Orbit Fit and Astrometric record for 309239

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: 309239    
# Created Mon Oct 23 01:36:42 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   99 observations of  100
# Arc:  29.28y
# First observation: 1988/06/17
#  Last observation: 2017/09/26
# Chi-squared of fit:   241.37 DOF:  192 RMS:  0.28
# Min/Max residuals:    -0.75    1.11
# Exact a, adot, b, bdot, g, gdot:
  2.410850E-05  7.267277E-02 -5.921531E-06 -1.909241E-02  4.855494E-02  5.590042E-03
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
   35.072009  -57.632119    0.596555    0.471494   -0.671600  2447329.877590
# Heliocentric elements and errors
Epoch:              2447330.5000  =  1988/06/18
Mean Anomaly:            6.59383 +/-     0.000
Argument of Peri:       96.38656 +/-     0.000
Long of Asc Node:      187.11814 +/-     0.000
Inclination:            36.07399 +/-     0.000
Eccentricity:         0.30145836 +/-    0.0000
Semi-Major Axis:     30.29180275 +/-    0.0000
Time of Perihelion: 2446215.1243 +/-       0.0
Perihelion:          21.16008543 +/-    0.0000
Aphelion:            39.42352007 +/-    0.0000
Period (y)              166.7231 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            8.96311966 +/-    0.0000
Ecliptic Y          -15.25087415 +/-    0.0000
Ecliptic Z           11.83403809 +/-    0.0000
Ecliptic XDOT         0.00392696 +/-    0.0000
Ecliptic YDOT         0.00145863 +/-    0.0000
Ecliptic ZDOT        -0.00069994 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   21.28309257 +/-    0.0000
Geocenter to KBO     20.59522441 +/-    0.0000
# Hcoef:  6.88

The following table shows the complete astrometric record for 309239. 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 (309239) followed by the observatory code and reference code for the source of the astrometry.

1988 06  17.37694  19 47 41.45   +14 36 31.9         309239    261   ~08CC      
1990 06  23.41910  20 22 10.41   +14 11 59.7         309239    261   ~08CC      
2001 10  05.19845  23 00 06.14   +07 12 40.3   20.1R 309239    644  C~02Ml      
2001 10  05.20134  23 00 06.17   +07 12 40.3   20.1R 309239    644  C~02Ml      
2001 10  13.16284  22 59 20.74   +07 02 57.6   20.3R 309239    644  C~02Ml      
2001 10  13.18376  22 59 20.60   +07 02 56.1   19.9R 309239    644  C~02Ml      
2001 10  13.20478  22 59 20.51   +07 02 54.4   20.4R 309239    644  C~02Ml      
2002 09  04.50346  23 16 45.78   +07 09 12.4   20.3R 309239    644  C~02Ml      
2002 09  12.41400  23 15 49.45   +07 00 55.8   20.1V 309239    644  C~02ID      
2002 09  13.41120  23 15 42.32   +06 59 51.1   20.4V 309239    644  C~02ID      
2007 09  09.23245  00 16 06.45   +03 49 50.5   21.4R 309239    675  Cv5229      
2007 09  09.27937  00 16 06.18   +03 49 48.2   21.2R 309239    675  Cv5229      
2007 09  10.21510  00 16 00.21   +03 48 54.1   21.2R 309239    675  Cv5229      
2007 09  10.26053  00 15 59.95   +03 48 51.7   21.1R 309239    675  Cv5229      
2007 09  16.32701  00 15 20.47   +03 42 53.6         309239    675  Cw9849      
2007 09  16.38071  00 15 20.10   +03 42 50.7         309239    675  Cw9849      
2007 10  04.16552  00 13 20.6    +03 24 39.0         309239    688 YCw9849      
