Orbit Fit and Astrometric record for 118228

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: 118228    
# Created Wed Oct 18 01:36:28 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   56 observations of   56
# Arc:  17.08y
# First observation: 1996/10/08
#  Last observation: 2013/11/06
# Chi-squared of fit:   183.17 DOF:  106 RMS:  0.32
# Min/Max residuals:    -0.86    0.81
# Exact a, adot, b, bdot, g, gdot:
  1.698797E-05  3.262886E-02  3.423046E-06  8.218441E-03  2.973058E-02 -8.841947E-05
# 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
    3.976001   25.980586    0.174636    0.067803   -0.977590  2450364.897280
# Heliocentric elements and errors
Epoch:              2450364.5000  =  1996/10/08
Mean Anomaly:          357.73513 +/-     0.000
Argument of Peri:       18.38096 +/-     0.000
Long of Asc Node:       10.70318 +/-     0.000
Inclination:            14.64678 +/-     0.000
Eccentricity:         0.12407251 +/-    0.0000
Semi-Major Axis:     39.51326565 +/-    0.0000
Time of Perihelion: 2450935.2591 +/-       0.0
Perihelion:          34.61075566 +/-    0.0000
Aphelion:            44.41577564 +/-    0.0000
Period (y)              248.3834 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           31.12630390 +/-    0.0000
Ecliptic Y           14.96538359 +/-    0.0000
Ecliptic Z            2.33236499 +/-    0.0000
Ecliptic XDOT        -0.00136411 +/-    0.0000
Ecliptic YDOT         0.00267924 +/-    0.0000
Ecliptic ZDOT         0.00075426 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.61574297 +/-    0.0000
Geocenter to KBO     33.63543863 +/-    0.0000
# Hcoef:  7.12

The following table shows the complete astrometric record for 118228. 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 (118228) followed by the observatory code and reference code for the source of the astrometry.

