Orbit Fit and Astrometric record for 13JS64

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: 13JS64    
# Created Sat Dec 16 02:37:55 2017
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   20
# Arc:   3.16y
# First observation: 2013/04/09
#  Last observation: 2016/06/08
Preliminary a, adot, b, bdot, g, gdot:
  -0.000037   0.025245  -0.000000   0.002976   0.025110   0.000000
# Chi-squared of fit:     9.79 DOF:   34 RMS:  0.12
# Min/Max residuals:    -0.22    0.35
# Exact a, adot, b, bdot, g, gdot:
  1.674007E-05  2.511033E-02  1.657255E-06  2.954205E-03  2.508944E-02 -1.054512E-04
# Covariance matrix:
  2.8476E-13 -2.4130E-13  2.8721E-15 -4.0069E-14  2.6806E-13 -4.1338E-12
 -2.4130E-13  1.0602E-12 -3.1782E-14  1.7161E-13  5.3001E-14  1.8019E-11
  2.8721E-15 -3.1782E-14  1.0368E-13 -5.4888E-14 -8.2018E-15 -5.7176E-13
 -4.0069E-14  1.7161E-13 -5.4888E-14  1.1278E-13 -3.0248E-15  3.1891E-12
  2.6806E-13  5.3001E-14 -8.2018E-15 -3.0248E-15  5.3929E-13 -1.7640E-13
 -4.1338E-12  1.8019E-11 -5.7176E-13  3.1891E-12 -1.7640E-13  3.3454E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.960443 -122.208962    0.618053    0.095786   -0.784424  2456392.027708
# Heliocentric elements and errors
Epoch:              2456390.5000  =  2013/04/08
Mean Anomaly:          337.04734 +/-     0.834
Argument of Peri:       70.29280 +/-     0.921
Long of Asc Node:      192.11030 +/-     0.003
Inclination:             9.63972 +/-     0.000
Eccentricity:         0.04531394 +/-    0.0002
Semi-Major Axis:     42.39929508 +/-    0.0061
Time of Perihelion: 2462819.8489 +/-     233.5
Perihelion:          40.47801590 +/-    0.0116
Aphelion:            44.32057425 +/-    0.0119
Period (y)              276.0871 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -22.03068388 +/-    0.0006
Ecliptic Y          -33.81222338 +/-    0.0010
Ecliptic Z            4.83018320 +/-    0.0001
Ecliptic XDOT         0.00233906 +/-    0.0000
Ecliptic YDOT        -0.00141744 +/-    0.0000
Ecliptic ZDOT         0.00031874 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.64416504 +/-    0.0009
Geocenter to KBO     39.85740840 +/-    0.0012
# Hcoef:  8.52

The following table shows the complete astrometric record for 13JS64. 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 (13JS64) followed by the observatory code and reference code for the source of the astrometry.

2013 04  09.52693  15 48 31.201  -12 52 45.60  24.8r 13JS64    568  C~1XRe      
2013 04  10.49580  15 48 27.759  -12 52 26.23  24.2r 13JS64    568  C~1XRe      
2013 04  10.53608  15 48 27.620  -12 52 25.21        13JS64    568  C~1XRe      
2013 05  04.42521  15 46 46.409  -12 44 16.56  24.1r 13JS64    568  C~1XRe      
2013 05  07.42802  15 46 32.144  -12 43 16.75  24.2r 13JS64    568  C~1XRe      
2013 05  07.47225  15 46 31.915  -12 43 15.84        13JS64    568  C~1XRe      
2013 05  07.51247  15 46 31.722  -12 43 15.14  24.8r 13JS64    568  C~1XRe      
2013 05  09.47229  15 46 22.291  -12 42 36.76  24.6r 13JS64    568  C~1XRe      
2013 05  10.47981  15 46 17.420  -12 42 17.22  24.6r 13JS64    568  C~1XRe      
2013 06  01.38796  15 44 30.430  -12 35 53.70  24.2r 13JS64    568  C~1XRe      
2013 06  02.39467  15 44 25.637  -12 35 38.13  24.5r 13JS64    568  C~1XRe      
2013 06  06.36358  15 44 06.987  -12 34 41.42  24.4r 13JS64    568  C~1XRe      
2013 07  02.31641  15 42 21.529  -12 30 25.86  24.5r 13JS64    568  C~1XRe      
2013 07  03.35437  15 42 18.102  -12 30 20.45  25.0r 13JS64    568  C~1XRe      
2014 04  30.42091  15 53 02.099  -12 54 27.72  24.3r 13JS64    568  C~1XRe      
2014 04  30.52393  15 53 01.607  -12 54 25.78  24.1r 13JS64    568  C~1XRe      
2014 05  06.41552  15 52 34.201  -12 52 29.92  24.4r 13JS64    568  C~1XRe      
2014 05  06.48238  15 52 33.883  -12 52 28.57        13JS64    568  C~1XRe      
2016 06  08.21334  16 01 47.170  -12 59 51.22  24.0R 13JS64    G37              
2016 06  08.25548  16 01 46.955  -12 59 50.15        13JS64    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    -0.19       0.00     0.04
  2   0.0027    -53.34     0.02       7.96    -0.14
  3   0.0028    -55.55     0.11       8.51     0.09
  4   0.0682  -1606.96    -0.17     162.14    -0.04
  5   0.0764  -1823.72     0.13     174.73     0.10
  6   0.0765  -1827.19    -0.07     174.88     0.10
  7   0.0766  -1830.10     0.00     174.95     0.01
  8   0.0820  -1973.17     0.06     182.11    -0.05
  9   0.0847  -2047.00     0.21     185.53    -0.08
 10   0.1447  -3659.22    -0.09     214.46    -0.07
 11   0.1475  -3731.12    -0.12     214.12     0.35
 12   0.1583  -4010.02     0.04     208.96    -0.07
 13   0.2294  -5573.15     0.08     114.63    -0.02
 14   0.2322  -5623.32    -0.03     108.70    -0.12
 15   1.0565   3890.55     0.14     753.35     0.08
 16   1.0568   3883.10    -0.04     753.72    -0.07
 17   1.0729   3466.75    -0.07     781.37    -0.13
 18   1.0731   3461.91    -0.01     781.70    -0.06
 19   3.1641  11475.99     0.14    2043.38    -0.22
 20   3.1642  11472.68    -0.15    2043.79     0.28

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.

13JS64    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.275    42.295    42.255
ecceobj         0.044     0.044     0.045
incobj          9.661     9.661     9.661
qmin           39.993    40.106    39.980
qmax           45.290    45.391    45.343
amean          42.584    42.604    42.564
amin           42.253    42.273    42.230
amax           42.920    42.948    42.898
emean           0.041     0.041     0.042
emin            0.027     0.027     0.026
emax            0.056     0.057     0.058
imean          10.314    10.304    10.324
imin            9.538     9.528     9.552
imax           11.062    11.055    11.071
excite_mean     0.184     0.184     0.184
fracstop        1.000     1.000     1.000
cjmean          3.045     3.045     3.044

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       177.5     177.3     177.3
kozaiamp        180.0     180.0     180.0