Orbit Fit and Astrometric record for 309741

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: 309741    
# Created Tue Oct 24 01:36:42 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting  102 observations of  102
# Arc:   4.30y
# First observation: 2008/10/22
#  Last observation: 2013/02/09
# Chi-squared of fit:   560.52 DOF:  198 RMS:  0.41
# Min/Max residuals:    -1.42    1.84
# Exact a, adot, b, bdot, g, gdot:
  2.844127E-05  1.832583E-01 -2.202888E-05 -1.283565E-01  9.668340E-02 -4.463003E-02
# 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
    8.481215   51.685656    0.378267    0.135911   -0.911243  2454761.745284
# Heliocentric elements and errors
Epoch:              2454762.5000  =  2008/10/23
Mean Anomaly:          353.44214 +/-     0.000
Argument of Peri:      199.64737 +/-     0.000
Long of Asc Node:      240.62925 +/-     0.000
Inclination:            35.85148 +/-     0.000
Eccentricity:         0.61191720 +/-    0.0000
Semi-Major Axis:     27.23285199 +/-    0.0000
Time of Perihelion: 2455708.0792 +/-       0.0
Perihelion:          10.56860144 +/-    0.0000
Aphelion:            43.89710254 +/-    0.0000
Period (y)              142.1176 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            7.21180015 +/-    0.0000
Ecliptic Y            8.51049613 +/-    0.0000
Ecliptic Z            1.52522615 +/-    0.0000
Ecliptic XDOT        -0.00450840 +/-    0.0000
Ecliptic YDOT         0.00265952 +/-    0.0000
Ecliptic ZDOT        -0.00378152 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   11.25907485 +/-    0.0000
Geocenter to KBO     10.34314121 +/-    0.0000
# Hcoef: 10.69

The following table shows the complete astrometric record for 309741. 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 (309741) followed by the observatory code and reference code for the source of the astrometry.

2008 10  22.24453  03 07 15.68   +26 21 35.2   20.9V 309741    691  C~00Sz      
2008 10  22.26220  03 07 15.39   +26 21 33.0   21.3V 309741    691  C~00Sz      
2008 10  22.27988  03 07 15.16   +26 21 31.2   21.1V 309741    691  C~00Sz      
2008 10  23.45766  03 06 57.98   +26 19 18.4   21.2V 309741    291  C~00Sz      
2008 10  23.47497  03 06 57.73   +26 19 16.4   21.2V 309741    291  C~00Sz      
2008 10  23.48885  03 06 57.53   +26 19 15.0   21.3V 309741    291  C~00Sz      
2008 10  24.45182  03 06 43.48   +26 17 25.1   20.3V 309741    291  C~00Sz      
2008 10  24.46612  03 06 43.20   +26 17 24.0         309741    291  C~00Sz      
2008 10  25.04253  03 06 34.65   +26 16 16.2         309741    J95  C~00Sz      
2008 10  25.18522  03 06 32.48   +26 16 00.5   20.5R 309741    J95  C~00Sz      
2008 10  25.281018 03 06 31.19   +26 15 49.1   21.1  309741    H55  C~00Sz      
2008 10  25.291846 03 06 31.01   +26 15 48.2   20.9  309741    H55  C~00Sz      
2008 10  25.302255 03 06 30.86   +26 15 47.0   20.9  309741    H55  C~00Sz      
2008 10  25.53653  03 06 27.30   +26 15 19.8   20.7R 309741    D35  C~00Sz      
2008 10  25.93125  03 06 21.47   +26 14 32.2   21.3R 309741    A99  C~00Sz      
2008 10  25.93587  03 06 21.41   +26 14 31.7   21.2R 309741    A99  C~00Sz      
2008 10  25.94712  03 06 21.24   +26 14 30.9   21.1R 309741    A99  C~00Sz      
2008 10  25.96045  03 06 21.05   +26 14 29.0   21.2R 309741    A99  C~00Sz      
