Orbit Fit and Astrometric record for 16SY56

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: 16SY56    
# Created Fri Oct  7 01:17:52 2022
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     61 observations of     61
# Arc:   5.16y
# First observation: 2013/10/03
#  Last observation: 2018/12/01
# Chi-squared of fit:    27.73 DOF:    116 RMS:  0.12
# Min/Max residuals:    -0.35    0.38
# Exact a, adot, b, bdot, g, gdot:
  1.809347E-05  2.687222E-02  9.358708E-07  1.801166E-03  2.596564E-02 -2.007803E-03
# Covariance matrix:
  1.6938E-13 -1.1456E-13  4.2167E-15 -6.0237E-15 -5.5822E-15 -7.2428E-13
 -1.1456E-13  1.3668E-13 -7.6054E-15  9.3743E-15  5.2287E-14  1.1046E-12
  4.2167E-15 -7.6054E-15  1.1194E-13 -3.6441E-14 -5.9526E-15 -6.7738E-14
 -6.0237E-15  9.3743E-15 -3.6441E-14  1.5397E-14  4.1108E-15  8.4834E-14
 -5.5822E-15  5.2287E-14 -5.9526E-15  4.1108E-15  1.3233E-13  4.2771E-13
 -7.2428E-13  1.1046E-12 -6.7738E-14  8.4834E-14  4.2771E-13  1.0020E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -13.842898   30.492475    0.351809   -0.224014   -0.909564  2456568.796258
# Heliocentric elements and errors
Epoch:              2456568.5000  =  2013/10/03
Mean Anomaly:          319.04570 +/-     0.033
Argument of Peri:      335.92771 +/-     0.046
Long of Asc Node:      104.45922 +/-     0.001
Inclination:            14.00749 +/-     0.000
Eccentricity:         0.11784436 +/-    0.0001
Semi-Major Axis:     42.95443607 +/-    0.0026
Time of Perihelion: 2468266.3880 +/-      12.5
Perihelion:          37.89249826 +/-    0.0046
Aphelion:            48.01637389 +/-    0.0049
Period (y)              281.5271 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.20705742 +/-    0.0005
Ecliptic Y           19.14980906 +/-    0.0003
Ecliptic Z           -9.21450444 +/-    0.0001
Ecliptic XDOT        -0.00158190 +/-    0.0000
Ecliptic YDOT         0.00235896 +/-    0.0000
Ecliptic ZDOT         0.00023519 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.42505756 +/-    0.0004
Geocenter to KBO     38.51251933 +/-    0.0005
# Hcoef:  7.35

The following table shows the complete astrometric record for 16SY56. 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 (16SY56) followed by the observatory code and reference code for the source of the astrometry.

