Orbit Fit and Astrometric record for 316179

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: 316179    
# Created Sat Dec 16 02:36:44 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   71 observations of   72
# Arc:  25.45y
# First observation: 1989/11/04
#  Last observation: 2015/04/18
# Chi-squared of fit:   165.42 DOF:  136 RMS:  0.27
# Min/Max residuals:    -0.75    0.80
# Exact a, adot, b, bdot, g, gdot:
  2.148782E-05  7.119202E-02 -7.176428E-06 -2.273659E-02  4.842454E-02 -5.089674E-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
   -7.394802   76.847920    0.564664   -0.104844   -0.807774  2447834.872180
# Heliocentric elements and errors
Epoch:              2447834.5000  =  1989/11/04
Mean Anomaly:          348.68464 +/-     0.000
Argument of Peri:      224.83801 +/-     0.000
Long of Asc Node:      234.34861 +/-     0.000
Inclination:            19.21511 +/-     0.000
Eccentricity:         0.31745743 +/-    0.0000
Semi-Major Axis:     30.86129695 +/-    0.0000
Time of Perihelion: 2449802.7738 +/-       0.0
Perihelion:          21.06414906 +/-    0.0000
Aphelion:            40.65844484 +/-    0.0000
Period (y)              171.4468 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            5.39545458 +/-    0.0000
Ecliptic Y           20.60630012 +/-    0.0000
Ecliptic Z           -2.65797715 +/-    0.0000
Ecliptic XDOT        -0.00402763 +/-    0.0000
Ecliptic YDOT         0.00047753 +/-    0.0000
Ecliptic ZDOT        -0.00123767 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   21.46619244 +/-    0.0000
Geocenter to KBO     20.65075198 +/-    0.0000
# Hcoef:  6.97

The following table shows the complete astrometric record for 316179. 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 (316179) followed by the observatory code and reference code for the source of the astrometry.

