Orbit Fit and Astrometric record for 03WU188

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: 03WU188   
# Created Mon Oct 23 01:37:27 2017
# Orbit generated from Bernstein formalism
# Fitting   23 observations of   23
# Arc:  12.31y
# First observation: 2003/11/21
#  Last observation: 2016/03/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000037   0.022799  -0.000004   0.001488   0.023646   0.000000
# Chi-squared of fit:    49.29 DOF:   40 RMS:  0.26
# Min/Max residuals:    -0.48    0.50
# Exact a, adot, b, bdot, g, gdot:
  1.571772E-05  2.288562E-02  2.062770E-07  1.494407E-03  2.367503E-02  1.008145E-03
# Covariance matrix:
  1.7675E-13 -3.0173E-14  1.8863E-15 -1.9260E-15  9.4389E-14 -1.2519E-13
 -3.0173E-14  4.4071E-14 -2.4546E-15  2.7067E-15  3.7898E-14  1.6227E-13
  1.8863E-15 -2.4546E-15  1.0476E-13 -1.3927E-14 -9.0581E-16 -1.0872E-14
 -1.9260E-15  2.7067E-15 -1.3927E-14  4.8768E-15  1.2588E-15  1.1853E-14
  9.4389E-14  3.7898E-14 -9.0581E-16  1.2588E-15  2.2239E-13  5.9059E-14
 -1.2519E-13  1.6227E-13 -1.0872E-14  1.1853E-14  5.9059E-14  7.1920E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.505398   92.324821    0.551289    0.007279   -0.818699  2452964.921013
# Heliocentric elements and errors
Epoch:              2452960.5000  =  2003/11/17
Mean Anomaly:           43.10517 +/-     0.055
Argument of Peri:      321.10201 +/-     0.061
Long of Asc Node:       84.05458 +/-     0.001
Inclination:             3.77159 +/-     0.000
Eccentricity:         0.04102252 +/-    0.0001
Semi-Major Axis:     44.35566346 +/-    0.0034
Time of Perihelion: 2440040.9049 +/-      16.5
Perihelion:          42.53608224 +/-    0.0040
Aphelion:            46.17524468 +/-    0.0043
Period (y)              295.4145 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -1.19961427 +/-    0.0000
Ecliptic Y           43.04566702 +/-    0.0008
Ecliptic Z            0.37258202 +/-    0.0000
Ecliptic XDOT        -0.00265354 +/-    0.0000
Ecliptic YDOT         0.00000144 +/-    0.0000
Ecliptic ZDOT         0.00017400 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.06399124 +/-    0.0008
Geocenter to KBO     42.23858648 +/-    0.0008
# Hcoef:  5.77

The following table shows the complete astrometric record for 03WU188. 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 (03WU188) followed by the observatory code and reference code for the source of the astrometry.

2003 11  21.42027  06 10 10.41   +23 55 27.0   21.7R 03WU188   695  Cj8808      
2003 11  21.52618  06 10 09.95   +23 55 27.2         03WU188   695  Cj8808      
2003 11  24.40778  06 09 57.42   +23 55 33.8   21.7R 03WU188   695  Cj6642      
2003 11  24.51024  06 09 56.98   +23 55 34.2         03WU188   695  Cj6642      
2004 01  11.18200  06 05 54.93   +23 57 03.6   21.9R 03WU188   688  Cj6642      
2004 01  11.22058  06 05 54.76   +23 57 03.8         03WU188   688  Cj6642      
2004 01  11.27889  06 05 54.44   +23 57 03.7         03WU188   688  Cj6642      
2004 02  26.13452  06 03 12.44   +23 57 36.6   22.3R 03WU188   695  Ck0875      
2004 02  26.27019  06 03 12.20   +23 57 36.4         03WU188   695  Ck0875      
2004 09  17.58029  06 17 24.47   +23 56 32.7   22.0R 03WU188   568  Cm6785      
2004 09  17.61481  06 17 24.54   +23 56 32.3         03WU188   568  Cm6785      
2005 02  09.15398  06 09 34.81   +24 01 42.8   21.6R 03WU188   688  Cm6785      
2005 02  09.26702  06 09 34.43   +24 01 43.0         03WU188   688  Cm6785      
2006 12  20.20368  06 25 05.04   +24 05 06.3   22.2R 03WU188   250  S~06Ag      
2006 12  20.20808  06 25 05.01   +24 05 06.3         03WU188   250  S~06Ag      
2006 12  20.21248  06 25 04.99   +24 05 06.3         03WU188   250  S~06Ag      
2006 12  20.21687  06 25 04.97   +24 05 06.3         03WU188   250  S~06Ag      
2009 02  26.12178  06 31 35.30   +24 11 09.0   20.5R 03WU188   688  C~04qA      
2009 02  26.21967  06 31 35.09   +24 11 08.6         03WU188   688  C~04qA      
2011 03  10.03085  06 42 34.08   +24 11 17.4         03WU188   809  C~0TUz      
2011 03  10.10776  06 42 33.96   +24 11 17.4         03WU188   809  C~0TUz      
2016 03  13.14318  07 10 36.56   +23 57 48.0   22.5R 03WU188   G37  C~1pPj      
2016 03  13.24009  07 10 36.38   +23 57 48.1         03WU188   G37  C~1pPj      

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    -0.09       0.00     0.16
  2   0.0003     -6.31    -0.11       0.09     0.14
  3   0.0082   -178.20    -0.28       3.69     0.16
  4   0.0085   -184.24     0.02       3.98     0.35
  5   0.1390  -3503.92     0.17      47.96     0.21
  6   0.1391  -3506.25     0.50      48.14     0.36
  7   0.1392  -3510.64     0.14      48.00     0.18
  8   0.2648  -5732.64    -0.01      63.79    -0.09
  9   0.2652  -5735.93    -0.16      63.57    -0.30
 10   0.8245   5949.39    -0.34     208.88     0.42
 11   0.8246   5950.36    -0.16     208.51    -0.02
 12   1.2204   -494.29    -0.18     367.39    -0.20
 13   1.2207   -499.50    -0.28     367.50    -0.10
 14   3.0795  12249.21     0.32     958.54    -0.42
 15   3.0795  12248.79     0.23     958.53    -0.44
 16   3.0795  12248.52     0.27     958.51    -0.46
 17   3.0795  12248.25     0.31     958.50    -0.48
 18   5.2668  17594.94     0.02    1590.37     0.24
 19   5.2671  17592.07     0.19    1589.80    -0.27
 20   7.2980  26694.84    -0.24    2197.29     0.12
 21   7.2983  26693.17    -0.42    2197.17     0.08
 22  12.3086  50532.21     0.20    3758.61     0.20
 23  12.3089  50529.60    -0.12    3758.39     0.14

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.

03WU188    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.409    44.419    44.399
ecceobj         0.045     0.046     0.045
incobj          3.767     3.767     3.767
qmin           41.299    41.323    41.256
qmax           47.282    47.296    47.263
amean          44.190    44.200    44.180
amin           43.848    43.856    43.840
amax           44.543    44.556    44.546
emean           0.046     0.047     0.046
emin            0.031     0.032     0.031
emax            0.062     0.062     0.061
imean           2.106     2.106     2.106
imin            1.437     1.440     1.434
imax            2.710     2.710     2.711
excite_mean     0.060     0.060     0.060
fracstop        1.000     1.000     1.000
cjmean          3.100     3.100     3.099

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       168.0     167.5     168.0
kozaiamp        180.0     180.0     180.0