Orbit Fit and Astrometric record for 308460

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: 308460    
# Created Tue Oct 24 01:36:41 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   68 observations of   68
# Arc:   5.19y
# First observation: 2005/09/22
#  Last observation: 2010/12/02
# Chi-squared of fit:    67.03 DOF:  130 RMS:  0.18
# Min/Max residuals:    -0.49    0.51
# Exact a, adot, b, bdot, g, gdot:
  1.735104E-05  3.264940E-02 -6.101720E-07  7.696468E-04  3.014717E-02 -2.041657E-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
   -0.713029    0.434568    0.018592   -0.012442   -1.007515  2453635.778083
# Heliocentric elements and errors
Epoch:              2453636.5000  =  2005/09/23
Mean Anomaly:          287.30619 +/-     0.000
Argument of Peri:       52.82640 +/-     0.000
Long of Asc Node:       27.45037 +/-     0.000
Inclination:             1.52165 +/-     0.000
Eccentricity:         0.06428164 +/-    0.0000
Semi-Major Axis:     34.70328226 +/-    0.0000
Time of Perihelion: 2468714.6884 +/-       0.0
Perihelion:          32.47249839 +/-    0.0000
Aphelion:            36.93406613 +/-    0.0000
Period (y)              204.4391 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           34.17067568 +/-    0.0000
Ecliptic Y            0.23963615 +/-    0.0000
Ecliptic Z           -0.41278775 +/-    0.0000
Ecliptic XDOT        -0.00020506 +/-    0.0000
Ecliptic YDOT         0.00295699 +/-    0.0000
Ecliptic ZDOT         0.00007222 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.17404440 +/-    0.0000
Geocenter to KBO     33.17068166 +/-    0.0000
# Hcoef:  7.36

The following table shows the complete astrometric record for 308460. 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 (308460) followed by the observatory code and reference code for the source of the astrometry.

