Orbit Fit and Astrometric record for 16SU57

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: 16SU57    
# Created Sat Dec  4 02:13:56 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     59 observations of     59
# Arc:   5.06y
# First observation: 2013/11/08
#  Last observation: 2018/12/01
# Chi-squared of fit:    20.43 DOF:    112 RMS:  0.10
# Min/Max residuals:    -0.26    0.42
# Exact a, adot, b, bdot, g, gdot:
  1.523660E-05  2.385869E-02 -5.980526E-06 -9.185330E-03  2.504399E-02  3.962828E-03
# Covariance matrix:
  1.5456E-13 -9.5888E-14 -1.5233E-14  2.2378E-14 -1.3354E-14 -5.6731E-13
 -9.5888E-14  1.0910E-13  2.4354E-14 -3.5893E-14  2.4244E-14  9.1022E-13
 -1.5233E-14  2.4354E-14  1.2417E-13 -4.6362E-14  4.2463E-15  2.3434E-13
  2.2378E-14 -3.5893E-14 -4.6362E-14  2.8709E-14 -1.1897E-14 -3.4862E-13
 -1.3354E-14  2.4244E-14  4.2463E-15 -1.1897E-14  1.4656E-13  3.1535E-13
 -5.6731E-13  9.1022E-13  2.3434E-13 -3.4862E-13  3.1535E-13  8.8485E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
  -10.654311   31.640631   -0.239676   -0.177363   -0.943561  2456604.727958
# Heliocentric elements and errors
Epoch:              2456604.5000  =  2013/11/08
Mean Anomaly:           46.69692 +/-     0.011
Argument of Peri:      142.16676 +/-     0.018
Long of Asc Node:      186.85049 +/-     0.000
Inclination:            23.37964 +/-     0.000
Eccentricity:         0.18685476 +/-    0.0001
Semi-Major Axis:     45.70997560 +/-    0.0041
Time of Perihelion: 2441962.4905 +/-       3.9
Perihelion:          37.16884916 +/-    0.0065
Aphelion:            54.25110205 +/-    0.0074
Period (y)              309.0471 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           34.09897926 +/-    0.0005
Ecliptic Y           21.29620794 +/-    0.0003
Ecliptic Z           -7.38262310 +/-    0.0001
Ecliptic XDOT        -0.00117003 +/-    0.0000
Ecliptic YDOT         0.00234481 +/-    0.0000
Ecliptic ZDOT        -0.00106680 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.87497704 +/-    0.0005
Geocenter to KBO     39.92968456 +/-    0.0006
# Hcoef:  7.13

The following table shows the complete astrometric record for 16SU57. 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 (16SU57) followed by the observatory code and reference code for the source of the astrometry.

