Orbit Fit and Astrometric record for 16RD82

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: 16RD82    
# Created Sat Dec  4 02:13:54 2021
# Orbit generated from Bernstein formalism
# Fitting     10 observations of     10
# Arc:   4.28y
# First observation: 2014/08/19
#  Last observation: 2018/11/29
Preliminary a, adot, b, bdot, g, gdot:
   0.000372   0.028085   0.000058   0.001233   0.026726   0.000000
# Chi-squared of fit:     4.64 DOF:     14 RMS:  0.12
# Min/Max residuals:    -0.28    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.690228E-05  2.801359E-02  4.575496E-07  1.288497E-03  2.611205E-02 -5.659851E-04
# Covariance matrix:
  1.4405E-12 -1.1008E-12  7.9635E-14 -6.8606E-14 -4.1334E-13 -7.6329E-12
 -1.1008E-12  1.6420E-12 -1.0970E-13  9.2954E-14  1.2486E-12  1.2954E-11
  7.9635E-14 -1.0970E-13  9.1254E-13 -2.9384E-13 -3.8317E-14 -1.0745E-12
 -6.8606E-14  9.2954E-14 -2.9384E-13  1.1563E-13  2.9773E-14  9.1845E-13
 -4.1334E-13  1.2486E-12 -3.8317E-14  2.9773E-14  1.6177E-12  8.7680E-12
 -7.6329E-12  1.2954E-11 -1.0745E-12  9.1845E-13  8.7680E-12  1.1445E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -25.542629   -5.199670    0.488152   -0.383502   -0.802782  2456888.802848
# Heliocentric elements and errors
Epoch:              2456880.5000  =  2014/08/11
Mean Anomaly:          348.44786 +/-     0.124
Argument of Peri:      290.37667 +/-     0.169
Long of Asc Node:       78.62110 +/-     0.002
Inclination:            25.07733 +/-     0.000
Eccentricity:         0.14315229 +/-    0.0002
Semi-Major Axis:     45.42714399 +/-    0.0079
Time of Perihelion: 2460469.1543 +/-      38.6
Perihelion:          38.92414439 +/-    0.0098
Aphelion:            51.93014358 +/-    0.0114
Period (y)              306.1832 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.25099328 +/-    0.0017
Ecliptic Y           -3.69610883 +/-    0.0001
Ecliptic Z          -16.51276700 +/-    0.0008
Ecliptic XDOT         0.00026599 +/-    0.0000
Ecliptic YDOT         0.00292042 +/-    0.0000
Ecliptic ZDOT         0.00014760 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.10198488 +/-    0.0016
Geocenter to KBO     38.29649885 +/-    0.0019
# Hcoef:  7.73

The following table shows the complete astrometric record for 16RD82. 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 (16RD82) followed by the observatory code and reference code for the source of the astrometry.

2014 08  19.30207  00 24 31.037  -25 20 55.79  23.5r 16RD82    W84  C~52Zj      
2016 09  08.31542  00 35 25.465  -24 01 07.79  23.1z 16RD82    W84  C~52Zj      
2016 11  05.07556  00 30 40.354  -24 18 59.27  23.9r 16RD82    W84  C~52Zj      
2016 11  06.21596  00 30 35.708  -24 18 51.43  24.5g 16RD82    W84  C~52Zj      
2016 11  19.15352  00 29 49.629  -24 16 00.29  23.9r 16RD82    W84  C~52Zj      
2017 09  25.31342  00 40 08.638  -23 22 17.78  23.4r 16RD82    W84  C~52Zj      
2017 09  27.30157  00 39 58.383  -23 23 15.55  23.0r 16RD82    W84  C~52Zj      
2017 09  27.30295  00 39 58.359  -23 23 15.76  23.1i 16RD82    W84  C~52Zj      
2018 11  29.06864  00 41 27.009  -22 37 28.15  23.8r 16RD82    W84  C~52Zj      
2018 11  29.07003  00 41 27.001  -22 37 27.93  24.6g 16RD82    W84  C~52Zj      

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     0.01       0.00     0.07
     2   2.0562  10126.82    -0.18     292.46     0.04
     3   2.2143   6156.03     0.03    1102.04    -0.06
     4   2.2174   6102.74     0.18    1137.54     0.07
     5   2.2528   5615.66    -0.18    1572.77    -0.28
     6   3.1020  14668.65     0.06     573.91     0.11
     7   3.1075  14516.00     0.24     588.15     0.03
     8   3.1075  14515.60    -0.05     588.12    -0.01
     9   4.2786  16889.42    -0.07    2459.84    -0.08
    10   4.2786  16889.43    -0.04    2460.09     0.11

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.

16RD82    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        45.825    45.847    45.803
ecceobj         0.151     0.151     0.150
incobj         25.092    25.092    25.092
qmin           38.381    38.391    38.363
qmax           53.164    53.250    53.093
amean          45.609    45.643    45.588
amin           45.236    45.262    45.227
amax           46.033    46.066    46.001
emean           0.141     0.142     0.141
emin            0.128     0.129     0.128
emax            0.156     0.157     0.155
imean          23.654    23.655    23.654
imin           23.345    23.348    23.337
imax           24.022    24.006    24.013
excite_mean     0.425     0.426     0.425
fracstop        1.000     1.000     1.000
cjmean          2.893     2.893     2.893

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       173.7     173.7     173.8
kozaiamp        179.9     180.0     180.0