Orbit Fit and Astrometric record for 118698

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: 118698    
# Created Fri Dec  3 02:06:59 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     52 observations of     52
# Arc:  21.13y
# First observation: 2000/07/28
#  Last observation: 2021/09/12
# Chi-squared of fit:   170.87 DOF:     98 RMS:  0.32
# Min/Max residuals:    -0.69    1.13
# Exact a, adot, b, bdot, g, gdot:
  1.582326E-05  2.632832E-02  3.267474E-06  5.212276E-03  2.612642E-02 -5.957309E-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
    1.007516  -70.397359   -0.269568    0.017035   -0.978943  2451753.681573
# Heliocentric elements and errors
Epoch:              2451754.5000  =  2000/07/29
Mean Anomaly:          307.15151 +/-     0.000
Argument of Peri:       82.94162 +/-     0.000
Long of Asc Node:      285.05412 +/-     0.000
Inclination:            11.23558 +/-     0.000
Eccentricity:         0.23376876 +/-    0.0000
Semi-Major Axis:     43.55846457 +/-    0.0000
Time of Perihelion: 2467169.2812 +/-       0.0
Perihelion:          33.37585620 +/-    0.0000
Aphelion:            53.74107294 +/-    0.0000
Period (y)              287.4862 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           13.42805313 +/-    0.0000
Ecliptic Y          -36.87902390 +/-    0.0000
Ecliptic Z            0.67314342 +/-    0.0000
Ecliptic XDOT         0.00237936 +/-    0.0000
Ecliptic YDOT         0.00152829 +/-    0.0000
Ecliptic ZDOT         0.00053529 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.25351876 +/-    0.0000
Geocenter to KBO     38.27561574 +/-    0.0000
# Hcoef:  8.25

The following table shows the complete astrometric record for 118698. 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 (118698) followed by the observatory code and reference code for the source of the astrometry.

2000 07  28.18083  19 24 14.21   -21 00 36.3   23.9R 118698    309  Cb7916      
2000 07  28.22055  19 24 14.00   -21 00 36.5         118698    309  Cb7916      
2000 07  28.25960  19 24 13.80   -21 00 36.8   23.8R 118698    309  Cb7916      
2000 07  29.07469  19 24 09.61   -21 00 43.1   23.8R 118698    309  Cb7916      
2000 07  29.18657  19 24 09.03   -21 00 44.1   23.6R 118698    309  Cb7916      
2000 07  29.22275  19 24 08.84   -21 00 44.4   23.7R 118698    309  Cb7916      
2000 08  03.05532  19 23 44.41   -21 01 21.7   24.0R 118698    809  Cb7916      
2000 08  03.09550  19 23 44.22   -21 01 22.4         118698    809  Cb7916      
2000 08  03.11642  19 23 44.12   -21 01 22.4         118698    809  Cb7916      
2000 08  07.02778  19 23 25.05   -21 01 51.4   23.6R 118698    809  Cb9203      
2000 08  07.03376  19 23 25.03   -21 01 51.7   23.8R 118698    809  Cb9203      
2000 08  07.05300  19 23 24.95   -21 01 51.8   24.2R 118698    809  Cb9203      
2000 08  08.03261  19 23 20.28   -21 01 59.2   24.0R 118698    809  Cb9203      
2000 08  08.04453  19 23 20.23   -21 01 59.2   24.2R 118698    809  Cb9203      
2000 08  08.05646  19 23 20.17   -21 01 59.3   23.8R 118698    809  Cb9203      
2000 09  23.22810  19 21 00.19   -21 05 16.4   23.7R 118698    568  Cb9203      
2000 09  23.33348  19 21 00.06   -21 05 16.4         118698    568  Cb9203      
2000 09  24.22247  19 20 59.33   -21 05 16.7   23.9R 118698    568  Cb9203      
2001 05  29.37243  19 35 22.99   -20 21 51.0   23.4R 118698    695  Cd3308      
2001 05  29.42104  19 35 22.81   -20 21 51.2         118698    695  Cd3308      
2001 07  24.29957  19 30 48.93   -20 28 44.2         118698    568  Cd3308      
2001 07  24.33033  19 30 48.76   -20 28 44.4         118698    568  Cd3308      
2001 07  25.30196  19 30 43.61   -20 28 53.2         118698    568  Cd3308      
2001 07  25.32751  19 30 43.47   -20 28 53.4         118698    568  Cd3308      
2002 07  05.32301  19 38 47.40   -19 53 07.0   23.4R 118698    695  Cf8835      
2002 07  05.36408  19 38 47.15   -19 53 07.3   23.6R 118698    695  Cf8835      
2002 07  05.41774  19 38 46.84   -19 53 08.0         118698    695  Cf8835      
2002 07  06.29244  19 38 42.21   -19 53 15.7         118698    695  Cf8835      
2002 07  06.31943  19 38 42.03   -19 53 15.4         118698    695  Cf8835      
2002 07  06.34566  19 38 41.90   -19 53 16.2         118698    695  Cf8835      
2004 10  12.14623  19 45 28.50   -18 57 29.6   24.0R 118698    309  Cn8269      
2004 10  12.99959  19 45 28.97   -18 57 28.9   24.2R 118698    309  Cn8269      
2006 06  13.39938  20 05 46.67   -17 26 47.5   23.4R 118698    250  S~06HA      
2006 06  13.40378  20 05 46.65   -17 26 47.5         118698    250  S~06HA      
2006 06  13.40818  20 05 46.63   -17 26 47.5         118698    250  S~06HA      
2006 06  13.41258  20 05 46.61   -17 26 47.6         118698    250  S~06HA      
2016 07  14.544085 21 08 28.796  -10 13 13.66  23.8G 118698    F51  C~42B2      
2016 08  03.404713 21 06 45.804  -10 19 02.80  23.4G 118698    F51  C~42B3      
2017 07  26.490686 21 14 10.583  -09 26 43.04  23.7G 118698    F51  C~42B3      
2017 09  13.359360 21 10 03.110  -09 44 46.79  23.5G 118698    F51  C~42B3      
2018 06  18.558063 21 23 34.445  -08 29 22.82  23.4G 118698    F51  C~42B3      
2018 06  18.580150 21 23 34.377  -08 29 22.82  23.5G 118698    F51  C~42B3      
2018 06  18.591182 21 23 34.347  -08 29 22.94  24.1G 118698    F51  C~42B3      
2018 08  05.399876 21 20 03.346  -08 39 12.82  23.2G 118698    F51  C~42B3      
2018 08  06.444139 21 19 57.748  -08 39 34.42  23.9G 118698    F51  C~42B3      
2018 08  13.467535 21 19 19.977  -08 42 10.13  23.2G 118698    F51  C~42B3      
2019 09  04.152830 21 24 15.085  -07 59 21.45  24.0G 118698    G37  C~3WS6      
2019 09  04.233560 21 24 14.678  -07 59 23.65        118698    G37  C~3WS6      
2019 09  04.317650 21 24 14.271  -07 59 25.74        118698    G37  C~3WS6      
2021 09  12.131510 21 37 13.107  -06 17 36.15  23.8G 118698    G37  C~57g3      
2021 09  12.190420 21 37 12.825  -06 17 37.96        118698    G37  C~57g3      
2021 09  12.247780 21 37 12.559  -06 17 39.41        118698    G37  C~57g3      