2013 11  08.22718  02 12 36.943  +02 01 52.72  23.1r 16SU57    W84  C~4ybt      
2013 11  08.22718  02 12 36.94   +02 01 52.7   23.1r 16SU57    W84  C~3cyl      
2013 11  08.24587  02 12 36.866  +02 01 52.18  23.0i 16SU57    W84  C~4ybt      
2013 11  08.24587  02 12 36.87   +02 01 52.1   23.2i 16SU57    W84  C~3cyl      
2013 11  13.19608  02 12 14.490  +01 59 50.35  23.1z 16SU57    W84  C~4ybt      
2013 11  23.19826  02 11 31.595  +01 56 17.55  22.7i 16SU57    W84  C~4ybt      
2013 11  23.19826  02 11 31.60   +01 56 17.5   23.5i 16SU57    W84  C~3cyl      
2013 12  01.18567  02 11 00.419  +01 54 03.46  24.1g 16SU57    W84  C~4ybt      
2014 10  01.34844  02 21 17.780  +02 19 26.44  24.2g 16SU57    W84  C~4ybt      
2014 10  21.24508  02 19 51.988  +02 08 35.38  23.5g 16SU57    W84  C~4ybt      
2014 10  21.24508  02 19 51.98   +02 08 35.4   24.1g 16SU57    W84  C~3cyl      
2014 10  21.24648  02 19 52.00   +02 08 35.3   22.3r 16SU57    W84  C~3cyl      
2015 01  19.04437  02 15 13.710  +01 51 45.54  22.9i 16SU57    W84  C~4ybt      
2015 01  19.04437  02 15 13.71   +01 51 45.6   23.1i 16SU57    W84  C~3cyl      
2015 11  22.13993  02 23 14.449  +01 52 47.20  22.6z 16SU57    W84  C~4ybt      
2015 11  22.13993  02 23 14.45   +01 52 47.2   22.6z 16SU57    W84  C~3cyl      
2015 12  17.13495  02 21 43.155  +01 47 30.62  23.6r 16SU57    W84  C~4ybt      
2015 12  17.13495  02 21 43.15   +01 47 30.6   23.6r 16SU57    W84  C~3cyl      
2015 12  17.13631  02 21 43.142  +01 47 30.66  22.6i 16SU57    W84  C~4ybt      
2016 01  10.07046  02 20 57.700  +01 48 05.59  24.2g 16SU57    W84  C~4ybt      
2016 09  09.40569  02 33 53.538  +02 26 37.66  22.3i 16SU57    W84  C~4ybt      
2016 09  09.40569  02 33 53.54   +02 26 37.7   22.7i 16SU57    W84  C~3cyl      
2016 09  10.36303  02 33 51.237  +02 26 07.84  23.2r 16SU57    W84  C~4ybt      
2016 09  10.36303  02 33 51.24   +02 26 07.9   23.2r 16SU57    W84  C~3cyl      
2016 09  10.36441  02 33 51.242  +02 26 07.69  24.2g 16SU57    W84  C~4ybt      
2016 09  10.36441  02 33 51.24   +02 26 07.7   24.3g 16SU57    W84  C~3cyl      
2016 09  27.49056  02 32 59.11   +02 16 48.9   24.0g 16SU57    568  C~2eAJ      
2016 09  28.49988  02 32 55.45   +02 16 15.4   23.9g 16SU57    568  C~2eAJ      
2016 09  28.63277  02 32 54.95   +02 16 10.9   24.0g 16SU57    568  C~2eAJ      
2016 09  29.51179  02 32 51.72   +02 15 41.7   24.0g 16SU57    568  C~2eAJ      
2016 09  29.63235  02 32 51.26   +02 15 37.6   24.1g 16SU57    568  C~2eAJ      
2016 11  04.17935  02 30 16.137  +01 57 16.22  23.3r 16SU57    W84  C~4ybt      
2016 11  04.17935  02 30 16.14   +01 57 16.2   23.3r 16SU57    W84  C~3cyl      
2016 11  04.18072  02 30 16.142  +01 57 16.07  22.9i 16SU57    W84  C~4ybt      
2016 11  04.18072  02 30 16.14   +01 57 16.1   22.8i 16SU57    W84  C~3cyl      
2016 11  04.19864  02 30 16.033  +01 57 15.85  24.6g 16SU57    W84  C~4ybt      
2016 11  04.20001  02 30 16.034  +01 57 15.57  22.6r 16SU57    W84  C~4ybt      
2016 11  04.20001  02 30 16.03   +01 57 15.7   23.2r 16SU57    W84  C~3cyl      
2016 11  04.20137  02 30 16.034  +01 57 15.63  23.3i 16SU57    W84  C~4ybt      
2016 11  04.20137  02 30 16.03   +01 57 15.6   23.2i 16SU57    W84  C~3cyl      
2016 11  04.20274  02 30 16.025  +01 57 15.90  24.0g 16SU57    W84  C~4ybt      
2016 11  04.20412  02 30 16.016  +01 57 15.56  22.8r 16SU57    W84  C~4ybt      
2016 11  04.20412  02 30 16.02   +01 57 15.6   22.9r 16SU57    W84  C~3cyl      
2016 11  04.20551  02 30 16.004  +01 57 15.50  23.2i 16SU57    W84  C~4ybt      
2016 11  04.20551  02 30 16.00   +01 57 15.5   23.5i 16SU57    W84  C~3cyl      
2016 11  07.17788  02 30 02.179  +01 55 58.35  23.2i 16SU57    W84  C~4ybt      
2016 11  07.17788  02 30 02.18   +01 55 58.4   23.3i 16SU57    W84  C~3cyl      
2016 11  07.17925  02 30 02.176  +01 55 58.11  22.7z 16SU57    W84  C~4ybt      
2016 11  07.18063  02 30 02.173  +01 55 58.17  23.5r 16SU57    W84  C~4ybt      
2016 11  07.18063  02 30 02.17   +01 55 58.2   23.8r 16SU57    W84  C~3cyl      
2016 11  10.16158  02 29 48.39   +01 54 44.0   22.8z 16SU57    W84  C~3cyl      
2016 11  10.17497  02 29 48.319  +01 54 43.63  22.4z 16SU57    W84  C~4ybt      
2017 09  18.32393  02 39 08.757  +02 19 36.68  22.4i 16SU57    W84  C~4ybt      
2017 10  30.22835  02 36 21.366  +01 57 23.42  22.4z 16SU57    W84  C~4ybt      
2017 11  23.15019  02 34 32.037  +01 47 58.62  23.0r 16SU57    W84  C~4ybt      