2008 10  25.96353  03 06 21.00   +26 14 29.1   21.0R 309741    A99  C~00Sz      
2008 10  25.96489  03 06 20.94   +26 14 28.7   21.0R 309741    A99  C~00Sz      
2008 10  26.09546  03 06 19.00   +26 14 13.6   20.8R 309741    204  C~00tM      
2008 10  26.22439  03 06 17.12   +26 13 59.9         309741    291  C~00Sz      
2008 10  26.23947  03 06 16.89   +26 13 57.8         309741    291  C~00Sz      
2008 10  26.25480  03 06 16.53   +26 13 56.2         309741    291  C~00Sz      
2008 10  26.31643  03 06 15.71   +26 13 48.1   21.0R 309741    H01  C~00Sz      
2008 10  26.32014  03 06 15.66   +26 13 47.7   21.0R 309741    H01  C~00Sz      
2008 10  26.32748  03 06 15.55   +26 13 46.8   20.8R 309741    H01  C~00Sz      
2008 10  26.36852  03 06 14.92   +26 13 41.8   21.2R 309741    673  C~00Sz      
2008 10  26.38241  03 06 14.71   +26 13 40.2         309741    673  C~00Sz      
2008 10  26.39167  03 06 14.55   +26 13 39.2         309741    673  C~00Sz      
2008 10  26.39838  03 06 14.46   +26 13 38.3         309741    673  C~00Sz      
2008 10  27.19485  03 06 02.47   +26 12 04.1   21.8V 309741    291  C~00Sz      
2008 10  27.20260  03 06 02.35   +26 12 03.2   21.5V 309741    291  C~00Sz      
2008 10  27.21034  03 06 02.23   +26 12 02.1   21.5V 309741    291  C~00Sz      
2008 10  27.42706  03 05 58.93   +26 11 36.1   20.2R 309741    H01  C~00Sz      
2008 10  27.43088  03 05 58.88   +26 11 35.6   20.4R 309741    H01  C~00Sz      
2008 10  27.44009  03 05 58.73   +26 11 34.6   20.3R 309741    H01  C~00Sz      
2008 10  27.44623  03 05 58.62   +26 11 33.8   20.4R 309741    H01  C~00Sz      
2008 11  21.13226  02 59 31.16   +25 15 58.5         309741    291  C~01O0      
2008 11  21.14537  02 59 30.96   +25 15 56.7         309741    291  C~01O0      
2008 11  21.15857  02 59 30.78   +25 15 54.9         309741    291  C~01O0      
2008 11  24.32962  02 58 42.59   +25 08 07.5   21.1V 309741    291  C~01gp      
2008 11  24.33822  02 58 42.47   +25 08 06.1   21.7V 309741    291  C~01gp      
2008 12  27.76497  02 52 21.84   +23 46 46.9   20.5R 309741    461  C~03Jo      
2008 12  28.18943  02 52 18.99   +23 45 49.9   21.4R 309741    688  C~02hT      
2008 12  28.22032  02 52 18.78   +23 45 45.6         309741    688  C~02hT      
2008 12  29.83893  02 52 08.76   +23 42 09.5   21. R 309741    461  C~03Jo      
2008 12  30.14745  02 52 07.03   +23 41 29.1         309741    675  C~02hT      
2008 12  30.25820  02 52 06.37   +23 41 13.9         309741    675  C~02hT      
2009 08  10.42610  04 01 11.81   +22 47 26.0         309741    291  C~09yu      
2009 08  10.44241  04 01 12.08   +22 47 25.4   22.0V 309741    291  C~09yu      
2009 08  10.45854  04 01 12.21   +22 47 25.4         309741    291  C~09yu      
2009 10  14.45818  04 02 59.30   +21 38 47.9         309741    291  C~09yu      
2009 10  14.47600  04 02 59.14   +21 38 46.6         309741    291  C~09yu      
2009 10  14.49390  04 02 58.94   +21 38 44.9         309741    291  C~09yu      
2009 10  24.41494  04 01 05.47   +21 20 38.3         309741    691  C~0Abe      
2009 10  24.43213  04 01 05.27   +21 20 36.5         309741    691  C~0Abe      
2009 10  24.44930  04 01 05.02   +21 20 34.5         309741    691  C~0Abe      
