Orbit Fit and Astrometric record for 13UX18

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: 13UX18    
# Created Wed Dec 25 02:09:44 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     43 observations of     43
# Arc:   6.23y
# First observation: 2013/08/02
#  Last observation: 2019/10/26
# Chi-squared of fit:    10.95 DOF:     80 RMS:  0.09
# Min/Max residuals:    -0.27    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.402777E-05  2.001238E-02  4.060152E-07  4.206831E-04  2.208638E-02  1.031342E-03
# Covariance matrix:
  1.2527E-13 -5.0412E-14  1.4518E-15 -7.7934E-16  6.7366E-14 -4.1746E-13
 -5.0412E-14  1.6559E-13 -6.5620E-16  2.9971E-15  5.8747E-14  1.4899E-12
  1.4518E-15 -6.5620E-16  4.9008E-14 -1.7575E-14  1.2613E-15 -8.2539E-15
 -7.7934E-16  2.9971E-15 -1.7575E-14  2.0221E-14  1.0909E-15  3.0824E-14
  6.7366E-14  5.8747E-14  1.2613E-15  1.0909E-15  1.1815E-13  5.0711E-13
 -4.1746E-13  1.4899E-12 -8.2539E-15  3.0824E-14  5.0711E-13  1.5358E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.672484   16.516483    0.931820   -0.018941   -0.406420  2456507.024878
# Heliocentric elements and errors
Epoch:              2456506.5000  =  2013/08/02
Mean Anomaly:          146.61392 +/-     0.187
Argument of Peri:      143.49640 +/-     0.185
Long of Asc Node:       81.96886 +/-     0.007
Inclination:             2.88455 +/-     0.000
Eccentricity:         0.05438889 +/-    0.0001
Semi-Major Axis:     43.67330705 +/-    0.0026
Time of Perihelion: 2413573.1027 +/-      54.9
Perihelion:          41.29796418 +/-    0.0042
Aphelion:            46.04864992 +/-    0.0044
Period (y)              288.6239 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           44.01610406 +/-    0.0007
Ecliptic Y           12.08320197 +/-    0.0002
Ecliptic Z           -2.11104701 +/-    0.0000
Ecliptic XDOT        -0.00058672 +/-    0.0000
Ecliptic YDOT         0.00241457 +/-    0.0000
Ecliptic ZDOT         0.00004627 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.69328189 +/-    0.0007
Geocenter to KBO     45.27676892 +/-    0.0007
# Hcoef:  6.96

The following table shows the complete astrometric record for 13UX18. 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 (13UX18) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.52410  01 04 59.374  +04 01 28.06  23.5r 13UX18    568  C~2Yih      
2013 08  02.56680  01 04 59.319  +04 01 27.58  23.4r 13UX18    568  C~2Yih      
2013 08  30.43961  01 03 59.382  +03 53 57.52        13UX18    568  C~2Yih      
2013 08  31.44379  01 03 56.317  +03 53 36.43  23.5r 13UX18    568  C~2Yih      
2013 08  31.48677  01 03 56.184  +03 53 35.42  23.5r 13UX18    568  C~2Yih      
2013 08  31.49523  01 03 56.132  +03 53 35.53  23.6r 13UX18    568  C~2Yih      
2013 08  31.50005  01 03 56.134  +03 53 35.17  23.6r 13UX18    568  C~2Yih      
2013 08  31.50475  01 03 56.126  +03 53 35.10  23.7r 13UX18    568  C~2Yih      
2013 09  04.42370  01 03 43.628  +03 52 09.56  23.4r 13UX18    568  C~2Yih      
2013 09  04.46654  01 03 43.481  +03 52 08.45  23.4r 13UX18    568  C~2Yih      
2013 10  06.40501  01 01 40.243  +03 38 52.85  23.5r 13UX18    568  C~2Yih      
2013 10  06.48768  01 01 39.883  +03 38 50.77  23.8r 13UX18    568  C~2Yih      
2013 10  09.52833  01 01 27.109  +03 37 31.92  24.1r 13UX18    568  C~2Yih      
2013 10  09.53489  01 01 27.079  +03 37 31.94  23.4r 13UX18    568  C~2Yih      
2013 10  31.24669  00 59 58.392  +03 28 43.38  23.5r 13UX18    568  C~2Yih      
2013 10  31.28968  00 59 58.213  +03 28 42.41  23.5r 13UX18    568  C~2Yih      
2013 10  31.33240  00 59 58.053  +03 28 41.32  23.2r 13UX18    568  C~2Yih      
2013 11  01.27294  00 59 54.443  +03 28 20.78  23.4r 13UX18    568  C~2Yih      
2013 11  01.39814  00 59 53.938  +03 28 17.76  22.7r 13UX18    568  C~2Yih      
2013 11  05.45105  00 59 38.787  +03 26 51.77  23.6r 13UX18    568  C~2Yih      
2013 11  29.31322  00 58 25.711  +03 20 23.54  24.0r 13UX18    568  C~2Yih      
2013 12  04.26342  00 58 14.926  +03 19 33.88  24.0r 13UX18    568  C~2Yih      
2013 12  04.31568  00 58 14.822  +03 19 33.40  24.2r 13UX18    568  C~2Yih      
2014 06  27.59391  01 08 59.944  +04 29 53.05  23.8r 13UX18    568  C~2Yih      
2014 06  28.59898  01 09 01.658  +04 30 00.27  23.9r 13UX18    568  C~2Yih      
2014 07  24.54528  01 09 18.702  +04 30 14.44  23.9r 13UX18    568  C~2Yih      
2014 07  27.57602  01 09 17.225  +04 29 54.83  23.8r 13UX18    568  C~2Yih      
2014 08  22.55261  01 08 36.220  +04 24 22.92  23.3r 13UX18    568  C~2Yih      
2014 08  28.41447  01 08 20.613  +04 22 32.30  23.5r 13UX18    568  C~2Yih      
2014 10  23.36792  01 04 46.155  +03 59 51.85  23.5r 13UX18    568  C~2Yih      
2014 10  25.28038  01 04 38.355  +03 59 06.00  23.7r 13UX18    568  C~2Yih      
2014 10  25.29035  01 04 38.303  +03 59 05.69  25.4u 13UX18    568  C~2Yih      
2014 10  25.33867  01 04 38.121  +03 59 04.55  23.6r 13UX18    568  C~2Yih      
2014 10  27.31342  01 04 30.150  +03 58 18.07  23.5r 13UX18    568  C~2Yih      
2014 10  27.32760  01 04 30.085  +03 58 17.75  24.9u 13UX18    568  C~2Yih      
2014 10  27.35430  01 04 29.987  +03 58 17.02  25.3u 13UX18    568  C~2Yih      
2014 10  27.36433  01 04 29.947  +03 58 16.92  23.4r 13UX18    568  C~2Yih      
2014 10  27.40661  01 04 29.771  +03 58 15.94  23.5r 13UX18    568  C~2Yih      
2014 11  24.23611  01 02 52.998  +03 49 21.87  23.3r 13UX18    568  C~2Yih      
2014 11  25.23226  01 02 50.273  +03 49 07.99  23.4r 13UX18    568  C~2Yih      
2015 01  18.22018  01 02 14.443  +03 48 56.01  23.7r 13UX18    568  C~2Yih      
2019 10  26.147490 01 25 52.144  +06 16 48.22  23.5G 13UX18    G37  C~3clS      
2019 10  26.215760 01 25 51.862  +06 16 46.65        13UX18    G37  C~3clS      