2005 09  22.27734  00 02 43.76   -00 28 52.8   22.6V 308460    705  cr7075      
2005 09  22.28066  00 02 43.76   -00 28 52.8   23.6  308460    705  cr7075      
2005 09  26.31570  00 02 21.94   -00 31 12.6   23.0V 308460    705  cr7075      
2005 09  26.31902  00 02 21.94   -00 31 12.6   24.3  308460    705  cr7075      
2005 10  21.27150  00 00 14.11   -00 44 42.0   24.0  308460    705  Cv1544      
2005 10  21.27233  00 00 14.11   -00 44 42.0   22.8V 308460    705  Cv1544      
2005 10  23.23464  00 00 05.14   -00 45 38.1   22.5V 308460    705  cr7075      
2005 10  23.23796  00 00 05.14   -00 45 38.1   23.1  308460    705  cr7075      
2005 10  26.23012  23 59 51.86   -00 47 00.8   22.8V 308460    705  cr7075      
2005 10  26.23344  23 59 51.85   -00 47 00.8   23.7  308460    705  cr7075      
2005 10  31.21412  23 59 31.05   -00 49 09.6   22.8V 308460    705  cr7075      
2005 10  31.21744  23 59 31.06   -00 49 09.6   23.8  308460    705  cr7075      
2005 11  02.30350  23 59 22.86   -00 50 00.1   22.8V 308460    705  cr7075      
2005 11  02.30683  23 59 22.86   -00 50 00.1   24.0  308460    705  cr7075      
2005 11  03.23654  23 59 19.29   -00 50 21.7   23.0V 308460    705  cr7075      
2005 11  03.23987  23 59 19.29   -00 50 21.7   24.2  308460    705  cr7075      
2005 11  06.22308  23 59 08.38   -00 51 28.4   22.8V 308460    705  cr7075      
2005 11  06.22640  23 59 08.38   -00 51 28.4   23.8  308460    705  cr7075      
2006 08  28.30304  00 11 40.43   +00 32 06.1   22.3V 308460    705  cs2985      
2006 08  28.30636  00 11 40.46   +00 32 05.9   23.1  308460    705  cs2985      
2006 09  29.33666  00 08 54.58   +00 14 16.3   22.6V 308460    705  cs4095      
2006 09  29.33749  00 08 54.59   +00 14 16.2   23.8  308460    705  cs4095      
2006 10  01.26032  00 08 44.22   +00 13 09.9   22.5V 308460    705  cs2985      
2006 10  01.26364  00 08 44.18   +00 13 10.1   23.5  308460    705  cs2985      
2006 10  02.26179  00 08 38.82   +00 12 35.5   22.9V 308460    705  cs2985      
2006 10  02.26262  00 08 38.82   +00 12 35.5   24.1  308460    705  cs2985      
2006 10  04.25451  00 08 28.14   +00 11 27.5   22.2V 308460    705  cs2985      
2006 10  04.25534  00 08 28.13   +00 11 27.5   22.6  308460    705  cs2985      
2006 10  19.24332  00 07 11.16   +00 03 20.5   21.6R 308460    695  Ct0514      
2006 10  19.33782  00 07 10.70   +00 03 17.5         308460    695  Ct0514      
2006 10  20.24992  00 07 06.28   +00 02 49.9   23.1V 308460    705  cs4095      
2006 10  20.25075  00 07 06.27   +00 02 49.7   24.5  308460    705  cs4095      
2006 10  20.30089  00 07 06.04   +00 02 47.8         308460    695  Ct0514      
2006 10  22.25299  00 06 56.74   +00 01 50.1   22.7V 308460    705  cs4095      
2006 10  22.25382  00 06 56.74   +00 01 50.0   23.5  308460    705  cs4095      
2006 11  09.23651  00 05 42.52   -00 05 49.5   22.3V 308460    705  ct2253      
2006 11  09.23734  00 05 42.51   -00 05 49.5   22.8  308460    705  ct2253      
2006 11  16.23653  00 05 20.37   -00 08 02.9   22.6V 308460    705  ct2253      
2006 11  16.23985  00 05 20.36   -00 08 03.1   23.4  308460    705  ct2253      
2006 11  19.23490  00 05 12.23   -00 08 50.8   22.6V 308460    705  ct2253      
2006 11  19.23822  00 05 12.23   -00 08 51.3   23.5  308460    705  ct2253      
2006 11  21.25667  00 05 07.24   -00 09 20.4   23.1V 308460    705  ct2253      
2006 11  21.25750  00 05 07.24   -00 09 20.4   24.4  308460    705  ct2253      
2007 09  05.32787  00 17 52.22   +01 15 15.7   22.5V 308460    705  Cz2937      
2007 09  05.33119  00 17 52.20   +01 15 15.9   23.1  308460    705  Cz2937      
2007 09  22.31574  00 16 23.75   +01 05 46.2   22.6V 308460    705  Cz2937      
2007 09  22.31657  00 16 23.75   +01 05 46.1   23.8  308460    705  Cz2937      
2007 10  12.33176  00 14 36.12   +00 54 20.4   22.8V 308460    705  Cz2937      
2007 10  12.33259  00 14 36.11   +00 54 20.4   24.2  308460    705  Cz2938      
2007 10  14.33214  00 14 25.74   +00 53 14.8   22.8V 308460    705  Cz2938      
2007 10  14.33297  00 14 25.73   +00 53 14.9   24.2  308460    705  Cz2938      
2007 10  20.31604  00 13 55.59   +00 50 04.9   22.7V 308460    705  Cz2938      
2007 10  20.31936  00 13 55.57   +00 50 04.6   24.1  308460    705  Cz2938      
2007 11  01.29885  00 13 00.57   +00 44 21.3   23.0V 308460    705  Cz2938      
2007 11  01.29968  00 13 00.56   +00 44 21.2   24.3  308460    705  Cz2938      
2007 11  02.23711  00 12 56.63   +00 43 56.7   22.5V 308460    705  Cz2938      
2007 11  02.24043  00 12 56.61   +00 43 56.6   23.5  308460    705  Cz2938      
2007 11  05.24181  00 12 44.43   +00 42 41.3   22.5V 308460    705  Cz2938      
2007 11  05.24513  00 12 44.40   +00 42 41.3   23.6  308460    705  Cz2938      
2007 11  12.23549  00 12 18.68   +00 40 03.7   22.5V 308460    705  Cz2938      
2007 11  12.23881  00 12 18.66   +00 40 03.5   23.4  308460    705  Cz2938      
2008 10  03.235800 00 22 12.42   +01 46 30.0   21.9V 308460    645  C~1SJS      
2008 10  03.236629 00 22 12.41   +01 46 30.0   21.6V 308460    645  C~1SJS      
2008 10  03.239117 00 22 12.40   +01 46 29.9   23.1V 308460    645  C~1SJS      
2010 12  01.16450  00 31 51.78   +02 55 53.1   21.8R 308460    688  C~0Pj8      
2010 12  01.24358  00 31 51.59   +02 55 52.0         308460    688  C~0Pj8      
2010 12  02.09602  00 31 49.83   +02 55 41.6         308460    688  C~0Pj8      
2010 12  02.19198  00 31 49.64   +02 55 41.0         308460    688  C~0Pj8      

