Orbit Fit and Astrometric record for 496315

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: 496315    
# Created Sun Oct 22 01:36:54 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   31 observations of   31
# Arc:   4.29y
# First observation: 2013/02/08
#  Last observation: 2017/05/24
# Chi-squared of fit:    25.25 DOF:   56 RMS:  0.16
# Min/Max residuals:    -0.23    1.02
# Exact a, adot, b, bdot, g, gdot:
  1.535197E-05  2.161570E-02  9.582996E-06  1.419377E-02  2.211567E-02 -7.249145E-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
    1.489937 -145.842561    0.948692    0.007020   -0.267847  2456332.068818
# Heliocentric elements and errors
Epoch:              2456332.5000  =  2013/02/09
Mean Anomaly:          355.29163 +/-     0.000
Argument of Peri:       42.51417 +/-     0.000
Long of Asc Node:      210.72869 +/-     0.000
Inclination:            33.58093 +/-     0.000
Eccentricity:         0.72434924 +/-    0.0000
Semi-Major Axis:    148.94463387 +/-    0.0000
Time of Perihelion: 2465016.1870 +/-       0.0
Perihelion:          41.05670078 +/-    0.0000
Aphelion:           256.83256695 +/-    0.0000
Period (y)             1817.7975 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -38.15710108 +/-    0.0000
Ecliptic Y          -24.74271540 +/-    0.0000
Ecliptic Z            1.17612677 +/-    0.0000
Ecliptic XDOT         0.00227643 +/-    0.0000
Ecliptic YDOT        -0.00168404 +/-    0.0000
Ecliptic ZDOT         0.00173335 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.49254967 +/-    0.0000
Geocenter to KBO     45.21706426 +/-    0.0000
# Hcoef:  6.68

The following table shows the complete astrometric record for 496315. 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 (496315) followed by the observatory code and reference code for the source of the astrometry.

2013 02  08.56804  14 09 40.000  -11 30 08.47  23.5r 496315    568  C~1WkW      
2013 02  08.62754  14 09 39.986  -11 30 07.87  23.1r 496315    568  C~1WkW      
2013 04  04.42583  14 07 32.880  -11 09 38.81  22.9r 496315    568  C~1WkW      
2013 04  04.46629  14 07 32.721  -11 09 37.64  23.2r 496315    568  C~1WkW      
2013 04  04.50656  14 07 32.568  -11 09 36.49  23.1r 496315    568  C~1WkW      
2013 04  05.56132  14 07 28.532  -11 09 05.16  22.9r 496315    568  C~1WkW      
2013 04  05.56537  14 07 28.525  -11 09 04.98  22.7r 496315    568  C~1WkW      
2013 04  06.59893  14 07 24.542  -11 08 34.28  22.8r 496315    568  C~1WkW      
2013 04  08.39969  14 07 17.560  -11 07 40.32  23.2r 496315    568  C~1WkW      
2013 05  11.43388  14 05 04.514  -10 51 08.13  23.1r 496315    568  C~1WkW      
2013 06  13.26956  14 03 19.569  -10 37 47.51  23.2r 496315    568  C~1WkW      
2013 06  13.30999  14 03 19.491  -10 37 46.94  23.2r 496315    568  C~1WkW      
2013 07  04.29102  14 02 46.561  -10 32 36.08  23.3r 496315    568  C~1WkW      
2013 07  06.29852  14 02 45.147  -10 32 16.12  23.3r 496315    568  C~1WkW      
2014 02  27.63490  14 15 16.139  -11 03 28.52  22.7r 496315    568  C~1WkW      
2014 03  27.42459  14 14 01.981  -10 51 55.06  22.9r 496315    568  C~1WkW      
2014 03  27.44930  14 14 01.904  -10 51 54.55  23.0r 496315    568  C~1WkW      
2014 03  28.42582  14 13 58.502  -10 51 26.72  23.1r 496315    568  C~1WkW      
2014 04  05.39234  14 13 29.341  -10 47 33.41  23.3r 496315    568  C~1WkW      
2014 05  22.40950  14 10 22.419  -10 24 32.79  23.0r 496315    568  C~1WkW      
2014 05  28.38167  14 10 01.712  -10 22 02.60  23.2r 496315    568  C~1WkW      
2014 06  26.30928  14 08 49.366  -10 12 46.86  23.3r 496315    568  C~1WkW      
2014 07  18.27586  14 08 34.407  -10 09 35.90  23.3r 496315    568  C~1WkW      
2015 01  26.63780  14 21 25.977  -10 48 59.71  23.4r 496315    568  C~1WkW      
2016 05  29.35593  14 22 05.639  -09 35 57.77  23.2w 496315    568  C~2GtA      
2016 06  05.34098  14 21 42.686  -09 33 23.77  23.2w 496315    568  C~2GtA      
2017 01  31.64818  14 33 40.102  -10 02 05.93  23.2w 496315    568  C~2GtA      
2017 02  03.64476  14 33 42.595  -10 01 30.46        496315    568  C~2GtA      
2017 03  27.64094  14 32 25.580  -09 42 13.51        496315    568  C~2GtA      
2017 03  28.59333  14 32 22.406  -09 41 45.50        496315    568  C~2GtA      
2017 05  24.26566  14 28 36.798  -09 14 13.39  23.0w 496315    568  C~2GtA      