2007 10  04.22539  00 13 20.3    +03 24 35.7         309239    688 YCw9849      
2007 10  04.27782  00 13 19.9    +03 24 31.7         309239    688 YCw9849      
2007 10  14.94287  00 12 10.22   +03 13 37.8   19.8R 309239    246  C~05Fx      
2007 10  14.94476  00 12 10.20   +03 13 37.5         309239    246  C~05Fx      
2007 10  14.94943  00 12 10.16   +03 13 36.8         309239    246  C~05Fx      
2007 10  19.10984  00 11 44.26   +03 09 27.9         309239    675  Cw9849      
2007 10  19.16314  00 11 43.94   +03 09 25.0         309239    675  Cw9849      
2007 10  19.27107  00 11 43.28   +03 09 17.9         309239    675  Cw9849      
2007 11  06.15331  00 10 06.29   +02 52 48.3         309239    675  Cw9849      
2007 11  06.20744  00 10 06.04   +02 52 45.6         309239    675  Cw9849      
2007 11  06.26067  00 10 05.79   +02 52 42.8         309239    675  Cw9849      
2007 11  29.09113  00 08 50.21   +02 36 33.3         309239    675  Cw9849      
2007 11  29.14450  00 08 50.11   +02 36 31.8         309239    675  Cw9849      
2007 11  29.25668  00 08 49.89   +02 36 28.1         309239    675  Cw9849      
2008 07  29.34587  00 30 04.09   +03 43 16.9         309239    675  C~02Ml      
2008 07  29.39772  00 30 03.93   +03 43 15.4         309239    675  C~02Ml      
2008 07  29.45166  00 30 03.83   +03 43 13.8         309239    675  C~02Ml      
2008 07  30.33385  00 30 01.79   +03 42 46.3         309239    675  C~02Ml      
2008 10  02.230069 00 24 27.60   +02 48 45.2   20.8V 309239    645  C~1Sdi      
2008 10  02.230898 00 24 27.59   +02 48 45.2   20.5V 309239    645  C~1Sdi      
2008 10  02.233386 00 24 27.58   +02 48 45.1   21.2V 309239    645  C~1Sdi      
2008 10  23.13647  00 22 13.63   +02 28 14.3   20.0r 309239    695  C~02ID      
2008 10  24.23885  00 22 07.12   +02 27 13.1   19.5r 309239    695  C~02ID      
2008 10  24.31730  00 22 06.65   +02 27 08.7   19.6r 309239    695  C~02ID      
2008 11  30.07642  00 19 34.21   +02 00 10.3   20.9R 309239    688  C~02Ml      
2008 11  30.19001  00 19 33.95   +02 00 06.7         309239    688  C~02Ml      
2009 10  08.31124  00 34 29.60   +02 06 36.4   20.9R 309239    926  C~09pL      
2009 10  09.28369  00 34 23.22   +02 05 39.8   21.2R 309239    926  C~09pL      
2009 10  09.31095  00 34 23.01   +02 05 37.6   21.3R 309239    926  C~09pL      
2010 10  04.43270  00 45 20.090  +01 35 03.78  20.9w 309239    F51  C~1vxG      
2010 10  04.44814  00 45 19.989  +01 35 03.02  21.0w 309239    F51  C~1vxG      
2010 10  04.46214  00 45 19.897  +01 35 02.13  20.9w 309239    F51  C~1vxG      
2010 10  14.07541  00 44 16.896  +01 25 50.48  20.9R 309239    809  C~0fCM      
2010 10  14.19222  00 44 16.099  +01 25 44.22  20.7R 309239    809  C~0fCM      
2010 10  14.30992  00 44 15.345  +01 25 38.13  20.8R 309239    809  C~0fCM      
2011 09  26.43124  00 56 19.427  +01 08 09.98  20.9w 309239    F51  C~1vxG      
2011 09  26.44525  00 56 19.336  +01 08 09.10  21.0w 309239    F51  C~1vxG      
2011 09  26.48003  00 56 19.106  +01 08 07.05  21.0w 309239    F51  C~1vxG      
2012 10  07.49316  01 04 52.642  +00 22 50.61  21.1r 309239    F51  C~1vxG      
2012 10  07.50477  01 04 52.568  +00 22 50.02  21.0r 309239    F51  C~1vxG      
