Orbit Fit and Astrometric record for 455171

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: 455171    
# Created Fri Dec 15 02:36:45 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   40 observations of   40
# Arc:  15.86y
# First observation: 1999/07/19
#  Last observation: 2015/05/28
# Chi-squared of fit:    89.14 DOF:   74 RMS:  0.26
# Min/Max residuals:    -0.63    0.59
# Exact a, adot, b, bdot, g, gdot:
  1.861304E-05  2.283405E-02  1.286717E-06 -7.680583E-04  2.350215E-02  2.656497E-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
   -0.806139  -43.562881    0.354419   -0.013604   -0.950072  2451379.009693
# Heliocentric elements and errors
Epoch:              2451378.5000  =  1999/07/19
Mean Anomaly:           55.01544 +/-     0.000
Argument of Peri:      135.05720 +/-     0.000
Long of Asc Node:      113.79043 +/-     0.000
Inclination:             2.08655 +/-     0.000
Eccentricity:         0.11909512 +/-    0.0000
Semi-Major Axis:     46.17272565 +/-    0.0000
Time of Perihelion: 2433865.5696 +/-       0.0
Perihelion:          40.67377954 +/-    0.0000
Aphelion:            51.67167176 +/-    0.0000
Period (y)              313.7520 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           31.28164116 +/-    0.0000
Ecliptic Y          -30.22955023 +/-    0.0000
Ecliptic Z           -0.59856732 +/-    0.0000
Ecliptic XDOT         0.00205303 +/-    0.0000
Ecliptic YDOT         0.00172363 +/-    0.0000
Ecliptic ZDOT        -0.00009377 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.50539160 +/-    0.0000
Geocenter to KBO     42.54925013 +/-    0.0000
# Hcoef:  7.07

The following table shows the complete astrometric record for 455171. 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 (455171) followed by the observatory code and reference code for the source of the astrometry.

1999 07  19.50895  21 16 34.83   -16 40 44.4   23.6R 455171    568  Ca7328      
1999 07  19.54299  21 16 34.70   -16 40 45.0         455171    568  Ca7328      
1999 07  19.58434  21 16 34.50   -16 40 46.0         455171    568  Ca7328      
1999 08  11.33853  21 14 52.32   -16 48 42.0   23.0R 455171    675  Ca7328      
1999 08  11.35424  21 14 52.23   -16 48 42.4   23.0R 455171    675  Ca7328      
2000 08  05.46359  21 20 31.51   -16 25 39.1   23.2R 455171    568  Cb7609      
2000 08  05.50507  21 20 31.31   -16 25 40.1         455171    568  Cb7609      
2000 08  05.54662  21 20 31.11   -16 25 40.9         455171    568  Cb7609      
2000 08  06.45166  21 20 27.01   -16 26 00.2   22.8R 455171    568  Cb7609      
2000 08  06.49431  21 20 26.81   -16 26 01.1   22.9R 455171    568  Cb7609      
2000 08  06.53623  21 20 26.63   -16 26 02.0         455171    568  Cb7609      
2001 07  20.43942  21 26 55.245  -15 58 15.56        455171    568  Cl5164      
2001 07  21.46481  21 26 50.946  -15 58 37.11        455171    568  Cl5164      
2001 07  25.52825  21 26 33.64   -16 00 02.3   23.3R 455171    568  Cd2765      
2001 07  25.56190  21 26 33.50   -16 00 02.9   23.2R 455171    568  Cd2765      
2001 07  25.59893  21 26 33.34   -16 00 03.6   22.8R 455171    568  Cd2765      
2001 07  26.55223  21 26 29.21   -16 00 24.0         455171    568  Cd2765      
2004 08  19.37071  21 40 01.78   -15 02 41.2   23.7g 455171    568  C~0VDL      
2004 08  19.39699  21 40 01.65   -15 02 42.0   23.5g 455171    568  C~0VDL      
2004 08  19.42797  21 40 01.50   -15 02 42.7   23.5g 455171    568  C~0VDL      
2004 08  20.40532  21 39 57.15   -15 03 04.4   23.5g 455171    568  C~0VDL      
2004 10  13.26274  21 36 48.02   -15 18 22.6   23.1i 455171    568  C~0VDL      
2004 10  13.32421  21 36 47.93   -15 18 23.4   23.8i 455171    568  C~0VDL      
2004 10  13.38309  21 36 47.80   -15 18 23.4   23.3i 455171    568  C~0VDL      
2006 07  20.45430  21 52 11.81   -14 05 16.2   24.0r 455171    568  C~0VDL      
2006 07  20.48068  21 52 11.70   -14 05 16.8   24.1r 455171    568  C~0VDL      
2006 07  20.50719  21 52 11.62   -14 05 17.6   24.1r 455171    568  C~0VDL      
2006 07  26.39179  21 51 48.59   -14 07 23.5   23.8r 455171    568  C~0VDL      
2006 07  26.41774  21 51 48.49   -14 07 24.0   23.6r 455171    568  C~0VDL      
2006 07  26.44376  21 51 48.38   -14 07 24.7   23.9r 455171    568  C~0VDL      
2007 09  11.25980  21 53 25.99   -14 01 42.0   22.5r 455171    695  C~0VDL      
2007 09  11.31851  21 53 25.76   -14 01 43.2   22.7r 455171    695  C~0VDL      
2007 09  12.26405  21 53 21.97   -14 02 02.8   22.5r 455171    695  C~0VDL      
2007 09  16.26315  21 53 06.33   -14 03 23.5         455171    675  C~0VDL      
2007 09  18.27398  21 52 58.72   -14 04 02.6         455171    675  C~0VDL      
2015 05  27.351097 22 36 11.62   -10 18 30.3   22.4r 455171    W84  C~1j7P      
2015 05  27.372572 22 36 11.65   -10 18 30.1   23.3r 455171    W84  C~1j7P      
2015 05  27.394052 22 36 11.66   -10 18 30.0   22.5r 455171    W84  C~1j7P      
2015 05  27.415544 22 36 11.67   -10 18 30.0   23.0r 455171    W84  C~1j7P      
2015 05  28.348963 22 36 12.52   -10 18 27.2   22.4r 455171    W84  C~1j7P      