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    -0.16       0.00     1.02
  2   0.0002      0.00     0.20       0.00    -0.03
  3   0.1502      0.00    -0.02       0.00    -0.06
  4   0.1503      0.00    -0.06       0.00    -0.08
  5   0.1504      0.00    -0.01       0.00    -0.12
  6   0.1533      0.00    -0.07       0.00    -0.07
  7   0.1533      0.00     0.07       0.00    -0.01
  8   0.1561      0.00     0.03       0.00    -0.09
  9   0.1611      0.00     0.09       0.00    -0.01
 10   0.2515      0.00     0.11       0.00    -0.13
 11   0.3414      0.00    -0.22       0.00     0.19
 12   0.3415      0.00     0.05       0.00    -0.01
 13   0.3990      0.00     0.06       0.00    -0.07
 14   0.4045      0.00     0.07       0.00    -0.01
 15   1.0515      0.00    -0.03       0.00     0.04
 16   1.1276      0.00     0.01       0.00     0.16
 17   1.1277      0.00     0.16       0.00    -0.03
 18   1.1303      0.00     0.08       0.00    -0.09
 19   1.1522      0.00     0.00       0.00     0.06
 20   1.2809      0.00     0.19       0.00     0.00
 21   1.2972      0.00     0.05       0.00    -0.02
 22   1.3764      0.00     0.12       0.00    -0.04
 23   1.4366      0.00     0.04       0.00    -0.11
 24   1.9632      0.00    -0.20       0.00     0.05
 25   3.3013      0.00    -0.06       0.00     0.09
 26   3.3204      0.00     0.04       0.00    -0.03
 27   3.9783      0.00     0.06       0.00     0.07
 28   3.9865      0.00     0.05       0.00    -0.23
 29   4.1289      0.00    -0.01       0.00     0.01
 30   4.1315      0.00     0.08       0.00     0.01
 31   4.2866      0.00    -0.03       0.00    -0.05

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.

496315    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       147.533   147.530   147.537
ecceobj         0.722     0.722     0.722
incobj         33.638    33.638    33.638
qmin           38.737    38.620    38.698
qmax          273.690   273.216   274.184
amean         150.547   150.409   150.813
amin          146.804   146.650   146.733
amax          157.049   156.691   157.164
emean           0.731     0.731     0.731
emin            0.719     0.719     0.719
emax            0.743     0.744     0.745
imean          33.434    33.421    33.418
imin           32.874    32.858    32.859
imax           34.320    34.324    34.319
excite_mean     0.915     0.915     0.915
fracstop        1.000     1.000     1.000
cjmean          2.748     2.748     2.748

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        64.7      64.9      64.9
kozaiamp         22.6      22.8      23.1