Orbit Fit and Astrometric record for 14YD50

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: 14YD50    
# Created Sat Oct 21 01:38:32 2017
# Orbit generated from Bernstein formalism
# Fitting   13 observations of   13
# Arc:  89.76d
# First observation: 2014/12/18
#  Last observation: 2015/03/18
Preliminary a, adot, b, bdot, g, gdot:
  -0.000014   0.053782   0.000029  -0.001938   0.032216   0.000000
# Chi-squared of fit:     5.38 DOF:   20 RMS:  0.11
# Min/Max residuals:    -0.24    0.25
# Exact a, adot, b, bdot, g, gdot:
  2.211026E-05  4.199612E-02 -9.631228E-07 -1.467999E-03  3.030518E-02 -2.818660E-03
# Covariance matrix:
  4.9045E-13  2.3178E-12  9.3389E-15 -1.6562E-13  1.0461E-12  4.7790E-11
  2.3178E-12  7.0536E-09  1.8250E-11 -2.7915E-10  8.8023E-10 -7.1054E-08
  9.3389E-15  1.8250E-11  4.8690E-13 -2.8522E-12  2.2596E-12 -1.8841E-10
 -1.6562E-13 -2.7915E-10 -2.8522E-12  2.4969E-11 -3.4795E-11  2.8381E-09
  1.0461E-12  8.8023E-10  2.2596E-12 -3.4795E-11  1.1505E-10 -7.9409E-09
  4.7790E-11 -7.1054E-08 -1.8841E-10  2.8381E-09 -7.9409E-09  8.9551E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
  -10.485977  117.181389    0.506420   -0.153234   -0.828820  2457010.074588
# Heliocentric elements and errors
Epoch:              2457010.5000  =  2014/12/19
Mean Anomaly:          358.19217 +/-     0.463
Argument of Peri:      270.16396 +/-     3.112
Long of Asc Node:      218.22071 +/-     0.037
Inclination:            10.44438 +/-     0.001
Eccentricity:         0.66347375 +/-    0.0112
Semi-Major Axis:     99.67623472 +/-    2.8327
Time of Perihelion: 2458835.8325 +/-     461.0
Perihelion:          33.54366953 +/-    1.4658
Aphelion:           165.80879991 +/-    4.8418
Period (y)              995.1662 +/-     42.42
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -14.75985971 +/-    0.0052
Ecliptic Y           29.84504436 +/-    0.0102
Ecliptic Z           -6.00546671 +/-    0.0021
Ecliptic XDOT        -0.00325370 +/-    0.0000
Ecliptic YDOT        -0.00198252 +/-    0.0001
Ecliptic ZDOT        -0.00008397 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.83261388 +/-    0.0093
Geocenter to KBO     32.99766007 +/-    0.0117
# Hcoef:  6.65

The following table shows the complete astrometric record for 14YD50. 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 (14YD50) followed by the observatory code and reference code for the source of the astrometry.

2014 12  18.57381  07 48 42.165  +10 25 32.89  22.0r 14YD50    F51  C~1vXz      
2014 12  18.58490  07 48 42.107  +10 25 33.01  21.8r 14YD50    F51  C~1vXz      
2014 12  18.59598  07 48 42.066  +10 25 32.70  22.1r 14YD50    F51  C~1vXz      
2015 02  18.23747  07 43 11.692  +10 39 52.24  22.0w 14YD50    F51  C~1vXz      
2015 02  18.24951  07 43 11.635  +10 39 52.24  22.2w 14YD50    F51  C~1vXz      
2015 02  18.26148  07 43 11.570  +10 39 52.30  22.3w 14YD50    F51  C~1vXz      
2015 02  19.25104  07 43 07.254  +10 40 13.99  22.2w 14YD50    F51  C~1vXz      
2015 02  19.26307  07 43 07.184  +10 40 14.05  21.9w 14YD50    F51  C~1vXz      
2015 02  19.27520  07 43 07.134  +10 40 14.39  22.1w 14YD50    F51  C~1vXz      
2015 03  18.29472  07 41 42.898  +10 49 59.02  21.7w 14YD50    F51  C~1vXz      
2015 03  18.30729  07 41 42.893  +10 49 59.30  21.9w 14YD50    F51  C~1vXz      
2015 03  18.31964  07 41 42.864  +10 49 59.39  21.9w 14YD50    F51  C~1vXz      
2015 03  18.33208  07 41 42.840  +10 49 59.70  22.0w 14YD50    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    -0.04       0.00     0.04
  2   0.0000     -0.86    -0.11      -0.04     0.13
  3   0.0001     -1.40     0.15      -0.46    -0.16
  4   0.1688  -4949.30    -0.02     -45.01     0.25
  5   0.1689  -4950.13    -0.01     -45.16    -0.02
  6   0.1689  -4951.08    -0.13     -45.28    -0.24
  7   0.1716  -5017.61     0.18     -35.42     0.14
  8   0.1716  -5018.63    -0.03     -35.54    -0.11
  9   0.1717  -5019.42     0.02     -35.34    -0.02
 10   0.2456  -6346.68    -0.16     316.71     0.03
 11   0.2457  -6346.80     0.10     316.97     0.09
 12   0.2457  -6347.24     0.04     316.98    -0.08
 13   0.2457  -6347.64     0.01     317.23    -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.

14YD50    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        98.913   105.049    95.855
ecceobj         0.660     0.684     0.648
incobj         10.425    10.422    10.428
qmin           32.559    32.248    32.869
qmax          169.024   185.792   167.741
amean          96.818   102.881    95.451
amin           93.075    97.512    89.901
amax          101.234   109.730   100.939
emean           0.651     0.673     0.643
emin            0.633     0.653     0.617
emax            0.670     0.693     0.662
imean          11.605    12.607    12.123
imin           10.377    11.044    10.891
imax           13.165    14.248    13.573
excite_mean     0.682     0.708     0.677
fracstop        1.000     1.000     1.000
cjmean          2.976     2.959     2.981

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       196.0     168.4     180.7
kozaiamp        180.0     180.0     179.9