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 Mar 22 01:10:03 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   58 observations of   58
# Arc:   6.16y
# First observation: 2011/12/23
#  Last observation: 2018/02/20
# Chi-squared of fit:    51.42 DOF:  110 RMS:  0.17
# Min/Max residuals:    -0.65    0.56
# Exact a, adot, b, bdot, g, gdot:
  1.807027E-05  3.429991E-02 -5.646096E-06 -1.068103E-02  3.092533E-02  4.535908E-03
# Covariance matrix:
  3.7225E-13 -2.1058E-13 -8.0834E-14  5.8537E-14 -8.7097E-14 -7.5125E-13
 -2.1058E-13  1.4559E-13  6.1022E-14 -4.4028E-14  7.6728E-14  5.6464E-13
 -8.0834E-14  6.1022E-14  1.5649E-13 -4.7559E-14  3.3007E-14  2.5008E-13
  5.8537E-14 -4.4028E-14 -4.7559E-14  2.1786E-14 -2.1280E-14 -1.8115E-13
 -8.7097E-14  7.6728E-14  3.3007E-14 -2.1280E-14  2.1275E-13  2.6661E-13
 -7.5125E-13  5.6464E-13  2.5008E-13 -1.8115E-13  2.6661E-13  2.3249E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.546630   99.079637    0.134787    0.144662   -0.962393  2455918.877176
# Heliocentric elements and errors
Epoch:              2455918.5000  =  2011/12/23
Mean Anomaly:           30.53087 +/-     0.007
Argument of Peri:      108.51512 +/-     0.012
Long of Asc Node:      303.81183 +/-     0.000
Inclination:            19.05692 +/-     0.000
Eccentricity:         0.20103666 +/-    0.0001
Semi-Major Axis:     39.61326284 +/-    0.0028
Time of Perihelion: 2448195.3234 +/-       2.0
Perihelion:          31.64954466 +/-    0.0030
Aphelion:            47.57698102 +/-    0.0039
Period (y)              249.3269 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -5.06396066 +/-    0.0001
Ecliptic Y           32.55970295 +/-    0.0005
Ecliptic Z            4.80537370 +/-    0.0001
Ecliptic XDOT        -0.00308759 +/-    0.0000
Ecliptic YDOT         0.00005642 +/-    0.0000
Ecliptic ZDOT        -0.00087534 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.29961914 +/-    0.0005
Geocenter to KBO     32.33591054 +/-    0.0005
# Hcoef:  7.14

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.

2011 12  23.37641  06 42 15.267  +31 39 12.86  22.1G 14YG50    F51  C~2rYH      
2012 01  03.34691  06 40 56.150  +31 39 27.02  23.2G 14YG50    F51  C~2rYH      
2012 12  31.50519  06 50 06.200  +30 53 25.44  22.5G 14YG50    F51  C~2rYH      
2013 01  01.51402  06 49 58.978  +30 53 27.80  23.1G 14YG50    F51  C~2rYH      
2013 01  10.46715  06 48 55.232  +30 53 32.05  21.9G 14YG50    F51  C~2rYH      
2013 04  11.25775  06 44 27.790  +30 33 01.12  22.8G 14YG50    F51  C~2rYH      
2013 09  14.62090  07 03 08.248  +29 52 47.35  22.6G 14YG50    F51  C~2rYH      
2013 11  25.54628  07 02 35.657  +30 01 04.92  22.4G 14YG50    F51  C~2rYH      
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 11  20.63391  07 11 20.390  +29 10 16.80  22.5G 14YG50    F51  C~2rYH      
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  18.28845  07 05 16.683  +29 17 10.55  22.5G 14YG50    F51  C~2rYH      
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      
2015 01  28.32475  07 04 10.797  +29 17 05.89  22.5G 14YG50    F51  C~2rYH      
2015 09  17.59185  07 19 16.021  +28 14 35.33  23.1G 14YG50    F51  C~2rYH      
2015 12  04.62718  07 18 23.572  +28 21 16.90  22.4G 14YG50    F51  C~2rYH      
2016 02  09.26371  07 11 17.413  +28 26 45.58  22.2G 14YG50    F51  C~2rYH      
2016 02  09.27788  07 11 17.318  +28 26 45.53  22.5G 14YG50    F51  C~2rYH      
2016 02  09.29212  07 11 17.263  +28 26 45.40  21.9G 14YG50    F51  C~2rYH      
2016 02  09.30643  07 11 17.172  +28 26 45.50  22.3G 14YG50    F51  C~2rYH      
2017 01  28.43494  07 20 26.744  +27 35 43.96  22.4G 14YG50    F51  C~2rYH      
2017 01  28.44719  07 20 26.669  +27 35 43.30  22.9G 14YG50    F51  C~2rYH      
2017 01  28.45950  07 20 26.552  +27 35 43.69  23.0G 14YG50    F51  C~2rYH      
2017 01  28.47181  07 20 26.466  +27 35 43.58  22.8G 14YG50    F51  C~2rYH      
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      
2017 12  25.53683  07 32 02.799  +26 38 57.67  22.3G 14YG50    F51  C~2rYH      
2017 12  25.54894  07 32 02.729  +26 38 58.00  22.2G 14YG50    F51  C~2rYH      
2017 12  25.56105  07 32 02.644  +26 38 58.15  21.8G 14YG50    F51  C~2rYH      
2017 12  25.57317  07 32 02.567  +26 38 58.27  21.7G 14YG50    F51  C~2rYH      
2018 01  08.37682  07 30 31.852  +26 41 04.65  22.2G 14YG50    F51  C~2rYH      
2018 01  15.32999  07 29 45.114  +26 41 57.78  22.2G 14YG50    F51  C~2rYH      
2018 01  15.33129  07 29 45.097  +26 41 57.64  22.3G 14YG50    F51  C~2rYI      
2018 01  15.34250  07 29 45.013  +26 41 57.91  23.1G 14YG50    F51  C~2rYI      
2018 01  15.34379  07 29 45.001  +26 41 57.62  21.7G 14YG50    F51  C~2rYI      
2018 01  15.35499  07 29 44.940  +26 41 57.76  22.0G 14YG50    F51  C~2rYI      
2018 01  15.35628  07 29 44.931  +26 41 57.61  21.4G 14YG50    F51  C~2rYI      
2018 01  15.36747  07 29 44.867  +26 41 57.87  22.1G 14YG50    F51  C~2rYI      
2018 01  15.36876  07 29 44.843  +26 41 58.20  22.6G 14YG50    F51  C~2rYI      
2018 02  20.24791  07 26 10.657  +26 43 26.99  19.9G 14YG50    F51  C~2rYI      
2018 02  20.27293  07 26 10.566  +26 43 27.07  22.9G 14YG50    F51  C~2rYI      

