Orbit Fit and Astrometric record for 16RW82

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: 16RW82    
# Created Sat Dec  4 02:13:54 2021
# Orbit generated from Bernstein formalism
# Fitting     20 observations of     20
# Arc:   4.16y
# First observation: 2014/08/29
#  Last observation: 2018/10/27
Preliminary a, adot, b, bdot, g, gdot:
   0.000007   0.024132   0.000049  -0.002681   0.024930   0.000000
# Chi-squared of fit:     6.98 DOF:     34 RMS:  0.10
# Min/Max residuals:    -0.21    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.643912E-05  2.387410E-02 -9.764256E-07 -2.544364E-03  2.362479E-02 -5.459216E-03
# Covariance matrix:
  8.9847E-13 -7.4619E-13  2.6310E-15  1.1185E-14 -2.9980E-14 -6.1328E-12
 -7.4619E-13  9.3194E-13  3.6439E-14 -1.2155E-13  1.1622E-12  7.8052E-12
  2.6310E-15  3.6439E-14  3.7328E-13 -1.6210E-13  2.5642E-13  1.5535E-13
  1.1185E-14 -1.2155E-13 -1.6210E-13  1.3324E-13 -7.0847E-13 -6.4033E-13
 -2.9980E-14  1.1622E-12  2.5642E-13 -7.0847E-13  7.3406E-12  5.6518E-12
 -6.1328E-12  7.8052E-12  1.5535E-13 -6.4033E-13  5.6518E-12  7.4249E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -28.185667  -64.434735   -0.649269   -0.367003   -0.685118  2456898.567468
# Heliocentric elements and errors
Epoch:              2456890.5000  =  2014/08/21
Mean Anomaly:          322.76794 +/-     0.046
Argument of Peri:      321.67743 +/-     0.068
Long of Asc Node:       38.23145 +/-     0.002
Inclination:            28.19191 +/-     0.000
Eccentricity:         0.27133430 +/-    0.0004
Semi-Major Axis:     52.34942986 +/-    0.0324
Time of Perihelion: 2471198.5672 +/-      11.7
Perihelion:          38.14523415 +/-    0.0332
Aphelion:            66.55362557 +/-    0.0473
Period (y)              378.7705 +/-      0.35
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           17.01980236 +/-    0.0018
Ecliptic Y          -34.07557760 +/-    0.0039
Ecliptic Z          -19.99302871 +/-    0.0023
Ecliptic XDOT         0.00219029 +/-    0.0000
Ecliptic YDOT         0.00181827 +/-    0.0000
Ecliptic ZDOT         0.00003904 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.01790160 +/-    0.0033
Geocenter to KBO     42.32842723 +/-    0.0049
# Hcoef:  6.55

The following table shows the complete astrometric record for 16RW82. 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 (16RW82) followed by the observatory code and reference code for the source of the astrometry.

2014 08  29.06669  20 20 18.952  -48 33 32.29  22.9i 16RW82    W84  C~55Zq      
2015 09  12.01228  20 27 22.473  -48 16 20.72  22.4r 16RW82    W84  C~55Zq      
2015 09  12.01363  20 27 22.479  -48 16 20.72  24.1g 16RW82    W84  C~55Zq      
2015 09  13.019653 20 27 18.12   -48 16 01.5   22.4i 16RW82    W84  C~55Zq      
2015 09  13.021030 20 27 18.08   -48 16 01.4   22.8r 16RW82    W84  C~55Zq      
2015 09  13.022396 20 27 18.09   -48 16 01.3   23.1g 16RW82    W84  C~55Zq      
2016 09  07.032442 20 35 53.35   -48 01 26.1   22.2i 16RW82    W84  C~55Zq      
2016 09  07.98901  20 35 48.671  -48 01 11.87  22.1z 16RW82    W84  C~55Zq      
2016 09  09.026713 20 35 43.64   -48 00 55.8   22.4z 16RW82    W84  C~55Zq      
2016 09  22.992755 20 34 46.72   -47 56 03.2   22.8i 16RW82    W84  C~55Zq      
2016 09  22.995521 20 34 46.71   -47 56 03.1   22.8r 16RW82    W84  C~55Zq      
2016 09  24.026076 20 34 43.31   -47 55 36.2   23.3g 16RW82    W84  C~55Zq      
2016 10  02.010012 20 34 21.52   -47 51 45.0   22.7r 16RW82    W84  C~55Zq      
2016 10  02.011389 20 34 21.52   -47 51 45.1   23.5g 16RW82    W84  C~55Zq      
2017 09  14.07632  20 43 32.261  -47 41 09.09  23.2r 16RW82    W84  C~55Zq      
2017 09  14.07770  20 43 32.240  -47 41 09.00  22.8i 16RW82    W84  C~55Zq      
2017 10  16.00457  20 42 06.170  -47 25 49.01  22.8i 16RW82    W84  C~55Zq      
2017 10  16.07950  20 42 06.117  -47 25 46.30  23.2r 16RW82    W84  C~55Zq      
2018 10  27.02012  20 50 06.601  -46 58 21.74  22.9r 16RW82    W84  C~55Zq      
2018 10  27.02149  20 50 06.611  -46 58 21.48  23.8g 16RW82    W84  C~55Zq      

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    -0.15
     2   1.0375   4338.88     0.03    -147.40     0.11
     3   1.0375   4338.94     0.14    -147.41     0.05
     4   1.0403   4302.57     0.15    -116.71    -0.17
     5   1.0403   4302.21    -0.15    -116.51    -0.00
     6   1.0403   4302.34     0.02    -116.44     0.02
     7   2.0259   9494.21     0.04    -800.50     0.16
     8   2.0285   9453.84     0.22    -772.47     0.12
     9   2.0314   9410.66    -0.00    -741.62     0.11
    10   2.0696   8955.11     0.06    -287.67    -0.04
    11   2.0696   8955.04     0.06    -287.54    -0.01
    12   2.0724   8930.64    -0.21    -251.48     0.09
    13   2.0943   8791.81    -0.09      35.63     0.07
    14   2.0943   8791.78    -0.11      35.54    -0.07
    15   3.0445  14275.85     0.06   -1125.60    -0.10
    16   3.0445  14275.68    -0.06   -1125.45     0.01
    17   3.1319  13753.30    -0.07      32.78    -0.03
    18   3.1321  13753.68    -0.05      35.53    -0.21
    19   4.1614  18950.58    -0.05     -77.84    -0.06
    20   4.1614  18950.76     0.12     -77.64     0.09

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.

16RW82    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        52.600    52.689    52.510
ecceobj         0.276     0.277     0.275
incobj         28.236    28.236    28.236
qmin           36.964    36.664    37.043
qmax           69.110    69.667    68.762
amean          52.696    52.805    52.582
amin           52.186    52.272    52.058
amax           53.321    53.437    53.195
emean           0.277     0.283     0.276
emin            0.260     0.261     0.259
emax            0.297     0.304     0.294
imean          27.497    27.285    27.510
imin           27.039    26.786    27.081
imax           28.045    28.013    28.002
excite_mean     0.538     0.539     0.538
fracstop        1.000     1.000     1.000
cjmean          2.826     2.827     2.825

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       163.6     176.9     162.9
kozaiamp        179.9     179.9     180.0