Orbit Fit and Astrometric record for 308634

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: 308634    
# Created Sun Oct 22 01:36:42 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   68 observations of   68
# Arc:  10.17y
# First observation: 2005/02/10
#  Last observation: 2015/04/15
# Chi-squared of fit:    94.57 DOF:  130 RMS:  0.21
# Min/Max residuals:    -0.42    0.57
# Exact a, adot, b, bdot, g, gdot:
  1.526365E-05  2.408378E-02 -3.567340E-06 -3.310888E-03  2.457624E-02  2.261149E-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
    0.763311  132.830476   -0.146993    0.013069   -0.972403  2453411.798283
# Heliocentric elements and errors
Epoch:              2453412.5000  =  2005/02/11
Mean Anomaly:           59.01718 +/-     0.000
Argument of Peri:      104.60309 +/-     0.000
Long of Asc Node:      318.45191 +/-     0.000
Inclination:             7.84926 +/-     0.000
Eccentricity:         0.10432521 +/-    0.0000
Semi-Major Axis:     43.63173119 +/-    0.0000
Time of Perihelion: 2436154.9945 +/-       0.0
Perihelion:          39.07984186 +/-    0.0000
Aphelion:            48.18362051 +/-    0.0000
Period (y)              288.2119 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -28.43339231 +/-    0.0000
Ecliptic Y           30.45074957 +/-    0.0000
Ecliptic Z            0.54191141 +/-    0.0000
Ecliptic XDOT        -0.00214237 +/-    0.0000
Ecliptic YDOT        -0.00164285 +/-    0.0000
Ecliptic ZDOT        -0.00036539 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.66526859 +/-    0.0000
Geocenter to KBO     40.68968747 +/-    0.0000
# Hcoef:  6.28

The following table shows the complete astrometric record for 308634. 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 (308634) followed by the observatory code and reference code for the source of the astrometry.

