Orbit Fit and Astrometric record for 14YG50

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: 14YG50    
# Created Fri Nov 16 02:09:57 2018
# Orbit generated from Bernstein formalism
# Fitting   22 observations of   22
# Arc:   4.04y
# First observation: 2013/12/04
#  Last observation: 2017/12/20
Preliminary a, adot, b, bdot, g, gdot:
  -0.000051   0.033088  -0.000043  -0.010668   0.030068   0.000000
# Chi-squared of fit:     3.59 DOF:   38 RMS:  0.07
# Min/Max residuals:    -0.14    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.773805E-05  3.341135E-02 -5.594537E-06 -1.078892E-02  3.053378E-02  5.142852E-03
# Covariance matrix:
  2.4302E-13  6.7121E-14  6.3286E-15 -3.2063E-14  4.5724E-13  7.9331E-13
  6.7121E-14  8.5626E-13  7.8604E-14 -2.5760E-13  1.1337E-12  6.3917E-12
  6.3286E-15  7.8604E-14  1.1638E-13 -7.2687E-14  9.8838E-14  6.3084E-13
 -3.2063E-14 -2.5760E-13 -7.2687E-14  1.3653E-13 -3.5222E-13 -2.0561E-12
  4.5724E-13  1.1337E-12  9.8838E-14 -3.5222E-13  2.3406E-12  8.7340E-12
  7.9331E-13  6.3917E-12  6.3084E-13 -2.0561E-12  8.7340E-12  5.1020E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    7.320548  103.443694    0.510969    0.107224   -0.833685  2456630.930498
# Heliocentric elements and errors
Epoch:              2456630.5000  =  2013/12/04
Mean Anomaly:           32.74855 +/-     0.033
Argument of Peri:      109.30703 +/-     0.059
Long of Asc Node:      303.85334 +/-     0.000
Inclination:            19.02739 +/-     0.000
Eccentricity:         0.20088915 +/-    0.0001
Semi-Major Axis:     39.68165333 +/-    0.0063
Time of Perihelion: 2448324.8685 +/-       8.2
Perihelion:          31.71003955 +/-    0.0074
Aphelion:            47.65326711 +/-    0.0093
Period (y)              249.9728 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -7.25195451 +/-    0.0004
Ecliptic Y           32.53210398 +/-    0.0016
Ecliptic Z            4.17287843 +/-    0.0002
Ecliptic XDOT        -0.00305491 +/-    0.0000
Ecliptic YDOT        -0.00013378 +/-    0.0000
Ecliptic ZDOT        -0.00090062 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.59079559 +/-    0.0015
Geocenter to KBO     32.75060875 +/-    0.0016
# Hcoef:  7.04

The following table shows the complete astrometric record for 14YG50. 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 (14YG50) followed by the observatory code and reference code for the source of the astrometry.

