Orbit Fit and Astrometric record for 13NL24

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: 13NL24    
# Created Mon Dec 18 02:37:56 2017
# Orbit generated from Bernstein formalism
# Fitting   18 observations of   18
# Arc:   3.97y
# First observation: 2011/07/26
#  Last observation: 2015/07/14
Preliminary a, adot, b, bdot, g, gdot:
   0.000069   0.060486   0.000010   0.003085   0.041555   0.000000
# Chi-squared of fit:     8.30 DOF:   30 RMS:  0.12
# Min/Max residuals:    -0.28    0.40
# Exact a, adot, b, bdot, g, gdot:
  2.322256E-05  6.109671E-02  1.551140E-06  3.130928E-03  4.172619E-02  5.669533E-03
# Covariance matrix:
  3.3890E-13 -2.6235E-13  4.6057E-15 -8.7285E-15 -2.9107E-15 -7.2350E-13
 -2.6235E-13  4.8652E-13 -1.2721E-14  2.2650E-14  4.4683E-13  1.9035E-12
  4.6057E-15 -1.2721E-14  2.3662E-13 -8.9069E-14 -1.5546E-14 -5.6097E-14
 -8.7285E-15  2.2650E-14 -8.9069E-14  5.2021E-14  2.4892E-14  9.9305E-14
 -2.9107E-15  4.4683E-13 -1.5546E-14  2.4892E-14  1.3855E-12  2.1449E-12
 -7.2350E-13  1.9035E-12 -5.6097E-14  9.9305E-14  2.1449E-12  8.3565E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.831676  -49.414607    0.138029   -0.067196   -1.002423  2455768.941596
# Heliocentric elements and errors
Epoch:              2455760.5000  =  2011/07/18
Mean Anomaly:            7.46626 +/-     0.005
Argument of Peri:      290.23398 +/-     0.011
Long of Asc Node:        2.04679 +/-     0.002
Inclination:             4.67699 +/-     0.000
Eccentricity:         0.38037456 +/-    0.0001
Semi-Major Axis:     39.76197428 +/-    0.0071
Time of Perihelion: 2453861.1685 +/-       1.1
Perihelion:          24.63753097 +/-    0.0057
Aphelion:            54.88641759 +/-    0.0105
Period (y)              250.7322 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           16.10983458 +/-    0.0004
Ecliptic Y          -19.01171874 +/-    0.0005
Ecliptic Z           -1.60143955 +/-    0.0000
Ecliptic XDOT         0.00329204 +/-    0.0000
Ecliptic YDOT         0.00232135 +/-    0.0000
Ecliptic ZDOT         0.00018017 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   24.97071942 +/-    0.0005
Geocenter to KBO     23.96576517 +/-    0.0007
# Hcoef:  8.07

The following table shows the complete astrometric record for 13NL24. 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 (13NL24) followed by the observatory code and reference code for the source of the astrometry.

2011 07  26.44083  20 56 36.483  -21 16 03.01  22.1w 13NL24    F51  C~1vX0      
2011 07  26.45456  20 56 36.377  -21 16 03.33  21.9w 13NL24    F51  C~1vX0      
2011 07  26.46832  20 56 36.267  -21 16 03.63  21.9w 13NL24    F51  C~1vX0      
2011 07  26.48210  20 56 36.163  -21 16 04.22  21.9w 13NL24    F51  C~1vX0      
2012 08  21.39215  21 07 18.270  -20 18 57.50  22.6w 13NL24    F51  C~1vX0      
2012 08  21.40629  21 07 18.142  -20 18 57.43  22.2w 13NL24    F51  C~1vX0      
2012 08  21.42013  21 07 18.081  -20 18 58.14  22.1w 13NL24    F51  C~1vX0      
2013 07  14.48789  21 25 33.393  -18 46 02.18  22.0w 13NL24    F51  C~1vX0      
2013 07  14.50394  21 25 33.293  -18 46 02.68  22.1w 13NL24    F51  C~1vX1      
2013 07  14.51939  21 25 33.189  -18 46 03.19  22.2w 13NL24    F51  C~1vX1      
2013 07  14.53483  21 25 33.088  -18 46 03.68  22.3w 13NL24    F51  C~1vX1      
2013 08  29.35240  21 20 04.296  -19 10 00.61  22.0w 13NL24    F51  C~1vX1      
2013 08  29.36624  21 20 04.185  -19 10 00.83  22.1w 13NL24    F51  C~1vX1      
2013 08  29.38008  21 20 04.095  -19 10 01.20  22.3w 13NL24    F51  C~1vX1      
2013 08  29.39389  21 20 03.993  -19 10 01.35  22.2w 13NL24    F51  C~1vX1      
2015 07  14.48322  21 51 30.987  -16 12 03.64  22.3w 13NL24    F51  C~1vX1      
2015 07  14.50559  21 51 30.881  -16 12 04.37  22.1w 13NL24    F51  C~1vX1      
2015 07  14.51677  21 51 30.814  -16 12 04.71  22.1w 13NL24    F51  C~1vX1      

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    -0.01       0.00    -0.08
  2   0.0000     -1.51     0.01       0.10     0.01
  3   0.0001     -3.07    -0.00       0.24     0.14
  4   0.0001     -4.63    -0.02       0.08    -0.04
  5   1.0731   9610.18    -0.02     711.87    -0.12
  6   1.0731   9608.47    -0.20     712.47     0.40
  7   1.0732   9607.44     0.26     712.04    -0.10
  8   1.9686  26186.25    -0.02    1279.94     0.03
  9   1.9687  26184.72     0.05    1279.92     0.01
 10   1.9687  26183.13    -0.00    1279.91     0.00
 11   1.9688  26181.59    -0.01    1279.90     0.00
 12   2.0942  21237.60     0.03    1385.70    -0.28
 13   2.0943  21236.02    -0.10    1385.99    -0.08
 14   2.0943  21234.68     0.01    1386.03    -0.12
 15   2.0943  21233.25     0.03    1386.34     0.10
 16   3.9673  51149.60    -0.19    2550.40     0.14
 17   3.9673  51147.81     0.11    2550.25    -0.01
 18   3.9674  51146.72     0.07    2550.27     0.01

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.

13NL24    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        39.485    39.505    39.465
ecceobj         0.377     0.377     0.377
incobj          4.681     4.681     4.681
qmin           24.104    24.251    24.447
qmax           56.570    57.709    58.476
amean          39.281    40.209    40.522
amin           38.119    38.673    39.465
amax           40.598    41.256    41.746
emean           0.376     0.384     0.386
emin            0.353     0.360     0.369
emax            0.394     0.399     0.401
imean           4.900     5.017     4.894
imin            3.539     3.634     3.851
imax            6.594     7.844     6.711
excite_mean     0.386     0.395     0.395
fracstop        0.021     0.021     0.018
cjmean          2.875     2.874     2.875

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       153.6     187.5     168.7
kozaiamp        179.5     179.1     179.8