2005 02  10.29754  09 02 05.31   +17 41 34.2   23.1g 308634    568  C~0VEC      
2005 02  10.38053  09 02 04.88   +17 41 35.8   22.9g 308634    568  C~0VEC      
2005 02  10.41998  09 02 04.68   +17 41 36.5   22.9g 308634    568  C~0VEC      
2005 02  15.31900  09 01 40.47   +17 43 08.0   22.7g 308634    568  C~0VEC      
2005 04  11.28432  08 58 33.84   +17 53 43.3   22.7i 308634    568  C~0VEC      
2005 04  11.31026  08 58 33.80   +17 53 43.3   22.6i 308634    568  C~0VEC      
2005 04  11.33986  08 58 33.76   +17 53 43.7   22.8i 308634    568  C~0VEC      
2005 12  01.37590  09 12 01.80   +16 48 20.6   21.8R 308634    695  Cp9927      
2005 12  01.43742  09 12 01.71   +16 48 21.0         308634    695  Cp9927      
2005 12  02.37772  09 12 00.27   +16 48 26.7         308634    695  Cp9927      
2006 02  03.45924  09 07 59.27   +17 04 35.2   22.6r 308634    568  C~0D3r      
2006 02  06.30923  09 07 44.97   +17 05 32.8   22.5r 308634    568  C74770      
2006 02  06.34889  09 07 44.77   +17 05 33.7         308634    568  C74770      
2006 02  06.38919  09 07 44.57   +17 05 34.5         308634    568  C74770      
2006 03  02.21268  09 05 50.77   +17 12 55.3   21.7R 308634    695  Cr3595      
2006 03  02.26884  09 05 50.51   +17 12 56.5         308634    695  Cr3595      
2006 03  02.32534  09 05 50.25   +17 12 57.5         308634    695  Cr3595      
2006 04  26.00069  09 03 38.75   +17 20 00.5   21.1R 308634    807  Cr3595      
2006 04  27.00021  09 03 38.77   +17 19 57.5         308634    807  Cr3595      
2006 04  28.00246  09 03 38.92   +17 19 54.3         308634    807  Cr3595      
2006 11  23.48463  09 17 18.44   +16 13 02.3         308634    695  C~0VEC      
2006 11  24.48498  09 17 17.78   +16 13 04.1         308634    695  C~0VEC      
2006 12  21.36750  09 16 25.34   +16 16 25.7   22.1R 308634    695  Cu3131      
2006 12  21.50728  09 16 24.90   +16 16 27.4         308634    695  Cu3131      
2007 02  14.44935  09 12 20.44   +16 33 11.2   22.3r 308634    568  C~0VEC      
2007 02  14.48689  09 12 20.25   +16 33 11.9   22.3r 308634    568  C~0VEC      
2007 02  14.52049  09 12 20.08   +16 33 12.5   22.7r 308634    568  C~0VEC      
2007 02  15.46373  09 12 15.47   +16 33 31.3   22.5r 308634    568  C~0VEC      
2007 02  21.31401  09 11 47.25   +16 35 24.7   22.0R 308634    695  Cu3131      
2007 02  21.43795  09 11 46.63   +16 35 27.2         308634    695  Cu3131      
2008 12  04.47659  09 27 11.52   +15 03 17.3   21.7R 308634    H01  C~01xc      
2008 12  04.51020  09 27 11.47   +15 03 17.4   21.5R 308634    H01  C~01xc      
2009 01  17.27943  09 24 52.18   +15 12 55.3   23.0R 308634    250  S~06Ay      
2009 01  17.28568  09 24 52.15   +15 12 55.4         308634    250  S~06Ay      
2009 01  17.29262  09 24 52.12   +15 12 55.6         308634    250  S~06Ay      
2009 01  17.34262  09 24 51.89   +15 12 56.5         308634    250  S~06Ay      
2011 01  30.34987  09 33 57.212  +14 05 14.15  22.2w 308634    F51  C~1vxF      
2011 01  30.36443  09 33 57.156  +14 05 14.59  22.4w 308634    F51  C~1vxF      
2011 01  30.38005  09 33 57.077  +14 05 14.84  22.4w 308634    F51  C~1vxF      
2011 01  30.39460  09 33 57.021  +14 05 15.01  22.5w 308634    F51  C~1vxF      
2011 02  03.37330  09 33 37.982  +14 06 40.43  22.6w 308634    F51  C~1vxF      
2011 02  03.38872  09 33 37.878  +14 06 40.91  22.3w 308634    F51  C~1vxF      
2011 02  03.48659  09 33 37.413  +14 06 42.96  22.3w 308634    F51  C~1vxF      
2011 02  03.50202  09 33 37.349  +14 06 43.37  22.5w 308634    F51  C~1vxF      
2012 02  14.36529  09 37 44.415  +13 34 19.54  22.6w 308634    F51  C~1vxF      
2012 02  14.37947  09 37 44.328  +13 34 19.65  22.3w 308634    F51  C~1vxF      
2012 02  14.39368  09 37 44.262  +13 34 20.02  22.6w 308634    F51  C~1vxF      
2014 01  25.39836  09 49 04.397  +12 14 02.57  22.4w 308634    F51  C~1vxF      
2014 01  25.42139  09 49 04.278  +12 14 02.82  22.6w 308634    F51  C~1vxF      
2014 01  25.43290  09 49 04.236  +12 14 03.28  22.6w 308634    F51  C~1vxF      
2015 01  20.54761  09 54 16.044  +11 35 28.58  22.5w 308634    F51  C~1vxF      
2015 01  20.56016  09 54 16.000  +11 35 28.94  22.8w 308634    F51  C~1vxF      
2015 01  20.57276  09 54 15.941  +11 35 29.20  22.4w 308634    F51  C~1vxF      
2015 01  20.58553  09 54 15.889  +11 35 29.31  22.5w 308634    F51  C~1vxF      
2015 01  22.55800  09 54 07.607  +11 36 07.98  22.7w 308634    F51  C~1vxF      
2015 01  22.55942  09 54 07.591  +11 36 08.18  22.4w 308634    F51  C~1vxF      
2015 01  22.57030  09 54 07.556  +11 36 08.29  22.6w 308634    F51  C~1vxF      
2015 01  22.57172  09 54 07.542  +11 36 08.30  22.6w 308634    F51  C~1vxF      
2015 01  22.58259  09 54 07.500  +11 36 08.63  22.2w 308634    F51  C~1vxF      
2015 01  22.58400  09 54 07.493  +11 36 08.47  22.4w 308634    F51  C~1vxF      
2015 01  22.59489  09 54 07.446  +11 36 08.83  22.6w 308634    F51  C~1vxF      
2015 01  22.59632  09 54 07.434  +11 36 08.84  22.6w 308634    F51  C~1vxF      
2015 03  19.41241  09 49 56.867  +11 56 27.97  22.2w 308634    F51  C~1vxF      
2015 03  19.42441  09 49 56.817  +11 56 28.21  22.4w 308634    F51  C~1vxF      
2015 03  19.43642  09 49 56.761  +11 56 28.41  22.1w 308634    F51  C~1vxF      
2015 04  15.15544  09 48 37.06   +12 03 06.7   22.4R 308634    695  C~1RcC      
2015 04  15.22424  09 48 36.91   +12 03 07.4         308634    695  C~1RcC      
2015 04  15.30112  09 48 36.76   +12 03 08.1         308634    695  C~1RcC      

