59 42.641  +04 49 24.99  22.3w 09JZ18    F51  C~1vW3      
2014 05  27.30439  12 59 31.410  +04 49 13.41  21.9G 09JZ18    F51  C~2rXn      
2014 06  18.29342  12 58 36.631  +04 44 01.23  22.3w 09JZ18    F51  C~1vW3      
2014 06  18.31755  12 58 36.616  +04 44 00.67  22.5w 09JZ18    F51  C~1vW3      
2014 06  18.32965  12 58 36.601  +04 44 00.51  22.4w 09JZ18    F51  C~1vW3      
2014 07  01.26787  12 58 30.327  +04 37 52.64  22.5G 09JZ18    F51  C~2rXn      
2014 07  01.29078  12 58 30.328  +04 37 51.70  22.7G 09JZ18    F51  C~2rXn      
2014 07  01.30222  12 58 30.331  +04 37 51.45  22.4G 09JZ18    F51  C~2rXn      
2015 01  08.57608  13 16 15.037  +02 15 07.31  22.4G 09JZ18    F51  C~2rXn      
2015 03  25.43148  13 12 36.379  +02 45 05.24  22.3G 09JZ18    F51  C~2rXn      
2015 03  27.46351  13 12 23.922  +02 46 10.69  22.3w 09JZ18    F51  C~1vW3      
2015 03  27.47859  13 12 23.836  +02 46 11.07  22.1w 09JZ18    F51  C~1vW3      
2015 03  27.49368  13 12 23.751  +02 46 11.67  22.3w 09JZ18    F51  C~1vW3      
2015 03  27.51175  13 12 23.616  +02 46 12.12  22.2w 09JZ18    F51  C~1vW3      
2015 04  15.49018  13 10 23.674  +02 55 32.59  22.6G 09JZ18    F51  C~2rXn      
2015 04  16.34216  13 10 18.299  +02 55 54.38  21.8G 09JZ18    F51  C~2rXn      
2015 04  18.34149  13 10 05.690  +02 56 45.14  22.2G 09JZ18    F51  C~2rXn      
2015 04  18.35605  13 10 05.610  +02 56 45.45  23.0G 09JZ18    F51  C~2rXn      
2015 04  18.37059  13 10 05.508  +02 56 45.60  22.9G 09JZ18    F51  C~2rXn      
2015 04  18.38539  13 10 05.407  +02 56 45.78  22.7G 09JZ18    F51  C~2rXn      
2015 06  08.26543  13 05 59.115  +03 03 22.92  22.7w 09JZ18    F51  C~1vW3      
2015 06  08.27718  13 05 59.086  +03 03 22.76  22.8w 09JZ18    F51  C~1vW3      
2015 06  08.28889  13 05 59.047  +03 03 22.59  22.6w 09JZ18    F51  C~1vW3      
2015 06  08.30063  13 05 59.022  +03 03 22.49  22.8w 09JZ18    F51  C~1vW3      
2016 01  15.63298  13 23 23.095  +00 31 53.35  22.7G 09JZ18    F51  C~2rXn      
2016 01  17.62579  13 23 24.628  +00 32 02.69  22.6G 09JZ18    F51  C~2rXn      
2016 02  05.62554  13 23 13.491  +00 35 55.74  22.2G 09JZ18    F51  C~2rXn      
2016 02  15.63432  13 22 49.531  +00 39 29.51  22.8G 09JZ18    F51  C~2rXn      
2016 02  21.59122  13 22 29.838  +00 42 00.74  22.7G 09JZ18    F51  C~2rXn      
2016 03  01.58736  13 21 53.241  +00 46 14.57  22.2G 09JZ18    F51  C~2rXn      
2016 03  30.40694  13 19 14.191  +01 01 20.54  22.2G 09JZ18    F51  C~2rXn      
2016 04  05.41896  13 18 36.283  +01 04 23.80  22.4G 09JZ18    F51  C~2rXn      
2016 04  05.43384  13 18 36.191  +01 04 24.18  22.5G 09JZ18    F51  C~2rXn      
2016 04  05.44527  13 18 36.112  +01 04 24.23  22.3G 09JZ18    F51  C~2rXn      
2016 04  05.45673  13 18 36.063  +01 04 24.61  22.7G 09JZ18    F51  C~2rXn      
2016 04  05.52613  13 18 35.598  +01 04 26.77  22.2G 09JZ18    F51  C~2rXn      
2016 04  05.53760  13 18 35.527  +01 04 27.16  22.4G 09JZ18    F51  C~2rXn      
2016 04  05.55990  13 18 35.368  +01 04 27.68  22.0G 09JZ18    F51  C~2rXn      
2016 06  09.28458  13 12 59.643  +01 18 12.45  22.5G 09JZ18    F51  C~2rXn      
2017 01  30.62287  13 30 27.493  -01 10 40.63  22.3G 09JZ18    F51  C~2rXn      
2017 04  26.36788  13 23 40.132  -00 33 55.66  21.9G 09JZ18    F51  C~2rXn      
2017 04  26.37855  13 23 40.080  -00 33 55.09  22.0G 09JZ18    F51  C~2rXn      
2017 04  26.38922  13 23 40.005  -00 33 54.93  22.3G 09JZ18    F51  C~2rXn      
2017 04  26.39990  13 23 39.938  -00 33 54.63  22.1G 09JZ18    F51  C~2rXn      
