Orbit Fit and Astrometric record for 16SB56

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: 16SB56    
# Created Sat Nov 27 02:14:01 2021
# Orbit generated from Bernstein formalism
# Fitting     17 observations of     17
# Arc:   3.31y
# First observation: 2014/08/19
#  Last observation: 2017/12/09
Preliminary a, adot, b, bdot, g, gdot:
   0.000028   0.022510  -0.000006  -0.003001   0.024077   0.000000
# Chi-squared of fit:     4.35 DOF:     28 RMS:  0.09
# Min/Max residuals:    -0.19    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.516799E-05  2.226193E-02 -2.069272E-06 -2.957771E-03  2.387239E-02 -3.565157E-04
# Covariance matrix:
  4.6116E-13  2.3983E-14  3.5218E-14 -3.6016E-14  3.0290E-13  3.7614E-12
  2.3983E-14  1.3363E-12  1.2516E-13 -3.5716E-13  6.5624E-13  3.3684E-11
  3.5218E-14  1.2516E-13  2.8569E-13 -1.5714E-13  9.2365E-14  3.3372E-12
 -3.6016E-14 -3.5716E-13 -1.5714E-13  1.8192E-13 -1.7934E-13 -9.5826E-12
  3.0290E-13  6.5624E-13  9.2365E-14 -1.7934E-13  6.3878E-13  1.7390E-11
  3.7614E-12  3.3684E-11  3.3372E-12 -9.5826E-12  1.7390E-11  9.0338E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -15.643831   32.839111    0.932126   -0.108042   -0.386312  2456888.881388
# Heliocentric elements and errors
Epoch:              2456880.5000  =  2014/08/11
Mean Anomaly:          219.93048 +/-     0.854
Argument of Peri:       28.06483 +/-     0.852
Long of Asc Node:      149.15577 +/-     0.003
Inclination:            17.37345 +/-     0.000
Eccentricity:         0.06604797 +/-    0.0008
Semi-Major Axis:     40.18366074 +/-    0.0039
Time of Perihelion: 2493080.9372 +/-     220.6
Perihelion:          37.52961151 +/-    0.0325
Aphelion:            42.83770998 +/-    0.0326
Period (y)              254.7314 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           34.73147272 +/-    0.0011
Ecliptic Y           21.31076787 +/-    0.0007
Ecliptic Z          -11.29584249 +/-    0.0004
Ecliptic XDOT        -0.00149935 +/-    0.0000
Ecliptic YDOT         0.00206990 +/-    0.0000
Ecliptic ZDOT        -0.00031551 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.28498648 +/-    0.0010
Geocenter to KBO     41.88939534 +/-    0.0014
# Hcoef:  7.36

The following table shows the complete astrometric record for 16SB56. 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 (16SB56) followed by the observatory code and reference code for the source of the astrometry.

2014 08  19.38061  02 23 43.755  -02 16 28.44  23.5r 16SB56    W84  C~52Zm      
2014 10  01.36775  02 21 55.953  -02 39 22.65  23.6r 16SB56    W84  C~52Zm      
2014 10  01.36912  02 21 55.929  -02 39 22.99  23.4i 16SB56    W84  C~52Zm      
2014 10  23.30444  02 20 21.786  -02 50 26.02  24.1g 16SB56    W84  C~52Zm      
2014 12  16.15719  02 16 41.446  -03 02 31.29  23.8i 16SB56    W84  C~52Zn      
2014 12  24.13761  02 16 21.165  -03 01 49.69  23.2r 16SB56    W84  C~52Zn      
2016 09  24.28192  02 32 31.589  -02 03 25.72  23.9r 16SB56    W84  C~52Zn      
2016 09  27.43969  02 32 20.49   -02 05 09.3   24.3g 16SB56    568  C~2eAH      
2016 09  27.51196  02 32 20.23   -02 05 11.7   24.7g 16SB56    568  C~2eAH      
2016 09  28.44870  02 32 16.82   -02 05 42.4   24.5g 16SB56    568  C~2eAH      
2016 09  28.56839  02 32 16.38   -02 05 46.3   24.4g 16SB56    568  C~2eAH      
2016 09  29.46036  02 32 13.10   -02 06 15.4   24.5g 16SB56    568  C~2eAH      
2016 09  29.52080  02 32 12.87   -02 06 17.3   24.4g 16SB56    568  C~2eAH      
2016 10  27.21403  02 30 14.648  -02 20 00.48  23.0r 16SB56    W84  C~52Zn      
2016 10  27.25772  02 30 14.432  -02 20 01.38  22.5i 16SB56    W84  C~52Zn      
2016 12  05.18383  02 27 24.236  -02 30 20.82  23.2i 16SB56    W84  C~52Zn      
2017 12  09.09111  02 32 15.993  -02 14 23.93  22.2i 16SB56    W84  C~52Zn      

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    -0.09       0.00     0.02
     2   0.1177  -1982.07     0.23    -755.06     0.15
     3   0.1177  -1982.52    -0.13    -755.26    -0.04
     4   0.1778  -3533.79     0.01    -909.15     0.03
     5   0.3252  -6889.67     0.05    -492.10    -0.04
     6   0.3470  -7162.56    -0.08    -351.61    -0.13
     7   2.0997   7720.38     0.11   -1915.31    -0.19
     8   2.1083   7528.62    -0.03   -1957.00     0.12
     9   2.1085   7524.13     0.04   -1957.95     0.06
    10   2.1111   7465.60    -0.15   -1969.70     0.03
    11   2.1114   7458.07    -0.03   -1971.16    -0.00
    12   2.1138   7401.91     0.01   -1982.06    -0.05
    13   2.1140   7398.02     0.03   -1982.69     0.01
    14   2.1898   5450.54     0.08   -2163.08    -0.10
    15   2.1899   5447.19     0.01   -2162.84     0.16
    16   2.2965   2835.25    -0.04   -1890.76    -0.03
    17   3.3065   7278.62    -0.02   -2457.11     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.

16SB56    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        40.451    40.461    40.440
ecceobj         0.058     0.058     0.059
incobj         17.337    17.337    17.337
qmin           36.509    36.884    36.510
qmax           44.228    43.849    44.148
amean          40.237    40.249    40.222
amin           39.915    39.933    39.899
amax           40.586    40.575    40.552
emean           0.068     0.066     0.069
emin            0.051     0.054     0.050
emax            0.090     0.081     0.089
imean          16.656    16.651    16.654
imin           15.703    15.716    15.706
imax           17.811    17.754    17.787
excite_mean     0.295     0.294     0.295
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       180.3     175.2     179.6
kozaiamp        180.0     180.0     180.0