Orbit Fit and Astrometric record for 16RT82

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: 16RT82    
# Created Thu Dec  9 02:13:52 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     20 observations of     20
# Arc:   5.15y
# First observation: 2016/09/11
#  Last observation: 2021/11/05
# Chi-squared of fit:     5.12 DOF:     34 RMS:  0.09
# Min/Max residuals:    -0.20    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.685444E-05  2.852456E-02  6.538291E-06  1.064655E-02  2.735861E-02 -3.904885E-03
# Covariance matrix:
  4.2065E-13 -3.1674E-13  9.5332E-14 -1.2181E-13  1.1366E-13 -2.0069E-12
 -3.1674E-13  3.9496E-13 -1.2274E-13  1.5637E-13  1.0196E-13  2.5680E-12
  9.5332E-14 -1.2274E-13  2.1029E-13 -1.0681E-13 -1.3801E-14 -8.7977E-13
 -1.2181E-13  1.5637E-13 -1.0681E-13  9.7884E-14  1.6486E-14  1.1217E-12
  1.1366E-13  1.0196E-13 -1.3801E-14  1.6486E-14  5.9042E-13  2.5167E-13
 -2.0069E-12  2.5680E-12 -8.7977E-13  1.1217E-12  2.5167E-13  1.8437E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.411403    0.753501    0.207271   -0.024156   -0.987784  2457642.732649
# Heliocentric elements and errors
Epoch:              2457642.5000  =  2016/09/11
Mean Anomaly:          333.39539 +/-     0.023
Argument of Peri:       38.42469 +/-     0.039
Long of Asc Node:        4.09799 +/-     0.000
Inclination:            20.56891 +/-     0.000
Eccentricity:         0.23141009 +/-    0.0001
Semi-Major Axis:     46.44411269 +/-    0.0067
Time of Perihelion: 2466186.2555 +/-      24.1
Perihelion:          35.69647651 +/-    0.0072
Aphelion:            57.19174887 +/-    0.0096
Period (y)              316.5222 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           37.52440565 +/-    0.0010
Ecliptic Y            0.28371294 +/-    0.0000
Ecliptic Z           -0.90008850 +/-    0.0000
Ecliptic XDOT        -0.00040022 +/-    0.0000
Ecliptic YDOT         0.00284257 +/-    0.0000
Ecliptic ZDOT         0.00107470 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.53635647 +/-    0.0010
Geocenter to KBO     36.55168123 +/-    0.0010
# Hcoef:  7.06

The following table shows the complete astrometric record for 16RT82. 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 (16RT82) followed by the observatory code and reference code for the source of the astrometry.

2016 09  11.23186  00 05 00.660  -00 59 42.83  22.2i 16RT82    W84  C~55Zp      
2016 09  22.10524  00 04 05.877  -01 04 30.63  21.9r 16RT82    W84  C~55Zp      
2016 09  22.10663  00 04 05.864  -01 04 30.49  22.4g 16RT82    W84  C~55Zp      
2017 08  18.29814  00 11 50.582  +00 22 21.20  23.4g 16RT82    W84  C~55Zp      
2017 09  27.16352  00 08 43.253  +00 06 10.41  22.2z 16RT82    W84  C~55Zp      
2017 10  11.20286  00 07 32.604  +00 00 07.64  22.8i 16RT82    W84  C~55Zp      
2017 10  17.18782  00 07 03.901  -00 02 16.31  21.8r 16RT82    W84  C~55Zp      
2017 10  19.15604  00 06 54.776  -00 03 01.36  23.3g 16RT82    W84  C~55Zp      
2017 10  28.15721  00 06 15.332  -00 06 12.63  23.1i 16RT82    W84  C~55Zp      
2017 11  08.08519  00 05 33.931  -00 09 20.64  23.8g 16RT82    W84  C~55Zp      
2017 11  09.05597  00 05 30.657  -00 09 34.80  22.9r 16RT82    W84  C~55Zp      
2017 11  09.05735  00 05 30.658  -00 09 34.92  23.9g 16RT82    W84  C~55Zp      
2018 09  10.20572  00 15 14.750  +01 27 04.72  22.8i 16RT82    W84  C~55Zp      
2018 09  17.29376  00 14 39.521  +01 24 03.01  22.7i 16RT82    W84  C~55Zp      
2018 09  17.29517  00 14 39.511  +01 24 03.00  22.7r 16RT82    W84  C~55Zp      
2018 09  17.29655  00 14 39.510  +01 24 02.99  23.3g 16RT82    W84  C~55Zp      
2018 10  01.24714  00 13 28.163  +01 17 53.16  21.8z 16RT82    W84  C~55Zp      
2021 11  05.120390 00 26 11.332  +04 46 27.81  22.9G 16RT82    G37  C~5Bd5      
2021 11  05.170130 00 26 11.126  +04 46 26.52        16RT82    G37  C~5Bd5      
2021 11  05.218800 00 26 10.919  +04 46 25.55        16RT82    G37  C~5Bd5      

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    -0.10
     2   0.0298      0.00     0.12       0.00    -0.02
     3   0.0298      0.00     0.03       0.00     0.16
     4   0.9338      0.00    -0.13       0.00    -0.03
     5   1.0429      0.00     0.15       0.00    -0.12
     6   1.0814      0.00     0.12       0.00    -0.09
     7   1.0978      0.00    -0.20       0.00    -0.02
     8   1.1031      0.00    -0.01       0.00     0.23
     9   1.1278      0.00    -0.02       0.00    -0.02
    10   1.1577      0.00    -0.04       0.00     0.09
    11   1.1604      0.00    -0.03       0.00    -0.04
    12   1.1604      0.00     0.06       0.00    -0.14
    13   1.9958      0.00    -0.01       0.00     0.05
    14   2.0152      0.00     0.03       0.00    -0.01
    15   2.0152      0.00    -0.01       0.00     0.02
    16   2.0152      0.00     0.08       0.00     0.04
    17   2.0534      0.00    -0.01       0.00     0.08
    18   5.1496      0.00     0.02       0.00     0.12
    19   5.1497      0.00     0.02       0.00    -0.11
    20   5.1499      0.00    -0.06       0.00    -0.05

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.

16RT82    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        46.992    46.992    46.992
ecceobj         0.240     0.240     0.240
incobj         20.475    20.475    20.475
qmin           34.807    34.832    34.777
qmax           59.042    59.016    59.007
amean          46.647    46.646    46.654
amin           46.220    46.219    46.238
amax           47.178    47.165    47.197
emean           0.235     0.234     0.236
emin            0.218     0.217     0.219
emax            0.252     0.252     0.253
imean          20.666    20.681    20.622
imin           20.040    20.055    20.022
imax           21.202    21.277    21.145
excite_mean     0.424     0.424     0.424
fracstop        1.000     1.000     1.000
cjmean          2.909     2.909     2.909

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       171.1     170.8     172.4
kozaiamp        180.0     180.0     179.9