Orbit Fit and Astrometric record for 16SS46

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: 16SS46    
# Created Mon Dec  6 02:13:52 2021
# Orbit generated from Bernstein formalism
# Fitting     24 observations of     30
# Arc:   3.34y
# First observation: 2014/08/19
#  Last observation: 2017/12/20
Preliminary a, adot, b, bdot, g, gdot:
  -0.000006   0.040852   0.000021  -0.002985   0.032930   0.000000
# Chi-squared of fit:    14.32 DOF:     42 RMS:  0.14
# Min/Max residuals:    -0.53    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.902628E-05  3.987485E-02 -1.256846E-06 -2.896263E-03  3.223073E-02 -2.853701E-03
# Covariance matrix:
  3.1895E-13 -1.6140E-13  6.2124E-15  8.9795E-15  6.7893E-14 -7.4606E-13
 -1.6140E-13  5.4100E-13  5.1310E-14 -6.1460E-14  2.7504E-13  4.6639E-12
  6.2124E-15  5.1310E-14  2.4734E-13 -1.0185E-13  4.8222E-14  4.6554E-13
  8.9795E-15 -6.1460E-14 -1.0185E-13  5.8145E-14 -3.3374E-14 -5.8556E-13
  6.7893E-14  2.7504E-13  4.8222E-14 -3.3374E-14  3.0987E-13  2.4366E-12
 -7.4606E-13  4.6639E-12  4.6554E-13 -5.8556E-13  2.4366E-12  4.4546E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -14.501027   36.014946    0.952874   -0.087258   -0.337905  2456888.888358
# Heliocentric elements and errors
Epoch:              2456880.5000  =  2014/08/11
Mean Anomaly:          342.03822 +/-     0.023
Argument of Peri:      282.80621 +/-     0.042
Long of Asc Node:      142.31250 +/-     0.001
Inclination:            15.04742 +/-     0.000
Eccentricity:         0.25028989 +/-    0.0001
Semi-Major Axis:     40.70775215 +/-    0.0036
Time of Perihelion: 2461613.7655 +/-       6.1
Perihelion:          30.51901322 +/-    0.0049
Aphelion:            50.89649108 +/-    0.0061
Period (y)              259.7311 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           25.13652843 +/-    0.0004
Ecliptic Y           17.09859853 +/-    0.0003
Ecliptic Z           -7.76894765 +/-    0.0001
Ecliptic XDOT        -0.00223620 +/-    0.0000
Ecliptic YDOT         0.00256126 +/-    0.0000
Ecliptic ZDOT        -0.00017737 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.37775774 +/-    0.0004
Geocenter to KBO     31.02628750 +/-    0.0005
# Hcoef:  8.65

The following table shows the complete astrometric record for 16SS46. 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 (16SS46) followed by the observatory code and reference code for the source of the astrometry.

