Orbit Fit and Astrometric record for 13JL64

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: 13JL64    
# Created Mon Dec 18 02:37:55 2017
# Orbit generated from Bernstein formalism
# Fitting   39 observations of   39
# Arc:   3.97y
# First observation: 2013/04/09
#  Last observation: 2017/03/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000144   0.022594  -0.000165  -0.011456   0.023754   0.000000
# Chi-squared of fit:     9.34 DOF:   72 RMS:  0.09
# Min/Max residuals:    -0.31    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.508625E-05  2.318845E-02 -7.292782E-06 -1.181003E-02  2.457102E-02  7.320365E-03
# Covariance matrix:
  1.4170E-13 -4.4397E-14 -3.2325E-15  4.5619E-15  8.8562E-14 -8.7121E-14
 -4.4397E-14  1.6880E-13  3.2383E-14 -8.2113E-14  1.1219E-13  1.9858E-12
 -3.2325E-15  3.2383E-14  8.9541E-14 -5.1772E-14  2.4094E-14  4.4697E-13
  4.5619E-15 -8.2113E-14 -5.1772E-14  7.2202E-14 -6.7126E-14 -1.1375E-12
  8.8562E-14  1.1219E-13  2.4094E-14 -6.7126E-14  2.4899E-13  1.6619E-12
 -8.7121E-14  1.9858E-12  4.4697E-13 -1.1375E-12  1.6619E-12  2.7537E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    7.589414 -120.159407    0.645548    0.101445   -0.761230  2456392.055928
# Heliocentric elements and errors
Epoch:              2456390.5000  =  2013/04/08
Mean Anomaly:           28.70330 +/-     0.009
Argument of Peri:      103.64808 +/-     0.019
Long of Asc Node:       73.34546 +/-     0.000
Inclination:            27.72352 +/-     0.000
Eccentricity:         0.36666931 +/-    0.0002
Semi-Major Axis:     56.63913135 +/-    0.0106
Time of Perihelion: 2443976.7621 +/-       1.6
Perihelion:          35.87130026 +/-    0.0134
Aphelion:            77.40696244 +/-    0.0186
Period (y)              426.2683 +/-      0.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -21.21084831 +/-    0.0004
Ecliptic Y          -35.21827962 +/-    0.0007
Ecliptic Z            5.37490674 +/-    0.0001
Ecliptic XDOT         0.00173420 +/-    0.0000
Ecliptic YDOT        -0.00214712 +/-    0.0000
Ecliptic ZDOT        -0.00119655 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.46223497 +/-    0.0006
Geocenter to KBO     40.69835645 +/-    0.0008
# Hcoef:  7.52

The following table shows the complete astrometric record for 13JL64. 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 (13JL64) followed by the observatory code and reference code for the source of the astrometry.

2013 04  09.55515  15 57 12.947  -12 41 38.13  23.5r 13JL64    568  C~1XRd      
2013 04  10.52413  15 57 09.533  -12 41 26.86  23.8r 13JL64    568  C~1XRd      
2013 04  10.56492  15 57 09.378  -12 41 26.37  23.7r 13JL64    568  C~1XRd      
2013 04  19.57778  15 56 34.648  -12 39 39.67        13JL64    568  C~1XRd      
2013 05  07.45588  15 55 14.026  -12 36 13.41  23.4r 13JL64    568  C~1XRd      
2013 05  07.50007  15 55 13.820  -12 36 12.87  23.0r 13JL64    568  C~1XRd      
2013 05  07.54026  15 55 13.618  -12 36 12.53  23.4r 13JL64    568  C~1XRd      
2013 05  09.49657  15 55 04.128  -12 35 51.51  23.4r 13JL64    568  C~1XRd      
2013 05  10.50767  15 54 59.204  -12 35 40.65        13JL64    568  C~1XRd      
2013 06  04.38499  15 52 56.056  -12 32 14.67        13JL64    568  C~1XRd      
2013 06  06.38838  15 52 46.416  -12 32 03.89  23.5r 13JL64    568  C~1XRd      
2013 07  02.34127  15 50 56.027  -12 31 32.01  23.6r 13JL64    568  C~1XRd      
2013 07  03.37823  15 50 52.356  -12 31 35.10  23.9r 13JL64    568  C~1XRd      
2014 03  06.58616  16 03 06.121  -13 41 46.33  24.1r 13JL64    568  C~1XRd      
2014 05  01.40606  16 00 29.578  -13 33 14.65  23.7r 13JL64    568  C~1XRd      
2014 05  01.45743  16 00 29.336  -13 33 14.14  23.8r 13JL64    568  C~1XRd      
2014 05  01.51609  16 00 29.052  -13 33 13.77        13JL64    568  C~1XRd      
2014 05  04.40376  16 00 15.673  -13 32 42.99  23.1r 13JL64    568  C~1XRd      
2014 05  04.45442  16 00 15.435  -13 32 42.53  23.7r 13JL64    568  C~1XRd      
2014 05  04.50508  16 00 15.181  -13 32 41.91  23.5r 13JL64    568  C~1XRd      
2014 05  22.53753  15 58 47.075  -13 29 50.95  23.8r 13JL64    568  C~1XRd      
2014 05  25.49675  15 58 32.298  -13 29 27.48  23.4r 13JL64    568  C~1XRd      
2014 06  02.47294  15 57 52.820  -13 28 32.25  23.6r 13JL64    568  C~1XRd      
2014 06  21.43206  15 56 25.179  -13 27 21.15  23.5r 13JL64    568  C~1XRd      
2014 06  22.40477  15 56 21.072  -13 27 19.97  23.6r 13JL64    568  C~1XRd      
2014 07  01.38714  15 55 45.395  -13 27 23.66  23.8r 13JL64    568  C~1XRd      
2014 07  18.36111  15 54 52.310  -13 28 40.49  23.6r 13JL64    568  C~1XRd      
2014 07  26.28881  15 54 35.093  -13 29 48.90  23.8r 13JL64    568  C~1XRd      
2015 03  22.59524  16 07 28.192  -14 34 00.32  23.6r 13JL64    568  C~1XRd      
2015 08  11.31763  15 58 57.206  -14 27 14.46  23.6r 13JL64    568  C~2LSW      
2016 05  07.49747  16 09 26.371  -15 20 36.73  23.8r 13JL64    568  C~2LSW      
2016 05  07.56344  16 09 26.058  -15 20 36.18  24.0r 13JL64    568  C~2LSW      
2016 05  11.46052  16 09 07.462  -15 20 02.63  23.5r 13JL64    568  C~2LSW      
2016 05  11.52621  16 09 07.139  -15 20 02.22  22.5r 13JL64    568  C~2LSW      
2016 05  29.39274  16 07 38.993  -15 17 47.15  23.6w 13JL64    568  C~2LSW      
2016 06  03.43279  16 07 14.141  -15 17 16.65  23.7w 13JL64    568  C~2LSW      
2017 01  31.66055  16 16 08.349  -16 17 33.16  24.0w 13JL64    568  C~2LSW      
2017 01  31.66166  16 16 08.353  -16 17 33.04  23.9w 13JL64    568  C~2LSW      
2017 03  30.60077  16 16 29.080  -16 17 51.44  24.1w 13JL64    568  C~2LSW      

