Orbit Fit and Astrometric record for 427507

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: 427507    
# Created Sun Oct 22 01:36:46 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   49 observations of   50
# Arc:  12.27y
# First observation: 2002/02/20
#  Last observation: 2014/05/30
# Chi-squared of fit:   325.67 DOF:   92 RMS:  0.46
# Min/Max residuals:    -1.30    1.11
# Exact a, adot, b, bdot, g, gdot:
  2.603327E-05  1.304224E-01  1.072124E-05  5.391496E-02  7.427499E-02  1.921566E-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
   -1.436890  153.893552    0.037470   -0.024815   -0.986128  2452325.756163
# Heliocentric elements and errors
Epoch:              2452326.5000  =  2002/02/21
Mean Anomaly:           12.62364 +/-     0.000
Argument of Peri:      327.58072 +/-     0.000
Long of Asc Node:      156.96410 +/-     0.000
Inclination:            22.45728 +/-     0.000
Eccentricity:         0.37072271 +/-    0.0000
Semi-Major Axis:     22.19042253 +/-    0.0000
Time of Perihelion: 2450987.6596 +/-       0.0
Perihelion:          13.96392899 +/-    0.0000
Aphelion:            30.41691608 +/-    0.0000
Period (y)              104.5338 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -12.95447138 +/-    0.0000
Ecliptic Y            6.39558115 +/-    0.0000
Ecliptic Z           -0.33745584 +/-    0.0000
Ecliptic XDOT        -0.00280456 +/-    0.0000
Ecliptic YDOT        -0.00398435 +/-    0.0000
Ecliptic ZDOT         0.00196919 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   14.45109320 +/-    0.0000
Geocenter to KBO     13.46346253 +/-    0.0000
# Hcoef: 10.11

The following table shows the complete astrometric record for 427507. 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 (427507) followed by the observatory code and reference code for the source of the astrometry.

2002 02  20.25542  10 21 03.37   +08 44 29.3   22.3V 427507    691  Cf2793      
2002 02  20.27689  10 21 03.12   +08 44 31.1   22.6V 427507    691  Cf2793      
2002 02  20.31045  10 21 02.74   +08 44 34.5   22.5V 427507    691  Cf2793      
2002 02  21.39074  10 20 50.42   +08 46 20.1   22.0V 427507    291  Cf2793      
2002 02  21.41321  10 20 50.17   +08 46 21.6   21.6V 427507    291  Cf2793      
2002 02  21.43966  10 20 49.83   +08 46 24.7   21.3V 427507    291  Cf2793      
2002 02  22.26403  10 20 40.51   +08 47 45.2   21.4V 427507    291  Cf2793      
2002 02  22.28805  10 20 40.24   +08 47 48.1   21.2V 427507    291  Cf2793      
2002 02  22.32667  10 20 39.98   +08 47 53.0   21.4V 427507    291  Cf2793      
2002 03  05.28497  10 18 36.43   +09 05 40.8   21.8V 427507    291  Cf2793      
2002 03  05.28932  10 18 36.40   +09 05 40.7   22.1V 427507    291  Cf2793      
2002 03  05.29332  10 18 36.37   +09 05 42.2   22.1V 427507    291  Cf2793      
2002 03  09.35543  10 17 52.18   +09 12 11.6   21.5V 427507    291  Cf2793      
2002 03  09.37266  10 17 51.91   +09 12 13.5   20.9V 427507    291  Cf2793      
2002 03  09.39679  10 17 51.71   +09 12 15.8   20.9V 427507    291  Cf2793      
2002 03  10.21250  10 17 43.03   +09 13 33.8   20.7V 427507    291  Cf2793      
2002 03  10.22776  10 17 42.84   +09 13 35.2   21.0V 427507    291  Cf2793      
2002 03  10.24411  10 17 42.58   +09 13 36.1   21.3V 427507    291  Cf2793      
2002 05  11.87318  10 12 23.44   +10 19 55.5         427507    950  Cf4815      
2002 05  11.92100  10 12 23.54   +10 19 56.5         427507    950  Cf4815      
2002 05  12.87309  10 12 25.74   +10 20 16.3         427507    950  Cf4815      
2002 05  12.93650  10 12 25.88   +10 20 17.5         427507    950  Cf4815      
2002 11  30.60372  10 58 16.03   +07 30 45.6   21.7R 427507    568  Cg7926      
2002 12  01.58730  10 58 21.83   +07 30 43.1         427507    568  Cg7926      
2002 12  01.61349  10 58 21.95   +07 30 42.9         427507    568  Cg7926      
2003 03  12.32206  10 49 30.69   +09 22 15.6   22.4V 427507    291  Ch4187      
2003 03  12.34556  10 49 30.45   +09 22 16.2   22.2V 427507    291  Ch4187      
2003 03  12.37665  10 49 30.11   +09 22 20.2   22.0V 427507    291  Ch4187      
2003 04  01.17926  10 46 13.73   +09 51 26.7   22.7V 427507    291  Ch6139      
2003 04  01.20289  10 46 13.54   +09 51 27.6   21.9V 427507    291  Ch6139      
2004 02  16.36322  11 24 28.11   +08 37 49.5   22.2V 427507    291  Cj8745      
2004 02  16.38725  11 24 27.93   +08 37 53.4   21.0V 427507    291  Cj8745      
2004 02  16.41208  11 24 27.62   +08 37 54.6   22.5V 427507    291  Cj8745      
2004 04  12.26801  11 15 07.06   +10 02 04.5   22.9V 427507    291  Ck4262      
2004 04  12.28844  11 15 06.85   +10 02 05.5   22.2V 427507    291  Ck4262      
2004 04  12.30864  11 15 06.65   +10 02 07.2   22.6V 427507    291  Ck4262      
2004 04  13.28855  11 14 59.02   +10 03 10.4   22.5V 427507    291  Ck4262      
2004 04  13.30953  11 14 58.84   +10 03 12.8   22.7V 427507    291  Ck4262      
2004 04  13.32990  11 14 58.64   +10 03 14.0   21.6V 427507    291  Ck4262      
2004 05  26.05890  11 12 34.31   +10 25 41.0         427507    304  Ck8672      
2004 05  26.10938  11 12 34.38   +10 25 40.9         427507    304  Ck8672      
2007 03  18.212383 12 41 56.20   +08 28 57.9   22.4  427507    H55  Cu4522      
2007 03  18.275451 12 41 55.55   +08 29 03.0   22.6  427507    H55  Cu4522      
2007 03  18.319134 12 41 55.13   +08 29 07.3   22.3  427507    H55  Cu4522      
2007 03  18.332122 12 41 54.99   +08 29 09.5   22.5  427507    H55  Cu4522      
2014 05  28.29841  14 53 08.71   +05 41 17.3   22.5R 427507    695  C~1LJ6      
2014 05  28.40676  14 53 07.80   +05 41 18.6         427507    695  C~1LJ6      
2014 05  30.23427  14 52 52.86   +05 41 45.4   23.0R 427507    695  C~1LJ6      
2014 05  30.36429  14 52 51.78   +05 41 47.1         427507    695  C~1LJ6      
2014 05  30.40198  14 52 51.47   +05 41 47.6         427507    695  C~1LJ6      