2013 10  03.29548  02 12 44.604  -01 20 55.50  22.7g 16SY56    W84  C~4ybt      
2013 10  03.29548  02 12 44.59   -01 20 55.4   22.7g 16SY56    W84  C~3cyl      
2013 10  04.20610  02 12 40.648  -01 21 23.03  23.7g 16SY56    W84  C~4ybt      
2013 11  08.25167  02 09 53.343  -01 36 18.00  23.4r 16SY56    W84  C~4ybt      
2013 11  08.25167  02 09 53.34   -01 36 18.0   23.7r 16SY56    W84  C~3cyl      
2013 11  13.17529  02 09 30.048  -01 37 42.89  22.7z 16SY56    W84  C~4ybt      
2014 08  19.38618  02 20 30.520  -00 21 28.26  23.0i 16SY56    W84  C~4ybt      
2014 08  19.38618  02 20 30.52   -00 21 28.3   23.2i 16SY56    W84  C~3cyl      
2014 10  01.35954  02 18 33.375  -00 42 16.22  23.0i 16SY56    W84  C~4ybt      
2014 10  01.35954  02 18 33.38   -00 42 16.2   23.2i 16SY56    W84  C~3cyl      
2014 10  01.36230  02 18 33.348  -00 42 16.35  23.3r 16SY56    W84  C~4ybt      
2014 10  01.36230  02 18 33.35   -00 42 16.4   23.4r 16SY56    W84  C~3cyl      
2014 10  23.29752  02 16 52.284  -00 52 42.28  24.0g 16SY56    W84  C~4ybt      
2014 10  23.29889  02 16 52.272  -00 52 42.35  23.3r 16SY56    W84  C~4ybt      
2014 10  23.29889  02 16 52.27   -00 52 42.4   23.4r 16SY56    W84  C~3cyl      
2014 10  23.30162  02 16 52.266  -00 52 42.30  23.3i 16SY56    W84  C~4ybt      
2014 12  16.13208  02 12 59.016  -01 03 52.78  24.1g 16SY56    W84  C~4ybt      
2014 12  16.13481  02 12 59.018  -01 03 52.95  23.2i 16SY56    W84  C~4ybt      
2015 01  20.04740  02 12 10.384  -00 55 14.74  23.4i 16SY56    W84  C~4ybt      
2015 12  15.15812  02 18 39.900  -00 26 36.74  23.4i 16SY56    W84  C~4ybt      
2016 01  03.10590  02 17 54.777  -00 23 59.93  24.3g 16SY56    W84  C~4ybt      
2016 09  10.30904  02 31 05.321  +00 43 20.61  22.9r 16SY56    W84  C~4ybt      
2016 09  10.30904  02 31 05.32   +00 43 20.6   23.2r 16SY56    W84  C~3cyl      
2016 09  10.31040  02 31 05.314  +00 43 20.53  23.0i 16SY56    W84  C~4ybt      
2016 09  10.31040  02 31 05.31   +00 43 20.6   23.2i 16SY56    W84  C~3cyl      
2016 09  10.31179  02 31 05.314  +00 43 20.54  23.7g 16SY56    W84  C~4ybt      
2016 09  10.31179  02 31 05.31   +00 43 20.5   23.8g 16SY56    W84  C~3cyl      
2016 09  27.46491  02 30 08.60   +00 34 53.6   23.8g 16SY56    568  C~2eAI      
2016 09  27.52550  02 30 08.36   +00 34 51.8   23.9g 16SY56    568  C~2eAI      
2016 09  27.58468  02 30 08.12   +00 34 50.0   23.8g 16SY56    568  C~2eAI      
2016 09  28.47413  02 30 04.65   +00 34 23.4   23.9g 16SY56    568  C~2eAI      
2016 09  28.53463  02 30 04.41   +00 34 21.6   23.9g 16SY56    568  C~2eAI      
2016 09  28.59436  02 30 04.16   +00 34 19.8   23.9g 16SY56    568  C~2eAI      
2016 09  29.48603  02 30 00.63   +00 33 53.2   23.9g 16SY56    568  C~2eAI      
2016 11  04.16975  02 27 13.866  +00 18 02.15  23.6g 16SY56    W84  C~4ybt      
2016 11  04.17111  02 27 13.870  +00 18 02.22  22.8r 16SY56    W84  C~4ybt      
2016 11  04.17111  02 27 13.87   +00 18 02.2   23.2r 16SY56    W84  C~3cyl      
2016 11  04.17248  02 27 13.872  +00 18 02.28  22.8i 16SY56    W84  C~4ybt      
2016 11  04.17248  02 27 13.87   +00 18 02.3   23.1i 16SY56    W84  C~3cyl      
2016 11  04.19034  02 27 13.782  +00 18 01.74  23.7g 16SY56    W84  C~4ybt      
2016 11  04.19034  02 27 13.78   +00 18 01.7   23.7g 16SY56    W84  C~3cyl      
2016 11  04.19173  02 27 13.776  +00 18 01.70  23.2r 16SY56    W84  C~4ybt      
2016 11  04.19173  02 27 13.78   +00 18 01.7   23.3r 16SY56    W84  C~3cyl      
2016 11  04.19312  02 27 13.768  +00 18 01.64  22.9i 16SY56    W84  C~4ybt      
2016 11  04.19312  02 27 13.77   +00 18 01.6   23.0i 16SY56    W84  C~3cyl      
2016 11  04.19451  02 27 13.759  +00 18 01.87  23.5g 16SY56    W84  C~4ybt      
2016 11  04.19588  02 27 13.742  +00 18 01.74  22.7r 16SY56    W84  C~4ybt      
2016 11  04.19588  02 27 13.74   +00 18 01.7   22.9r 16SY56    W84  C~3cyl      
2016 11  04.19726  02 27 13.754  +00 18 01.62  22.8i 16SY56    W84  C~4ybt      
2016 11  04.19726  02 27 13.75   +00 18 01.6   22.7i 16SY56    W84  C~3cyl      
2016 11  04.20274  02 27 13.699  +00 18 01.47  24.5g 16SY56    W84  C~4ybt      
2016 11  04.20412  02 27 13.708  +00 18 01.52  23.3r 16SY56    W84  C~4ybt      
2016 11  04.20412  02 27 13.71   +00 18 01.6   23.4r 16SY56    W84  C~3cyl      
2016 11  04.20551  02 27 13.71   +00 18 01.5   23.4i 16SY56    W84  C~3cyl      
2016 11  10.15935  02 26 44.290  +00 16 03.42  22.4z 16SY56    W84  C~4ybt      
2016 11  10.17497  02 26 44.206  +00 16 03.05  23.0z 16SY56    W84  C~4ybt      
2017 09  18.32393  02 36 23.819  +01 17 22.09  23.1i 16SY56    W84  C~4ybt      
2017 09  18.32531  02 36 23.830  +01 17 22.15  23.9g 16SY56    W84  C~4ybt      
2018 11  16.12781  02 37 44.681  +01 30 33.15  22.2i 16SY56    W84  C~4ybt      
2018 12  01.16973  02 36 34.543  +01 27 26.01  23.1r 16SY56    W84  C~4ybt      
2018 12  01.17110  02 36 34.547  +01 27 25.77  23.8g 16SY56    W84  C~4ybt      