2013 12  04.42972  07 01 47.748  +30 02 30.07  22.6w 14YG50    F51  C~1vXz      
2013 12  04.44367  07 01 47.667  +30 02 30.09  22.4w 14YG50    F51  C~1vXz      
2013 12  04.45766  07 01 47.587  +30 02 30.36  22.3w 14YG50    F51  C~1vXz      
2013 12  04.47165  07 01 47.517  +30 02 30.67  22.4w 14YG50    F51  C~1vXz      
2013 12  26.37431  06 59 25.725  +30 05 12.65  22.1w 14YG50    F51  C~1vXz      
2013 12  26.37499  06 59 25.729  +30 05 12.60  22.1w 14YG50    F51  C~1vXz      
2013 12  26.38973  06 59 25.617  +30 05 12.75  22.4w 14YG50    F51  C~1vXz      
2013 12  26.39042  06 59 25.623  +30 05 12.78  22.2w 14YG50    F51  C~1vXz      
2013 12  26.40517  06 59 25.510  +30 05 12.71  22.6w 14YG50    F51  C~1vXz      
2013 12  26.40585  06 59 25.512  +30 05 12.87  22.4w 14YG50    F51  C~1vXz      
2014 12  26.52041  07 07 54.228  +29 15 39.28  22.2w 14YG50    F51  C~1vXz      
2014 12  26.53273  07 07 54.147  +29 15 39.24  22.5w 14YG50    F51  C~1vXz      
2014 12  26.54502  07 07 54.065  +29 15 39.44  22.4w 14YG50    F51  C~1vXz      
2015 01  20.32299  07 05 02.989  +29 17 12.01  21.9w 14YG50    F51  C~1vXz      
2015 01  20.33492  07 05 02.899  +29 17 11.97  22.3w 14YG50    F51  C~1vXz      
2015 01  20.34682  07 05 02.812  +29 17 11.92  22.2w 14YG50    F51  C~1vXz      
2015 01  20.35877  07 05 02.728  +29 17 11.86  22.2w 14YG50    F51  C~1vXz      
2015 01  22.29898  07 04 49.807  +29 17 12.29  22.5w 14YG50    F51  C~1vXz      
2015 01  22.31086  07 04 49.718  +29 17 12.21  22.5w 14YG50    F51  C~1vXz      
2015 01  22.32274  07 04 49.648  +29 17 12.26  22.4w 14YG50    F51  C~1vXz      
2017 12  20.47108  07 32 34.360  +26 38 06.62  22.4R 14YG50    G37  C~2Uxt      
2017 12  20.51274  07 32 34.098  +26 38 06.99        14YG50    G37  C~2Uxt      

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    -0.09       0.00     0.00
  2   0.0000     -1.05    -0.06      -0.09    -0.11
  3   0.0001     -2.11    -0.05       0.07     0.03
  4   0.0001     -3.05     0.10       0.28     0.22
  5   0.0601  -1850.69    -0.06     -30.53    -0.01
  6   0.0601  -1850.63     0.06     -30.58    -0.05
  7   0.0601  -1852.09    -0.04     -30.58     0.01
  8   0.0601  -1852.02     0.09     -30.54     0.05
  9   0.0602  -1853.47    -0.00     -30.76    -0.12
 10   0.0602  -1853.46     0.07     -30.59     0.05
 11   1.0598   5066.44    -0.04   -2251.35     0.04
 12   1.0598   5065.40     0.03   -2251.51    -0.07
 13   1.0599   5064.31     0.06   -2251.44     0.06
 14   1.1277   2829.44     0.14   -2420.93     0.06
 15   1.1277   2828.27     0.03   -2421.10    -0.00
 16   1.1278   2827.15    -0.04   -2421.28    -0.07
 17   1.1278   2826.06    -0.06   -2421.47    -0.14
 18   1.1331   2658.03    -0.02   -2440.23     0.05
 19   1.1331   2656.88    -0.13   -2440.44    -0.04
 20   1.1332   2655.96    -0.00   -2440.49     0.02
 21   4.0439  25991.66     0.03   -8799.50     0.04
 22   4.0440  25988.08    -0.03   -8799.73    -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.

14YG50    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.761    39.780    39.742
ecceobj         0.204     0.204     0.204
incobj         19.057    19.058    19.057
qmin           27.188    26.988    27.029
qmax           52.434    52.469    52.553
amean          39.455    39.455    39.454
amin           39.004    39.001    38.992
amax           39.998    40.006    40.011
emean           0.253     0.255     0.254
emin            0.179     0.179     0.179
emax            0.311     0.313     0.314
imean          18.090    17.996    18.066
imin           15.694    15.423    15.440
imax           20.865    20.862    20.864
excite_mean     0.403     0.403     0.403
fracstop        1.000     1.000     1.000
cjmean          2.866     2.866     2.866

libcent 0       179.2     180.0     180.9
libamp  0        90.5      88.9      88.0
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        89.5      89.2      89.7
kozaiamp         71.1      72.7      69.7