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    -0.03       0.00    -0.06
  2   0.0027    -51.21     0.07       0.80    -0.06
  3   0.0028    -53.53    -0.01       0.81    -0.07
  4   0.0274   -572.86    -0.18       0.96    -0.05
  5   0.0764  -1770.14    -0.02     -40.40     0.01
  6   0.0765  -1773.20     0.12     -40.49     0.10
  7   0.0766  -1776.16     0.08     -40.77    -0.01
  8   0.0820  -1916.44    -0.02     -48.93     0.00
  9   0.0847  -1989.22     0.13     -53.22     0.23
 10   0.1529  -3795.98     0.09    -226.59    -0.07
 11   0.1583  -3936.32    -0.02    -245.54     0.02
 12   0.2294  -5524.27     0.01    -553.70    -0.05
 13   0.2322  -5576.21    -0.10    -568.05     0.03
 14   0.9063   5782.05     0.15   -2492.62    -0.05
 15   1.0591   3442.37    -0.05   -2448.30     0.01
 16   1.0593   3438.81    -0.08   -2448.51    -0.03
 17   1.0594   3434.68    -0.16   -2448.98    -0.31
 18   1.0673   3237.31    -0.03   -2458.19     0.08
 19   1.0675   3233.82     0.04   -2458.44     0.03
 20   1.0676   3230.07    -0.15   -2458.58     0.09
 21   1.1170   1936.83     0.05   -2551.45     0.20
 22   1.1251   1720.99    -0.14   -2572.32     0.02
 23   1.1469   1145.91    -0.05   -2635.64     0.00
 24   1.1988   -120.13     0.04   -2828.05    -0.14
 25   1.2015   -179.01     0.18   -2839.22     0.03
 26   1.2261   -687.61     0.01   -2950.06     0.04
 27   1.2726  -1429.50    -0.02   -3185.37     0.06
 28   1.2943  -1661.05    -0.03   -3304.39    -0.01
 29   1.9495  10144.59     0.07   -4818.99    -0.01
 30   2.3375   2781.72     0.04   -5894.93    -0.08
 31   3.0772  12375.15     0.05   -7238.94     0.06
 32   3.0774  12370.59     0.10   -7239.27     0.04
 33   3.0880  12099.05    -0.01   -7257.86     0.12
 34   3.0882  12094.37     0.01   -7258.36    -0.03
 35   3.1371  10812.45    -0.04   -7371.38    -0.12
 36   3.1509  10452.64    -0.02   -7411.10     0.01
 37   3.8141  18761.59    -0.04   -9521.22    -0.10
 38   3.8141  18761.62    -0.05   -9521.09     0.03
 39   3.9727  19061.04     0.02   -9484.55     0.04

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.

13JL64    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        56.306    56.337    56.276
ecceobj         0.362     0.363     0.362
incobj         27.722    27.722    27.722
qmin           35.351    35.215    35.330
qmax           79.496    79.634    79.277
amean          56.857    56.928    56.811
amin           56.234    56.270    56.186
amax           57.710    57.784    57.609
emean           0.357     0.360     0.357
emin            0.334     0.343     0.337
emax            0.379     0.379     0.377
imean          26.852    26.733    26.779
imin           26.205    26.018    26.181
imax           27.777    27.317    27.573
excite_mean     0.576     0.576     0.575
fracstop        1.000     1.000     1.000
cjmean          2.820     2.821     2.821

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       195.6     176.0     188.2
kozaiamp        180.0     179.9     180.0