2009 10  26.28924  04 00 41.27   +21 17 02.5         309741    291  C~0Abe      
2009 10  26.30168  04 00 41.03   +21 17 00.9         309741    291  C~0Abe      
2009 10  26.31203  04 00 40.87   +21 16 59.7         309741    291  C~0Abe      
2009 11  24.18361  03 53 15.59   +20 16 12.7   21.7V 309741    691  C~0BiG      
2009 11  24.20139  03 53 15.31   +20 16 10.2   21.4V 309741    691  C~0BiG      
2009 11  24.21918  03 53 14.98   +20 16 08.1   21.6V 309741    691  C~0BiG      
2009 12  11.21490  03 48 45.86   +19 39 03.8   20.8V 309741    G96  C~0C9G      
2009 12  11.22003  03 48 45.79   +19 39 03.2   21.1V 309741    G96  C~0C9G      
2009 12  11.22517  03 48 45.72   +19 39 02.8   21.1V 309741    G96  C~0C9G      
2009 12  11.23034  03 48 45.64   +19 39 01.8   21.5V 309741    G96  C~0C9G      
2010 09  17.44905  04 56 06.11   +16 19 06.5   21.9V 309741    291  C~0Mug      
2010 09  17.47316  04 56 06.22   +16 19 03.5         309741    291  C~0Mug      
2010 09  17.49749  04 56 06.34   +16 19 00.4         309741    291  C~0Mug      
2010 11  17.31725  04 49 12.32   +14 14 41.1   21.2V 309741    291  C~0PMi      
2010 11  17.33214  04 49 12.08   +14 14 39.3   21.3V 309741    291  C~0PMi      
2010 11  17.34601  04 49 11.86   +14 14 37.3   21.2V 309741    291  C~0PMi      
2010 12  04.30542  04 44 36.13   +13 40 27.9   20.5V 309741    G96  C~0Pn2      
2010 12  04.31233  04 44 36.02   +13 40 26.6   20.8V 309741    G96  C~0Pn2      
2010 12  04.32086  04 44 35.88   +13 40 25.7   20.4V 309741    G96  C~0Pn2      
2010 12  04.32784  04 44 35.73   +13 40 24.6   20.3V 309741    G96  C~0Pn2      
2011 01  07.23151  04 36 07.40   +12 46 45.3         309741    291  C~0QtZ      
2011 01  07.25405  04 36 07.06   +12 46 44.2         309741    291  C~0QtZ      
2011 01  07.26452  04 36 06.93   +12 46 43.3         309741    291  C~0QtZ      
2011 09  09.47201  05 42 40.11   +10 00 49.3         309741    291  C~0Xyk      
2011 09  09.48282  05 42 40.25   +10 00 47.9         309741    291  C~0Xyk      
2011 11  29.45801  05 37 55.04   +06 45 32.2         309741    291  C~0b3a      
2011 11  29.46652  05 37 54.85   +06 45 31.3         309741    291  C~0b3a      
2012 12  19.12505  06 21 25.21   -00 58 45.8   20.8R 309741    304  C~0svd      
2012 12  19.17486  06 21 24.38   -00 58 49.6         309741    304  C~0svd      
2012 12  19.31002  06 21 22.15   -00 58 59.7         309741    304  C~0svd      
2012 12  20.13619  06 21 08.77   -01 00 00.9         309741    304  C~0svd      
2012 12  20.20742  06 21 07.60   -01 00 06.0         309741    304  C~0svd      
2012 12  20.31506  06 21 05.82   -01 00 14.1         309741    304  C~0svd      
2013 02  05.05736  06 09 58.81   -01 11 02.8   21.1R 309741    304  C~0svd      
2013 02  05.12507  06 09 58.15   -01 11 00.2         309741    304  C~0svd      
2013 02  05.20279  06 09 57.40   -01 10 57.2         309741    304  C~0svd      
2013 02  06.05411  06 09 49.54   -01 10 24.5         309741    304  C~0svd      
2013 02  06.10169  06 09 49.08   -01 10 22.6         309741    304  C~0svd      
2013 02  06.19946  06 09 48.17   -01 10 18.8         309741    304  C~0svd      
2013 02  07.06142  06 09 40.48   -01 09 44.3         309741    304  C~0svd      
2013 02  07.10809  06 09 40.05   -01 09 42.3         309741    304  C~0svd      
