Orbit Fit and Astrometric record for 16SR58

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: 16SR58    
# Created Fri Dec  3 02:13:54 2021
# Orbit generated from Bernstein formalism
# Fitting     22 observations of     22
# Arc:   4.05y
# First observation: 2013/10/29
#  Last observation: 2017/11/15
Preliminary a, adot, b, bdot, g, gdot:
   0.000074   0.033064   0.000037   0.015731   0.028159   0.000000
# Chi-squared of fit:     5.46 DOF:     38 RMS:  0.09
# Min/Max residuals:    -0.19    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.811491E-05  3.347322E-02  9.293296E-06  1.593921E-02  2.855569E-02  3.633280E-03
# Covariance matrix:
  9.0144E-13 -8.0730E-13  2.3016E-13 -3.1802E-13 -4.1573E-13 -4.8319E-12
 -8.0730E-13  1.0232E-12 -3.1520E-13  4.5698E-13  3.1122E-13  6.9931E-12
  2.3016E-13 -3.1520E-13  3.8717E-13 -2.4983E-13 -1.0466E-13 -2.2560E-12
 -3.1802E-13  4.5698E-13 -2.4983E-13  2.6389E-13  1.2369E-13  3.3038E-12
 -4.1573E-13  3.1122E-13 -1.0466E-13  1.2369E-13  4.4075E-13  1.8306E-12
 -4.8319E-12  6.9931E-12 -2.2560E-12  3.3038E-12  1.8306E-12  5.0631E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -14.613700   32.722449   -0.049144   -0.249965   -0.959187  2456594.658628
# Heliocentric elements and errors
Epoch:              2456590.5000  =  2013/10/25
Mean Anomaly:            3.81894 +/-     0.006
Argument of Peri:      313.36479 +/-     0.028
Long of Asc Node:       60.13427 +/-     0.000
Inclination:            28.89032 +/-     0.000
Eccentricity:         0.55790867 +/-    0.0002
Semi-Major Axis:     80.24485078 +/-    0.0258
Time of Perihelion: 2453805.2480 +/-       4.5
Perihelion:          35.47555290 +/-    0.0169
Aphelion:           125.01414867 +/-    0.0421
Period (y)              718.8429 +/-      0.35
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           29.31505490 +/-    0.0007
Ecliptic Y           18.89810823 +/-    0.0004
Ecliptic Z           -8.83511870 +/-    0.0002
Ecliptic XDOT        -0.00113307 +/-    0.0000
Ecliptic YDOT         0.00308905 +/-    0.0000
Ecliptic ZDOT         0.00139103 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.98013704 +/-    0.0006
Geocenter to KBO     35.01928751 +/-    0.0008
# Hcoef:  7.68

The following table shows the complete astrometric record for 16SR58. 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 (16SR58) followed by the observatory code and reference code for the source of the astrometry.

2013 10  29.15785  02 21 55.506  -01 20 29.38  23.7g 16SR58    W84  C~55Zx      
2014 08  19.38758  02 32 16.537  +00 35 47.00  23.4r 16SR58    W84  C~55Zx      
2014 08  19.38895  02 32 16.531  +00 35 47.03  23.4z 16SR58    W84  C~55Zx      
2014 08  19.39031  02 32 16.532  +00 35 46.95  22.9i 16SR58    W84  C~55Zx      
2014 09  24.29476  02 30 47.063  +00 22 29.26  22.3i 16SR58    W84  C~55Zx      
2014 09  24.29614  02 30 47.059  +00 22 29.05  24.3g 16SR58    W84  C~55Zx      
2014 10  01.34252  02 30 17.102  +00 19 34.17  23.2r 16SR58    W84  C~55Zx      
2014 10  21.31020  02 28 38.209  +00 11 53.63  23.2r 16SR58    W84  C~55Zx      
2014 10  21.31157  02 28 38.199  +00 11 53.66  24.1g 16SR58    W84  C~55Zx      
2015 11  22.14137  02 31 44.759  +01 33 18.67  22.7z 16SR58    W84  C~55Zx      
2016 09  10.36578  02 43 14.934  +03 23 16.59  23.7r 16SR58    W84  C~55Zx      
2016 09  27.61245  02 42 16.16   +03 17 11.4   24.1g 16SR58    568  C~2eAJ      
2016 09  27.61246  02 42 16.16   +03 17 11.4   24.1g 16SR58    568  C~55Zx      
2016 09  28.50135  02 42 12.52   +03 16 51.8   23.9g 16SR58    568  C~2eAJ      
2016 09  28.54927  02 42 12.32   +03 16 50.8   23.9g 16SR58    568  C~2eAJ      
2016 09  28.63420  02 42 11.96   +03 16 48.9   24.1g 16SR58    568  C~2eAJ      
2016 09  28.63421  02 42 11.96   +03 16 48.9   24.1g 16SR58    568  C~55Zx      
2016 09  29.51325  02 42 08.30   +03 16 29.5   24.0g 16SR58    568  C~2eAJ      
2016 11  11.11619  02 38 31.409  +03 03 00.24  22.2z 16SR58    W84  C~55Zx      
2016 12  21.12333  02 35 28.100  +03 01 38.18  22.7i 16SR58    W84  C~55Zx      
2017 11  15.14825  02 44 01.031  +04 29 18.27  22.4i 16SR58    W84  C~55Zx      
2017 11  15.14962  02 44 01.025  +04 29 18.28  22.6r 16SR58    W84  C~55Zx      

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    -0.10
     2   0.8056  11125.49    -0.01    3456.48    -0.03
     3   0.8056  11125.41    -0.06    3456.54     0.05
     4   0.8056  11125.40    -0.05    3456.46    -0.02
     5   0.9039   9589.53     0.19    3153.41     0.15
     6   0.9039   9589.41     0.15    3153.23    -0.03
     7   0.9232   9106.39    -0.03    3138.82    -0.05
     8   0.9778   7551.74    -0.11    3201.46    -0.02
     9   0.9778   7551.61    -0.12    3201.54     0.04
    10   2.0643  11836.98    -0.19    6876.48    -0.08
    11   2.8671  23896.99     0.06    9676.92    -0.07
    12   2.9143  22932.05     0.01    9622.92     0.03
    13   2.9143  22932.05     0.01    9622.92     0.03
    14   2.9168  22873.35    -0.03    9622.46     0.02
    15   2.9169  22870.15     0.03    9622.51     0.06
    16   2.9171  22864.35     0.01    9622.50     0.05
    17   2.9171  22864.35     0.01    9622.50     0.05
    18   2.9195  22805.44    -0.03    9622.33     0.05
    19   3.0362  19435.16    -0.17    9937.15    -0.08
    20   3.1457  16797.86     0.26   10775.97     0.13
    21   4.0465  25909.18    -0.01   13226.38    -0.10
    22   4.0465  25909.10     0.02   13226.41    -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.

16SR58    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        81.362    81.452    81.273
ecceobj         0.564     0.565     0.564
incobj         28.883    28.883    28.883
qmin           34.204    33.546    34.006
qmax          128.631   129.138   129.014
amean          80.029    80.028    80.029
amin           78.807    78.851    78.656
amax           81.876    81.714    81.942
emean           0.560     0.567     0.557
emin            0.543     0.549     0.543
emax            0.573     0.581     0.575
imean          27.538    26.841    27.812
imin           26.953    26.206    26.918
imax           28.471    28.008    28.507
excite_mean     0.726     0.725     0.726
fracstop        1.000     1.000     1.000
cjmean          2.772     2.772     2.772

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       165.9     209.6     147.8
kozaiamp        180.0     180.0     180.0