2018 10  28.26554  02 42 09.743  +01 56 07.85  22.3z 16SU57    W84  C~4ybt      
2018 11  16.15094  02 40 42.230  +01 48 08.41  22.6i 16SU57    W84  C~4ybt      
2018 12  01.08313  02 39 37.358  +01 43 39.74  23.5r 16SU57    W84  C~4ybt      
2018 12  01.08452  02 39 37.356  +01 43 39.70  23.9g 16SU57    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    -0.05       0.00     0.02
     2   0.0000      0.00    -0.09       0.00     0.00
     3   0.0001      0.00     0.10       0.00    -0.04
     4   0.0001      0.00     0.16       0.00    -0.12
     5   0.0136      0.00    -0.17       0.00     0.03
     6   0.0410      0.00    -0.02       0.00    -0.03
     7   0.0410      0.00    -0.10       0.00     0.02
     8   0.0629      0.00    -0.13       0.00    -0.02
     9   0.8956      0.00    -0.03       0.00    -0.23
    10   0.9501      0.00     0.02       0.00     0.16
    11   0.9501      0.00     0.14       0.00     0.14
    12   0.9501      0.00     0.42       0.00     0.10
    13   1.1959      0.00     0.01       0.00     0.17
    14   1.1959      0.00     0.01       0.00     0.11
    15   2.0367      0.00     0.09       0.00    -0.12
    16   2.0367      0.00     0.11       0.00    -0.12
    17   2.1052      0.00    -0.11       0.00    -0.03
    18   2.1052      0.00    -0.03       0.00    -0.01
    19   2.1052      0.00    -0.17       0.00     0.04
    20   2.1707      0.00     0.08       0.00    -0.02
    21   2.8369      0.00     0.02       0.00    -0.22
    22   2.8369      0.00    -0.01       0.00    -0.26
    23   2.8395      0.00     0.01       0.00     0.08
    24   2.8395      0.00    -0.04       0.00     0.02
    25   2.8395      0.00     0.06       0.00    -0.08
    26   2.8395      0.00     0.09       0.00    -0.09
    27   2.8864      0.00    -0.00       0.00     0.01
    28   2.8892      0.00     0.00       0.00     0.09
    29   2.8895      0.00    -0.05       0.00     0.01
    30   2.8919      0.00    -0.03       0.00     0.06
    31   2.8923      0.00    -0.07       0.00    -0.02
    32   2.9896      0.00     0.05       0.00    -0.05
    33   2.9896      0.00     0.01       0.00    -0.03
    34   2.9896      0.00     0.15       0.00    -0.11
    35   2.9896      0.00     0.18       0.00    -0.14
    36   2.9897      0.00    -0.18       0.00     0.12
    37   2.9897      0.00    -0.13       0.00     0.00
    38   2.9897      0.00    -0.07       0.00    -0.13
    39   2.9897      0.00    -0.03       0.00    -0.06
    40   2.9897      0.00     0.03       0.00    -0.03
    41   2.9897      0.00    -0.01       0.00     0.27
    42   2.9897      0.00     0.02       0.00     0.01
    43   2.9897      0.00    -0.04       0.00    -0.03
    44   2.9897      0.00    -0.18       0.00    -0.05
    45   2.9897      0.00    -0.12       0.00    -0.05
    46   2.9978      0.00     0.00       0.00     0.22
    47   2.9978      0.00    -0.01       0.00     0.17
    48   2.9978      0.00     0.04       0.00    -0.03
    49   2.9978      0.00     0.05       0.00     0.09
    50   2.9978      0.00     0.09       0.00     0.06
    51   3.0060      0.00     0.12       0.00     0.05
    52   3.0060      0.00    -0.00       0.00     0.00
    53   3.8606      0.00    -0.01       0.00     0.02
    54   3.9754      0.00    -0.11       0.00     0.15
    55   4.0409      0.00     0.02       0.00     0.16
    56   4.9693      0.00     0.07       0.00     0.05
    57   5.0210      0.00     0.04       0.00    -0.13
    58   5.0619      0.00     0.03       0.00    -0.01
    59   5.0619      0.00     0.08       0.00    -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.

16SU57    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        46.000    46.000    46.000
ecceobj         0.192     0.192     0.192
incobj         23.312    23.312    23.312
qmin           36.248    36.201    36.191
qmax           55.561    55.560    55.525
amean          45.642    45.653    45.645
amin           45.254    45.249    45.246
amax           46.114    46.128    46.085
emean           0.188     0.188     0.188
emin            0.173     0.173     0.173
emax            0.205     0.205     0.205
imean          23.296    23.294    23.283
imin           22.789    22.805    22.776
imax           23.758    23.738    23.707
excite_mean     0.438     0.438     0.438
fracstop        1.000     1.000     1.000
cjmean          2.881     2.881     2.881

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       181.9     182.3     181.9
kozaiamp        180.0     180.0     180.0