Orbit Fit and Astrometric record for 87555

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: 87555     
# Created Fri Oct 20 01:36:27 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   32 observations of   32
# Arc:  13.10y
# First observation: 2000/08/25
#  Last observation: 2013/09/29
# Chi-squared of fit:   146.38 DOF:   58 RMS:  0.38
# Min/Max residuals:    -1.75    0.93
# Exact a, adot, b, bdot, g, gdot:
  2.691016E-05  9.866007E-02  3.679231E-06  1.097536E-02  5.821409E-02  3.288171E-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
   -2.407559  -50.606671   -0.383636   -0.039324   -0.931175  2451781.539503
# Heliocentric elements and errors
Epoch:              2451782.5000  =  2000/08/26
Mean Anomaly:           14.74097 +/-     0.000
Argument of Peri:      284.32539 +/-     0.000
Long of Asc Node:      330.17342 +/-     0.000
Inclination:             6.79665 +/-     0.000
Eccentricity:         0.56038502 +/-    0.0000
Semi-Major Axis:     34.67948408 +/-    0.0000
Time of Perihelion: 2448728.0650 +/-       0.0
Perihelion:          15.24562060 +/-    0.0000
Aphelion:            54.11334755 +/-    0.0000
Period (y)              204.2289 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           11.78616507 +/-    0.0000
Ecliptic Y          -13.73572612 +/-    0.0000
Ecliptic Z           -0.72154343 +/-    0.0000
Ecliptic XDOT         0.00457292 +/-    0.0000
Ecliptic YDOT         0.00173928 +/-    0.0000
Ecliptic ZDOT         0.00045091 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   18.11349327 +/-    0.0000
Geocenter to KBO     17.17786000 +/-    0.0000
# Hcoef:  8.13

The following table shows the complete astrometric record for 87555. 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 (87555) followed by the observatory code and reference code for the source of the astrometry.

2000 08  25.03876  20 50 02.73   -20 13 22.8   20.4R 87555     807  Cc1045      
2000 08  25.10181  20 50 02.14   -20 13 24.5         87555     807  Cc1045      
2000 08  27.11767  20 49 43.80   -20 14 16.1         87555     807  Cc1045      
2000 08  28.03186  20 49 35.64   -20 14 38.7         87555     807  Cc1045      
2000 10  02.12275  20 45 56.08   -20 21 44.9   21.0R 87555     688  Cc1045      
2000 10  02.19561  20 45 55.88   -20 21 44.4         87555     688  Cc1045      
2001 08  19.12089  21 12 27.59   -18 01 50.5   19.1R 87555     807  Cd7651      
2001 08  19.19962  21 12 26.83   -18 01 53.3         87555     807  Cd7651      
2001 08  21.12734  21 12 08.34   -18 03 00.0   19.8R 87555     807  Cd7651      
2001 08  21.20065  21 12 07.63   -18 03 02.6         87555     807  Cd7651      
2001 09  12.22669  21 08 58.01   -18 13 38.8   20.9R 87555     695  Cd7651      
2001 09  12.27374  21 08 57.66   -18 13 39.8         87555     695  Cd7651      
2001 09  19.12648  21 08 10.50   -18 15 55.7   21.0R 87555     688  Cd7651      
2001 09  19.22799  21 08 09.85   -18 15 57.4         87555     688  Cd7651      
2002 07  10.19841  21 37 52.50   -15 28 32.9   20.9R 87555     304  Cf9761      
2002 07  10.42178  21 37 50.74   -15 28 39.6         87555     304  Cf9761      
2002 07  13.22786  21 37 29.95   -15 30 12.3         87555     304  Cf9761      
2002 07  13.24957  21 37 29.78   -15 30 13.0         87555     304  Cf9761      
2002 07  18.12573  21 36 51.42   -15 33 03.9         87555     304  Cf9761      
2002 07  18.41358  21 36 49.03   -15 33 14.5         87555     304  Cf9761      
2004 05  27.34074  22 12 44.22   -11 18 36.9   21.5R 87555     304  Ck8648      
2004 05  27.37801  22 12 44.25   -11 18 36.5         87555     304  Ck8648      
2004 12  13.252074 22 00 37.044  -12 08 11.97  21.3R 87555     568  Cm3239      
2004 12  13.257770 22 00 37.085  -12 08 11.73  21.3R 87555     568  Cm3239      
2004 12  13.263469 22 00 37.122  -12 08 11.55  21.2R 87555     568  Cm3239      
2009 09  16.328577 23 06 59.10   -03 28 35.3   21.8V 87555     645  C~2FlW      
2009 09  16.329407 23 06 59.09   -03 28 35.4   21.6V 87555     645  C~2FlW      
2009 09  16.331894 23 06 59.07   -03 28 35.2   22.3V 87555     645  C~2FlW      
2009 09  18.22100  23 06 45.11   -03 29 57.6   22.1R 87555     688  C~09l9      
2009 09  18.27039  23 06 44.75   -03 29 59.7         87555     688  C~09l9      
2013 09  29.19286  23 44 00.09   +01 47 14.2         87555     W84  C~26Jr      
2013 09  29.19426  23 44 00.09   +01 47 14.2         87555     W84  C~26Jr      