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    -0.49
  2   0.0000      0.00     0.21       0.00     0.31
  3   0.0111      0.00     0.12       0.00     0.24
  4   0.0111      0.00     0.39       0.00     0.35
  5   0.0794      0.00    -0.27       0.00     0.06
  6   0.0794      0.00    -0.21       0.00     0.08
  7   0.0848      0.00    -0.03       0.00     0.07
  8   0.0848      0.00     0.20       0.00     0.17
  9   0.0930      0.00    -0.03       0.00     0.01
 10   0.0930      0.00     0.04       0.00     0.10
 11   0.1066      0.00    -0.08       0.00    -0.06
 12   0.1066      0.00     0.27       0.00     0.02
 13   0.1123      0.00     0.17       0.00    -0.14
 14   0.1123      0.00     0.37       0.00    -0.06
 15   0.1149      0.00    -0.12       0.00     0.06
 16   0.1149      0.00     0.07       0.00     0.14
 17   0.1231      0.00     0.02       0.00     0.03
 18   0.1231      0.00     0.20       0.00     0.10
 19   0.9309      0.00    -0.22       0.00    -0.18
 20   0.9309      0.00     0.46       0.00    -0.28
 21   1.0186      0.00    -0.16       0.00     0.15
 22   1.0186      0.00     0.05       0.00     0.08
 23   1.0239      0.00     0.09       0.00     0.02
 24   1.0239      0.00    -0.24       0.00     0.34
 25   1.0267      0.00    -0.07       0.00    -0.02
 26   1.0267      0.00    -0.00       0.00     0.01
 27   1.0321      0.00    -0.08       0.00    -0.00
 28   1.0321      0.00    -0.16       0.00     0.03
 29   1.0731      0.00     0.20       0.00     0.16
 30   1.0734      0.00     0.31       0.00     0.04
 31   1.0759      0.00     0.01       0.00     0.12
 32   1.0759      0.00    -0.08       0.00    -0.06
 33   1.0760      0.00     0.13       0.00    -0.45
 34   1.0814      0.00    -0.14       0.00     0.08
 35   1.0814      0.00    -0.08       0.00     0.00
 36   1.1306      0.00     0.05       0.00    -0.11
 37   1.1306      0.00    -0.05       0.00    -0.10
 38   1.1498      0.00     0.02       0.00     0.04
 39   1.1498      0.00     0.02       0.00    -0.10
 40   1.1580      0.00    -0.13       0.00     0.33
 41   1.1580      0.00    -0.00       0.00    -0.12
 42   1.1635      0.00    -0.02       0.00    -0.00
 43   1.1635      0.00     0.01       0.00     0.01
 44   1.9522      0.00    -0.05       0.00    -0.24
 45   1.9522      0.00    -0.10       0.00     0.07
 46   1.9987      0.00     0.06       0.00     0.07
 47   1.9987      0.00     0.12       0.00     0.00
 48   2.0535      0.00     0.17       0.00    -0.08
 49   2.0535      0.00     0.08       0.00    -0.05
 50   2.0590      0.00     0.11       0.00    -0.08
 51   2.0590      0.00     0.02       0.00     0.05
 52   2.0754      0.00     0.14       0.00     0.01
 53   2.0754      0.00     0.08       0.00    -0.18
 54   2.1082      0.00     0.27       0.00     0.14
 55   2.1082      0.00     0.18       0.00     0.06
 56   2.1108      0.00     0.21       0.00    -0.04
 57   2.1108      0.00     0.12       0.00    -0.05
 58   2.1190      0.00     0.28       0.00    -0.02
 59   2.1190      0.00     0.03       0.00     0.06
 60   2.1381      0.00     0.12       0.00     0.06
 61   2.1382      0.00    -0.01       0.00    -0.08
 62   3.0307      0.00     0.45       0.00    -0.26
 63   3.0307      0.00     0.37       0.00    -0.24
 64   3.0307      0.00     0.43       0.00    -0.25
 65   5.1907      0.00    -0.05       0.00     0.26
 66   5.1909      0.00    -0.27       0.00     0.14
 67   5.1932      0.00    -0.24       0.00    -0.01
 68   5.1935      0.00    -0.04       0.00     0.51

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.

308460    quality flag:3

Type:           5:4E      5:4E      5:4E

axisobj        35.054    35.054    35.054
ecceobj         0.069     0.069     0.069
incobj          1.516     1.516     1.516
qmin           31.949    31.961    31.941
qmax           38.282    38.284    38.281
amean          34.948    34.948    34.948
amin           34.582    34.584    34.580
amax           35.327    35.326    35.329
emean           0.063     0.063     0.063
emin            0.040     0.040     0.040
emax            0.085     0.085     0.085
imean           2.825     2.825     2.826
imin            1.740     1.740     1.739
imax            3.748     3.747     3.748
excite_mean     0.081     0.081     0.081
fracstop        1.000     1.000     1.000
cjmean          3.010     3.010     3.010

libcent 0       178.2     178.2     178.4
libamp  0        96.1      96.4      96.2
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       181.2     181.1     181.2
kozaiamp        180.0     180.0     180.0