1989 11  04.37153  05 05 51.03   +15 25 42.8         316179    261   ~0Gty      
1990 01  26.13889  04 54 50.92   +14 55 40.2         316179    261   ~0Gty      
1992 12  20.33056  05 51 50.29   +11 57 27.0         316179    261   ~0Gty      
1997 03  08.18819  06 51 51.74   +07 13 41.3         316179    261   ~0Gty      
1997 03  28.15347  06 51 46.19   +07 25 20.3         316179    261   ~0Gty      
1997 11  06.46181  07 22 13.73   +05 46 55.5         316179    261   ~0Gty      
2002 01  10.25314  08 20 28.06   -00 13 18.4   19.3R 316179    644  C~0Gty      
2002 01  10.27358  08 20 27.91   -00 13 17.6   19.7R 316179    644  C~0Gty      
2002 01  10.29359  08 20 27.74   -00 13 17.5   19.2R 316179    644  C~0Gty      
2002 02  20.12204  08 14 49.42   +00 06 54.3   19.0R 316179    644  C~0Gty      
2003 01  25.35759  08 34 06.79   -01 32 07.2   19.3R 316179    644  C~0Gty      
2003 01  25.37876  08 34 06.64   -01 32 06.3   19.1R 316179    644  C~0Gty      
2003 01  25.39983  08 34 06.45   -01 32 05.5   19.5R 316179    644  C~0Gty      
2005 02  05.27221  09 03 11.46   -04 07 09.4   19.4R 316179    644  C~0Gty      
2005 02  05.34123  09 03 10.87   -04 07 06.8   19.9R 316179    644  C~0Gty      
2005 02  05.40587  09 03 10.32   -04 07 04.8   19.8R 316179    644  C~0Gty      
2006 01  25.31972  09 19 35.65   -05 28 54.5   20.8R 316179    644  C~0Gty      
2006 01  25.38216  09 19 35.15   -05 28 53.2   20.7R 316179    644  C~0Gty      
2006 01  25.44890  09 19 34.58   -05 28 52.0   20.4R 316179    644  C~0Gty      
2010 03  07.01566  10 10 46.018  -09 37 48.46  20.5R 316179    809  C~0F7m      
2010 03  07.09902  10 10 45.414  -09 37 44.04  20.3R 316179    809  C~0F7m      
2010 03  07.18252  10 10 44.784  -09 37 39.18  20.4R 316179    809  C~0F7m      
2010 03  08.15705  10 10 37.650  -09 36 46.33        316179    807  C~0F7m      
2010 03  08.16501  10 10 37.584  -09 36 46.00  20.3R 316179    809  C~0F7m      
2010 03  08.21866  10 10 37.189  -09 36 42.91        316179    807  C~0F7m      
2010 03  08.22193  10 10 37.174  -09 36 42.69  20.4R 316179    809  C~0F7m      
2010 03  08.26258  10 10 36.890  -09 36 40.37        316179    807  C~0F7m      
2010 03  08.27432  10 10 36.764  -09 36 39.67  20.2R 316179    809  C~0F7m      
2010 03  10.00573  10 10 24.240  -09 35 03.62  20.4R 316179    809  C~0F7m      
2010 03  10.17343  10 10 23.009  -09 34 54.33  20.5R 316179    809  C~0F7m      
2010 03  11.24671  10 10 15.355  -09 33 54.72        316179    807  C~0F7m      
2010 03  11.26081  10 10 15.254  -09 33 53.92        316179    807  C~0F7m      
2010 03  23.23765  10 08 55.042  -09 21 58.70  20.5R 316179    807  C~0Fo2      
2010 03  24.20815  10 08 49.085  -09 20 58.64  20.5R 316179    807  C~0Fo2      
2010 03  24.25624  10 08 48.791  -09 20 55.23  20.5R 316179    807  C~0Fo2      
2010 04  20.22744  10 06 47.11   -08 52 32.4   20.3R 316179    688  C~0GX1      
2010 04  20.27383  10 06 46.98   -08 52 29.6         316179    688  C~0GX1      
2010 04  23.00872  10 06 40.219  -08 49 44.08  20.4R 316179    807  C~0Gty      
2010 04  23.05998  10 06 40.104  -08 49 40.87  20.1R 316179    807  C~0Gty      
2011 04  04.38116  10 21 06.76   -10 10 15.3   19.9R 316179    E10  C~0V9L      
2011 04  04.39786  10 21 06.68   -10 10 14.4   19.9R 316179    E10  C~0V9L      
2012 01  21.392092 10 42 27.824  -11 55 49.93  21.2R 316179    695  C~0d5H      
2012 01  21.461016 10 42 27.454  -11 55 50.10  20.6R 316179    695  C~0d5H      
2012 01  21.468866 10 42 27.402  -11 55 49.87  20.5R 316179    695  C~0d5H      
2012 01  30.371615 10 41 35.282  -11 54 55.00  20.8R 316179    695  C~0d5H      
2012 01  30.401516 10 41 35.088  -11 54 54.64  20.6R 316179    695  C~0d5H      
2012 03  21.35205  10 35 30.386  -11 21 21.93  21.2g 316179    F51  C~1vxL      
2012 03  21.35795  10 35 30.330  -11 21 21.64  21.4g 316179    F51  C~1vxL      
2012 03  21.37171  10 35 30.258  -11 21 20.67  20.8r 316179    F51  C~1vxL      
2013 03  13.06422  10 49 19.33   -12 23 00.6   20.5R 316179    807  C~0qiG      
2013 03  13.07303  10 49 19.27   -12 23 00.3   20.3R 316179    807  C~0qiG      
2013 03  13.26308  10 49 17.87   -12 22 50.1   20.6R 316179    807  C~0qiG      
2014 02  21.47572  11 04 16.501  -13 27 13.67  20.5i 316179    F51  C~1vxL      
2014 02  21.48797  11 04 16.418  -13 27 13.29  20.5i 316179    F51  C~1vxL      
2014 02  21.50021  11 04 16.317  -13 27 12.91  20.6i 316179    F51  C~1vxL      
2014 02  21.51244  11 04 16.234  -13 27 12.60  20.5i 316179    F51  C~1vxL      
2015 01  16.57971  11 19 47.886  -14 18 59.36  21.3r 316179    F51  C~1vxL      
2015 01  16.59034  11 19 47.855  -14 18 59.57  21.5r 316179    F51  C~1vxL      
2015 01  16.60126  11 19 47.809  -14 18 59.62  21.2r 316179    F51  C~1vxL      
2015 01  16.61189  11 19 47.777  -14 18 59.82  21.4r 316179    F51  C~1vxL      
2015 01  18.57497  11 19 40.636  -14 19 20.99  21.5w 316179    F51  C~1vxL      
2015 01  18.58619  11 19 40.589  -14 19 21.17  21.4w 316179    F51  C~1vxL      
2015 01  18.59743  11 19 40.551  -14 19 21.28  21.6w 316179    F51  C~1vxL      
2015 01  18.60863  11 19 40.494  -14 19 21.41  21.4w 316179    F51  C~1vxL      
2015 04  10.34362  11 11 05.249  -13 32 57.09  21.1w 316179    F51  C~1vxL      
2015 04  10.35426  11 11 05.187  -13 32 56.45  21.1w 316179    F51  C~1vxL      
2015 04  10.36486  11 11 05.129  -13 32 55.75  21.2w 316179    F51  C~1vxL      
2015 04  10.37551  11 11 05.059  -13 32 55.08  21.1w 316179    F51  C~1vxL      
2015 04  18.29802  11 10 22.951  -13 24 41.30  21.3w 316179    F51  C~1vxL      
2015 04  18.30867  11 10 22.893  -13 24 40.64  21.2w 316179    F51  C~1vxL      
2015 04  18.31932  11 10 22.839  -13 24 40.01  21.4w 316179    F51  C~1vxL      
2015 04  18.32991  11 10 22.789  -13 24 39.39  21.2w 316179    F51  C~1vxL      