1996 10  08.39656  01 30 25.00   +13 44 10.0   22.5R 118228    568  C30144      
1996 10  08.40454  01 30 24.95   +13 44 09.8         118228    568  C30144      
1996 10  08.41251  01 30 24.91   +13 44 09.6         118228    568  C30144      
1996 10  12.37903  01 30 02.47   +13 42 24.2         118228    568  C30144      
1996 10  12.39328  01 30 02.40   +13 42 24.1         118228    568  C30144      
1996 10  12.40867  01 30 02.30   +13 42 23.5         118228    568  C30144      
1996 10  12.43983  01 30 02.20   +13 42 22.5         118228    568  C30144      
1996 10  12.49096  01 30 01.82   +13 42 21.0         118228    568  C30144      
1996 10  12.50351  01 30 01.76   +13 42 20.8         118228    568  C30144      
1996 11  17.22662  01 26 49.12   +13 25 40.4         118228    696  C30195      
1996 11  17.33679  01 26 48.59   +13 25 37.7         118228    696  C30195      
1996 11  18.21788  01 26 44.53   +13 25 14.6   21.6R 118228    696  C30195      
1996 11  18.32149  01 26 44.02   +13 25 11.5         118228    696  C30195      
1997 07  11.42666  01 40 35.77   +14 55 51.6         118228    696  C30195      
1997 07  12.41263  01 40 37.64   +14 56 14.3   21.2R 118228    696  C30195      
1997 07  12.46436  01 40 37.77   +14 56 15.4   21.3R 118228    696  C30195      
1997 07  13.41230  01 40 39.44   +14 56 36.0   21.5R 118228    696  C30195      
1997 09  08.47421  01 39 24.25   +15 01 10.1         118228    675  C30579      
1997 09  08.52029  01 39 24.05   +15 01 09.7         118228    675  C30579      
1997 11  08.30400  01 34 01.73   +14 37 17.5   22.5R 118228    696  Ca0191      
1997 11  08.36184  01 34 01.42   +14 37 15.8         118228    696  Ca0191      
1998 10  17.34276  01 42 39.51   +15 54 28.9         118228    705  Ca2543      
1998 10  17.37526  01 42 39.32   +15 54 27.9         118228    705  Ca2543      
1998 10  17.41988  01 42 39.09   +15 54 26.9         118228    705  Ca2543      
1998 10  18.34292  01 42 33.76   +15 54 02.9         118228    705  Ca2543      
1998 10  18.40184  01 42 33.41   +15 54 01.6         118228    705  Ca2543      
1998 11  25.07705  01 39 11.64   +15 36 40.4   22.5R 118228    711  Ca3585      
1998 11  25.11509  01 39 11.46   +15 36 39.4   22.4R 118228    711  Ca3585      
1998 11  25.12869  01 39 11.41   +15 36 39.1   22.4R 118228    711  Ca3585      
1998 11  25.15631  01 39 11.26   +15 36 38.6   22.5R 118228    711  Ca3585      
1998 11  25.16999  01 39 11.21   +15 36 38.0   22.4R 118228    711  Ca3585      
1998 11  25.20528  01 39 11.06   +15 36 37.1   22.4R 118228    711  Ca3585      
1998 11  25.21941  01 39 10.98   +15 36 36.9   22.1R 118228    711  Ca3585      
1998 11  25.24463  01 39 10.87   +15 36 36.0   22.3R 118228    711  Ca3585      
1998 11  25.25841  01 39 10.83   +15 36 35.8   22.3R 118228    711  Ca3585      
1998 11  25.27168  01 39 10.74   +15 36 35.4   22.3R 118228    711  Ca3585      
1998 11  25.30573  01 39 10.62   +15 36 34.6   22.8R 118228    711  Ca3585      
1999 11  10.18669  01 47 02.70   +16 49 45.3         118228    696  Ca7269      
1999 11  10.23222  01 47 02.45   +16 49 44.7         118228    696  Ca7269      
1999 11  10.28375  01 47 02.16   +16 49 43.2         118228    696  Ca7269      
1999 11  11.12043  01 46 57.63   +16 49 19.9   22.4  118228    696  Ca7269      
1999 11  11.16523  01 46 57.36   +16 49 18.5         118228    696  Ca7269      
2005 09  30.36639  02 32 11.98   +23 20 04.6   22.4R 118228    688  Co3236      
2005 09  30.45773  02 32 11.53   +23 20 03.5         118228    688  Co3236      
2005 11  04.394033 02 28 50.69   +23 09 40.8   21.8V 118228    645  C~1RvP      
2005 11  04.394862 02 28 50.69   +23 09 40.7   21.1V 118228    645  C~1RvP      
2005 11  04.397350 02 28 50.68   +23 09 40.7   24.4V 118228    645  C~1RvP      
2005 12  06.298876 02 25 51.18   +22 55 34.6   22.3V 118228    645  C~1RvP      
2005 12  06.299705 02 25 51.18   +22 55 34.6   22.0V 118228    645  C~1RvP      
2005 12  06.302193 02 25 51.17   +22 55 34.6   23.2V 118228    645  C~1RvP      
2008 09  26.44407  02 54 15.90   +26 09 25.6   24.6R 118228    250  S~06HA      
2008 09  26.45101  02 54 15.87   +26 09 25.6         118228    250  S~06HA      
2008 09  26.45726  02 54 15.85   +26 09 25.7         118228    250  S~06HA      
2008 09  26.46421  02 54 15.81   +26 09 25.6         118228    250  S~06HA      
2013 11  06.35148  03 28 55.56   +30 16 22.2   22.1R 118228    G37  C~0z14      
2013 11  06.44081  03 28 54.99   +30 16 21.1         118228    G37  C~0z14      