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    -0.28       0.00    -1.75
  2   0.0002      0.00     0.14       0.00    -0.15
  3   0.0057      0.00     0.17       0.00    -0.14
  4   0.0082      0.00     0.20       0.00    -0.12
  5   0.1043      0.00     0.05       0.00    -0.49
  6   0.1045      0.00     0.54       0.00    -0.13
  7   0.9831      0.00    -0.07       0.00     0.00
  8   0.9833      0.00     0.13       0.00    -0.04
  9   0.9886      0.00    -0.08       0.00     0.12
 10   0.9888      0.00    -0.04       0.00     0.04
 11   1.0491      0.00    -0.03       0.00     0.08
 12   1.0492      0.00     0.06       0.00     0.12
 13   1.0680      0.00    -0.04       0.00    -0.04
 14   1.0683      0.00     0.15       0.00     0.02
 15   1.8731      0.00     0.20       0.00    -0.12
 16   1.8737      0.00    -1.30       0.00     0.39
 17   1.8814      0.00    -0.12       0.00     0.63
 18   1.8815      0.00    -0.13       0.00     0.67
 19   1.8948      0.00     0.90       0.00     0.09
 20   1.8956      0.00     0.93       0.00    -0.14
 21   3.7544      0.00     0.09       0.00     0.18
 22   3.7545      0.00    -0.24       0.00     0.10
 23   4.3017      0.00    -0.10       0.00    -0.10
 24   4.3018      0.00    -0.05       0.00    -0.09
 25   4.3018      0.00    -0.07       0.00    -0.15
 26   9.0603      0.00     0.31       0.00    -0.21
 27   9.0603      0.00     0.25       0.00    -0.27
 28   9.0604      0.00     0.23       0.00     0.04
 29   9.0655      0.00    -0.17       0.00     0.09
 30   9.0657      0.00    -0.03       0.00     0.14
 31  13.0956      0.00     0.02       0.00    -0.00
 32  13.0956      0.00     0.16       0.00     0.06

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.

87555    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        34.770    34.771    34.770
ecceobj         0.561     0.561     0.561
incobj          6.792     6.792     6.792
qmin           14.512    15.168    14.773
qmax           57.007    56.046    63.212
amean          35.016    35.220    36.914
amin           33.996    34.771    34.557
amax           36.018    35.731    39.461
emean           0.574     0.565     0.589
emin            0.555     0.559     0.559
emax            0.590     0.573     0.602
imean           6.441     7.881     6.989
imin            5.412     7.654     5.559
imax            8.140     8.026     9.364
excite_mean     0.585     0.582     0.601
fracstop        0.016     0.001     0.023
cjmean          2.615     2.621     2.593

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       169.3     287.6     158.0
kozaiamp        178.4       3.4     179.2