Orbit Fit and Astrometric record for 13JT65

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: 13JT65    
# Created Mon Dec 18 02:37:56 2017
# Orbit generated from Bernstein formalism
# Fitting   22 observations of   22
# Arc:   1.87y
# First observation: 2013/05/08
#  Last observation: 2015/03/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000050   0.023582   0.000000   0.001062   0.023736   0.000000
# Chi-squared of fit:    10.27 DOF:   38 RMS:  0.12
# Min/Max residuals:    -0.23    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.649514E-05  2.388824E-02  5.333040E-07  1.073858E-03  2.412924E-02  4.449843E-03
# Covariance matrix:
  1.8805E-13 -1.8687E-13  1.0605E-15  2.7338E-15  1.1133E-13 -5.2419E-13
 -1.8687E-13  7.8865E-13  1.4589E-16  1.0159E-14  1.4725E-13  1.4609E-11
  1.0605E-15  1.4589E-16  1.3821E-13 -1.1669E-13  3.3677E-15  3.4545E-14
  2.7338E-15  1.0159E-14 -1.1669E-13  1.9400E-13  1.4663E-14  3.6227E-13
  1.1133E-13  1.4725E-13  3.3677E-15  1.4663E-14  4.3422E-13  7.3114E-12
 -5.2419E-13  1.4609E-11  3.4545E-14  3.6227E-13  7.3114E-12  3.9294E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.346507 -117.470259    0.255194    0.142110   -0.968558  2456420.972168
# Heliocentric elements and errors
Epoch:              2456420.5000  =  2013/05/08
Mean Anomaly:           53.55184 +/-     0.035
Argument of Peri:      357.63292 +/-     0.067
Long of Asc Node:      170.28934 +/-     0.007
Inclination:             8.57374 +/-     0.000
Eccentricity:         0.19803381 +/-    0.0008
Semi-Major Axis:     46.48537694 +/-    0.0178
Time of Perihelion: 2439200.0364 +/-       5.4
Perihelion:          37.27970079 +/-    0.0419
Aphelion:            55.69105308 +/-    0.0449
Period (y)              316.9441 +/-      0.18
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -19.59179395 +/-    0.0005
Ecliptic Y          -37.12988837 +/-    0.0010
Ecliptic Z            6.01598125 +/-    0.0002
Ecliptic XDOT         0.00217629 +/-    0.0000
Ecliptic YDOT        -0.00167782 +/-    0.0000
Ecliptic ZDOT         0.00019399 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.41060046 +/-    0.0009
Geocenter to KBO     41.44348487 +/-    0.0011
# Hcoef:  8.02

The following table shows the complete astrometric record for 13JT65. 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 (13JT65) followed by the observatory code and reference code for the source of the astrometry.

2013 05  08.47139  16 08 31.654  -12 28 28.97  24.1r 13JT65    568  C~1XRg      
2013 05  08.51523  16 08 31.478  -12 28 28.40  24.2r 13JT65    568  C~1XRg      
2013 05  08.55905  16 08 31.256  -12 28 27.51  24.3r 13JT65    568  C~1XRg      
2013 05  09.56658  16 08 26.669  -12 28 10.85  24.3r 13JT65    568  C~1XRg      
2013 05  10.57167  16 08 22.075  -12 27 54.28  24.4r 13JT65    568  C~1XRg      
2013 06  08.31277  16 06 07.027  -12 21 19.22        13JT65    568  C~1XRg      
2013 06  12.46117  16 05 48.209  -12 20 37.87  23.8r 13JT65    568  C~1XRg      
2013 06  13.45477  16 05 43.792  -12 20 28.83  24.1r 13JT65    568  C~1XRg      
2013 07  02.38082  16 04 27.370  -12 18 31.28  24.2r 13JT65    568  C~1XRg      
2013 07  04.37206  16 04 20.408  -12 18 25.69  24.3r 13JT65    568  C~1XRg      
2013 08  02.31452  16 03 11.192  -12 19 32.06  24.0r 13JT65    568  C~1XRg      
2014 03  06.62146  16 16 47.001  -12 57 03.40  24.1r 13JT65    568  C~1XRg      
2014 03  07.59609  16 16 46.959  -12 56 50.71  24.2r 13JT65    568  C~1XRg      
2014 05  01.47703  16 14 34.765  -12 42 00.68  24.5r 13JT65    568  C~1XRg      
2014 05  01.48870  16 14 34.719  -12 42 00.78        13JT65    568  C~1XRg      
2014 05  01.53752  16 14 34.491  -12 41 59.50  24.2r 13JT65    568  C~1XRg      
2014 05  01.54921  16 14 34.444  -12 41 59.48  23.9r 13JT65    568  C~1XRg      
2014 05  22.52190  16 12 59.156  -12 36 31.26  23.9r 13JT65    568  C~1XRg      
2014 05  25.48096  16 12 45.127  -12 35 51.00  24.2r 13JT65    568  C~1XRg      
2014 07  18.36907  16 09 08.758  -12 30 12.47  24.1r 13JT65    568  C~2LSX      
2015 03  22.59103  16 22 00.655  -13 03 59.54  24.2r 13JT65    568  C~1XRg      
2015 03  22.62539  16 22 00.608  -13 03 58.86  24.2r 13JT65    568  C~1XRg      

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    -0.17       0.00     0.04
  2   0.0001     -2.64     0.24       0.08    -0.05
  3   0.0002     -6.00    -0.08       0.34     0.05
  4   0.0030    -75.11    -0.14       4.07    -0.01
  5   0.0058   -144.32    -0.09       7.70     0.03
  6   0.0844  -2161.79     0.20      21.49    -0.15
  7   0.0958  -2440.40    -0.11       9.61    -0.01
  8   0.0985  -2505.67     0.01       6.16    -0.09
  9   0.1503  -3627.65    -0.02     -92.47     0.06
 10   0.1558  -3728.89     0.08    -106.55    -0.08
 11   0.2350  -4711.96     0.05    -366.81     0.19
 12   0.8272   7442.97     0.19    -351.24    -0.14
 13   0.8299   7440.08     0.00    -338.86     0.13
 14   0.9802   5375.35     0.07     186.35     0.06
 15   0.9802   5374.70     0.19     186.13    -0.22
 16   0.9803   5371.19    -0.15     186.78     0.18
 17   0.9804   5370.51    -0.06     186.67     0.01
 18   1.0378   3938.66    -0.23     254.10     0.25
 19   1.0459   3729.32     0.05     255.91    -0.09
 20   1.1934    553.16     0.00       0.30    -0.07
 21   1.8703  12038.46    -0.02      53.93    -0.12
 22   1.8704  12037.66    -0.01      54.48     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.

13JT65    quality flag:2

Type:      CLASSICAL  SCATNEAR CLASSICAL

axisobj        46.299    46.351    46.248
ecceobj         0.194     0.196     0.192
incobj          8.586     8.586     8.586
qmin           36.719    36.643    36.747
qmax           57.068    57.308    57.048
amean          46.692    46.747    46.651
amin           46.276    46.320    46.237
amax           47.171    47.264    47.151
emean           0.197     0.199     0.195
emin            0.184     0.185     0.182
emax            0.212     0.214     0.211
imean           8.114     8.102     8.126
imin            7.419     7.413     7.439
imax            8.906     8.906     8.902
excite_mean     0.242     0.244     0.241
fracstop        1.000     1.000     1.000
cjmean          3.062     3.062     3.062

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       172.4     172.6     172.6
kozaiamp        180.0     180.0     179.9