2013 02  09.04072  06 09 23.60   -01 08 20.4         309741    304  C~0svd      
2013 02  09.13912  06 09 22.77   -01 08 16.0         309741    304  C~0svd      
2013 02  09.14769  06 09 22.70   -01 08 15.6         309741    304  C~0svd      

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    -0.35       0.00     1.84
  2   0.0000      0.00    -0.02       0.00     0.12
  3   0.0001      0.00     0.43       0.00     0.27
  4   0.0033      0.00    -0.02       0.00    -0.16
  5   0.0034      0.00     0.08       0.00    -0.17
  6   0.0034      0.00     0.17       0.00     0.02
  7   0.0060      0.00     1.36       0.00     0.02
  8   0.0061      0.00     0.38       0.00     0.58
  9   0.0077      0.00    -0.48       0.00    -0.49
 10   0.0081      0.00    -0.79       0.00     0.46
 11   0.0083      0.00     0.75       0.00    -0.07
 12   0.0083      0.00     0.51       0.00     0.29
 13   0.0084      0.00     0.63       0.00     0.31
 14   0.0090      0.00    -1.29       0.00     0.33
 15   0.0101      0.00     0.12       0.00    -0.90
 16   0.0101      0.00     0.27       0.00    -0.86
 17   0.0101      0.00     0.29       0.00    -0.35
 18   0.0102      0.00     0.48       0.00    -0.69
 19   0.0102      0.00     0.44       0.00    -0.23
 20   0.0102      0.00    -0.15       0.00    -0.47
 21   0.0105      0.00     0.57       0.00    -0.20
 22   0.0109      0.00     0.47       0.00     1.12
 23   0.0109      0.00     0.47       0.00     0.77
 24   0.0110      0.00    -1.42       0.00     0.96
 25   0.0111      0.00     0.51       0.00     0.11
 26   0.0112      0.00     0.61       0.00     0.15
 27   0.0112      0.00     0.65       0.00     0.11
 28   0.0113      0.00     0.50       0.00    -0.04
 29   0.0113      0.00     0.55       0.00     0.00
 30   0.0114      0.00     0.28       0.00     0.10
 31   0.0114      0.00     0.47       0.00    -0.00
 32   0.0136      0.00    -0.19       0.00     0.40
 33   0.0136      0.00    -0.20       0.00     0.41
 34   0.0136      0.00    -0.22       0.00     0.22
 35   0.0142      0.00     0.52       0.00     0.11
 36   0.0142      0.00     0.66       0.00     0.07
 37   0.0142      0.00     0.53       0.00     0.18
 38   0.0142      0.00     0.30       0.00     0.13
 39   0.0818      0.00    -0.31       0.00     0.32
 40   0.0819      0.00    -0.25       0.00     0.42
 41   0.0819      0.00     0.14       0.00     0.54
 42   0.0906      0.00    -0.28       0.00     0.63
 43   0.0906      0.00    -0.11       0.00     0.52
 44   0.1821      0.00     0.77       0.00     0.06
 45   0.1833      0.00    -0.04       0.00     0.09
 46   0.1834      0.00    -0.05       0.00    -0.04
 47   0.1878      0.00    -0.34       0.00     0.18
 48   0.1886      0.00     0.47       0.00     0.42
 49   0.1889      0.00     0.67       0.00    -0.11
 50   0.7999      0.00    -0.76       0.00     0.10
 51   0.8000      0.00     0.04       0.00    -0.14
 52   0.8000      0.00    -1.21       0.00     0.22
 53   0.9780      0.00    -0.33       0.00    -0.15
 54   0.9780      0.00     0.03       0.00     0.41
 55   0.9781      0.00    -0.21       0.00     0.59
 56   1.0053      0.00    -0.17       0.00    -0.36
 57   1.0053      0.00     0.21       0.00    -0.18
