Orbit Fit and Astrometric record for 16SP56

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: 16SP56    
# Created Fri Dec  3 02:13:54 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     53 observations of     54
# Arc:   7.19y
# First observation: 2013/10/29
#  Last observation: 2021/01/06
# Chi-squared of fit:    13.55 DOF:    100 RMS:  0.09
# Min/Max residuals:    -0.23    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.499099E-05  2.255148E-02  3.107923E-06  5.944239E-03  2.361004E-02 -5.438588E-03
# Covariance matrix:
  1.9580E-13 -9.8431E-14  2.8135E-14 -2.0774E-14 -4.7745E-14 -4.5488E-13
 -9.8431E-14  7.0299E-14 -2.3764E-14  1.8218E-14  1.3935E-14  3.9676E-13
  2.8135E-14 -2.3764E-14  1.0498E-13 -3.0242E-14 -3.8681E-15 -1.5184E-13
 -2.0774E-14  1.8218E-14 -3.0242E-14  1.3226E-14  3.6769E-16  1.1826E-13
 -4.7745E-14  1.3935E-14 -3.8681E-15  3.6769E-16  1.0428E-13  1.6063E-14
 -4.5488E-13  3.9676E-13 -1.5184E-13  1.1826E-13  1.6063E-14  2.5698E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
  -13.934450   33.610219   -0.033956   -0.238728   -0.962699  2456594.668698
# Heliocentric elements and errors
Epoch:              2456594.5000  =  2013/10/29
Mean Anomaly:          313.17231 +/-     0.006
Argument of Peri:       30.22158 +/-     0.012
Long of Asc Node:       75.34799 +/-     0.000
Inclination:            20.01489 +/-     0.000
Eccentricity:         0.26038928 +/-    0.0001
Semi-Major Axis:     49.86855470 +/-    0.0032
Time of Perihelion: 2473326.1519 +/-      11.2
Perihelion:          36.88331760 +/-    0.0041
Aphelion:            62.85379180 +/-    0.0052
Period (y)              352.1668 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.04236401 +/-    0.0005
Ecliptic Y           23.33543414 +/-    0.0003
Ecliptic Z          -10.19946097 +/-    0.0001
Ecliptic XDOT        -0.00182527 +/-    0.0000
Ecliptic YDOT         0.00192937 +/-    0.0000
Ecliptic ZDOT         0.00082103 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.31918843 +/-    0.0004
Geocenter to KBO     42.35506246 +/-    0.0006
# Hcoef:  6.34

The following table shows the complete astrometric record for 16SP56. 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 (16SP56) followed by the observatory code and reference code for the source of the astrometry.