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    -0.02
     2   0.0001      0.00     0.01       0.00     0.09
     3   0.0002      0.00     0.09       0.00     0.09
     4   0.0024      0.00     0.10       0.00     0.25
     5   0.0028      0.00     0.19       0.00     0.14
     6   0.0029      0.00     0.17       0.00     0.12
     7   0.0161      0.00    -0.00       0.00     0.29
     8   0.0162      0.00     0.19       0.00    -0.10
     9   0.0163      0.00     0.27       0.00     0.06
    10   0.0270      0.00    -0.12       0.00     0.25
    11   0.0270      0.00     0.02       0.00    -0.01
    12   0.0270      0.00     0.22       0.00     0.04
    13   0.0297      0.00    -0.01       0.00    -0.24
    14   0.0297      0.00     0.10       0.00    -0.15
    15   0.0298      0.00     0.06       0.00    -0.17
    16   0.1562      0.00     0.42       0.00    -0.53
    17   0.1565      0.00     0.05       0.00    -0.50
    18   0.1589      0.00     0.33       0.00    -0.51
    19   0.8356      0.00     0.10       0.00    -0.19
    20   0.8357      0.00     0.05       0.00    -0.20
    21   0.9887      0.00     0.05       0.00    -0.29
    22   0.9888      0.00    -0.00       0.00    -0.21
    23   0.9914      0.00     0.12       0.00    -0.28
    24   0.9915      0.00     0.08       0.00    -0.24
    25   1.9360      0.00     0.07       0.00    -0.44
    26   1.9362      0.00    -0.35       0.00    -0.36
    27   1.9363      0.00    -0.64       0.00    -0.57
    28   1.9387      0.00    -0.19       0.00    -0.20
    29   1.9388      0.00    -0.69       0.00     0.35
    30   1.9388      0.00    -0.50       0.00    -0.20
    31   4.2080      0.00    -0.09       0.00     0.10
    32   4.2103      0.00    -0.40       0.00     0.16
    33   5.8760      0.00     0.30       0.00     1.07
    34   5.8760      0.00     0.26       0.00     1.10
    35   5.8761      0.00     0.23       0.00     1.13
    36   5.8761      0.00     0.20       0.00     1.05
    37  15.9627      0.00    -0.23       0.00     0.02
    38  16.0170      0.00    -0.10       0.00     0.22
    39  16.9947      0.00    -0.42       0.00     0.31
    40  17.1285      0.00    -0.07       0.00    -0.48
    41  17.8902      0.00     0.09       0.00    -0.08
    42  17.8902      0.00     0.05       0.00    -0.05
    43  17.8902      0.00     0.09       0.00    -0.16
    44  18.0211      0.00     0.12       0.00    -0.45
    45  18.0240      0.00     0.13       0.00     0.11
    46  18.0432      0.00    -0.02       0.00    -0.28
    47  19.1019      0.00     0.01       0.00    -0.01
    48  19.1021      0.00    -0.09       0.00    -0.16
    49  19.1024      0.00     0.05       0.00    -0.13
    50  21.1251      0.00     0.18       0.00     0.11
    51  21.1253      0.00     0.11       0.00    -0.12
    52  21.1254      0.00     0.17       0.00    -0.02

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.

118698    quality flag:3

Type:         7:4EEE    7:4EEE    7:4EEE

axisobj        43.645    43.645    43.645
ecceobj         0.235     0.235     0.235
incobj         11.226    11.226    11.226
qmin           31.351    31.237    31.155
qmax           56.783    56.863    56.900
amean          43.726    43.726    43.726
amin           43.240    43.255    43.264
amax           44.272    44.287    44.294
emean           0.229     0.229     0.229
emin            0.158     0.158     0.158
emax            0.283     0.285     0.286
imean          12.630    12.584    12.632
imin            9.727     9.159     8.965
imax           15.473    15.491    15.489
excite_mean     0.320     0.320     0.320
fracstop        1.000     1.000     1.000
cjmean          2.974     2.974     2.975

libcent 0       180.5     181.1     179.6
libamp  0       104.6     104.2     103.6
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       137.7     117.3     112.4
kozaiamp         88.4      78.3      71.7