Orbit Fit and Astrometric record for 118702

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: 118702    
# Created Sun Oct 22 01:36:28 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   21 observations of   21
# Arc:   7.98y
# First observation: 2000/07/31
#  Last observation: 2008/07/25
# Chi-squared of fit:    30.16 DOF:   36 RMS:  0.21
# Min/Max residuals:    -0.39    0.88
# Exact a, adot, b, bdot, g, gdot:
  1.824368E-05  2.893800E-02  6.878480E-06  1.230011E-02  2.542874E-02  4.744388E-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
    3.975924  -23.144164    0.489726    0.061466   -0.886692  2451756.821653
# Heliocentric elements and errors
Epoch:              2451756.5000  =  2000/07/31
Mean Anomaly:            4.13474 +/-     0.000
Argument of Peri:      349.16685 +/-     0.000
Long of Asc Node:      327.11024 +/-     0.000
Inclination:            23.35287 +/-     0.000
Eccentricity:         0.60411786 +/-    0.0000
Semi-Major Axis:     99.12738257 +/-    0.0000
Time of Perihelion: 2447616.1733 +/-       0.0
Perihelion:          39.24276064 +/-    0.0000
Aphelion:           159.01200449 +/-    0.0000
Period (y)              986.9580 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           36.70445610 +/-    0.0000
Ecliptic Y          -16.21437171 +/-    0.0000
Ecliptic Z            2.72698162 +/-    0.0000
Ecliptic XDOT         0.00160162 +/-    0.0000
Ecliptic YDOT         0.00270630 +/-    0.0000
Ecliptic ZDOT         0.00135670 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.21878856 +/-    0.0000
Geocenter to KBO     39.32550028 +/-    0.0000
# Hcoef:  6.56

The following table shows the complete astrometric record for 118702. 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 (118702) followed by the observatory code and reference code for the source of the astrometry.

2000 07  31.32091  22 28 26.03   -05 17 56.3   22.1R 118702    807  Cc0956      
2000 07  31.40061  22 28 25.71   -05 17 57.8         118702    807  Cc0956      
2000 08  27.14678  22 26 24.91   -05 25 43.3   22.0R 118702    807  Cc0956      
2000 08  27.21908  22 26 24.56   -05 25 45.0         118702    807  Cc0956      
2000 09  21.19885  22 24 30.55   -05 34 18.7   22.6R 118702    695  Cc2364      
2000 09  21.28144  22 24 30.19   -05 34 20.4         118702    695  Cc2364      
2001 08  20.16145  22 32 07.65   -04 07 34.4   21.0R 118702    807  Cd7641      
2001 08  20.24342  22 32 07.24   -04 07 35.9         118702    807  Cd7641      
2001 08  21.16817  22 32 02.95   -04 07 53.4   21.5R 118702    807  Cd7641      
2001 08  21.24278  22 32 02.61   -04 07 54.8         118702    807  Cd7641      
2001 09  23.15748  22 29 32.32   -04 19 17.5         118702    290  Cd7641      
2001 09  23.19120  22 29 32.17   -04 19 18.3         118702    290  Cd7641      
2003 07  07.45374  22 44 51.97   -01 31 05.1   23.0R 118702    568  Ci2628      
2003 07  07.56360  22 44 51.70   -01 31 05.3         118702    568  Ci2628      
2003 07  08.49434  22 44 49.53   -01 31 04.3         118702    568  Ci2628      
2005 09  30.17329  22 48 59.49   +00 33 44.4   22.8R 118702    688  Co3359      
2005 09  30.26824  22 48 59.08   +00 33 43.2         118702    688  Co3359      
2008 07  25.37324  23 07 58.05   +04 25 06.5   23.5R 118702    250  S~06HA      
2008 07  25.43018  23 07 57.88   +04 25 06.4         118702    250  S~06HA      
2008 07  25.43643  23 07 57.86   +04 25 06.4         118702    250  S~06HA      
2008 07  25.44268  23 07 57.84   +04 25 06.3         118702    250  S~06HB      

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    -0.13       0.00    -0.10
  2   0.0002      0.00     0.14       0.00    -0.28
  3   0.0734      0.00     0.14       0.00     0.09
  4   0.0736      0.00     0.11       0.00    -0.15
  5   0.1420      0.00     0.02       0.00    -0.00
  6   0.1423      0.00    -0.05       0.00    -0.05
  7   1.0536      0.00     0.48       0.00    -0.05
  8   1.0539      0.00     0.12       0.00    -0.00
  9   1.0564      0.00     0.04       0.00    -0.01
 10   1.0566      0.00     0.23       0.00     0.01
 11   1.1467      0.00     0.11       0.00     0.05
 12   1.1468      0.00     0.01       0.00    -0.06
 13   2.9326      0.00    -0.07       0.00     0.27
 14   2.9329      0.00    -0.22       0.00    -0.06
 15   2.9355      0.00    -0.27       0.00     0.10
 16   5.1659      0.00    -0.06       0.00    -0.11
 17   5.1662      0.00    -0.39       0.00     0.88
 18   7.9837      0.00     0.21       0.00    -0.05
 19   7.9839      0.00     0.26       0.00    -0.01
 20   7.9839      0.00     0.25       0.00     0.00
 21   7.9839      0.00     0.24       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.

118702    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        99.642    99.643    99.641
ecceobj         0.606     0.606     0.606
incobj         23.336    23.336    23.336
qmin           37.226    37.214    37.225
qmax          164.098   163.707   163.419
amean          98.415    98.325    98.329
amin           96.698    96.664    96.654
amax          101.127   100.950   100.787
emean           0.607     0.607     0.607
emin            0.593     0.593     0.593
emax            0.623     0.622     0.621
imean          23.869    23.850    23.858
imin           23.155    23.136    23.139
imax           24.887    24.887    24.890
excite_mean     0.729     0.729     0.729
fracstop        1.000     1.000     1.000
cjmean          2.933     2.933     2.934

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        96.6      97.1      96.8
kozaiamp        180.0     180.0     180.0