2013 10  29.16792  02 24 15.936  -00 24 52.22  23.1g 16SP56    W84  C~4ybt      
2013 11  13.14207  02 23 07.605  -00 29 00.72  22.0z 16SP56    W84  C~4ybt      
2013 12  21.12090  02 20 47.570  -00 31 05.30  22.5z 16SP56    W84  C~4ybt      
2014 08  19.38758  02 32 26.906  +00 47 51.98  22.7r 16SP56    W84  C~4ybt      
2014 08  19.38758  02 32 26.91   +00 47 52.0   22.7r 16SP56    W84  C~3cyl      
2014 09  24.29614  02 31 09.632  +00 34 03.86  23.5g 16SP56    W84  C~4ybt      
2014 09  24.29614  02 31 09.63   +00 34 03.9   23.6g 16SP56    W84  C~3cyl      
2014 10  01.34252  02 30 44.130  +00 31 05.58  22.6r 16SP56    W84  C~4ybt      
2014 10  01.34252  02 30 44.13   +00 31 05.6   22.6r 16SP56    W84  C~3cyl      
2014 10  21.31020  02 29 20.116  +00 23 07.33  22.7r 16SP56    W84  C~4ybt      
2014 10  21.31020  02 29 20.12   +00 23 07.3   22.7r 16SP56    W84  C~3cyl      
2014 10  21.31157  02 29 20.107  +00 23 07.13  23.3g 16SP56    W84  C~4ybt      
2014 10  21.31157  02 29 20.10   +00 23 07.2   23.5g 16SP56    W84  C~3cyl      
2014 11  03.27510  02 28 20.509  +00 18 46.54  22.3z 16SP56    W84  C~4ybt      
2014 11  03.27510  02 28 20.51   +00 18 46.6   22.5z 16SP56    W84  C~3cyl      
2015 01  16.06930  02 24 29.281  +00 19 39.69  22.4z 16SP56    W84  C~4ybt      
2016 09  09.40706  02 40 51.813  +02 11 06.71  22.4i 16SP56    W84  C~4ybt      
2016 09  09.40706  02 40 51.81   +02 11 06.8   22.7i 16SP56    W84  C~3cyl      
2016 09  10.36578  02 40 49.553  +02 10 45.14  22.6r 16SP56    W84  C~4ybt      
2016 09  10.36578  02 40 49.55   +02 10 45.1   22.8r 16SP56    W84  C~3cyl      
2016 09  10.36714  02 40 49.549  +02 10 45.03  23.4g 16SP56    W84  C~4ybt      
2016 09  10.36714  02 40 49.55   +02 10 45.0   23.3g 16SP56    W84  C~3cyl      
2016 09  27.45437  02 39 58.40   +02 03 58.4   23.2g 16SP56    568  C~2eAI      
2016 09  27.57390  02 39 57.96   +02 03 55.5   23.2g 16SP56    568  C~2eAI      
2016 09  27.62330  02 39 57.78   +02 03 54.3   23.1g 16SP56    568  C~2eAI      
2016 09  28.46344  02 39 54.79   +02 03 33.8   23.2g 16SP56    568  C~2eAI      
2016 09  28.52411  02 39 54.56   +02 03 32.3   23.1g 16SP56    568  C~2eAI      
2016 09  28.58334  02 39 54.34   +02 03 30.9   23.2g 16SP56    568  C~2eAI      
2016 09  29.47526  02 39 51.11   +02 03 09.2   23.3g 16SP56    568  C~2eAI      
2016 09  29.53567  02 39 50.88   +02 03 07.7   23.1g 16SP56    568  C~2eAI      
2016 09  29.59545  02 39 50.66   +02 03 06.3   23.2g 16SP56    568  C~2eAI      
2016 11  04.18757  02 37 15.749  +01 50 02.05  22.8r 16SP56    W84  C~4ybt      
2016 11  04.18757  02 37 15.75   +01 50 02.1   22.9r 16SP56    W84  C~3cyl      
2016 11  04.18896  02 37 15.744  +01 50 02.07  22.3i 16SP56    W84  C~4ybt      
2016 11  04.18896  02 37 15.74   +01 50 02.1   22.4i 16SP56    W84  C~3cyl      
2016 11  10.165532 02 36 47.53   +01 48 20.9   21.2z 16SP56    W84  C~352t      
2016 11  25.13346  02 35 40.134  +01 45 19.47  23.3g 16SP56    W84  C~4ybt      
2017 09  18.32668  02 45 03.532  +02 54 00.27  22.0i 16SP56    W84  C~4ybt      
2017 09  18.32804  02 45 03.532  +02 54 00.34  22.5r 16SP56    W84  C~4ybt      
2017 09  18.32942  02 45 03.526  +02 54 00.17  22.9g 16SP56    W84  C~4ybt      
2017 10  30.22972  02 42 15.601  +02 38 09.97  21.9z 16SP56    W84  C~4ybt      
2017 11  01.17828  02 42 06.427  +02 37 32.73  22.4z 16SP56    W84  C~4ybt      
2017 11  23.14743  02 40 24.125  +02 32 06.32  22.3i 16SP56    W84  C~4ybt      
2017 11  23.14883  02 40 24.122  +02 32 06.26  23.2g 16SP56    W84  C~4ybt      
2017 11  23.15019  02 40 24.110  +02 32 06.20  22.5r 16SP56    W84  C~4ybt      
2017 11  29.15057  02 39 58.031  +02 31 13.19  22.7z 16SP56    W84  C~4ybt      
2017 12  07.04087  02 39 26.060  +02 30 30.89  22.2i 16SP56    W84  C~4ybt      
2017 12  10.10460  02 39 14.483  +02 30 23.11  22.8g 16SP56    W84  C~4ybt      
2018 11  16.14680  02 45 35.217  +03 20 29.09  22.3i 16SP56    W84  C~4ybt      
2020 10  20.418910 02 57 07.360  +05 03 33.65  22.4G 16SP56    G37  C~4L11      
2020 10  20.489380 02 57 07.039  +05 03 32.12        16SP56    G37  C~4L11      
2021 01  06.34000  02 51 50.777  +04 53 39.23  22.6w 16SP56    F51  C~4UMZ      
2021 01  06.36590  02 51 50.749  +04 53 39.60  22.4w 16SP56    F51  C~4UMZ      
2021 01  06.37903  02 51 50.702  +04 53 40.13  22.4w 16SP56    F51  C~4UMZ      