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     0.07       0.00     0.00
     2   0.0001      0.00     0.04       0.00    -0.03
     3   0.0764      0.00     0.02       0.00    -0.09
     4   0.0792      0.00     0.07       0.00     0.04
     5   0.0793      0.00     0.11       0.00    -0.05
     6   0.0793      0.00    -0.27       0.00     0.24
     7   0.0793      0.00    -0.01       0.00    -0.02
     8   0.0793      0.00     0.09       0.00     0.01
     9   0.0901      0.00    -0.01       0.00     0.03
    10   0.0902      0.00    -0.05       0.00    -0.12
    11   0.1776      0.00     0.03       0.00     0.02
    12   0.1779      0.00    -0.07       0.00     0.08
    13   0.1862      0.00    -0.05       0.00    -0.06
    14   0.1862      0.00    -0.08       0.00     0.13
    15   0.2456      0.00     0.16       0.00     0.04
    16   0.2458      0.00    -0.00       0.00     0.02
    17   0.2459      0.00     0.11       0.00    -0.13
    18   0.2485      0.00     0.01       0.00     0.05
    19   0.2488      0.00    -0.25       0.00    -0.23
    20   0.2599      0.00     0.03       0.00     0.00
    21   0.3252      0.00     0.04       0.00    -0.15
    22   0.3388      0.00     0.01       0.00     0.02
    23   0.3389      0.00     0.08       0.00     0.00
    24   0.9009      0.00     0.07       0.00     0.02
    25   0.9037      0.00    -0.06       0.00     0.07
    26   0.9747      0.00    -0.03       0.00     0.06
    27   0.9830      0.00     0.17       0.00    -0.03
    28   1.0542      0.00    -0.11       0.00    -0.18
    29   1.0702      0.00     0.01       0.00    -0.05
    30   1.2234      0.00     0.04       0.00     0.11
    31   1.2286      0.00    -0.04       0.00     0.07
    32   1.2287      0.00    -0.20       0.00    -0.01
    33   1.2288      0.00     0.06       0.00    -0.00
    34   1.2342      0.00    -0.01       0.00     0.02
    35   1.2342      0.00    -0.12       0.00     0.03
    36   1.2343      0.00     0.05       0.00    -0.08
    37   1.2343      0.00     0.06       0.00     0.05
    38   1.2344      0.00     0.01       0.00     0.06
    39   1.3106      0.00    -0.04       0.00     0.11
    40   1.3134      0.00     0.09       0.00     0.05
    41   1.4612      0.00     0.02       0.00    -0.02
    42   6.2303      0.00    -0.04       0.00    -0.04
    43   6.2305      0.00     0.07       0.00     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.

13UX18    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.899    43.899    43.899
ecceobj         0.051     0.051     0.051
incobj          2.885     2.885     2.885
qmin           40.588    40.582    40.579
qmax           46.907    46.949    46.956
amean          43.662    43.663    43.662
amin           43.321    43.319    43.315
amax           44.016    44.029    44.020
emean           0.047     0.047     0.047
emin            0.029     0.029     0.028
emax            0.067     0.067     0.067
imean           1.107     1.107     1.107
imin            0.197     0.196     0.196
imax            1.715     1.715     1.714
excite_mean     0.052     0.052     0.052
fracstop        1.000     1.000     1.000
cjmean          3.094     3.094     3.094

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       187.7     187.6     187.5
kozaiamp        180.0     180.0     180.0