Orbit Fit and Astrometric record for 160148

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: 160148    
# Created Tue Dec 12 02:36:41 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   17 observations of   17
# Arc:   5.96y
# First observation: 2001/05/24
#  Last observation: 2007/05/08
# Chi-squared of fit:    50.04 DOF:   28 RMS:  0.30
# Min/Max residuals:    -0.52    0.86
# Exact a, adot, b, bdot, g, gdot:
  1.483667E-05  2.900340E-02 -6.340120E-06 -7.966637E-03  2.614009E-02 -9.269709E-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
    0.435686 -142.574611   -0.438296    0.006879   -0.919966  2452053.550933
# Heliocentric elements and errors
Epoch:              2452054.5000  =  2001/05/25
Mean Anomaly:          344.01137 +/-     0.000
Argument of Peri:      229.24098 +/-     0.000
Long of Asc Node:       39.61280 +/-     0.000
Inclination:            15.35245 +/-     0.000
Eccentricity:         0.50154432 +/-    0.0000
Semi-Major Axis:     68.91074136 +/-    0.0000
Time of Perihelion: 2461334.2759 +/-       0.0
Perihelion:          34.34895030 +/-    0.0000
Aphelion:           103.47253243 +/-    0.0000
Period (y)              572.0561 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -30.83994307 +/-    0.0000
Ecliptic Y          -24.15047772 +/-    0.0000
Ecliptic Z            0.29064358 +/-    0.0000
Ecliptic XDOT         0.00260368 +/-    0.0000
Ecliptic YDOT        -0.00182398 +/-    0.0000
Ecliptic ZDOT        -0.00084157 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.17203349 +/-    0.0000
Geocenter to KBO     38.25567757 +/-    0.0000
# Hcoef:  7.66

The following table shows the complete astrometric record for 160148. 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 (160148) followed by the observatory code and reference code for the source of the astrometry.

2001 05  24.05019  14 20 52.58   -13 34 38.2   23.3R 160148    807  Cd1817      
2001 05  24.15877  14 20 52.10   -13 34 36.2         160148    807  Cd1817      
2001 06  10.00885  14 19 44.98   -13 30 26.3   24.0R 160148    304  Cd1817      
2001 06  10.08296  14 19 44.70   -13 30 25.1         160148    304  Cd1817      
2002 04  06.22513  14 30 44.06   -14 48 21.2   22.8R 160148    807  Cf4617      
2002 04  06.36489  14 30 43.37   -14 48 18.8         160148    807  Cf4617      
2002 04  07.34579  14 30 38.91   -14 48 02.3         160148    807  Cf4617      
2002 04  11.34306  14 30 20.19   -14 46 51.6   22.7R 160148    695  Cg5781      
2002 04  11.40050  14 30 19.92   -14 46 50.5         160148    695  Cg5781      
2003 04  30.52476  14 34 53.72   -15 39 45.5   23.4R 160148    568  Ch9866      
2003 05  01.43758  14 34 49.02   -15 39 27.9         160148    568  Ch9866      
2003 05  01.50058  14 34 48.67   -15 39 26.7         160148    568  Ch9866      
2007 04  21.19436  15 02 02.20   -19 40 58.9   22.3R 160148    807  Cv1520      
2007 04  22.26350  15 01 56.70   -19 40 43.0         160148    807  Cv1520      
2007 04  22.33045  15 01 56.38   -19 40 42.2         160148    807  Cv1520      
2007 05  08.25575  15 00 31.30   -19 36 24.9   23.5R 160148    304  Cu8806      
2007 05  08.29814  15 00 31.07   -19 36 24.2         160148    304  Cu8806      

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    -0.23       0.00     0.73
  2   0.0003      0.00     0.86       0.00     0.24
  3   0.0464      0.00    -0.26       0.00     0.09
  4   0.0466      0.00    -0.52       0.00     0.39
  5   0.8684      0.00     0.26       0.00     0.11
  6   0.8688      0.00    -0.36       0.00     0.11
  7   0.8714      0.00     0.11       0.00    -0.30
  8   0.8824      0.00    -0.05       0.00    -0.29
  9   0.8825      0.00     0.07       0.00    -0.24
 10   1.9342      0.00    -0.00       0.00    -0.15
 11   1.9367      0.00    -0.02       0.00    -0.24
 12   1.9369      0.00    -0.31       0.00    -0.26
 13   5.9087      0.00    -0.30       0.00    -0.03
 14   5.9116      0.00    -0.15       0.00     0.19
 15   5.9118      0.00     0.32       0.00    -0.01
 16   5.9554      0.00     0.27       0.00     0.06
 17   5.9555      0.00     0.33       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.

160148    quality flag:3

Type:       7:2EEEEE  7:2EEEEE  7:2EEEEE

axisobj        68.853    68.853    68.854
ecceobj         0.502     0.502     0.502
incobj         15.364    15.364    15.364
qmin           33.364    33.388    33.367
qmax          107.539   107.842   107.863
amean          69.409    69.408    69.408
amin           68.331    68.351    68.283
amax           70.965    70.902    70.983
emean           0.505     0.505     0.505
emin            0.492     0.492     0.492
emax            0.518     0.521     0.520
imean          14.706    14.710    14.703
imin           13.876    13.863    13.881
imax           15.369    15.368    15.370
excite_mean     0.565     0.565     0.565
fracstop        1.000     1.000     1.000
cjmean          2.969     2.969     2.969

libcent 0       180.8     180.0     179.3
libamp  0       112.0     110.3     111.9
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       250.5     252.1     249.4
kozaiamp        180.0     180.0     180.0