2018 03  18.47471  13 35 00.241  -02 39 55.52  22.2G 09JZ18    F51  C~2rXn      
2018 03  18.48653  13 35 00.185  -02 39 55.37  22.2G 09JZ18    F51  C~2rXn      
2018 03  18.49841  13 35 00.120  -02 39 55.01  22.0G 09JZ18    F51  C~2rXn      
2018 03  18.51033  13 35 00.056  -02 39 54.77  22.2G 09JZ18    F51  C~2rXn      
2020 04  19.45186  13 46 23.460  -06 00 42.75  22.0w 09JZ18    F52  C~3qFn      
2020 04  19.46298  13 46 23.390  -06 00 42.63  22.1w 09JZ18    F52  C~3qFn      
2020 04  19.47407  13 46 23.319  -06 00 41.97  22.1w 09JZ18    F52  C~3qFn      
2020 04  19.48516  13 46 23.233  -06 00 42.25  22.0w 09JZ18    F52  C~3qFn      
2021 05  08.357032 13 51 50.538  -07 41 21.32  22.1w 09JZ18    F51  C~4mxe      
2021 05  08.368000 13 51 50.456  -07 41 21.28  22.3w 09JZ18    F51  C~4mxe      
2021 05  08.389942 13 51 50.354  -07 41 20.68  22.2w 09JZ18    F51  C~4mxe      

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    -0.15
     2   0.0000      0.00     0.17       0.00    -0.16
     3   0.0000      0.00     0.11       0.00    -0.21
     4   0.1803      0.00    -0.18       0.00    -0.14
     5   0.1803      0.00    -0.18       0.00    -0.11
     6   0.1803      0.00    -0.16       0.00    -0.11
     7   3.9070      0.00    -0.15       0.00     0.19
     8   3.9097      0.00     0.09       0.00    -0.07
     9   3.9098      0.00    -0.01       0.00     0.22
    10   3.9098      0.00     0.10       0.00     0.16
    11   3.9894      0.00    -0.08       0.00     0.17
    12   3.9894      0.00    -0.02       0.00     0.24
    13   3.9896      0.00     0.04       0.00     0.30
    14   3.9918      0.00     0.17       0.00     0.34
    15   4.1151      0.00     0.13       0.00    -0.03
    16   4.1176      0.00     0.11       0.00    -0.05
    17   4.1178      0.00     0.07       0.00     0.06
    18   4.1179      0.00    -0.00       0.00    -0.06
    19   4.1180      0.00     0.01       0.00    -0.00
    20   4.1371      0.00    -0.12       0.00    -0.03
    21   4.1423      0.00    -0.08       0.00    -0.09
    22   4.8988      0.00    -0.29       0.00     0.41
    23   5.0407      0.00    -0.07       0.00    -0.23
    24   5.8216      0.00     0.02       0.00     0.08
    25   5.9988      0.00     0.26       0.00    -0.13
    26   7.0364      0.00    -0.07       0.00    -0.23
    27   7.2060      0.00    -0.96       0.00    -0.41
    28   7.7790      0.00     0.07       0.00    -0.10
    29   8.0411      0.00     0.29       0.00    -0.10
    30   8.9750      0.00    -0.15       0.00     0.24
    31   8.9750      0.00    -0.04       0.00     0.09
    32   8.9751      0.00    -0.20       0.00     0.07
    33   9.0569      0.00     0.03       0.00     0.06
    34   9.0731      0.00     0.30       0.00    -0.00
    35   9.0731      0.00     0.23       0.00     0.29
    36   9.0732      0.00     0.07       0.00     0.08
    37   9.1417      0.00    -0.07       0.00    -0.29
    38   9.1417      0.00    -0.28       0.00    -0.23
    39   9.1417      0.00     0.05       0.00    -0.09
    40   9.1418      0.00    -0.02       0.00     0.17
    41   9.1498      0.00     0.02       0.00    -0.18
    42   9.2100      0.00     0.03       0.00    -0.05
    43   9.2101      0.00     0.30       0.00    -0.04
    44   9.2101      0.00     0.32       0.00     0.08
    45   9.2456      0.00     0.08       0.00    -0.04
    46   9.2456      0.00     0.03       0.00    -0.21
    47   9.2457      0.00     0.04       0.00    -0.08
    48   9.7693      0.00     0.10       0.00     0.03