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    -0.34       0.00     0.53
  2   0.0001      0.00     0.50       0.00    -0.36
  3   0.0002      0.00     0.64       0.00    -0.23
  4   0.0031      0.00     0.38       0.00    -0.13
  5   0.0032      0.00     0.53       0.00    -0.82
  6   0.0032      0.00     0.02       0.00    -0.30
  7   0.0055      0.00     0.30       0.00    -0.43
  8   0.0056      0.00     0.43       0.00     0.12
  9   0.0057      0.00 (   3.25)      0.00 (   1.24)
 10   0.0357      0.00    -0.25       0.00    -0.10
 11   0.0357      0.00     0.03       0.00    -0.63
 12   0.0357      0.00     0.26       0.00     0.49
 13   0.0468      0.00     0.65       0.00     0.18
 14   0.0469      0.00    -0.58       0.00     0.45
 15   0.0469      0.00     0.37       0.00     0.46
 16   0.0492      0.00     0.30       0.00     0.98
 17   0.0492      0.00    -0.06       0.00     0.93
 18   0.0493      0.00    -1.30       0.00     0.28
 19   0.2207      0.00    -0.06       0.00    -0.40
 20   0.2209      0.00     0.03       0.00    -0.42
 21   0.2235      0.00    -0.06       0.00    -0.42
 22   0.2236      0.00    -0.08       0.00    -0.48
 23   0.7758      0.00    -0.24       0.00    -0.50
 24   0.7785      0.00     0.23       0.00    -0.48
 25   0.7785      0.00    -0.15       0.00    -0.65
 26   1.0543      0.00    -0.48       0.00     0.60
 27   1.0543      0.00    -0.19       0.00    -1.04
 28   1.0544      0.00    -0.15       0.00    -0.00
 29   1.1086      0.00     0.30       0.00     0.38
 30   1.1087      0.00     0.62       0.00    -0.59
 31   1.9880      0.00    -0.17       0.00    -0.43
 32   1.9880      0.00     0.63       0.00     1.11
 33   1.9881      0.00    -0.40       0.00    -0.12
 34   2.1410      0.00     0.96       0.00     0.16
 35   2.1411      0.00     0.30       0.00    -0.18
 36   2.1411      0.00    -0.25       0.00     0.19
 37   2.1438      0.00     0.25       0.00    -0.48
 38   2.1439      0.00     0.05       0.00     0.57
 39   2.1439      0.00    -0.53       0.00     0.47
 40   2.2609      0.00    -0.47       0.00    -0.55
 41   2.2611      0.00    -0.43       0.00    -0.50
 42   5.0704      0.00     0.49       0.00     0.51
 43   5.0706      0.00     0.13       0.00    -0.35
 44   5.0707      0.00     0.33       0.00    -0.16
 45   5.0707      0.00     0.17       0.00     0.82
 46  12.2657      0.00     0.08       0.00     0.06
 47  12.2660      0.00     0.07       0.00    -0.35
 48  12.2710      0.00     0.11       0.00    -0.13
 49  12.2713      0.00     0.02       0.00    -0.13
 50  12.2714      0.00     0.00       0.00    -0.11

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.

427507    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        22.063    22.063    22.063
ecceobj         0.367     0.367     0.367
incobj         22.490    22.490    22.490
qmin           13.680    13.680    13.680
qmax           30.610    30.611    30.610
amean          22.058    21.946    22.027
amin           21.828    21.436    21.847
amax           22.485    22.285    22.251
emean           0.349     0.348     0.350
emin            0.312     0.307     0.305
emax            0.382     0.382     0.382
imean          22.735    22.629    22.617
imin           21.413    21.413    21.413
imax           24.426    24.100    24.175
excite_mean     0.521     0.519     0.521
fracstop        0.025     0.032     0.024
cjmean          2.843     2.847     2.845

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       320.4     247.4     328.9
kozaiamp        179.6     179.3       7.3