Orbit Fit and Astrometric record for 16SJ58

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: 16SJ58    
# Created Fri Dec  3 02:13:54 2021
# Orbit generated from Bernstein formalism
# Fitting     19 observations of     19
# Arc:   4.28y
# First observation: 2014/08/19
#  Last observation: 2018/12/01
Preliminary a, adot, b, bdot, g, gdot:
  -0.000274   0.037186  -0.000105   0.009138   0.031007   0.000000
# Chi-squared of fit:     6.23 DOF:     32 RMS:  0.10
# Min/Max residuals:    -0.19    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.883720E-05  3.609703E-02  4.969860E-06  8.848037E-03  3.063535E-02 -3.914407E-03
# Covariance matrix:
  4.0425E-13 -1.8681E-13  3.8396E-14 -3.7534E-14  1.7017E-13 -1.2588E-12
 -1.8681E-13  3.2456E-13 -4.1147E-14  8.3505E-14  6.4532E-14  2.6339E-12
  3.8396E-14 -4.1147E-14  2.2536E-13 -8.7649E-14  2.0823E-14 -4.1470E-13
 -3.7534E-14  8.3505E-14 -8.7649E-14  6.4010E-14  1.2459E-14  7.7868E-13
  1.7017E-13  6.4532E-14  2.0823E-14  1.2459E-14  2.7946E-13  2.9145E-13
 -1.2588E-12  2.6339E-12 -4.1470E-13  7.7868E-13  2.9145E-13  2.4677E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -16.067529   33.942782    0.939679   -0.105906   -0.368178  2456888.881388
# Heliocentric elements and errors
Epoch:              2456880.5000  =  2014/08/11
Mean Anomaly:          339.51304 +/-     0.016
Argument of Peri:      345.53942 +/-     0.032
Long of Asc Node:       81.31007 +/-     0.001
Inclination:            20.63353 +/-     0.000
Eccentricity:         0.27642957 +/-    0.0001
Semi-Major Axis:     43.70328802 +/-    0.0043
Time of Perihelion: 2462885.9359 +/-       4.7
Perihelion:          31.62240700 +/-    0.0048
Aphelion:            55.78416903 +/-    0.0066
Period (y)              288.9212 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           26.86180848 +/-    0.0005
Ecliptic Y           16.95057159 +/-    0.0003
Ecliptic Z           -9.03419243 +/-    0.0002
Ecliptic XDOT        -0.00190346 +/-    0.0000
Ecliptic YDOT         0.00260645 +/-    0.0000
Ecliptic ZDOT         0.00085679 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.02264776 +/-    0.0004
Geocenter to KBO     32.64203336 +/-    0.0006
# Hcoef:  8.73

The following table shows the complete astrometric record for 16SJ58. 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 (16SJ58) followed by the observatory code and reference code for the source of the astrometry.

2014 08  19.38061  02 28 18.090  -02 19 16.66  23.6r 16SJ58    W84  C~52Zn      
2014 09  24.28782  02 26 40.982  -02 38 56.48  23.6g 16SJ58    W84  C~52Zn      
2014 09  24.28920  02 26 40.951  -02 38 56.42  24.7r 16SJ58    W84  C~52Zn      
2014 10  01.36639  02 26 08.354  -02 42 59.61  24.5g 16SJ58    W84  C~52Zn      
2014 12  16.15858  02 19 29.779  -03 02 35.35  24.1g 16SJ58    W84  C~52Zn      
2014 12  24.13761  02 19 03.951  -03 00 37.65  24.4r 16SJ58    W84  C~52Zn      
2015 12  11.17615  02 27 02.624  -01 53 03.71  24.0g 16SJ58    W84  C~52Zn      
2016 09  27.53877  02 40 59.88   -00 18 37.0   24.6g 16SJ58    568  C~2eAJ      
2016 09  27.59860  02 40 59.61   -00 18 38.9   24.5g 16SJ58    568  C~2eAJ      
2016 09  28.48764  02 40 55.66   -00 19 07.7   24.5g 16SJ58    568  C~2eAJ      
2016 09  29.49961  02 40 51.07   -00 19 40.5   24.6g 16SJ58    568  C~2eAJ      
2016 09  29.62023  02 40 50.51   -00 19 44.4   24.4g 16SJ58    568  C~2eAJ      
2016 10  28.22302  02 38 16.868  -00 33 42.39  24.0g 16SJ58    W84  C~52Zn      
2016 11  29.12930  02 35 13.610  -00 41 49.84  24.0r 16SJ58    W84  C~52Zn      
2017 10  29.29518  02 45 36.367  +00 38 26.28  23.3i 16SJ58    W84  C~52Zn      
2017 10  29.29656  02 45 36.363  +00 38 26.23  23.9r 16SJ58    W84  C~52Zn      
2017 11  22.17304  02 43 15.274  +00 31 20.01  23.7r 16SJ58    W84  C~52Zn      
2018 12  01.08037  02 49 53.752  +01 43 01.15  23.7r 16SJ58    W84  C~52Zn      
2018 12  01.08175  02 49 53.756  +01 43 01.42  24.0g 16SJ58    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    -0.04       0.00    -0.08
     2   0.0983  -1763.20     0.13    -633.28    -0.12
     3   0.0983  -1763.62    -0.19    -633.07     0.11
     4   0.1177  -2304.98    -0.00    -701.52    -0.01
     5   0.3252  -8334.68     0.23     154.41    -0.07
     6   0.3470  -8661.98    -0.04     392.89    -0.08
     7   1.3109   -548.47    -0.18    1858.29     0.13
     8   2.1086  13194.63     0.01    3054.59     0.02
     9   2.1087  13190.16     0.03    3054.13     0.06
    10   2.1112  13124.44     0.05    3046.55     0.10
    11   2.1139  13048.29    -0.05    3038.37     0.10
    12   2.1143  13039.04     0.01    3037.47     0.09
    13   2.1926  10578.66     0.11    3009.44     0.02
    14   2.2799   7817.93    -0.02    3459.36     0.06
    15   3.1948  18273.98     0.03    4919.86    -0.15
    16   3.1948  18273.91     0.09    4919.83    -0.19
    17   3.2602  16120.76    -0.14    5217.75     0.00
    18   4.2839  23254.93    -0.13    7320.04    -0.11
    19   4.2839  23255.08     0.13    7320.28     0.10

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.

16SJ58    quality flag:3

Type:         7:4EII    7:4EEE    7:4EII
Type:                   7:4EII          

axisobj        44.076    44.088    44.063
ecceobj         0.280     0.280     0.280
incobj         20.636    20.636    20.636
qmin           31.242    31.247    31.095
qmax           56.772    56.761    57.085
amean          43.725    43.725    43.725
amin           43.314    43.338    43.289
amax           44.252    44.209    44.267
emean           0.213     0.131     0.221
emin            0.069     0.036     0.088
emax            0.284     0.284     0.290
imean          21.094    22.901    20.833
imin           18.882    18.863    18.399
imax           24.072    24.743    24.001
excite_mean     0.424     0.420     0.423
fracstop        1.000     1.000     1.000
cjmean          2.879     2.880     2.880

libcent 0       180.1     183.5     177.9
libamp  0       130.6     170.0     154.8
libcent 1      -180.0     181.9    -180.0
libamp  1      -180.0     119.8    -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       126.5     152.1     140.0
kozaiamp        180.0     180.0     180.0