 58   1.0054      0.00    -0.17       0.00    -0.20
 59   1.0104      0.00     1.18       0.00     0.31
 60   1.0104      0.00     0.10       0.00     0.15
 61   1.0105      0.00    -0.21       0.00     0.14
 62   1.0895      0.00    -0.00       0.00    -0.01
 63   1.0895      0.00     0.25       0.00    -0.18
 64   1.0896      0.00    -0.23       0.00     0.05
 65   1.1361      0.00     0.08       0.00    -0.24
 66   1.1361      0.00     0.19       0.00    -0.19
 67   1.1362      0.00     0.31       0.00     0.07
 68   1.1362      0.00     0.28       0.00    -0.27
 69   1.9034      0.00    -0.15       0.00     0.16
 70   1.9034      0.00     0.14       0.00    -0.29
 71   1.9035      0.00     0.57       0.00    -0.81
 72   2.0700      0.00     0.13       0.00     0.24
 73   2.0701      0.00     0.04       0.00     0.31
 74   2.0701      0.00     0.00       0.00     0.05
 75   2.1165      0.00     0.23       0.00     0.41
 76   2.1165      0.00     0.34       0.00    -0.10
 77   2.1166      0.00     0.43       0.00    -0.02
 78   2.1166      0.00    -0.04       0.00    -0.32
 79   2.2094      0.00     0.95       0.00    -0.21
 80   2.2095      0.00    -0.10       0.00     0.32
 81   2.2095      0.00    -0.17       0.00     0.18
 82   2.8808      0.00     0.56       0.00     0.41
 83   2.8809      0.00     0.93       0.00     0.51
 84   3.1026      0.00     0.17       0.00     0.33
 85   3.1026      0.00    -0.67       0.00     0.43
 86   4.1585      0.00     0.33       0.00    -0.00
 87   4.1586      0.00     0.21       0.00    -0.03
 88   4.1590      0.00     0.27       0.00     0.06
 89   4.1612      0.00     0.05       0.00     0.14
 90   4.1614      0.00     0.21       0.00     0.24
 91   4.1617      0.00     0.27       0.00    -0.03
 92   4.2897      0.00    -0.02       0.00    -0.10
 93   4.2899      0.00     0.00       0.00    -0.04
 94   4.2901      0.00     0.05       0.00     0.03
 95   4.2924      0.00     0.09       0.00    -0.01
 96   4.2926      0.00    -0.06       0.00     0.03
 97   4.2928      0.00     0.08       0.00    -0.02
 98   4.2952      0.00     0.18       0.00    -0.10
 99   4.2953      0.00     0.13       0.00    -0.01
100   4.3006      0.00    -0.02       0.00    -0.13
101   4.3009      0.00     0.07       0.00    -0.07
102   4.3009      0.00     0.11       0.00    -0.04

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.

309741    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        27.490    27.490    27.491
ecceobj         0.614     0.614     0.614
incobj         35.807    35.807    35.807
qmin            9.854    10.140    10.539
qmax           47.023    53.307    44.734
amean          27.516    29.608    27.080
amin           26.381    27.037    26.352
amax           28.499    31.865    27.732
emean           0.623     0.647     0.605
emin            0.596     0.606     0.591
emax            0.651     0.675     0.616
imean          36.056    35.847    37.303
imin           34.262    34.627    36.846
imax           37.047    37.030    37.745
excite_mean     0.857     0.873     0.857
fracstop        0.013     0.025     0.008
cjmean          2.311     2.251     2.321

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       227.6     236.7     213.0
kozaiamp         27.7      32.2      13.7