Orbit Fit and Astrometric record for 14YL50

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: 14YL50    
# Created Mon Oct 23 01:38:33 2017
# Orbit generated from Bernstein formalism
# Fitting   10 observations of   10
# Arc:   0.99y
# First observation: 2014/12/16
#  Last observation: 2015/12/14
Preliminary a, adot, b, bdot, g, gdot:
   0.000026   0.030250  -0.000024  -0.003152   0.026963   0.000000
# Chi-squared of fit:     6.08 DOF:   14 RMS:  0.14
# Min/Max residuals:    -0.32    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.972285E-05  3.031525E-02 -1.355320E-06 -3.198805E-03  2.637047E-02  2.298579E-03
# Covariance matrix:
  3.0671E-13  4.0822E-12 -1.0255E-13 -3.8699E-13  3.0627E-12  1.4675E-10
  4.0822E-12  5.4475E-10 -1.0216E-11 -5.3647E-11  3.0996E-10  1.8088E-08
 -1.0255E-13 -1.0216E-11  4.6583E-13  7.0141E-13 -6.4361E-12 -3.4205E-10
 -3.8699E-13 -5.3647E-11  7.0141E-13  6.0322E-12 -2.9345E-11 -1.7786E-09
  3.0627E-12  3.0996E-10 -6.4361E-12 -2.9345E-11  1.9384E-10  1.0372E-08
  1.4675E-10  1.8088E-08 -3.4205E-10 -1.7786E-09  1.0372E-08  6.0157E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
  -29.063882   24.844655   -0.842250   -0.246617   -0.444156  2457007.684690
# Heliocentric elements and errors
Epoch:              2457000.5000  =  2014/12/09
Mean Anomaly:           11.36086 +/-     2.626
Argument of Peri:      237.35927 +/-     5.587
Long of Asc Node:      127.47569 +/-     0.025
Inclination:            29.15513 +/-     0.002
Eccentricity:         0.31695569 +/-    0.0115
Semi-Major Axis:     55.12028673 +/-    0.3644
Time of Perihelion: 2452283.4061 +/-    1089.1
Perihelion:          37.64959848 +/-    0.6807
Aphelion:            72.59097499 +/-    0.7949
Period (y)              409.2375 +/-      4.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.18246732 +/-    0.0159
Ecliptic Y           14.90601195 +/-    0.0073
Ecliptic Z          -18.42164259 +/-    0.0097
Ecliptic XDOT        -0.00128360 +/-    0.0001
Ecliptic YDOT         0.00287083 +/-    0.0000
Ecliptic ZDOT        -0.00040612 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.37352527 +/-    0.0136
Geocenter to KBO     37.92120189 +/-    0.0200
# Hcoef:  7.50

The following table shows the complete astrometric record for 14YL50. 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 (14YL50) followed by the observatory code and reference code for the source of the astrometry.

2014 12  16.183912 02 15 02.32   -17 26 03.9   22.9r 14YL50    W84  C~1yHA      
2014 12  16.185266 02 15 02.34   -17 26 03.5   22.9i 14YL50    W84  C~1yHA      
2014 12  20.168692 02 14 50.95   -17 24 23.9   23.6g 14YL50    W84  C~1yHA      
2014 12  20.170069 02 14 50.93   -17 24 23.8   22.8i 14YL50    W84  C~1yHA      
2014 12  24.163310 02 14 40.94   -17 22 29.9   23.4g 14YL50    W84  C~1yHA      
2014 12  29.142049 02 14 30.52   -17 19 48.6   23.1z 14YL50    W84  C~1yHA      
2015 11  21.113588 02 23 43.95   -17 00 50.8   22.1z 14YL50    W84  C~1yHA      
2015 12  14.185567 02 22 08.95   -16 57 21.5   22.4i 14YL50    W84  C~1yHA      
2015 12  14.186944 02 22 08.95   -16 57 21.5   22.8r 14YL50    W84  C~1yHA      
2015 12  14.188287 02 22 08.93   -16 57 21.7   23.4g 14YL50    W84  C~1yHA      

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    -0.32       0.00    -0.12
  2   0.0000      0.42     0.14       0.26     0.09
  3   0.0109   -112.82     0.15     154.12    -0.06
  4   0.0109   -113.04    -0.04     154.32     0.09
  5   0.0218   -202.38     0.18     313.83    -0.18
  6   0.0355   -279.57    -0.10     519.54     0.19
  7   0.9307   7485.66    -0.07   -1469.83    -0.12
  8   0.9938   6309.21     0.08    -747.91     0.11
  9   0.9938   6309.21     0.14    -747.91     0.06
 10   0.9939   6308.87    -0.16    -747.98    -0.06

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.

14YL50    quality flag:2

Type:         5:2EEE  SCATNEAR  SCATNEAR

axisobj        55.866    57.874    54.848
ecceobj         0.326     0.372     0.299
incobj         29.139    29.146    29.132
qmin           36.193    35.122    37.806
qmax           76.056    80.380    71.414
amean          55.461    57.247    54.264
amin           54.730    56.627    53.750
amax           56.361    58.091    54.900
emean           0.325     0.367     0.284
emin            0.302     0.347     0.269
emax            0.350     0.386     0.301
imean          27.505    27.535    27.848
imin           26.750    26.936    27.422
imax           28.109    28.325    28.266
excite_mean     0.565     0.590     0.547
fracstop        1.000     1.000     1.000
cjmean          2.821     2.802     2.831

libcent 0       180.1    -180.0    -180.0
libamp  0       155.7    -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       181.3     205.4     194.3
kozaiamp        180.0     180.0     180.0