Orbit Fit and Astrometric record for 04FU148

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: 04FU148   
# Created Thu Oct 19 01:37:29 2017
# Orbit generated from Bernstein formalism
# Fitting   25 observations of   26
# Arc:  12.23y
# First observation: 2004/03/16
#  Last observation: 2016/06/08
Preliminary a, adot, b, bdot, g, gdot:
  -0.006605   0.035197  -0.001540   0.010409   0.026817   0.000000
# WARNING -- MRQMIN stopped after  19 iterations
# Chi-squared of fit:    28.34 DOF:   44 RMS:  0.19
# Min/Max residuals:    -0.37    0.38
# Exact a, adot, b, bdot, g, gdot:
  1.737615E-05  3.133162E-02  4.918369E-06  9.130981E-03  2.942781E-02 -6.021557E-03
# Covariance matrix:
  3.7908E-13 -9.8160E-14  3.6509E-14 -3.0381E-14  2.2868E-13 -2.3401E-13
 -9.8160E-14  5.9662E-14 -2.0986E-14  1.8374E-14 -2.6190E-14  1.4076E-13
  3.6509E-14 -2.0986E-14  9.9104E-14 -1.7794E-14  1.4681E-14 -5.2862E-14
 -3.0381E-14  1.8374E-14 -1.7794E-14  9.3535E-15 -1.0903E-14  4.6117E-14
  2.2868E-13 -2.6190E-14  1.4681E-14 -1.0903E-14  2.4387E-13 -8.5087E-14
 -2.3401E-13  1.4076E-13 -5.2862E-14  4.6117E-14 -8.5087E-14  3.5343E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.358054 -150.161699    0.549229    0.048367   -0.823549  2453080.878083
# Heliocentric elements and errors
Epoch:              2453080.5000  =  2004/03/16
Mean Anomaly:          313.64235 +/-     0.009
Argument of Peri:       80.86528 +/-     0.014
Long of Asc Node:      197.86822 +/-     0.000
Inclination:            16.62563 +/-     0.000
Eccentricity:         0.22914803 +/-    0.0000
Semi-Major Axis:     39.71163006 +/-    0.0033
Time of Perihelion: 2464850.9737 +/-       1.9
Perihelion:          30.61178829 +/-    0.0028
Aphelion:            48.81147183 +/-    0.0042
Period (y)              250.2562 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -30.41831511 +/-    0.0005
Ecliptic Y          -16.81078687 +/-    0.0003
Ecliptic Z            1.99067698 +/-    0.0000
Ecliptic XDOT         0.00197517 +/-    0.0000
Ecliptic YDOT        -0.00223231 +/-    0.0000
Ecliptic ZDOT         0.00081538 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.81148150 +/-    0.0005
Geocenter to KBO     33.98145786 +/-    0.0006
# Hcoef:  6.70

The following table shows the complete astrometric record for 04FU148. 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 (04FU148) followed by the observatory code and reference code for the source of the astrometry.