2012 10  07.51852  01 04 52.480  +00 22 49.26  20.7i 309239    F51  C~1vxG      
2012 10  07.53126  01 04 52.391  +00 22 48.59  20.9i 309239    F51  C~1vxG      
2014 08  20.57306  01 27 45.696  +00 00 38.67  21.0i 309239    F51  C~1vxG      
2014 08  20.58446  01 27 45.666  +00 00 38.21  21.0i 309239    F51  C~1vxG      
2014 08  20.59588  01 27 45.631  +00 00 37.67  21.2i 309239    F51  C~1vxG      
2014 08  20.60730  01 27 45.592  +00 00 37.03  21.0i 309239    F51  C~1vxG      
2014 09  07.47730  01 26 37.617  -00 14 36.00  21.2i 309239    F51  C~1vxG      
2014 09  07.48940  01 26 37.543  -00 14 36.47  21.1i 309239    F51  C~1vxG      
2014 09  07.50155  01 26 37.488  -00 14 37.18  21.0i 309239    F51  C~1vxG      
2014 09  07.51377  01 26 37.446  -00 14 37.97  21.0i 309239    F51  C~1vxG      
2014 09  19.46347  01 25 36.108  -00 25 38.15  21.4w 309239    F51  C~1vxG      
2014 09  19.47579  01 25 36.037  -00 25 38.99  21.3w 309239    F51  C~1vxG      
2014 09  19.48819  01 25 35.971  -00 25 39.63  21.3w 309239    F51  C~1vxG      
2014 09  19.50063  01 25 35.900  -00 25 40.33  21.3w 309239    F51  C~1vxG      
2014 09  23.45984  01 25 13.412  -00 29 22.60  20.7w 309239    F51  C~1vxG      
2014 09  23.47219  01 25 13.341  -00 29 22.86  20.9w 309239    F51  C~1vxG      
2014 09  23.48459  01 25 13.254  -00 29 23.94  21.1w 309239    F51  C~1vxG      
2014 09  23.49705  01 25 13.178  -00 29 24.46  21.1w 309239    F51  C~1vxG      
2014 10  02.313345 01 24 20.20   -00 37 37.4   21.9g 309239    W84  C~1t0X      
2014 10  28.248738 01 21 35.78   -00 59 58.1   21.3i 309239    W84  C~1t0X      
2014 10  29.247315 01 21 29.59   -01 00 43.9   21.9g 309239    W84  C~1t0X      
2014 11  24.29177  01 19 07.660  -01 16 41.72  21.3w 309239    F51  C~1vxG      
2014 11  24.30523  01 19 07.596  -01 16 42.08  21.3w 309239    F51  C~1vxG      
2014 11  24.31865  01 19 07.536  -01 16 42.45  21.3w 309239    F51  C~1vxG      
2014 11  24.33206  01 19 07.477  -01 16 42.78  21.2w 309239    F51  C~1vxG      
2014 11  27.097963 01 18 55.48   -01 17 53.3   21.2z 309239    W84  C~1t0X      
2014 11  28.118218 01 18 51.24   -01 18 17.6   21.0z 309239    W84  C~1t0X      
2014 12  06.26584  01 18 21.323  -01 21 00.24  21.2i 309239    F51  C~1vxG      
2014 12  06.28050  01 18 21.264  -01 21 00.80  21.0i 309239    F51  C~1vxG      
2014 12  06.29514  01 18 21.225  -01 21 00.88  21.1i 309239    F51  C~1vxG      
2015 01  11.22251  01 17 45.494  -01 21 10.43  21.5w 309239    F51  C~1vxG      
2015 01  11.23756  01 17 45.515  -01 21 10.20  21.4w 309239    F51  C~1vxG      
2015 01  11.25239  01 17 45.535  -01 21 09.95  21.5w 309239    F51  C~1vxG      
2015 01  11.26752  01 17 45.554  -01 21 09.60  21.6w 309239    F51  C~1vxG      
2015 07  31.57797  01 37 07.957  -00 16 59.91  21.3i 309239    F51  C~1vxG      
2015 07  31.59903  01 37 07.948  -00 17 00.46  21.1i 309239    F51  C~1vxG      
2015 07  31.60929  01 37 07.928  -00 17 01.36  21.1i 309239    F51  C~1vxG      
2017 09  16.50240  01 52 11.974  -01 55 42.29  21.5w 309239    F51  C~2LLp      
2017 09  16.56205  01 52 11.671  -01 55 45.26  21.3w 309239    F51  C~2LLp      
2017 09  16.59116  01 52 11.516  -01 55 47.12  21.8w 309239    F51  C~2LLp      
