Orbit Fit and Astrometric record for 14YK50

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: 14YK50    
# Created Tue Oct 24 01:38:32 2017
# Orbit generated from Bernstein formalism
# Fitting   23 observations of   23
# Arc:   3.21y
# First observation: 2012/02/20
#  Last observation: 2015/05/06
Preliminary a, adot, b, bdot, g, gdot:
  -0.000148   0.029399   0.000085  -0.014413   0.025536   0.000000
# Chi-squared of fit:     7.64 DOF:   40 RMS:  0.10
# Min/Max residuals:    -0.22    0.21
# Exact a, adot, b, bdot, g, gdot:
  1.891765E-05  2.916544E-02 -9.840361E-06 -1.429024E-02  2.555786E-02 -4.321096E-03
# Covariance matrix:
  3.5936E-13 -2.4758E-13 -8.2165E-15  6.3596E-14 -8.8910E-14 -1.4364E-12
 -2.4758E-13  2.1874E-12  1.4441E-13 -1.0576E-12  1.8845E-12  2.4051E-11
 -8.2165E-15  1.4441E-13  3.5714E-13 -1.9243E-13  1.2914E-13  1.6252E-12
  6.3596E-14 -1.0576E-12 -1.9243E-13  5.7534E-13 -9.2848E-13 -1.1911E-11
 -8.8910E-14  1.8845E-12  1.2914E-13 -9.2848E-13  1.7778E-12  2.1165E-11
 -1.4364E-12  2.4051E-11  1.6252E-12 -1.1911E-11  2.1165E-11  2.7084E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   15.056428 -178.939761    0.493329    0.223174   -0.829577  2455977.951456
# Heliocentric elements and errors
Epoch:              2455970.5000  =  2012/02/13
Mean Anomaly:          356.97546 +/-     0.010
Argument of Peri:      169.12335 +/-     0.067
Long of Asc Node:       27.82460 +/-     0.000
Inclination:            29.66849 +/-     0.000
Eccentricity:         0.66798302 +/-    0.0004
Semi-Major Axis:    117.42704276 +/-    0.1135
Time of Perihelion: 2459875.3742 +/-      12.2
Perihelion:          38.98777190 +/-    0.0565
Aphelion:           195.86631362 +/-    0.1939
Period (y)             1272.5076 +/-      1.84
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -38.64235100 +/-    0.0020
Ecliptic Y           -0.22097235 +/-    0.0000
Ecliptic Z           10.16362514 +/-    0.0005
Ecliptic XDOT         0.00010247 +/-    0.0000
Ecliptic YDOT        -0.00311866 +/-    0.0000
Ecliptic ZDOT        -0.00159842 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.95721957 +/-    0.0019
Geocenter to KBO     39.12690470 +/-    0.0020
# Hcoef:  5.82

The following table shows the complete astrometric record for 14YK50. 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 (14YK50) followed by the observatory code and reference code for the source of the astrometry.