2004 03  16.37734  13 55 48.00   -08 16 11.1   22.2R 04FU148   695  Ck9978      
2004 03  16.46878  13 55 47.62   -08 16 08.3         04FU148   695  Ck9978      
2004 04  22.47003  13 52 43.95   -07 54 38.3   21.8R 04FU148   568  Ck9978      
2004 04  22.53061  13 52 43.63   -07 54 36.0         04FU148   568  Ck9978      
2004 07  15.07497  13 48 22.52   -07 28 21.4   21.4R 04FU148   807  Cl0713      
2004 07  16.07452  13 48 23.10   -07 28 25.5         04FU148   807  Cl0713      
2004 07  16.99466  13 48 23.74   -07 28 30.3         04FU148   807  Cl0713      
2005 04  12.35153  14 01 16.71   -08 08 52.8   21.7R 04FU148   695  Cn5357      
2005 04  12.44812  14 01 16.18   -08 08 49.6         04FU148   695  Cn5357      
2005 05  09.18450  13 58 54.15   -07 53 38.3   21.2R 04FU148   807  Cn5357      
2005 05  10.17891  13 58 49.11   -07 53 07.4         04FU148   807  Cn5357      
2005 05  10.26375  13 58 48.64   -07 53 04.7         04FU148   807  Cn5357      
2005 05  10.32121  13 58 48.38   -07 53 03.0         04FU148   807  Cn5357      
2005 08  08.00202  13 56 23.89   -07 40 38.0   21.3R 04FU148   807  Co3966      
2005 08  09.00986  13 56 26.79   -07 40 55.7         04FU148   807  Co3967      
2005 08  10.00274  13 56 29.74   -07 41 13.8         04FU148   807  Co3967      
2007 04  21.12000  14 16 06.26   -08 18 54.9   21.2R 04FU148   807  Cv1534      
2007 04  22.24410  14 16 00.13   -08 18 15.9         04FU148   807  Cv1534      
2007 04  22.30741  14 15 59.81   -08 18 13.6         04FU148   807  Cv1534      
2007 05  12.30042  14 14 11.72   -08 07 18.7   22.2R 04FU148   688  Cv0131      
2007 05  12.34660  14 14 11.47   -08 07 17.0         04FU148   688  Cv0131      
2009 03  24.43529  14 34 17.95   -08 47 12.8   22.4R 04FU148   688  C~05Wt      
2009 03  24.47997  14 34 17.79   -08 47 11.2         04FU148   688  C~05Wt      
2016 06  08.20842  15 26 28.752  -08 35 34.95  21.8R 04FU148   G37              
2016 06  08.23298  15 26 28.622  -08 35 34.37        04FU148   G37              
2016 06  08.27342  15 26 28.384  -08 35 33.68        04FU148   G37              

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    -0.11       0.00    -0.00
  2   0.0003     -6.26     0.02       0.66    -0.09
  3   0.1016  -3012.97    -0.37     255.82     0.10
  4   0.1017  -3018.23    -0.31     256.31     0.31
  5   0.3305  -7208.16     0.07     365.59     0.20
  6   0.3332  -7198.63    -0.05     364.79     0.38
  7   0.3357  -7188.02     0.09     363.66     0.13
  8   1.0732   4425.49     0.38    2105.18     0.19
  9   1.0734   4417.00     0.31    2105.46    -0.10
 10   1.1466   2121.64    -0.05    2229.94    -0.10
 11   1.1494   2040.68     0.13    2232.94    -0.04
 12   1.1496   2033.19    -0.36    2233.05    -0.15
 13   1.1497   2028.97     0.14    2233.30    -0.05
 14   1.3953   -243.67     0.13    2185.26    -0.01
 15   1.3980   -197.09     0.05    2183.68     0.02
 16   1.4008   -149.68    -0.11    2181.99    -0.13
 17   3.0958  17087.80     0.24    6058.18    -0.29
 18   3.0989  16988.29     0.26    6064.18    -0.28
 19   3.0991  16983.00 (   0.66)   6064.74 (  -0.03)
 20   3.1538  15240.18    -0.07    6138.23    -0.22
 21   3.1539  15236.09    -0.23    6138.58     0.03
 22   5.0214  33194.30    -0.24    9888.18    -0.17
 23   5.0215  33191.47     0.13    9888.92     0.10
 24  12.2295  80993.38     0.14   26171.60    -0.01
 25  12.2296  80991.04     0.10   26171.54     0.17
 26  12.2297  80986.87    -0.28   26171.04     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.

04FU148    quality flag:3

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

axisobj        39.318    39.327    39.308
ecceobj         0.227     0.227     0.227
incobj         16.701    16.701    16.701
qmin           28.356    28.449    28.300
qmax           51.198    51.110    51.211
amean          39.455    39.455    39.455
amin           38.994    38.992    39.009
amax           39.995    40.010    39.996
emean           0.246     0.244     0.247
emin            0.205     0.205     0.208
emax            0.281     0.277     0.282
imean          15.986    16.081    15.900
imin           14.717    14.954    14.527
imax           17.230    17.195    17.266
excite_mean     0.370     0.370     0.370
fracstop        1.000     1.000     1.000
cjmean          2.896     2.895     2.896

libcent 0       181.1     180.3     179.7
libamp  0        90.4      94.0      86.0
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        86.8      86.8      87.0
kozaiamp         31.4      31.4      31.4