Orbit Fit and Astrometric record for 13JR64

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: 13JR64    
# Created Tue Oct 24 01:38:16 2017
# Orbit generated from Bernstein formalism
# Fitting   27 observations of   27
# Arc:   3.12y
# First observation: 2013/04/19
#  Last observation: 2016/06/03
Preliminary a, adot, b, bdot, g, gdot:
  -0.000149   0.037022   0.000016  -0.004584   0.028390   0.000000
# Chi-squared of fit:    10.84 DOF:   48 RMS:  0.11
# Min/Max residuals:    -0.27    0.29
# Exact a, adot, b, bdot, g, gdot:
  2.035147E-05  3.693855E-02 -3.253030E-06 -4.573849E-03  2.859407E-02 -1.678300E-03
# Covariance matrix:
  1.7541E-13 -1.6024E-13 -4.4524E-15  1.3676E-14  4.3010E-14 -1.1043E-12
 -1.6024E-13  4.2910E-13  1.7766E-14 -5.2135E-14  1.1502E-13  4.4535E-12
 -4.4524E-15  1.7766E-14  1.2870E-13 -8.7921E-14  5.2541E-15  2.4072E-13
  1.3676E-14 -5.2135E-14 -8.7921E-14  1.0705E-13 -1.4037E-14 -7.0821E-13
  4.3010E-14  1.1502E-13  5.2541E-15 -1.4037E-14  1.9652E-13  1.3438E-12
 -1.1043E-12  4.4535E-12  2.4072E-13 -7.0821E-13  1.3438E-12  6.0306E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.022775 -117.728289    0.544086    0.118157   -0.838237  2456402.025788
# Heliocentric elements and errors
Epoch:              2456400.5000  =  2013/04/18
Mean Anomaly:          357.53381 +/-     0.009
Argument of Peri:      141.08960 +/-     0.034
Long of Asc Node:      109.51023 +/-     0.002
Inclination:            10.46932 +/-     0.000
Eccentricity:         0.53759294 +/-    0.0001
Semi-Major Axis:     77.06178660 +/-    0.0123
Time of Perihelion: 2458093.2031 +/-       5.9
Perihelion:          35.63391387 +/-    0.0079
Aphelion:           118.48965934 +/-    0.0197
Period (y)              676.4985 +/-      0.16
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -16.98686080 +/-    0.0003
Ecliptic Y          -31.14719257 +/-    0.0005
Ecliptic Z            4.88090027 +/-    0.0001
Ecliptic XDOT         0.00316995 +/-    0.0000
Ecliptic YDOT        -0.00155861 +/-    0.0000
Ecliptic ZDOT        -0.00045594 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.81234748 +/-    0.0004
Geocenter to KBO     34.97228331 +/-    0.0005
# Hcoef:  8.89

The following table shows the complete astrometric record for 13JR64. 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 (13JR64) followed by the observatory code and reference code for the source of the astrometry.