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 (  -0.21)      0.00 (   2.60)
  2   0.2266      0.00    -0.47       0.00     0.14
  3   3.1265      0.00     0.32       0.00    -0.49
  4   7.3397      0.00     0.27       0.00    -0.38
  5   7.3943      0.00    -0.75       0.00    -0.18
  6   8.0057      0.00     0.58       0.00     0.09
  7  12.1831      0.00    -0.33       0.00    -0.14
  8  12.1832      0.00     0.02       0.00     0.47
  9  12.1832      0.00     0.02       0.00     0.39
 10  12.2950      0.00    -0.08       0.00    -0.10
 11  13.2238      0.00    -0.47       0.00    -0.37
 12  13.2238      0.00     0.04       0.00     0.01
 13  13.2239      0.00    -0.07       0.00     0.29
 14  15.2550      0.00     0.55       0.00    -0.16
 15  15.2552      0.00     0.44       0.00     0.05
 16  15.2554      0.00     0.36       0.00    -0.20
 17  16.2244      0.00     0.22       0.00    -0.05
 18  16.2245      0.00     0.28       0.00    -0.04
 19  16.2247      0.00    -0.19       0.00    -0.22
 20  20.3358      0.00    -0.08       0.00     0.12
 21  20.3360      0.00     0.20       0.00     0.06
 22  20.3362      0.00     0.14       0.00     0.41
 23  20.3389      0.00     0.26       0.00     0.22
 24  20.3389      0.00     0.16       0.00     0.12
 25  20.3391      0.00     0.23       0.00     0.26
 26  20.3391      0.00     0.37       0.00     0.31
 27  20.3392      0.00     0.63       0.00     0.39
 28  20.3392      0.00     0.05       0.00     0.45
 29  20.3440      0.00     0.11       0.00     0.58
 30  20.3444      0.00     0.08       0.00     0.50
 31  20.3474      0.00     0.78       0.00    -0.42
 32  20.3474      0.00     0.80       0.00    -0.42
 33  20.3802      0.00     0.14       0.00    -0.19
 34  20.3829      0.00     0.09       0.00    -0.50
 35  20.3830      0.00     0.14       0.00    -0.10
 36  20.4568      0.00    -0.48       0.00     0.08
 37  20.4570      0.00    -0.47       0.00     0.04
 38  20.4644      0.00     0.39       0.00    -0.27
 39  20.4646      0.00     0.54       0.00    -0.13
 40  21.4128      0.00    -0.19       0.00     0.14
 41  21.4128      0.00    -0.05       0.00    -0.02
 42  22.2122      0.00    -0.28       0.00     0.24
 43  22.2124      0.00    -0.11       0.00     0.04
 44  22.2125      0.00    -0.24       0.00     0.27
 45  22.2368      0.00    -0.32       0.00    -0.09
 46  22.2369      0.00    -0.36       0.00    -0.09
 47  22.3764      0.00     0.05       0.00    -0.29
 48  22.3764      0.00    -0.19       0.00    -0.35
 49  22.3765      0.00     0.14       0.00    -0.21
 50  23.3530      0.00     0.03       0.00    -0.02
 51  23.3531      0.00     0.10       0.00    -0.19
 52  23.3536      0.00     0.04       0.00    -0.17
 53  24.2987      0.00    -0.03       0.00    -0.19
 54  24.2987      0.00     0.05       0.00    -0.22
 55  24.2988      0.00    -0.13       0.00    -0.25
 56  24.2988      0.00    -0.05       0.00    -0.36
 57  25.1997      0.00    -0.05       0.00    -0.06
 58  25.1998      0.00     0.07       0.00    -0.14
 59  25.1998      0.00    -0.02       0.00    -0.06
 60  25.1998      0.00     0.08       0.00    -0.13
 61  25.2052      0.00     0.13       0.00     0.02
 62  25.2052      0.00     0.08       0.00    -0.05
 63  25.2053      0.00     0.17       0.00    -0.05
 64  25.2053      0.00    -0.02       0.00    -0.08
 65  25.4291      0.00     0.19       0.00    -0.14
 66  25.4291      0.00     0.19       0.00    -0.16
 67  25.4291      0.00     0.25       0.00    -0.12
 68  25.4292      0.00     0.13       0.00    -0.11
 69  25.4509      0.00     0.04       0.00    -0.00
 70  25.4509      0.00    -0.02       0.00    -0.00
 71  25.4509      0.00    -0.02       0.00    -0.04
 72  25.4509      0.00     0.03       0.00    -0.08

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.

316179    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        30.761    30.761    30.761
ecceobj         0.316     0.316     0.316
incobj         19.221    19.221    19.221
qmin           18.735    20.337    18.930
qmax           42.394    41.023    43.251
amean          30.174    30.225    30.261
amin           28.524    29.431    29.560
amax           30.952    31.194    31.262
emean           0.327     0.308     0.329
emin            0.296     0.293     0.296
emax            0.371     0.330     0.384
imean          18.737    20.013    18.778
imin           16.577    19.317    16.538
imax           20.419    20.837    20.419
excite_mean     0.459     0.460     0.461
fracstop        0.025     0.051     0.027
cjmean          2.794     2.794     2.792

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       297.5     217.8     298.3
kozaiamp         64.3     180.0      63.9