Orbit Fit and Astrometric record for 16SN56

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: 16SN56    
# Created Tue Nov 30 02:14:00 2021
# Orbit generated from Bernstein formalism
# Fitting     30 observations of     30
# Arc:   4.24y
# First observation: 2014/08/19
#  Last observation: 2018/11/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000093   0.019481  -0.000053   0.008463   0.022900   0.000000
# Chi-squared of fit:    10.13 DOF:     54 RMS:  0.10
# Min/Max residuals:    -0.29    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.349830E-05  1.898195E-02  5.170544E-06  8.254697E-03  2.234481E-02 -3.790409E-03
# Covariance matrix:
  3.9431E-13 -1.9350E-13  4.5174E-14 -4.7440E-14  1.6284E-15 -1.3257E-12
 -1.9350E-13  2.8061E-13 -7.3130E-14  1.0993E-13  2.7036E-13  3.1465E-12
  4.5174E-14 -7.3130E-14  3.2639E-13 -1.4065E-13 -5.4138E-14 -1.0138E-12
 -4.7440E-14  1.0993E-13 -1.4065E-13  9.5366E-14  1.1505E-13  1.4752E-12
  1.6284E-15  2.7036E-13 -5.4138E-14  1.1505E-13  4.7755E-13  3.3459E-12
 -1.3257E-12  3.1465E-12 -1.0138E-12  1.4752E-12  3.3459E-12  4.2147E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -13.439179   34.519874    0.943426   -0.086741   -0.363571  2456888.891088
# Heliocentric elements and errors
Epoch:              2456880.5000  =  2014/08/11
Mean Anomaly:          285.38208 +/-     0.038
Argument of Peri:       66.82772 +/-     0.022
Long of Asc Node:       61.43689 +/-     0.001
Inclination:            26.66434 +/-     0.001
Eccentricity:         0.20102495 +/-    0.0003
Semi-Major Axis:     45.75401136 +/-    0.0082
Time of Perihelion: 2480311.0701 +/-      10.3
Perihelion:          36.55631364 +/-    0.0156
Aphelion:            54.95170908 +/-    0.0172
Period (y)              309.4938 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           36.70377825 +/-    0.0011
Ecliptic Y           24.10330248 +/-    0.0008
Ecliptic Z          -10.40099244 +/-    0.0003
Ecliptic XDOT        -0.00150140 +/-    0.0000
Ecliptic YDOT         0.00178924 +/-    0.0000
Ecliptic ZDOT         0.00109179 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.12557115 +/-    0.0010
Geocenter to KBO     44.75311722 +/-    0.0014
# Hcoef:  7.16

The following table shows the complete astrometric record for 16SN56. 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 (16SN56) followed by the observatory code and reference code for the source of the astrometry.