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     0.03       0.00     0.11
  2   0.0001      0.00    -0.24       0.00    -0.46
  3   0.0002      0.00    -0.55       0.00    -0.63
  4   0.0625      0.00     0.59       0.00    -0.35
  5   0.0625      0.00     0.34       0.00    -0.42
  6   1.0485      0.00    -0.05       0.00     0.28
  7   1.0486      0.00    -0.16       0.00     0.17
  8   1.0487      0.00    -0.27       0.00     0.26
  9   1.0512      0.00     0.11       0.00     0.51
 10   1.0513      0.00     0.09       0.00     0.52
 11   1.0514      0.00     0.31       0.00     0.52
 12   2.0039      0.00     0.05       0.00     0.24
 13   2.0067      0.00    -0.07       0.00    -0.04
 14   2.0178      0.00     0.28       0.00     0.30
 15   2.0179      0.00     0.40       0.00     0.41
 16   2.0180      0.00     0.44       0.00     0.49
 17   2.0207      0.00     0.45       0.00     0.43
 18   5.0865      0.00     0.22       0.00     0.01
 19   5.0866      0.00     0.07       0.00    -0.20
 20   5.0867      0.00    -0.07       0.00    -0.19
 21   5.0894      0.00     0.16       0.00     0.18
 22   5.2368      0.00    -0.32       0.00    -0.13
 23   5.2370      0.00     0.16       0.00    -0.41
 24   5.2372      0.00    -0.05       0.00     0.08
 25   7.0033      0.00     0.06       0.00    -0.11
 26   7.0033      0.00    -0.06       0.00    -0.16
 27   7.0034      0.00     0.28       0.00    -0.40
 28   7.0195      0.00    -0.24       0.00     0.07
 29   7.0196      0.00    -0.15       0.00     0.14
 30   7.0197      0.00    -0.20       0.00     0.02
 31   8.1472      0.00     0.00       0.00     0.00
 32   8.1473      0.00     0.16       0.00     0.02
 33   8.1499      0.00     0.07       0.00    -0.00
 34   8.1609      0.00     0.15       0.00    -0.20
 35   8.1664      0.00     0.28       0.00    -0.32
 36  15.8545      0.00    -0.05       0.00    -0.02
 37  15.8545      0.00     0.12       0.00     0.11
 38  15.8546      0.00    -0.01       0.00     0.14
 39  15.8546      0.00    -0.14       0.00     0.08
 40  15.8572      0.00     0.00       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.

455171    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.087    46.088    46.087
ecceobj         0.118     0.118     0.118
incobj          2.087     2.087     2.087
qmin           39.964    39.950    39.992
qmax           52.457    52.452    52.426
amean          46.051    46.051    46.051
amin           45.662    45.662    45.672
amax           46.474    46.467    46.472
emean           0.115     0.115     0.115
emin            0.102     0.102     0.102
emax            0.129     0.129     0.128
imean           0.814     0.814     0.814
imin            0.310     0.310     0.310
imax            1.216     1.217     1.216
excite_mean     0.116     0.116     0.116
fracstop        1.000     1.000     1.000
cjmean          3.110     3.110     3.110

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       169.8     169.7     170.0
kozaiamp        180.0     180.0     180.0