Orbit Fit and Astrometric record for 160256

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: 160256    
# Created Thu Dec 14 02:36:38 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   21 observations of   21
# Arc:   6.88y
# First observation: 2000/08/25
#  Last observation: 2007/07/12
# Chi-squared of fit:   117.39 DOF:   36 RMS:  0.42
# Min/Max residuals:    -0.90    1.89
# Exact a, adot, b, bdot, g, gdot:
  1.602315E-05  2.038916E-02 -1.114508E-06 -8.433718E-04  2.251584E-02 -4.189490E-04
# 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
   -4.383637  -15.305615    0.222567   -0.075294   -0.980065  2451781.712863
# Heliocentric elements and errors
Epoch:              2451782.5000  =  2000/08/26
Mean Anomaly:          210.34284 +/-     0.000
Argument of Peri:       33.77084 +/-     0.000
Long of Asc Node:      103.64420 +/-     0.000
Inclination:             4.91099 +/-     0.000
Eccentricity:         0.05970587 +/-    0.0000
Semi-Major Axis:     43.13883615 +/-    0.0000
Time of Perihelion: 2494805.0413 +/-       0.0
Perihelion:          40.56319438 +/-    0.0000
Aphelion:            45.71447792 +/-    0.0000
Period (y)              283.3419 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           43.60774140 +/-    0.0000
Ecliptic Y          -12.15847640 +/-    0.0000
Ecliptic Z           -3.39475171 +/-    0.0000
Ecliptic XDOT         0.00059061 +/-    0.0000
Ecliptic YDOT         0.00241212 +/-    0.0000
Ecliptic ZDOT        -0.00009821 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.39812391 +/-    0.0000
Geocenter to KBO     44.41322735 +/-    0.0000
# Hcoef:  6.14

The following table shows the complete astrometric record for 160256. 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 (160256) followed by the observatory code and reference code for the source of the astrometry.

2000 08  25.21212  23 10 29.08   -10 04 05.5   22.9R 160256    807  Ci4046      
2000 08  25.27585  23 10 28.81   -10 04 07.6         160256    807  Ci4046      
2001 09  19.303912 23 13 12.4    -09 50 24.0   22.1V 160256    645 YC~1PzB      
2001 09  19.304741 23 13 12.3    -09 50 24.1   21.8V 160256    645 YC~1PzB      
2001 09  19.307229 23 13 12.2    -09 50 24.1   23.6V 160256    645 YC~1PzB      
2002 08  10.42509  23 20 19.35   -09 07 33.4   22.1R 160256    807  Cg3357      
2002 08  11.36606  23 20 16.07   -09 07 57.5         160256    807  Cg3357      
2002 08  11.42412  23 20 15.87   -09 07 59.1         160256    807  Cg3357      
2002 09  09.37564  23 18 21.29   -09 21 04.0   21.9R 160256    662  Cg3357      
2002 09  09.44907  23 18 20.98   -09 21 05.3         160256    662  Cg3357      
2003 08  23.26764  23 23 57.89   -08 47 58.2   22.0R 160256    807  Ci3361      
2003 08  23.34923  23 23 57.55   -08 48 00.5         160256    807  Ci3361      
2003 08  24.29352  23 23 53.86   -08 48 26.0         160256    807  Ci3361      
2004 11  03.0443   23 23 51.79   -08 49 35.2   22.1R 160256    809  Cl8391      
2007 05  22.19614  23 42 47.15   -06 48 07.8   23.9R 160256    250  S~06He      
2007 05  22.20309  23 42 47.17   -06 48 07.7         160256    250  S~06He      
2007 05  22.21003  23 42 47.18   -06 48 07.7         160256    250  S~06He      
2007 07  11.31772  23 43 27.11   -06 49 34.7         160256    304  Cv1978      
2007 07  11.41957  23 43 27.00   -06 49 36.2         160256    304  Cv1978      
2007 07  12.30139  23 43 25.92   -06 49 48.7         160256    304  Cv1978      
2007 07  12.42706  23 43 25.75   -06 49 50.5         160256    304  Cv1978      

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    -0.06       0.00    -0.61
  2   0.0002      0.00    -0.42       0.00    -0.38
  3   1.0680      0.00     1.89       0.00     0.27
  4   1.0680      0.00     0.44       0.00     0.19
  5   1.0680      0.00    -0.90       0.00     0.26
  6   1.9581      0.00     0.12       0.00     0.08
  7   1.9607      0.00     0.08       0.00     0.21
  8   1.9609      0.00     0.18       0.00     0.11
  9   2.0401      0.00    -0.15       0.00    -0.49
 10   2.0403      0.00    -0.09       0.00     0.19
 11   2.9926      0.00     0.25       0.00    -0.14
 12   2.9928      0.00    -0.01       0.00    -0.22
 13   2.9954      0.00    -0.05       0.00     0.09
 14   4.1912      0.00    -0.46       0.00     0.23
 15   6.7378      0.00    -0.32       0.00    -0.26
 16   6.7378      0.00    -0.30       0.00    -0.23
 17   6.7378      0.00    -0.44       0.00    -0.31
 18   6.8750      0.00     0.14       0.00     0.06
 19   6.8753      0.00     0.40       0.00     0.01
 20   6.8777      0.00     0.14       0.00     0.19
 21   6.8781      0.00     0.08       0.00     0.23

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.

160256    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.217    43.217    43.217
ecceobj         0.058     0.058     0.058
incobj          4.909     4.909     4.909
qmin           39.112    39.114    39.115
qmax           47.200    47.191    47.203
amean          43.029    43.029    43.029
amin           42.689    42.688    42.691
amax           43.396    43.395    43.393
emean           0.067     0.067     0.067
emin            0.048     0.048     0.048
emax            0.088     0.088     0.088
imean           3.300     3.300     3.300
imin            2.317     2.317     2.317
imax            4.362     4.362     4.362
excite_mean     0.088     0.088     0.088
fracstop        1.000     1.000     1.000
cjmean          3.081     3.081     3.081

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       179.1     179.2     179.0
kozaiamp        180.0     180.0     180.0