2017 09  26.44503  01 51 20.639  -02 04 50.84  21.5w 309239    F51  C~2MNC      
2017 09  26.46999  01 51 20.495  -02 04 52.19  21.6w 309239    F51  C~2MNC      
2017 09  26.48230  01 51 20.409  -02 04 53.14  21.7w 309239    F51  C~2MNC      

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 (  -0.23)      0.00 (  -2.29)
  2   2.0152      0.00     0.12       0.00    -0.03
  3  13.3000      0.00    -0.56       0.00    -0.30
  4  13.3000      0.00     0.16       0.00    -0.09
  5  13.3218      0.00     0.21       0.00     0.14
  6  13.3219      0.00    -0.18       0.00     0.16
  7  13.3219      0.00     0.19       0.00    -0.01
  8  14.2153      0.00     0.24       0.00    -0.00
  9  14.2369      0.00     0.66       0.00    -0.34
 10  14.2397      0.00     0.39       0.00    -0.06
 11  19.2275      0.00    -0.36       0.00     0.02
 12  19.2277      0.00     0.11       0.00     0.41
 13  19.2302      0.00    -0.33       0.00     0.23
 14  19.2303      0.00     0.17       0.00     0.45
 15  19.2470      0.00    -0.46       0.00    -0.42
 16  19.2471      0.00    -0.59       0.00    -0.11
 17  19.2958      0.00    -0.75       0.00    -0.11
 18  19.2960      0.00     0.85       0.00     0.29
 19  19.2961      0.00     0.21       0.00    -0.46
 20  19.3253      0.00     0.85       0.00     0.58
 21  19.3253      0.00     0.73       0.00     0.39
 22  19.3253      0.00     0.58       0.00    -0.03
 23  19.3367      0.00    -0.24       0.00     0.08
 24  19.3369      0.00    -0.10       0.00     0.34
 25  19.3372      0.00     0.05       0.00    -0.37
 26  19.3861      0.00    -0.26       0.00     0.51
 27  19.3863      0.00    -0.15       0.00     0.55
 28  19.3864      0.00    -0.11       0.00     0.45
 29  19.4489      0.00    -0.29       0.00     0.02
 30  19.4491      0.00    -0.21       0.00     0.29
 31  19.4494      0.00    -0.20       0.00     0.32
 32  20.1149      0.00     0.35       0.00    -0.23
 33  20.1150      0.00    -0.26       0.00    -0.15
 34  20.1152      0.00     0.13       0.00    -0.11
 35  20.1176      0.00    -0.45       0.00    -0.30
 36  20.2925      0.00     0.48       0.00    -0.47
 37  20.2926      0.00     0.42       0.00    -0.42
 38  20.2926      0.00     0.52       0.00    -0.37
 39  20.3498      0.00    -0.13       0.00     0.05
 40  20.3528      0.00    -0.04       0.00     0.16
 41  20.3530      0.00    -0.06       0.00     0.10
 42  20.4537      0.00    -0.13       0.00     0.10
 43  20.4540      0.00    -0.40       0.00    -0.10
 44  21.3085      0.00     0.10       0.00     0.09
 45  21.3112      0.00     0.39       0.00     0.59
 46  21.3113      0.00    -0.02       0.00    -0.01
 47  22.2972      0.00     0.08       0.00    -0.14
 48  22.2973      0.00     0.12       0.00    -0.00
 49  22.2973      0.00     0.15       0.00    -0.08
 50  22.3236      0.00     0.81       0.00     0.25
 51  22.3239      0.00     0.43       0.00     0.57
 52  22.3243      0.00     0.74       0.00     1.11
 53  23.2746      0.00     0.17       0.00     0.06
 54  23.2747      0.00     0.16       0.00    -0.01
 55  23.2748      0.00     0.10       0.00    -0.05
 56  24.3070      0.00    -0.02       0.00    -0.08
