Orbit Fit and Astrometric record for 16RK82

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: 16RK82    
# Created Sat Dec  4 02:13:54 2021
# Orbit generated from Bernstein formalism
# Fitting     14 observations of     14
# Arc:   4.02y
# First observation: 2014/11/21
#  Last observation: 2018/11/28
Preliminary a, adot, b, bdot, g, gdot:
  -0.000278   0.028318   0.000005   0.000567   0.026707   0.000000
# Chi-squared of fit:     3.54 DOF:     22 RMS:  0.09
# Min/Max residuals:    -0.25    0.14
# Exact a, adot, b, bdot, g, gdot:
  1.694879E-05  2.779991E-02  1.487361E-07  5.696696E-04  2.641823E-02 -3.297895E-03
# Covariance matrix:
  1.1690E-12 -1.0460E-12  1.3693E-14 -1.4269E-14 -2.5342E-13 -7.0016E-12
 -1.0460E-12  1.6316E-12 -5.4276E-14  2.7618E-14 -1.7234E-13  1.2874E-11
  1.3693E-14 -5.4276E-14  5.7240E-13 -1.9698E-13  4.7795E-14 -4.5847E-13
 -1.4269E-14  2.7618E-14 -1.9698E-13  8.2793E-14 -5.3686E-15  2.2991E-13
 -2.5342E-13 -1.7234E-13  4.7795E-14 -5.3686E-15  9.2247E-13 -1.5934E-12
 -7.0016E-12  1.2874E-11 -4.5847E-13  2.2991E-13 -1.5934E-12  1.0701E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -21.208999   21.258227   -0.597496   -0.284704   -0.734211  2456982.729338
# Heliocentric elements and errors
Epoch:              2456980.5000  =  2014/11/19
Mean Anomaly:          318.81658 +/-     0.089
Argument of Peri:      327.38635 +/-     0.134
Long of Asc Node:      107.92766 +/-     0.002
Inclination:            20.83778 +/-     0.000
Eccentricity:         0.14147948 +/-    0.0003
Semi-Major Axis:     42.70192954 +/-    0.0071
Time of Perihelion: 2468640.2590 +/-      24.9
Perihelion:          36.66048268 +/-    0.0130
Aphelion:            48.74337640 +/-    0.0141
Period (y)              279.0483 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.40193372 +/-    0.0012
Ecliptic Y           13.63873568 +/-    0.0005
Ecliptic Z          -13.69404796 +/-    0.0005
Ecliptic XDOT        -0.00132587 +/-    0.0000
Ecliptic YDOT         0.00257223 +/-    0.0000
Ecliptic ZDOT         0.00017879 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.59055890 +/-    0.0011
Geocenter to KBO     37.85264646 +/-    0.0014
# Hcoef:  7.71

The following table shows the complete astrometric record for 16RK82. 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 (16RK82) followed by the observatory code and reference code for the source of the astrometry.

2014 11  21.22856  01 50 21.658  -11 23 19.37  23.6r 16RK82    W84  C~55Zp      
2015 11  07.24827  01 57 25.933  -10 42 59.51  23.2i 16RK82    W84  C~55Zp      
2015 11  07.24964  01 57 25.926  -10 42 59.42  23.6r 16RK82    W84  C~55Zp      
2016 09  07.29378  02 07 54.627  -09 32 37.33  23.6r 16RK82    W84  C~55Zp      
2016 10  28.19810  02 04 12.018  -10 01 04.85  23.4i 16RK82    W84  C~55Zp      
2016 10  28.19949  02 04 12.022  -10 01 04.77  24.0r 16RK82    W84  C~55Zp      
2017 10  13.30673  02 11 28.255  -09 14 33.21  22.7z 16RK82    W84  C~55Zp      
2017 10  16.24533  02 11 13.797  -09 16 01.47  23.8r 16RK82    W84  C~55Zp      
2017 10  18.28531  02 11 03.619  -09 17 00.56  22.7i 16RK82    W84  C~55Zp      
2017 10  18.28669  02 11 03.610  -09 17 00.63  24.0r 16RK82    W84  C~55Zp      
2017 11  01.19081  02 09 53.065  -09 22 38.43  22.9z 16RK82    W84  C~55Zp      
2017 11  27.15606  02 07 49.463  -09 27 06.70  23.7i 16RK82    W84  C~55Zp      
2018 11  17.15302  02 14 35.417  -08 46 12.27  23.0i 16RK82    W84  C~55Zp      
2018 11  28.19097  02 13 45.150  -08 47 05.40  23.5r 16RK82    W84  C~55Zp      

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    -0.06       0.00     0.04
     2   0.9610   6699.26     0.03    -141.88    -0.07
     3   0.9610   6699.20     0.07    -141.76     0.03
     4   1.7962  16928.72     0.14     154.92     0.12
     5   1.9356  13213.01    -0.10    -135.76    -0.07
     6   1.9356  13213.09     0.10    -135.71    -0.03
     7   2.8941  20289.27    -0.25     -88.71    -0.19
     8   2.9022  20055.54     0.06     -85.65     0.10
     9   2.9078  19892.25    -0.05     -80.72     0.02
    10   2.9078  19892.10    -0.09     -80.73     0.01
    11   2.9458  18789.55     0.01      19.13     0.00
    12   3.0169  16988.08     0.00     490.24     0.00
    13   3.9888  23544.55     0.12     383.80     0.05
    14   4.0191  22830.08     0.03     630.75     0.00

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.

16RK82    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        43.086    43.108    43.064
ecceobj         0.145     0.145     0.145
incobj         20.842    20.842    20.842
qmin           35.701    35.796    35.666
qmax           50.196    50.130    50.196
amean          42.765    42.799    42.757
amin           42.393    42.450    42.379
amax           43.176    43.194    43.169
emean           0.145     0.145     0.145
emin            0.129     0.129     0.130
emax            0.164     0.162     0.163
imean          19.086    19.092    19.089
imin           18.513    18.483    18.468
imax           19.730    19.736    19.726
excite_mean     0.358     0.358     0.358
fracstop        1.000     1.000     1.000
cjmean          2.934     2.934     2.933

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       172.9     173.0     173.7
kozaiamp        180.0     180.0     180.0