Orbit Fit and Astrometric record for 13HS156

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: 13HS156   
# Created Tue Dec 12 02:37:57 2017
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   20
# Arc:   3.12y
# First observation: 2013/04/17
#  Last observation: 2016/05/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000095   0.028665   0.000022  -0.004169   0.026258   0.000000
# Chi-squared of fit:    38.26 DOF:   34 RMS:  0.24
# Min/Max residuals:    -1.24    0.40
# Exact a, adot, b, bdot, g, gdot:
  1.527828E-05  2.861463E-02 -2.177851E-06 -4.143442E-03  2.663265E-02 -2.306104E-03
# Covariance matrix:
  2.0337E-13 -2.4769E-13 -1.0281E-14  3.2153E-14  4.0103E-14 -2.5956E-12
 -2.4769E-13  7.0181E-13  3.5457E-14 -1.0959E-13  1.0345E-13  8.8335E-12
 -1.0281E-14  3.5457E-14  1.3782E-13 -8.1989E-14  5.0455E-15  5.1542E-13
  3.2153E-14 -1.0959E-13 -8.1989E-14  1.1224E-13 -1.4218E-14 -1.5950E-12
  4.0103E-14  1.0345E-13  5.0455E-15 -1.4218E-14  2.7024E-13  1.1320E-12
 -2.5956E-12  8.8335E-12  5.1542E-13 -1.5950E-12  1.1320E-12  1.2859E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.563597 -141.982869    0.183051    0.009743   -0.988842  2456399.964708
# Heliocentric elements and errors
Epoch:              2456390.5000  =  2013/04/08
Mean Anomaly:          336.75655 +/-     0.088
Argument of Peri:      209.18469 +/-     0.133
Long of Asc Node:       41.52468 +/-     0.000
Inclination:             8.26857 +/-     0.001
Eccentricity:         0.17462770 +/-    0.0002
Semi-Major Axis:     45.56802313 +/-    0.0046
Time of Perihelion: 2463644.6539 +/-      27.4
Perihelion:          37.61058404 +/-    0.0102
Aphelion:            53.52546223 +/-    0.0109
Period (y)              307.6086 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -30.47064182 +/-    0.0006
Ecliptic Y          -23.58727297 +/-    0.0004
Ecliptic Z            0.36929751 +/-    0.0000
Ecliptic XDOT         0.00198887 +/-    0.0000
Ecliptic YDOT        -0.00217378 +/-    0.0000
Ecliptic ZDOT        -0.00042812 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.53512475 +/-    0.0005
Geocenter to KBO     37.54789538 +/-    0.0007
# Hcoef:  8.54

The following table shows the complete astrometric record for 13HS156. 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 (13HS156) followed by the observatory code and reference code for the source of the astrometry.

2013 04  17.46393  14 23 21.054  -13 38 52.13  23.7r 13HS156   568  C~1XRb      
2013 04  19.44191  14 23 11.134  -13 38 07.23        13HS156   568  C~1XRb      
2013 04  19.49245  14 23 10.869  -13 38 06.17  24.2r 13HS156   568  C~1XRb      
2013 04  19.54534  14 23 10.594  -13 38 04.83  24.0r 13HS156   568  C~1XRb      
2013 05  11.47819  14 21 19.717  -13 29 46.56  24.1r 13HS156   568  C~1XRb      
2013 05  12.48047  14 21 14.778  -13 29 24.76  24.1r 13HS156   568  C~1XRb      
2013 06  12.37556  14 19 03.798  -13 19 56.23  24.3r 13HS156   568  C~1XRb      
2013 08  02.27054  14 18 07.362  -13 17 53.54  24.4r 13HS156   568  C~1XRb      
2013 08  05.27111  14 18 11.802  -13 18 25.39        13HS156   568  C~1XRb      
2014 02  24.61287  14 32 34.674  -14 37 05.84  24.6r 13HS156   568  C~1XRc      
2014 02  28.54389  14 32 27.864  -14 36 39.52  24.2r 13HS156   568  C~1XRc      
2014 04  04.43513  14 30 30.559  -14 28 27.89  24.1r 13HS156   568  C~1XRc      
2014 04  04.47439  14 30 30.374  -14 28 26.98  24.5r 13HS156   568  C~1XRc      
2014 04  05.55924  14 30 25.443  -14 28 05.50        13HS156   568  C~1XRc      
2014 05  22.43425  14 26 33.059  -14 11 11.38  24.3r 13HS156   568  C~1XRc      
2014 05  25.36555  14 26 19.573  -14 10 13.44  24.3r 13HS156   568  C~1XRc      
2014 05  25.37028  14 26 19.540  -14 10 13.23  24.0r 13HS156   568  C~1XRc      
2014 06  26.33823  14 24 25.476  -14 02 21.20  24.8r 13HS156   568  C~1XRc      
2016 05  29.20731  14 38 21.728  -15 38 11.25  24.1R 13HS156   G37              
2016 05  29.27731  14 38 21.394  -15 38 10.07        13HS156   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     0.35       0.00    -0.06
  2   0.0054   -151.36     0.06      -4.14     0.09
  3   0.0056   -155.35     0.01      -4.39    -0.02
  4   0.0057   -159.58    -0.10      -4.41     0.09
  5   0.0657  -1850.64    -0.12     -56.05     0.23
  6   0.0685  -1925.86    -0.10     -58.80     0.02
  7   0.1531  -3918.37    -0.21    -143.47    -0.09
  8   0.2924  -4737.34    -0.05    -297.00     0.15
  9   0.3006  -4665.64     0.30    -305.87     0.40
 10   0.8574   8750.97    -0.03    -753.08    -1.24
 11   0.8681   8648.67     0.10    -759.04    -0.10
 12   0.9636   6874.74     0.01    -827.54    -0.03
 13   0.9638   6871.90    -0.09    -827.53     0.09
 14   0.9667   6797.08    -0.07    -829.72     0.24
 15   1.0951   3270.28    -0.20    -939.67     0.23
 16   1.1031   3065.87     0.11    -947.41    -0.05
 17   1.1031   3065.34    -0.08    -947.36     0.01
 18   1.1906   1341.99     0.06   -1031.99    -0.19
 19   3.1150  14685.21     0.07   -2684.84     0.20
 20   3.1152  14680.23    -0.02   -2685.20     0.02

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.

13HS156    quality flag:2

Type:       SCATNEAR CLASSICAL CLASSICAL

axisobj        45.380    45.392    45.367
ecceobj         0.173     0.173     0.173
incobj          8.281     8.281     8.281
qmin           37.065    37.087    37.048
qmax           54.901    54.864    54.805
amean          45.781    45.783    45.732
amin           45.352    45.365    45.328
amax           46.273    46.263    46.192
emean           0.171     0.173     0.172
emin            0.155     0.158     0.158
emax            0.188     0.188     0.187
imean           7.093     7.233     7.192
imin            6.424     6.463     6.464
imax            7.863     7.952     7.948
excite_mean     0.211     0.214     0.213
fracstop        1.000     1.000     1.000
cjmean          3.068     3.067     3.067

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       180.9     180.7     180.1
kozaiamp        179.9     180.0     180.0