2013 04  19.52501  16 07 14.938  -12 44 39.81  24.0r 13JR64    568  C~1XRe      
2013 05  08.45928  16 05 45.907  -12 39 24.86  24.5r 13JR64    568  C~1XRe      
2013 05  08.50332  16 05 45.674  -12 39 24.16  24.3r 13JR64    568  C~1XRe      
2013 05  08.54713  16 05 45.451  -12 39 23.53  24.1r 13JR64    568  C~1XRe      
2013 05  09.55421  16 05 40.272  -12 39 07.86  25.0r 13JR64    568  C~1XRe      
2013 05  10.55976  16 05 35.060  -12 38 52.38  23.7r 13JR64    568  C~1XRe      
2013 06  06.34333  16 03 12.636  -12 33 13.18        13JR64    568  C~1XRe      
2013 06  06.42884  16 03 12.162  -12 33 12.36  24.4r 13JR64    568  C~1XRe      
2013 08  02.30273  15 59 51.702  -12 34 15.34  23.8r 13JR64    568  C~1XRe      
2013 08  05.29266  15 59 48.885  -12 34 53.22  24.1r 13JR64    568  C~1XRe      
2014 03  06.62146  16 17 05.213  -13 33 58.45  24.9r 13JR64    568  C~1XRe      
2014 03  07.59609  16 17 05.481  -13 33 48.91        13JR64    568  C~1XRe      
2014 04  04.51497  16 16 28.096  -13 27 44.87  24.4r 13JR64    568  C~1XRe      
2014 05  01.43754  16 14 43.839  -13 20 39.84  24.6r 13JR64    568  C~1XRe      
2014 05  01.46926  16 14 43.680  -13 20 39.46  24.2r 13JR64    568  C~1XRe      
2014 05  01.48870  16 14 43.579  -13 20 39.09  23.8r 13JR64    568  C~1XRe      
2014 05  01.52791  16 14 43.385  -13 20 38.51  24.3r 13JR64    568  C~1XRe      
2014 05  04.46606  16 14 29.158  -13 19 53.14  24.1r 13JR64    568  C~1XRe      
2014 05  04.48550  16 14 29.069  -13 19 52.99  24.2r 13JR64    568  C~1XRe      
2014 05  04.51675  16 14 28.925  -13 19 52.35  24.4r 13JR64    568  C~1XRe      
2014 06  21.44054  16 10 19.104  -13 11 18.61  24.5r 13JR64    568  C~1XRe      
2014 06  22.41323  16 10 14.530  -13 11 14.80  24.1r 13JR64    568  C~1XRe      
2014 07  18.36907  16 08 35.263  -13 11 34.86  24.6r 13JR64    568  C~2LSW      
2014 07  18.37716  16 08 35.240  -13 11 34.92  24.3r 13JR64    568  C~1XRe      
2015 03  22.57019  16 25 16.249  -14 08 30.22  24.4r 13JR64    568  C~1XRe      
2015 08  11.31349  16 16 12.012  -13 54 05.64  23.8r 13JR64    568  C~2LSW      
2016 06  03.41257  16 28 46.111  -14 30 03.08  24.8w 13JR64    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     0.02       0.00     0.15
  2   0.0518  -1338.94    -0.04      61.07     0.01
  3   0.0520  -1342.43    -0.08      61.10     0.01
  4   0.0521  -1345.75     0.01      61.10    -0.04
  5   0.0548  -1423.15     0.09      61.99    -0.13
  6   0.0576  -1500.99     0.01      62.59    -0.27
  7   0.1309  -3612.54     0.15      -5.75    -0.04
  8   0.1312  -3619.51    -0.15      -6.29    -0.07
  9   0.2869  -6487.51     0.02    -640.96    -0.14
 10   0.2951  -6520.53    -0.09    -686.24    -0.06
 11   0.8791   9026.05    -0.23   -1313.36     0.27
 12   0.8818   9028.18    -0.01   -1303.27     0.12
 13   0.9582   8425.07     0.04   -1043.29     0.13
 14   1.0319   6849.72     0.09    -901.43     0.13
 15   1.0320   6847.36     0.04    -901.48     0.01
 16   1.0321   6845.84    -0.06    -901.39     0.06
 17   1.0322   6842.95    -0.09    -901.33     0.03
 18   1.0402   6630.28    -0.02    -894.63     0.09
 19   1.0403   6628.97     0.13    -894.72    -0.03
 20   1.0404   6626.79     0.29    -894.48     0.17
 21   1.1716   2945.15    -0.18   -1063.41    -0.05
 22   1.1742   2878.80    -0.01   -1072.15    -0.15
 23   1.2453   1458.42     0.06   -1363.91    -0.02
 24   1.2453   1458.10     0.07   -1364.03    -0.04
 25   1.9221  16459.77     0.01   -2097.78     0.09
 26   2.3102   8480.78    -0.04   -2641.87    -0.01
 27   3.1236  19710.66    -0.02   -2858.44    -0.22

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.

13JR64    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        76.598    76.634    76.563
ecceobj         0.535     0.535     0.535
incobj         10.462    10.462    10.462
qmin           34.788    34.800    34.733
qmax          123.535   123.345   126.016
amean          77.343    77.379    77.295
amin           75.705    75.863    75.648
amax           79.578    79.538    80.844
emean           0.538     0.539     0.538
emin            0.524     0.525     0.523
emax            0.552     0.553     0.559
imean           8.814     8.712     8.855
imin            8.017     7.843     8.123
imax            9.651     9.539     9.688
excite_mean     0.560     0.560     0.560
fracstop        1.000     1.000     1.000
cjmean          3.059     3.059     3.058

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       196.4     197.0     193.3
kozaiamp        180.0     180.0     180.0