Orbit Fit and Astrometric record for 13JU63

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: 13JU63    
# Created Tue Dec 12 02:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting    9 observations of    9
# Arc:   3.06y
# First observation: 2013/05/08
#  Last observation: 2016/05/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000006   0.032090  -0.000003   0.001493   0.027050   0.000000
# Chi-squared of fit:     4.69 DOF:   12 RMS:  0.13
# Min/Max residuals:    -0.31    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.689210E-05  3.188430E-02  9.505912E-07  1.478229E-03  2.785149E-02 -3.242276E-03
# Covariance matrix:
  4.1531E-13 -2.8396E-12  4.8549E-14 -2.1236E-13  8.9058E-12 -4.2437E-11
 -2.8396E-12  1.1283E-10 -2.1129E-12  9.2447E-12 -4.2766E-10  1.8359E-09
  4.8549E-14 -2.1129E-12  3.2183E-13 -2.9171E-13  8.0684E-12 -3.4482E-11
 -2.1236E-13  9.2447E-12 -2.9171E-13  8.7593E-13 -3.5304E-11  1.5088E-10
  8.9058E-12 -4.2766E-10  8.0684E-12 -3.5304E-11  1.6525E-09 -7.0054E-09
 -4.2437E-11  1.8359E-09 -3.4482E-11  1.5088E-10 -7.0054E-09  2.9955E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.482279 -133.538240   -0.019178   -0.061376   -1.009502  2456420.589768
# Heliocentric elements and errors
Epoch:              2456420.5000  =  2013/05/08
Mean Anomaly:          343.36192 +/-     1.037
Argument of Peri:      336.82466 +/-     1.850
Long of Asc Node:      278.13346 +/-     0.006
Inclination:             4.31621 +/-     0.000
Eccentricity:         0.25567358 +/-    0.0025
Semi-Major Axis:     48.36367355 +/-    0.3762
Time of Perihelion: 2462098.2741 +/-     347.5
Perihelion:          35.99836004 +/-    0.3049
Aphelion:            60.72898706 +/-    0.4876
Period (y)              336.3467 +/-      3.92
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -25.36872306 +/-    0.0360
Ecliptic Y          -26.72404268 +/-    0.0379
Ecliptic Z           -2.18080707 +/-    0.0032
Ecliptic XDOT         0.00247882 +/-    0.0000
Ecliptic YDOT        -0.00193475 +/-    0.0000
Ecliptic ZDOT         0.00016455 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.91209133 +/-    0.0370
Geocenter to KBO     35.90471581 +/-    0.0524
# Hcoef:  6.76

The following table shows the complete astrometric record for 13JU63. 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 (13JU63) followed by the observatory code and reference code for the source of the astrometry.

2013 05  08.08899  14 51 44.377  -20 05 35.87  22.3r 13JU63    807  C~143e      
2013 05  08.17722  14 51 43.870  -20 05 33.88        13JU63    807  C~143e      
2013 05  08.28150  14 51 43.308  -20 05 31.08        13JU63    807  C~143e      
2013 05  09.12531  14 51 38.731  -20 05 10.61        13JU63    304  C~143e      
2014 05  01.32346  14 59 57.646  -20 34 48.90        13JU63    304  C~143e      
2014 05  02.35350  14 59 52.073  -20 34 25.75  22.2r 13JU63    304  C~143e      
2014 05  02.38489  14 59 51.907  -20 34 25.15        13JU63    304  C~143e      
2016 05  29.22878  15 12 50.835  -21 14 02.58  21.9R 13JU63    G37              
2016 05  29.30285  15 12 50.429  -21 14 00.96        13JU63    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     0.25       0.00    -0.02
  2   0.0002     -7.41    -0.01      -0.18    -0.23
  3   0.0005    -15.80     0.07       0.19     0.07
  4   0.0028    -83.45    -0.31       0.95     0.01
  5   0.9808   7152.25    -0.10     303.18     0.05
  6   0.9836   7070.54    -0.01     303.50     0.15
  7   0.9837   7068.13     0.10     303.42     0.06
  8   3.0586  18263.95     0.09     967.24     0.01
  9   3.0588  18258.00    -0.08     967.32    -0.09

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.

13JU63    quality flag:2

Type:       SCATNEAR  SCATNEAR      2:1E

axisobj        48.156    49.354    47.057
ecceobj         0.254     0.262     0.248
incobj          4.312     4.313     4.312
qmin           35.154    35.983    34.783
qmax           62.659    64.203    62.101
amean          48.554    49.767    47.798
amin           47.952    49.292    47.047
amax           49.132    50.342    48.701
emean           0.255     0.266     0.259
emin            0.237     0.257     0.242
emax            0.276     0.275     0.276
imean           6.467     5.938     6.079
imin            5.449     5.577     5.589
imax            7.928     6.287     6.572
excite_mean     0.279     0.285     0.280
fracstop        1.000     1.000     1.000
cjmean          3.059     3.070     3.050

libcent 0      -180.0    -180.0     179.9
libamp  0      -180.0    -180.0     162.8
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       178.5     177.7     160.5
kozaiamp        180.0     180.0     180.0