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    -0.35       0.00    -0.09
     2   0.0000      0.00    -0.14       0.00    -0.19
     3   0.0025      0.00     0.02       0.00     0.01
     4   0.0984      0.00    -0.02       0.00    -0.05
     5   0.0984      0.00    -0.07       0.00    -0.05
     6   0.1119      0.00     0.11       0.00     0.04
     7   0.8764      0.00     0.10       0.00     0.13
     8   0.8764      0.00     0.10       0.00     0.09
     9   0.9940      0.00     0.30       0.00     0.03
    10   0.9940      0.00     0.22       0.00     0.01
    11   0.9940      0.00     0.02       0.00    -0.09
    12   0.9940      0.00    -0.01       0.00    -0.04
    13   1.0541      0.00     0.11       0.00     0.08
    14   1.0541      0.00     0.03       0.00     0.05
    15   1.0541      0.00     0.00       0.00    -0.00
    16   1.0541      0.00     0.15       0.00     0.17
    17   1.2015      0.00    -0.06       0.00     0.14
    18   1.2015      0.00     0.09       0.00    -0.04
    19   1.2971      0.00    -0.02       0.00    -0.23
    20   2.1981      0.00     0.07       0.00    -0.07
    21   2.2500      0.00    -0.04       0.00     0.04
    22   2.9378      0.00    -0.02       0.00    -0.05
    23   2.9378      0.00    -0.01       0.00    -0.04
    24   2.9378      0.00    -0.12       0.00    -0.01
    25   2.9378      0.00    -0.06       0.00    -0.08
    26   2.9378      0.00    -0.06       0.00    -0.07
    27   2.9378      0.00     0.00       0.00    -0.03
    28   2.9847      0.00    -0.14       0.00     0.16
    29   2.9849      0.00    -0.13       0.00     0.17
    30   2.9850      0.00    -0.19       0.00     0.14
    31   2.9875      0.00    -0.12       0.00     0.14
    32   2.9876      0.00    -0.05       0.00     0.14
    33   2.9878      0.00    -0.19       0.00     0.13
    34   2.9903      0.00    -0.08       0.00     0.16
    35   3.0880      0.00    -0.23       0.00    -0.11
    36   3.0880      0.00    -0.07       0.00    -0.03
    37   3.0880      0.00    -0.07       0.00    -0.01
    38   3.0880      0.00     0.04       0.00     0.10
    39   3.0880      0.00     0.07       0.00     0.08
    40   3.0880      0.00     0.04       0.00    -0.12
    41   3.0880      0.00     0.07       0.00    -0.08
    42   3.0880      0.00     0.15       0.00    -0.09
    43   3.0880      0.00     0.09       0.00    -0.09
    44   3.0880      0.00     0.10       0.00    -0.16
    45   3.0880      0.00     0.07       0.00    -0.12
    46   3.0880      0.00     0.04       0.00     0.14
    47   3.0880      0.00    -0.14       0.00    -0.00
    48   3.0880      0.00    -0.11       0.00     0.04
    49   3.0880      0.00     0.11       0.00    -0.07
    50   3.0880      0.00     0.17       0.00    -0.05
    51   3.0880      0.00    -0.23       0.00    -0.09
    52   3.0880      0.00     0.03       0.00     0.07
    53   3.0880      0.00     0.00       0.00    -0.01
    54   3.0880      0.00     0.14       0.00     0.00
    55   3.1044      0.00     0.09       0.00     0.04
    56   3.1044      0.00    -0.00       0.00    -0.05
    57   3.9590      0.00     0.00       0.00     0.17
    58   3.9590      0.00     0.23       0.00     0.27
    59   5.1193      0.00     0.38       0.00    -0.13
    60   5.1605      0.00    -0.14       0.00    -0.01
    61   5.1605      0.00     0.01       0.00    -0.24

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.

16SY56    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.180    43.180    43.181
ecceobj         0.119     0.119     0.119
incobj         14.014    14.014    14.014
qmin           36.650    36.616    36.672
qmax           49.345    49.389    49.323
amean          42.848    42.849    42.849
amin           42.488    42.491    42.489
amax           43.244    43.242    43.241
emean           0.124     0.124     0.124
emin            0.106     0.106     0.106
emax            0.142     0.142     0.142
imean          12.333    12.333    12.333
imin           11.368    11.371    11.365
imax           13.209    13.210    13.208
excite_mean     0.247     0.247     0.247
fracstop        1.000     1.000     1.000
cjmean          3.015     3.015     3.015

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       177.4     177.4     177.3
kozaiamp        180.0     180.0     180.0