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    -0.13       0.00     0.05
  2   0.0300      0.00    -0.11       0.00    -0.10
  3   1.0243      0.00     0.20       0.00    -0.19
  4   1.0271      0.00     0.05       0.00     0.14
  5   1.0516      0.00    -0.25       0.00    -0.36
  6   1.3002      0.00     0.26       0.00    -0.07
  7   1.7283      0.00     0.11       0.00    -0.03
  8   1.9252      0.00     0.35       0.00    -0.18
  9   1.9495      0.00    -0.20       0.00     0.07
 10   1.9495      0.00    -0.18       0.00    -0.04
 11   1.9496      0.00    -0.14       0.00     0.10
 12   1.9496      0.00     0.04       0.00     0.27
 13   2.0096      0.00    -0.13       0.00     0.05
 14   2.0096      0.00    -0.00       0.00    -0.00
 15   2.0096      0.00    -0.12       0.00     0.07
 16   2.0096      0.00     0.04       0.00     0.09
 17   2.0097      0.00    -0.09       0.00    -0.06
 18   2.0097      0.00     0.02       0.00     0.10
 19   2.9110      0.00     0.01       0.00     0.05
 20   3.0093      0.00    -0.02       0.00     0.07
 21   3.0093      0.00     0.05       0.00    -0.05
 22   3.0094      0.00     0.10       0.00     0.07
 23   3.0716      0.00    -0.27       0.00     0.10
 24   3.0772      0.00     0.22       0.00     0.06
 25   3.0772      0.00     0.09       0.00     0.01
 26   3.0773      0.00     0.00       0.00    -0.05
 27   3.0773      0.00    -0.03       0.00    -0.11
 28   3.0826      0.00     0.05       0.00     0.08
 29   3.0826      0.00    -0.09       0.00    -0.01
 30   3.0827      0.00     0.06       0.00     0.04
 31   3.0991      0.00    -0.06       0.00     0.05
 32   3.7350      0.00    -0.29       0.00     0.22
 33   3.9487      0.00     0.00       0.00    -0.20
 34   4.1311      0.00     0.01       0.00    -0.09
 35   4.1311      0.00    -0.22       0.00    -0.10
 36   4.1312      0.00     0.16       0.00    -0.19
 37   4.1312      0.00     0.01       0.00    -0.04
 38   5.1008      0.00     0.48       0.00     0.56
 39   5.1008      0.00     0.54       0.00    -0.12
 40   5.1008      0.00    -0.03       0.00     0.25
 41   5.1009      0.00    -0.13       0.00     0.12
 42   5.9934      0.00     0.11       0.00     0.04
 43   5.9935      0.00     0.04       0.00     0.00
 44   6.0073      0.00     0.01       0.00    -0.18
 45   6.0073      0.00     0.14       0.00     0.03
 46   6.0074      0.00     0.04       0.00     0.06
 47   6.0074      0.00     0.05       0.00     0.07
 48   6.0452      0.00     0.01       0.00    -0.14
 49   6.0642      0.00     0.08       0.00     0.08
 50   6.0642      0.00    -0.04       0.00    -0.07
 51   6.0642      0.00    -0.16       0.00     0.12
 52   6.0643      0.00    -0.20       0.00    -0.18
 53   6.0643      0.00     0.03       0.00    -0.12
 54   6.0643      0.00     0.02       0.00    -0.28
 55   6.0643      0.00     0.21       0.00    -0.10
 56   6.0643      0.00    -0.02       0.00     0.22
 57   6.1626      0.00    -0.65       0.00    -0.14
 58   6.1626      0.00    -0.20       0.00    -0.00

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        39.757    39.757    39.757
ecceobj         0.204     0.204     0.204
incobj         19.058    19.058    19.058
qmin           27.191    27.190    27.192
qmax           52.386    52.350    52.417
amean          39.454    39.455    39.455
amin           39.001    39.000    39.001
amax           39.988    39.989    39.988
emean           0.254     0.254     0.254
emin            0.179     0.179     0.179
emax            0.311     0.311     0.312
imean          18.082    18.080    18.084
imin           15.671    15.666    15.675
imax           20.865    20.865    20.865
excite_mean     0.403     0.403     0.403
fracstop        1.000     1.000     1.000
cjmean          2.866     2.866     2.866

libcent 0       178.8     178.9     178.7
libamp  0        91.7      91.8      91.6
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        89.4      89.5      89.4
kozaiamp         71.5      71.5      71.4