    49   9.9770      0.00    -0.17       0.00     0.49
    50   9.9826      0.00    -0.02       0.00     0.08
    51   9.9826      0.00     0.11       0.00    -0.02
    52   9.9827      0.00     0.26       0.00     0.09
    53   9.9827      0.00    -0.06       0.00    -0.04
    54  10.0347      0.00     0.01       0.00    -0.05
    55  10.0370      0.00    -0.01       0.00    -0.24
    56  10.0425      0.00    -0.12       0.00     0.31
    57  10.0425      0.00     0.07       0.00     0.26
    58  10.0426      0.00    -0.06       0.00     0.05
    59  10.0426      0.00    -0.15       0.00    -0.13
    60  10.1819      0.00    -0.10       0.00     0.28
    61  10.1819      0.00    -0.05       0.00     0.26
    62  10.1820      0.00    -0.15       0.00     0.23
    63  10.1820      0.00    -0.04       0.00     0.26
    64  10.7880      0.00     0.02       0.00     0.06
    65  10.7934      0.00     0.10       0.00    -0.11
    66  10.8454      0.00     0.09       0.00    -0.22
    67  10.8728      0.00     0.05       0.00    -0.29
    68  10.8892      0.00    -0.22       0.00     0.10
    69  10.9138      0.00     0.14       0.00     0.14
    70  10.9927      0.00     0.02       0.00    -0.05
    71  11.0092      0.00    -0.06       0.00     0.13
    72  11.0092      0.00     0.00       0.00     0.07
    73  11.0092      0.00    -0.07       0.00    -0.22
    74  11.0093      0.00     0.31       0.00    -0.18
    75  11.0094      0.00     0.07       0.00    -0.09
    76  11.0095      0.00     0.12       0.00    -0.04
    77  11.0095      0.00    -0.10       0.00    -0.18
    78  11.1867      0.00     0.09       0.00     0.03
    79  11.8311      0.00    -0.00       0.00    -0.18
    80  12.0658      0.00    -0.13       0.00    -0.39
    81  12.0659      0.00     0.10       0.00    -0.06
    82  12.0659      0.00    -0.02       0.00    -0.14
    83  12.0659      0.00    -0.01       0.00    -0.08
    84  12.9587      0.00    -0.13       0.00     0.15
    85  12.9587      0.00     0.03       0.00    -0.04
    86  12.9587      0.00     0.06       0.00    -0.03
    87  12.9588      0.00     0.11       0.00    -0.13
    88  15.0476      0.00    -0.07       0.00     0.20
    89  15.0476      0.00    -0.01       0.00     0.03
    90  15.0476      0.00     0.03       0.00     0.40
    91  15.0477      0.00    -0.16       0.00    -0.17
    92  16.0986      0.00    -0.17       0.00     0.03
    93  16.0987      0.00    -0.36       0.00    -0.16
    94  16.0987      0.00     0.18       0.00    -0.03

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.

09JZ18    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.158    39.158    39.159
ecceobj         0.244     0.244     0.244
incobj         23.882    23.882    23.882
qmin           27.821    27.788    27.845
qmax           51.705    51.700    51.714
amean          39.454    39.455    39.454
amin           38.939    38.946    38.939
amax           40.062    40.070    40.069
emean           0.265     0.264     0.266
emin            0.241     0.241     0.241
emax            0.293     0.294     0.293
imean          22.587    22.624    22.575
imin           21.830    21.827    21.833
imax           23.479    23.479    23.479
excite_mean     0.467     0.467     0.467
fracstop        1.000     1.000     1.000
cjmean          2.801     2.801     2.801

libcent 0       180.1     179.1     179.9
libamp  0       120.3     120.8     120.0
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       187.6     186.0     188.1
kozaiamp        180.0     180.0     180.0