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 Wed Dec 13 02:38:09 2017
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   20
# Arc:   1.13y
# First observation: 2013/12/04
#  Last observation: 2015/01/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000009   0.033426  -0.000002  -0.010765   0.030582   0.000000
# Chi-squared of fit:     3.39 DOF:   34 RMS:  0.07
# Min/Max residuals:    -0.13    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.761198E-05  3.341023E-02 -5.562549E-06 -1.078851E-02  3.053291E-02  5.100948E-03
# Covariance matrix:
  3.6717E-13  1.1666E-12  6.4397E-15 -5.3093E-13  1.2775E-12  4.4262E-11
  1.1666E-12  1.0595E-11  8.5017E-14 -4.6912E-12  8.3914E-12  3.9177E-10
  6.4397E-15  8.5017E-14  1.5717E-13 -1.8977E-13  4.8306E-14  3.7485E-12
 -5.3093E-13 -4.6912E-12 -1.8977E-13  2.4746E-12 -3.5017E-12 -1.8553E-10
  1.2775E-12  8.3914E-12  4.8306E-14 -3.5017E-12  7.8245E-12  2.9206E-10
  4.4262E-11  3.9177E-10  3.7485E-12 -1.8553E-10  2.9206E-10  1.5503E-08
#      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:           32.63405 +/-     0.406
Argument of Peri:      109.55987 +/-     0.751
Long of Asc Node:      303.85286 +/-     0.001
Inclination:            19.02780 +/-     0.001
Eccentricity:         0.19987861 +/-    0.0030
Semi-Major Axis:     39.66545344 +/-    0.0500
Time of Perihelion: 2448358.9748 +/-     101.6
Perihelion:          31.73717791 +/-    0.1262
Aphelion:            47.59372897 +/-    0.1339
Period (y)              249.8198 +/-      0.47
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -7.25216734 +/-    0.0007
Ecliptic Y           32.53301202 +/-    0.0029
Ecliptic Z            4.17299929 +/-    0.0004
Ecliptic XDOT        -0.00305403 +/-    0.0000
Ecliptic YDOT        -0.00013739 +/-    0.0000
Ecliptic ZDOT        -0.00090108 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.59173597 +/-    0.0028
Geocenter to KBO     32.75154918 +/-    0.0030
# Hcoef:  7.02

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      

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    -0.01
  2   0.0000     -1.05    -0.04      -0.09    -0.12
  3   0.0001     -2.11    -0.02       0.07     0.02
  4   0.0001     -3.05     0.12       0.28     0.22
  5   0.0601  -1850.69    -0.08     -30.53    -0.02
  6   0.0601  -1850.63     0.04     -30.58    -0.06
  7   0.0601  -1852.09    -0.06     -30.58    -0.00
  8   0.0601  -1852.02     0.07     -30.54     0.04
  9   0.0602  -1853.47    -0.02     -30.76    -0.13
 10   0.0602  -1853.46     0.05     -30.59     0.04
 11   1.0598   5066.44    -0.06   -2251.35     0.05
 12   1.0598   5065.40     0.01   -2251.51    -0.07
 13   1.0599   5064.31     0.04   -2251.44     0.06
 14   1.1277   2829.44     0.15   -2420.93     0.07
 15   1.1277   2828.27     0.04   -2421.10     0.01
 16   1.1278   2827.15    -0.03   -2421.28    -0.06
 17   1.1278   2826.06    -0.05   -2421.47    -0.13
 18   1.1331   2658.03    -0.00   -2440.23     0.07
 19   1.1331   2656.88    -0.11   -2440.44    -0.03
 20   1.1332   2655.96     0.01   -2440.49     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.

14YG50    quality flag:3

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

axisobj        39.744    39.929    39.570
ecceobj         0.203     0.212     0.194
incobj         19.058    19.055    19.060
qmin           27.129    30.614    31.540
qmax           52.443    49.119    48.029
amean          39.455    39.456    39.456
amin           39.005    38.954    38.926
amax           40.007    40.052    40.019
emean           0.255     0.205     0.174
emin            0.178     0.182     0.139
emax            0.312     0.228     0.202
imean          17.950    20.357    20.851
imin           15.434    19.807    20.181
imax           20.866    20.921    21.625
excite_mean     0.403     0.404     0.396
fracstop        1.000     1.000     1.000
cjmean          2.866     2.863     2.868

libcent 0       179.3     180.6     179.5
libamp  0        89.8     120.7     130.1
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        86.8     150.7     158.6
kozaiamp         75.9     180.0     179.9