2014 08  19.39031  02 26 57.039  +00 20 39.62  22.8i 16SN56    W84  C~52Zn      
2014 10  01.36230  02 25 09.722  +00 04 55.96  23.7r 16SN56    W84  C~52Zn      
2014 10  23.30026  02 23 37.549  -00 03 05.46  24.2g 16SN56    W84  C~52Zn      
2016 09  10.36303  02 33 20.994  +01 50 36.29  23.9r 16SN56    W84  C~52Zn      
2016 09  27.45294  02 32 28.23   +01 44 17.8   24.2g 16SN56    568  C~2eAI      
2016 09  27.57248  02 32 27.80   +01 44 15.0   24.1g 16SN56    568  C~2eAI      
2016 09  27.62188  02 32 27.61   +01 44 13.9   24.1g 16SN56    568  C~2eAI      
2016 09  28.46202  02 32 24.58   +01 43 54.9   24.4g 16SN56    568  C~2eAI      
2016 09  28.52267  02 32 24.35   +01 43 53.6   24.1g 16SN56    568  C~2eAI      
2016 09  28.58192  02 32 24.13   +01 43 52.2   24.3g 16SN56    568  C~2eAI      
2016 09  29.47382  02 32 20.86   +01 43 32.1   24.1g 16SN56    568  C~2eAI      
2016 09  29.53424  02 32 20.63   +01 43 30.7   24.3g 16SN56    568  C~2eAI      
2016 09  29.59403  02 32 20.40   +01 43 29.3   24.2g 16SN56    568  C~2eAI      
2016 11  04.17111  02 29 47.209  +01 31 28.17  24.1r 16SN56    W84  C~52Zn      
2016 11  04.17248  02 29 47.220  +01 31 28.27  23.2i 16SN56    W84  C~52Zn      
2016 11  04.18347  02 29 47.174  +01 31 27.70  23.3r 16SN56    W84  C~52Zn      
2016 11  04.18483  02 29 47.171  +01 31 27.83  23.2i 16SN56    W84  C~52Zn      
2016 11  04.18620  02 29 47.166  +01 31 27.97  24.2g 16SN56    W84  C~52Zn      
2016 11  04.18757  02 29 47.153  +01 31 27.78  23.7r 16SN56    W84  C~52Zn      
2016 11  04.20412  02 29 47.073  +01 31 27.51  23.5r 16SN56    W84  C~52Zn      
2016 11  04.20551  02 29 47.072  +01 31 27.65  22.9i 16SN56    W84  C~52Zn      
2017 09  18.32531  02 36 34.621  +02 37 16.95  23.9g 16SN56    W84  C~52Zn      
2017 10  13.24395  02 35 02.502  +02 28 13.50  23.9r 16SN56    W84  C~52Zn      
2017 12  08.03433  02 30 59.307  +02 15 54.04  23.4i 16SN56    W84  C~52Zn      
2017 12  24.07072  02 30 09.118  +02 16 34.79  23.4r 16SN56    W84  C~52Zn      
2018 01  05.06399  02 29 43.669  +02 18 34.86  24.2g 16SN56    W84  C~52Zn      
2018 09  11.34100  02 40 31.524  +03 29 34.78  23.8r 16SN56    W84  C~52Zn      
2018 09  11.34236  02 40 31.510  +03 29 34.88  23.9i 16SN56    W84  C~52Zn      
2018 09  11.34373  02 40 31.513  +03 29 34.55  23.7g 16SN56    W84  C~52Zn      
2018 11  16.14400  02 36 07.502  +03 08 34.54  22.8i 16SN56    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    -0.01       0.00     0.14
     2   0.1177  -1830.17     0.02    -363.93    -0.18
     3   0.1777  -3294.41     0.04    -365.58    -0.01
     4   2.0615   7211.66     0.04    3214.44    -0.12
     5   2.1083   6339.21    -0.07    3115.41     0.15
     6   2.1086   6332.20     0.03    3114.87     0.01
     7   2.1088   6329.14    -0.08    3114.76     0.07
     8   2.1111   6279.95     0.00    3111.67     0.05
     9   2.1112   6276.26    -0.03    3111.57     0.14
    10   2.1114   6272.68    -0.03    3111.32     0.07
    11   2.1138   6219.72     0.03    3108.36     0.12
    12   2.1140   6216.00    -0.00    3108.17     0.10
    13   2.1142   6212.28    -0.07    3107.97     0.07
    14   2.2116   3804.12    -0.26    3178.34     0.08
    15   2.2116   3804.31     0.03    3178.38     0.11
    16   2.2116   3803.47    -0.03    3178.06    -0.29
    17   2.2116   3803.47     0.07    3178.20    -0.16
    18   2.2116   3803.45     0.14    3178.36    -0.01
    19   2.2116   3803.20    -0.01    3178.24    -0.14
    20   2.2117   3801.98    -0.05    3178.38    -0.13
    21   2.2117   3802.01     0.08    3178.52    -0.00
    22   3.0826  10878.70     0.02    4916.06    -0.06
    23   3.1509   9392.43     0.18    4852.64     0.04
    24   3.3036   5700.34     0.04    5345.25     0.00
    25   3.3475   5002.28     0.00    5630.10    -0.05
    26   3.3804   4680.97    -0.00    5868.60    -0.09
    27   4.0628  15277.99     0.07    6733.29     0.09
    28   4.0628  15277.82    -0.04    6733.45     0.26
    29   4.0628  15277.76    -0.04    6733.13    -0.05
    30   4.2430  11110.23    -0.07    6827.81    -0.21

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.

16SN56    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        46.052    46.074    46.031
ecceobj         0.197     0.198     0.197
incobj         26.621    26.622    26.621
qmin           35.902    36.170    35.978
qmax           56.021    55.821    55.925
amean          45.770    45.782    45.723
amin           45.360    45.394    45.337
amax           46.263    46.228    46.188
emean           0.194     0.196     0.193
emin            0.175     0.185     0.175
emax            0.212     0.208     0.211
imean          25.604    25.570    25.583
imin           25.076    25.275    25.098
imax           26.094    25.897    26.010
excite_mean     0.474     0.474     0.473
fracstop        1.000     1.000     1.000
cjmean          2.840     2.840     2.840

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       185.1     175.7     182.0
kozaiamp        180.0     180.0     179.9