 57  24.3070      0.00     0.02       0.00    -0.02
 58  24.3070      0.00     0.06       0.00    -0.01
 59  24.3071      0.00    -0.02       0.00     0.03
 60  26.1744      0.00     0.03       0.00    -0.10
 61  26.1744      0.00     0.09       0.00    -0.03
 62  26.1745      0.00     0.08       0.00    -0.02
 63  26.1745      0.00     0.01       0.00    -0.12
 64  26.2234      0.00     0.04       0.00    -0.08
 65  26.2234      0.00    -0.21       0.00     0.11
 66  26.2235      0.00    -0.16       0.00     0.06
 67  26.2235      0.00     0.09       0.00    -0.07
 68  26.2562      0.00     0.04       0.00     0.11
 69  26.2563      0.00     0.02       0.00    -0.04
 70  26.2563      0.00     0.09       0.00     0.02
 71  26.2563      0.00     0.09       0.00     0.02
 72  26.2672      0.00     0.25       0.00    -0.01
 73  26.2672      0.00     0.28       0.00     0.42
 74  26.2672      0.00     0.08       0.00     0.04
 75  26.2673      0.00     0.05       0.00     0.22
 76  26.2914      0.00     0.14       0.00     0.15
 77  26.3624      0.00     0.08       0.00     0.13
 78  26.3651      0.00    -0.02       0.00     0.12
 79  26.4365      0.00     0.06       0.00     0.04
 80  26.4365      0.00     0.03       0.00     0.04
 81  26.4365      0.00     0.05       0.00     0.03
 82  26.4366      0.00     0.09       0.00     0.06
 83  26.4441      0.00     0.08       0.00    -0.01
 84  26.4469      0.00     0.04       0.00     0.11
 85  26.4692      0.00     0.08       0.00     0.16
 86  26.4693      0.00    -0.07       0.00    -0.16
 87  26.4693      0.00     0.08       0.00    -0.00
 88  26.5677      0.00    -0.09       0.00    -0.11
 89  26.5677      0.00    -0.06       0.00    -0.11
 90  26.5678      0.00    -0.04       0.00    -0.08
 91  26.5678      0.00    -0.04       0.00     0.04
 92  27.1190      0.00    -0.09       0.00    -0.13
 93  27.1190      0.00    -0.14       0.00     0.07
 94  27.1190      0.00    -0.40       0.00    -0.47
 95  29.2488      0.00     0.33       0.00    -0.25
 96  29.2490      0.00     0.19       0.00     0.07
 97  29.2490      0.00     0.01       0.00    -0.19
 98  29.2760      0.00     0.20       0.00     0.12
 99  29.2761      0.00     0.14       0.00     0.14
100  29.2761      0.00    -0.11       0.00    -0.13

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.

309239    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        30.381    30.381    30.381
ecceobj         0.302     0.302     0.302
incobj         36.033    36.033    36.033
qmin           20.771    20.771    20.771
qmax           39.783    39.881    39.763
amean          30.130    30.122    30.130
amin           29.763    29.674    29.761
amax           30.743    30.730    30.737
emean           0.295     0.294     0.295
emin            0.284     0.282     0.284
emax            0.309     0.309     0.309
imean          36.028    36.084    36.029
imin           35.774    35.774    35.774
imax           36.323    36.423    36.329
excite_mean     0.658     0.658     0.658
fracstop        0.004     0.006     0.004
cjmean          2.559     2.558     2.559

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        84.2      82.5      84.2
kozaiamp          9.1      10.7       9.1