2012 02  20.45069  12 28 16.490  +13 22 09.53  21.6w 14YK50    F51  C~1vY0      
2012 02  20.46598  12 28 16.436  +13 22 09.65  21.8w 14YK50    F51  C~1vY0      
2012 02  20.48128  12 28 16.381  +13 22 10.12  21.8w 14YK50    F51  C~1vY0      
2012 02  20.49669  12 28 16.318  +13 22 10.46  22.1w 14YK50    F51  C~1vY0      
2014 05  29.32025  12 31 13.410  +10 49 11.29  21.7w 14YK50    F51  C~1vY0      
2014 05  29.33209  12 31 13.395  +10 49 10.82  21.9w 14YK50    F51  C~1vY0      
2014 05  29.34396  12 31 13.378  +10 49 10.74  21.6w 14YK50    F51  C~1vY0      
2014 05  29.35581  12 31 13.346  +10 49 10.67  21.8w 14YK50    F51  C~1vY0      
2014 12  29.61244  12 44 02.253  +08 44 40.30  21.9w 14YK50    F51  C~1vY0      
2014 12  29.62538  12 44 02.273  +08 44 40.36  21.9w 14YK50    F51  C~1vY0      
2014 12  29.63846  12 44 02.297  +08 44 40.57  22.0w 14YK50    F51  C~1vY0      
2014 12  29.65164  12 44 02.299  +08 44 40.43  21.8w 14YK50    F51  C~1vY0      
2015 01  28.51832  12 43 54.463  +08 51 05.97  22.1w 14YK50    F51  C~1vY0      
2015 01  28.53001  12 43 54.445  +08 51 06.29  21.9w 14YK50    F51  C~1vY0      
2015 01  28.54169  12 43 54.426  +08 51 06.40  21.9w 14YK50    F51  C~1vY0      
2015 01  28.55339  12 43 54.408  +08 51 06.71  22.0w 14YK50    F51  C~1vY0      
2015 02  18.44210  12 43 00.328  +08 59 19.76  21.8w 14YK50    F51  C~1vY0      
2015 02  18.45320  12 43 00.300  +08 59 20.08  21.8w 14YK50    F51  C~1vY0      
2015 02  18.46398  12 43 00.266  +08 59 20.48  22.1w 14YK50    F51  C~1vY0      
2015 02  18.47477  12 43 00.211  +08 59 20.71  21.7w 14YK50    F51  C~1vY0      
2015 05  06.26945  12 37 16.094  +09 24 07.64  21.3i 14YK50    F51  C~1vY0      
2015 05  06.28065  12 37 16.042  +09 24 07.44  21.2i 14YK50    F51  C~1vY0      
2015 05  06.29193  12 37 15.992  +09 24 07.57  21.1i 14YK50    F51  C~1vY0      

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    -0.18       0.00     0.21
  2   0.0000     -0.77     0.02      -0.21    -0.06
  3   0.0001     -1.69     0.07      -0.11    -0.02
  4   0.0001     -2.67     0.07      -0.18    -0.14
  5   2.2693   6134.50    -0.20   -7312.32     0.07
  6   2.2694   6134.49     0.06   -7312.84    -0.13
  7   2.2694   6134.29     0.14   -7313.02     0.02
  8   2.2694   6133.89     0.02   -7313.28     0.08
  9   2.8560  19648.08    -0.03   -9401.05    -0.03
 10   2.8561  19648.32     0.04   -9400.87     0.00
 11   2.8561  19648.56     0.10   -9400.52     0.20
 12   2.8561  19648.65     0.02   -9400.64    -0.06
 13   2.9379  19377.74     0.00   -9097.25    -0.11
 14   2.9379  19377.36     0.00   -9097.07    -0.01
 15   2.9380  19377.05     0.08   -9097.09    -0.12
 16   2.9380  19376.68     0.09   -9096.92    -0.04
 17   2.9952  18433.29    -0.14   -8983.96    -0.02
 18   2.9952  18432.78    -0.01   -8983.84     0.07
 19   2.9952  18432.15    -0.01   -8983.69     0.20
 20   2.9953  18431.30    -0.22   -8983.82     0.05
 21   3.2055  13145.77     0.06   -9757.74     0.10
 22   3.2056  13145.15     0.05   -9758.24    -0.16
 23   3.2056  13144.42    -0.07   -9758.43    -0.10

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.

14YK50    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       116.849   117.121   116.581
ecceobj         0.666     0.667     0.665
incobj         29.677    29.678    29.676
qmin           36.276    36.280    37.537
qmax          206.397   206.907   204.432
amean         118.140   118.359   117.915
amin          115.772   116.088   115.522
amax          121.911   122.432   121.607
emean           0.677     0.677     0.670
emin            0.662     0.662     0.661
emax            0.693     0.694     0.681
imean          28.435    28.511    29.250
imin           27.411    27.441    28.772
imax           29.750    29.730    29.736
excite_mean     0.828     0.828     0.829
fracstop        1.000     1.000     1.000
cjmean          2.818     2.818     2.819

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       223.8     220.1     203.9
kozaiamp         54.3      51.9      36.1