2014 08  19.38758  02 33 49.129  -00 11 19.57  24.1r 16SS46    W84  C~55Zv      
2014 09  24.29476  02 32 19.968  -00 34 02.10  24.1i 16SS46    W84  C~55Zv      
2014 10  21.31713  02 30 01.004  -00 51 36.29  23.4r 16SS46    W84  C~55Zv      
2014 10  23.30858  02 29 49.420  -00 52 46.05  24.0g 16SS46    W84  C~55Zv      
2014 10  29.29309  02 29 14.128  -00 56 04.72  23.2i 16SS46    W84  C~55Zv      
2015 12  14.16575  02 34 09.104  -00 33 56.75  24.0i 16SS46    W84  C~55Zv      
2015 12  14.16712  02 34 09.085  -00 33 56.55  23.8r 16SS46    W84  C~55Zv      
2015 12  14.16849  02 34 09.088  -00 33 56.57  24.2g 16SS46    W84  C~55Zv      
2016 09  22.283796 02 50 32.02   +00 37 31.2   23.5i 16SS46    W84  C~2B0K      
2016 09  22.289097 02 50 32.01   +00 37 30.9   23.2z 16SS46    W84  C~2B0K      
2016 09  24.27777  02 50 24.332  +00 36 11.83  23.4r 16SS46    W84  C~55Zv      
2016 09  27.44396  02 50 11.35   +00 34 05.7   24.1g 16SS46    568  C~2NQ0      
2016 09  27.51628  02 50 11.04   +00 34 02.8   24.0g 16SS46    568  C~2NQ0      
2016 09  28.45298  02 50 07.03   +00 33 25.6   24.3g 16SS46    568  C~2NQ0      
2016 09  28.57265  02 50 06.50   +00 33 20.9   24.5g 16SS46    568  C~2NQ0      
2016 09  29.206921 02 50 03.73   +00 32 56.2   23.4r 16SS46    W84  C~2B0K      
2016 10  05.178484 02 49 36.07   +00 29 00.9   23.3r 16SS46    W84  C~2B0K      
2016 10  05.180845 02 49 36.06   +00 29 00.6   23.5i 16SS46    W84  C~2B0K      
2016 10  10.173299 02 49 10.97   +00 25 47.1   23.4r 16SS46    W84  C~2B0K      
2016 10  10.175648 02 49 10.96   +00 25 47.2   23.6i 16SS46    W84  C~2B0K      
2016 10  10.179618 02 49 10.94   +00 25 46.9   23.4z 16SS46    W84  C~2B0K      
2016 10  27.115301 02 47 35.94   +00 15 39.1   23.6r 16SS46    W84  C~2B0K      
2016 10  29.22268  02 47 23.411  +00 14 31.34  22.7i 16SS46    W84  C~55Zv      
2016 11  10.26627  02 46 10.768  +00 08 45.13  22.0z 16SS46    W84  C~55Zv      
2017 08  27.40776  03 00 36.703  +01 28 55.71  23.8r 16SS46    W84  C~55Zv      
2017 09  18.33217  02 59 53.831  +01 15 43.14  24.1g 16SS46    W84  C~55Zv      
2017 12  09.12014  02 52 39.097  +00 36 54.01  23.0r 16SS46    W84  C~55Zv      
2017 12  09.12152  02 52 39.112  +00 36 54.09  23.9g 16SS46    W84  C~55Zv      
2017 12  20.27929  02 51 48.673  +00 36 44.96  23.3R 16SS46    G37  C~4UMZ      
2017 12  20.35598  02 51 48.359  +00 36 45.44        16SS46    G37  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     0.11       0.00    -0.03
     2   0.0983  -1704.69     0.13    -859.83    -0.10
     3   0.1723  -4017.82    -0.09   -1187.68     0.02
     4   0.1777  -4204.84    -0.12   -1197.87    -0.06
     5   0.1941  -4770.21    -0.04   -1215.81    -0.02
     6   1.3190   -152.99     0.07   -1381.43    -0.11
     7   1.3190   -153.20    -0.05   -1381.15     0.14
     8   1.3190   -153.16     0.07   -1381.19     0.08
     9   2.0942  15214.30    -0.17   -2068.20     0.23
    10   2.0942  15214.06    -0.04   -2068.43     0.09
    11   2.0996  15078.87     0.10   -2106.34    -0.07
    12   2.1083  14852.76     0.05   -2163.24    -0.05
    13   2.1085  14847.40     0.11   -2164.49    -0.09
    14   2.1111  14778.13     0.10   -2180.39    -0.06
    15   2.1114  14769.05     0.15   -2182.29    -0.02
    16   2.1131  14721.52    -0.00   -2192.33     0.29
    17   2.1295  14250.71 (  -0.26)  -2281.77 (   0.81)
    18   2.1295  14250.47 (  -0.31)  -2282.01 (   0.60)
    19   2.1432  13829.95 (  -0.38)  -2344.19 (   0.60)
    20   2.1432  13829.84 (  -0.28)  -2344.05 (   0.76)
    21   2.1432  13829.46 (  -0.32)  -2344.23 (   0.62)
    22   2.1895  12278.45    -0.53   -2461.05     0.24
    23   2.1953  12078.00 (   0.00)  -2464.68 (   0.42)
    24   2.2283  10931.27     0.07   -2441.47    -0.23
    25   3.0226  24885.81    -0.08   -2063.02    -0.12
    26   3.0827  24010.92    -0.01   -2610.93     0.01
    27   3.3066  17018.59    -0.10   -2719.03    -0.06
    28   3.3066  17018.83     0.24   -2719.03    -0.08
    29   3.3371  16294.64    -0.02   -2483.31    -0.10
    30   3.3374  16290.30     0.04   -2481.33     0.08

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.

16SS46    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        41.028    41.036    41.019
ecceobj         0.254     0.254     0.254
incobj         15.028    15.028    15.028
qmin           29.323    29.684    29.389
qmax           52.227    53.337    61.242
amean          38.980    40.232    41.621
amin           35.637    38.708    37.385
amax           41.766    41.873    45.744
emean           0.217     0.234     0.265
emin            0.129     0.198     0.169
emax            0.256     0.274     0.341
imean          12.799    12.300    12.646
imin           11.111    10.213    10.785
imax           14.621    14.957    14.905
excite_mean     0.310     0.317     0.345
fracstop        0.156     0.255     0.365
cjmean          2.938     2.942     2.932

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       182.3     191.4     161.8
kozaiamp        179.9     179.9     179.9