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    -0.08       0.00     0.41
  2   0.0002      0.00     0.06       0.00     0.26
  3   0.0003      0.00     0.07       0.00     0.21
  4   0.0137      0.00     0.35       0.00    -0.04
  5   0.1642      0.00     0.46       0.00     0.29
  6   0.1643      0.00     0.38       0.00     0.23
  7   0.1644      0.00     0.38       0.00     0.57
  8   0.8051      0.00    -0.31       0.00    -0.35
  9   0.8053      0.00    -0.19       0.00    -0.31
 10   0.8079      0.00     0.33       0.00    -0.17
 11   0.9806      0.00    -0.41       0.00    -0.42
 12   0.9884      0.00    -0.38       0.00     0.43
 13   0.9885      0.00    -0.36       0.00     0.53
 14   0.9886      0.00    -0.27       0.00     0.52
 15   1.0538      0.00     0.13       0.00    -0.21
 16   1.0540      0.00    -0.03       0.00     0.06
 17   1.0541      0.00    -0.17       0.00     0.13
 18   1.2038      0.00     0.18       0.00    -0.06
 19   1.2066      0.00    -0.03       0.00    -0.21
 20   1.2093      0.00     0.27       0.00    -0.15
 21   1.7829      0.00     0.10       0.00     0.02
 22   1.7856      0.00     0.19       0.00     0.07
 23   1.8592      0.00     0.07       0.00    -0.26
 24   1.8596      0.00     0.14       0.00    -0.33
 25   2.0100      0.00    -0.05       0.00    -0.20
 26   2.0101      0.00    -0.08       0.00    -0.24
 27   2.0102      0.00    -0.12       0.00    -0.30
 28   2.0128      0.00     0.03       0.00    -0.18
 29   2.0288      0.00     0.23       0.00    -0.18
 30   2.0291      0.00    -0.13       0.00    -0.01
 31   3.8143      0.00    -0.00       0.00     0.13
 32   3.8144      0.00     0.02       0.00     0.05
 33   3.9342      0.00     0.10       0.00    -0.05
 34   3.9343      0.00     0.07       0.00    -0.07
 35   3.9343      0.00     0.09       0.00    -0.01
 36   3.9344      0.00     0.02       0.00    -0.08
 37   5.9687      0.00    -0.15       0.00    -0.21
 38   5.9687      0.00     0.06       0.00    -0.08
 39   5.9687      0.00     0.00       0.00    -0.17
 40   5.9688      0.00     0.22       0.00    -0.31
 41   5.9797      0.00     0.26       0.00    -0.28
 42   5.9797      0.00    -0.17       0.00    -0.13
 43   5.9800      0.00     0.05       0.00    -0.20
 44   5.9800      0.00     0.23       0.00    -0.12
 45   7.0091      0.00     0.26       0.00    -0.02
 46   7.0091      0.00    -0.00       0.00    -0.22
 47   7.0092      0.00     0.05       0.00    -0.17
 48   8.9558      0.00    -0.09       0.00     0.12
 49   8.9558      0.00    -0.32       0.00    -0.11
 50   8.9559      0.00    -0.17       0.00     0.11
 51   9.9418      0.00     0.19       0.00     0.01
 52   9.9419      0.00     0.32       0.00     0.13
 53   9.9419      0.00     0.24       0.00     0.15
 54   9.9419      0.00     0.27       0.00     0.01
 55   9.9473      0.00     0.20       0.00     0.01
 56   9.9473      0.00     0.05       0.00     0.18
 57   9.9474      0.00     0.23       0.00     0.07
 58   9.9474      0.00     0.11       0.00     0.05
 59   9.9474      0.00     0.18       0.00     0.17
 60   9.9474      0.00     0.17       0.00    -0.02
 61   9.9474      0.00     0.17       0.00     0.13
 62   9.9474      0.00     0.08       0.00     0.11
 63  10.1002      0.00    -0.13       0.00    -0.02
 64  10.1003      0.00    -0.18       0.00    -0.01
 65  10.1003      0.00    -0.31       0.00    -0.04
 66  10.1735      0.00    -0.00       0.00     0.01
 67  10.1737      0.00    -0.11       0.00     0.02
 68  10.1739      0.00     0.01       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.

308634    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.497    43.497    43.497
ecceobj         0.108     0.108     0.108
incobj          7.869     7.869     7.869
qmin           37.971    37.975    37.962
qmax           49.247    49.273    49.225
amean          43.474    43.474    43.474
amin           43.117    43.116    43.113
amax           43.842    43.854    43.852
emean           0.105     0.105     0.105
emin            0.086     0.087     0.086
emax            0.124     0.124     0.124
imean           8.903     8.903     8.903
imin            7.994     8.002     7.993
imax            9.854     9.855     9.856
excite_mean     0.187     0.187     0.187
fracstop        1.000     1.000     1.000
cjmean          3.053     3.053     3.053

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       180.3     180.2     180.3
kozaiamp        179.9     179.9     180.0