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    -0.04       0.00     0.18
     2   0.0410      0.00    -0.00       0.00     0.15
     3   0.1450      0.00    -0.01       0.00     0.05
     4   0.8055      0.00     0.11       0.00    -0.04
     5   0.8055      0.00     0.05       0.00    -0.06
     6   0.9038      0.00    -0.01       0.00    -0.05
     7   0.9038      0.00     0.02       0.00    -0.09
     8   0.9231      0.00     0.01       0.00     0.08
     9   0.9231      0.00     0.01       0.00     0.06
    10   0.9778      0.00     0.16       0.00    -0.05
    11   0.9778      0.00     0.10       0.00    -0.02
    12   0.9778      0.00    -0.04       0.00    -0.12
    13   0.9778      0.00     0.06       0.00    -0.19
    14   1.0133      0.00    -0.11       0.00    -0.07
    15   1.0133      0.00    -0.12       0.00    -0.13
    16   1.2153      0.00    -0.07       0.00     0.14
    17   2.8644      0.00     0.09       0.00    -0.05
    18   2.8644      0.00     0.14       0.00    -0.14
    19   2.8671      0.00     0.03       0.00     0.03
    20   2.8671      0.00     0.07       0.00     0.07
    21   2.8671      0.00     0.08       0.00    -0.04
    22   2.8671      0.00     0.06       0.00    -0.01
    23   2.9139      0.00    -0.08       0.00     0.05
    24   2.9142      0.00    -0.17       0.00     0.06
    25   2.9143      0.00    -0.18       0.00     0.06
    26   2.9166      0.00    -0.07       0.00     0.01
    27   2.9168      0.00    -0.16       0.00    -0.01
    28   2.9169      0.00    -0.18       0.00     0.03
    29   2.9194      0.00    -0.07       0.00     0.05
    30   2.9196      0.00    -0.13       0.00     0.02
    31   2.9197      0.00    -0.07       0.00     0.07
    32   3.0172      0.00     0.07       0.00     0.02
    33   3.0172      0.00     0.06       0.00    -0.03
    34   3.0172      0.00     0.02       0.00     0.04
    35   3.0172      0.00     0.08       0.00     0.01
    36   3.0335      0.00 (  -2.95)      0.00 (  -1.83)
    37   3.0745      0.00     0.05       0.00     0.01
    38   3.8882      0.00     0.05       0.00     0.02
    39   3.8882      0.00     0.11       0.00     0.12
    40   3.8882      0.00     0.09       0.00    -0.02
    41   4.0029      0.00     0.08       0.00    -0.07
    42   4.0082      0.00     0.08       0.00    -0.04
    43   4.0684      0.00     0.02       0.00     0.05
    44   4.0684      0.00     0.07       0.00     0.01
    45   4.0684      0.00    -0.02       0.00    -0.04
    46   4.0848      0.00     0.06       0.00    -0.01
    47   4.1064      0.00     0.03       0.00     0.05
    48   4.1148      0.00    -0.04       0.00    -0.03
    49   5.0485      0.00    -0.02       0.00     0.03
    50   6.9767      0.00    -0.04       0.00     0.07
    51   6.9769      0.00    -0.01       0.00     0.01
    52   7.1901      0.00    -0.15       0.00    -0.23
    53   7.1901      0.00     0.23       0.00    -0.14
    54   7.1902      0.00    -0.07       0.00     0.25

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.

16SP56    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        50.121    50.121    50.122
ecceobj         0.259     0.259     0.259
incobj         20.014    20.014    20.014
qmin           35.717    35.649    35.674
qmax           64.294    64.650    64.460
amean          49.730    49.751    49.761
amin           49.253    49.236    49.277
amax           50.342    50.372    50.359
emean           0.262     0.263     0.262
emin            0.245     0.245     0.244
emax            0.280     0.283     0.282
imean          18.488    18.460    18.513
imin           17.792    17.703    17.725
imax           19.089    19.059    19.120
excite_mean     0.411     0.412     0.412
fracstop        1.000     1.000     1.000
cjmean          2.959     2.959     2.959

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       177.6     176.8     182.3
kozaiamp        180.0     179.9     179.9