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    -0.27       0.00    -0.58
  2   0.0000      0.00    -0.01       0.00     0.24
  3   0.0000      0.00     0.08       0.00     0.24
  4   0.0109      0.00    -0.41       0.00     0.25
  5   0.0109      0.00    -0.22       0.00     0.54
  6   0.0110      0.00    -0.39       0.00     0.35
  7   0.0111      0.00     0.81       0.00     0.19
  8   0.0112      0.00    -0.45       0.00     0.08
  9   0.0112      0.00    -0.27       0.00     0.22
 10   0.1090      0.00     0.06       0.00    -0.10
 11   0.1094      0.00    -0.06       0.00     0.10
 12   0.1118      0.00     0.03       0.00    -0.01
 13   0.1120      0.00    -0.35       0.00    -0.41
 14   0.7557      0.00    -0.86       0.00     0.33
 15   0.7584      0.00    -0.35       0.00     0.39
 16   0.7586      0.00     0.25       0.00     0.30
 17   0.7612      0.00     0.34       0.00    -0.31
 18   0.9174      0.00     0.29       0.00     0.58
 19   0.9175      0.00     0.15       0.00     0.75
 20   1.0839      0.00     0.48       0.00    -0.38
 21   1.0841      0.00     0.48       0.00    -0.44
 22   2.0231      0.00    -0.39       0.00    -0.63
 23   2.0232      0.00    -0.39       0.00    -0.77
 24   2.0233      0.00     0.07       0.00    -0.58
 25   2.0259      0.00    -0.14       0.00    -0.16
 26   2.0260      0.00    -0.21       0.00     0.12
 27   2.1292      0.00     0.31       0.00    -0.21
 28   2.1293      0.00     0.19       0.00    -0.24
 29   2.1293      0.00     0.36       0.00    -0.19
 30   2.1294      0.00    -0.01       0.00     0.01
 31   2.1294      0.00     0.17       0.00    -0.24
 32   2.1295      0.00     0.33       0.00    -0.23
 33   2.1296      0.00     0.09       0.00    -0.07
 34   2.1296      0.00     0.15       0.00    -0.32
 35   2.1297      0.00     0.48       0.00    -0.16
 36   2.1297      0.00     0.03       0.00    -0.22
 37   2.1298      0.00     0.53       0.00    -0.14
 38   3.0877      0.00     0.24       0.00    -0.33
 39   3.0878      0.00     0.27       0.00     0.35
 40   3.0880      0.00     0.21       0.00     0.31
 41   3.0903      0.00     0.16       0.00     0.63
 42   3.0904      0.00    -0.21       0.00     0.48
 43   8.9773      0.00     0.11       0.00     0.37
 44   8.9776      0.00     0.24       0.00     0.16
 45   9.0732      0.00     0.27       0.00    -0.04
 46   9.0732      0.00     0.35       0.00    -0.12
 47   9.0732      0.00     0.43       0.00    -0.06
 48   9.1606      0.00    -0.24       0.00    -0.23
 49   9.1606      0.00    -0.18       0.00    -0.21
 50   9.1606      0.00    -0.15       0.00    -0.14
 51  11.9673      0.00    -0.00       0.00     0.01
 52  11.9673      0.00    -0.00       0.00     0.03
 53  11.9673      0.00     0.10       0.00     0.14
 54  11.9673      0.00    -0.05       0.00     0.05
 55  17.0786      0.00    -0.14       0.00     0.21
 56  17.0788      0.00     0.07       0.00     0.34

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.

118228    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.785    39.785    39.785
ecceobj         0.130     0.130     0.130
incobj         14.630    14.630    14.630
qmin           34.010    34.010    34.010
qmax           45.177    45.177    45.177
amean          39.458    39.458    39.458
amin           39.154    39.154    39.154
amax           39.794    39.794    39.794
emean           0.109     0.109     0.109
emin            0.084     0.084     0.084
emax            0.137     0.137     0.137
imean          14.811    14.811    14.811
imin           14.128    14.128    14.127
imax           15.458    15.458    15.457
excite_mean     0.278     0.278     0.278
fracstop        1.000     1.000     1.000
cjmean          2.963     2.963     2.963

libcent 0       179.5     179.5     179.5
libamp  0        30.3      30.3      30.3
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       181.4     181.3     181.4
kozaiamp        180.0     180.0     180.0