Orbit Fit and Astrometric record for 13NK24

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: 13NK24    
# Created Mon Dec 11 02:37:59 2017
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   20
# Arc:   2.03y
# First observation: 2013/07/13
#  Last observation: 2015/07/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.000113   0.029126  -0.000026   0.013966   0.028445   0.000000
# Chi-squared of fit:     7.48 DOF:   34 RMS:  0.11
# Min/Max residuals:    -0.24    0.39
# Exact a, adot, b, bdot, g, gdot:
  1.630162E-05  2.914850E-02  7.678670E-06  1.397643E-02  2.878061E-02  8.971730E-04
# Covariance matrix:
  1.7770E-13 -2.0165E-13  8.4988E-15 -5.1300E-14  5.7938E-15 -1.9078E-12
 -2.0165E-13  8.8486E-13 -6.9386E-14  3.9855E-13  3.2982E-13  1.4847E-11
  8.4988E-15 -6.9386E-14  1.6723E-13 -1.4329E-13 -3.2665E-14 -1.3642E-12
 -5.1300E-14  3.9855E-13 -1.4329E-13  3.4160E-13  1.6365E-13  7.8550E-12
  5.7938E-15  3.2982E-13 -3.2665E-14  1.6365E-13  6.0129E-13  6.1284E-12
 -1.9078E-12  1.4847E-11 -1.3642E-12  7.8550E-12  6.1284E-12  2.9260E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -8.581826  -56.431283    0.222159   -0.148372   -0.983241  2456486.957818
# Heliocentric elements and errors
Epoch:              2456480.5000  =  2013/07/07
Mean Anomaly:            8.02391 +/-     0.177
Argument of Peri:      330.47551 +/-     0.239
Long of Asc Node:      320.06501 +/-     0.000
Inclination:            26.83372 +/-     0.001
Eccentricity:         0.14061719 +/-    0.0002
Semi-Major Axis:     41.48345777 +/-    0.0055
Time of Perihelion: 2454305.3244 +/-      48.0
Perihelion:          35.65017052 +/-    0.0083
Aphelion:            47.31674501 +/-    0.0093
Period (y)              267.1903 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           19.36230771 +/-    0.0005
Ecliptic Y          -29.57528985 +/-    0.0008
Ecliptic Z           -5.18447849 +/-    0.0001
Ecliptic XDOT         0.00246051 +/-    0.0000
Ecliptic YDOT         0.00129694 +/-    0.0000
Ecliptic ZDOT         0.00130207 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.72779796 +/-    0.0007
Geocenter to KBO     34.74562095 +/-    0.0009
# Hcoef:  6.54

The following table shows the complete astrometric record for 13NK24. 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 (13NK24) followed by the observatory code and reference code for the source of the astrometry.

2013 07  13.45704  20 32 31.087  -27 41 11.67  22.0w 13NK24    F51  C~1vX0      
2013 07  13.47156  20 32 31.005  -27 41 12.07  22.1w 13NK24    F51  C~1vX0      
2013 07  13.48865  20 32 30.900  -27 41 12.11  22.4w 13NK24    F51  C~1vX0      
2013 07  13.50507  20 32 30.799  -27 41 12.40  21.9w 13NK24    F51  C~1vX0      
2013 08  02.40153  20 30 26.844  -27 45 43.12  22.0w 13NK24    F51  C~1vX0      
2013 08  02.41517  20 30 26.764  -27 45 43.31  22.1w 13NK24    F51  C~1vX0      
2013 08  02.42882  20 30 26.675  -27 45 43.48  22.1w 13NK24    F51  C~1vX0      
2013 08  02.44249  20 30 26.587  -27 45 43.59  22.1w 13NK24    F51  C~1vX0      
2014 06  04.55711  20 41 55.317  -26 18 40.15  22.0w 13NK24    F51  C~1vX0      
2014 06  04.56812  20 41 55.252  -26 18 40.40  22.0w 13NK24    F51  C~1vX0      
2014 06  04.57911  20 41 55.225  -26 18 40.57  22.0w 13NK24    F51  C~1vX0      
2014 06  04.59009  20 41 55.200  -26 18 40.28  22.1w 13NK24    F51  C~1vX0      
2014 08  22.38226  20 34 49.592  -26 37 10.18  22.2w 13NK24    F51  C~1vX0      
2014 08  22.39373  20 34 49.522  -26 37 10.01  22.1w 13NK24    F51  C~1vX0      
2014 08  22.40520  20 34 49.456  -26 37 10.04  22.2w 13NK24    F51  C~1vX0      
2014 08  22.41664  20 34 49.390  -26 37 10.33  22.1w 13NK24    F51  C~1vX0      
2015 07  24.44135  20 43 58.500  -25 19 26.59  22.3w 13NK24    F51  C~1vX0      
2015 07  24.45165  20 43 58.436  -25 19 26.92  22.2w 13NK24    F51  C~1vX0      
2015 07  24.46197  20 43 58.377  -25 19 26.98  22.3w 13NK24    F51  C~1vX0      
2015 07  24.47230  20 43 58.293  -25 19 27.18  22.3w 13NK24    F51  C~1vX0      

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    -0.06       0.00     0.00
  2   0.0000     -1.15    -0.01      -0.12    -0.19
  3   0.0001     -2.52     0.05       0.19     0.03
  4   0.0001     -3.89     0.05       0.24     0.00
  5   0.0546  -1665.76    -0.03     143.32     0.01
  6   0.0546  -1666.83     0.05     143.40    -0.05
  7   0.0547  -1668.02     0.03     143.52    -0.06
  8   0.0547  -1669.18     0.03     143.70    -0.02
  9   0.8928   8566.82     0.16    2844.68     0.02
 10   0.8928   8565.91    -0.24    2844.68     0.04
 11   0.8929   8565.51    -0.14    2844.61    -0.00
 12   0.8929   8565.26     0.11    2844.98     0.39
 13   1.1086   2752.74    -0.02    3256.04    -0.13
 14   1.1087   2751.87    -0.02    3256.44     0.11
 15   1.1087   2751.01    -0.01    3256.64     0.14
 16   1.1087   2750.08    -0.07    3256.58    -0.08
 17   2.0287  11130.12     0.09    5828.10     0.02
 18   2.0287  11129.19     0.04    5828.01    -0.14
 19   2.0288  11128.40     0.13    5828.17    -0.07
 20   2.0288  11127.25    -0.14    5828.28    -0.03

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.

13NK24    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        41.508    41.527    41.490
ecceobj         0.142     0.142     0.141
incobj         26.786    26.786    26.786
qmin           34.599    34.414    34.857
qmax           48.991    49.220    48.652
amean          41.621    41.663    41.616
amin           41.243    41.257    41.245
amax           42.029    42.033    42.016
emean           0.145     0.151     0.143
emin            0.128     0.129     0.129
emax            0.166     0.171     0.160
imean          27.987    27.923    28.015
imin           27.460    27.379    27.608
imax           28.413    28.443    28.412
excite_mean     0.491     0.492     0.491
fracstop        1.000     1.000     1.000
cjmean          2.778     2.777     2.778

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       179.4     169.3     174.1
kozaiamp        180.0     180.0     180.0