Orbit Fit and Astrometric record for 16RF82

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: 16RF82    
# Created Fri Dec  3 02:13:52 2021
# Orbit generated from Bernstein formalism
# Fitting     18 observations of     18
# Arc:   4.16y
# First observation: 2014/09/30
#  Last observation: 2018/11/28
Preliminary a, adot, b, bdot, g, gdot:
  -0.000272   0.029684   0.000064  -0.012884   0.027728   0.000000
# Chi-squared of fit:     8.90 DOF:     30 RMS:  0.12
# Min/Max residuals:    -0.36    0.35
# Exact a, adot, b, bdot, g, gdot:
  1.800962E-05  2.915300E-02 -7.149127E-06 -1.261718E-02  2.673697E-02 -6.031236E-03
# Covariance matrix:
  6.1139E-13 -4.8108E-13 -8.9705E-14  1.4257E-13 -8.7322E-14 -3.0457E-12
 -4.8108E-13  6.0506E-13  1.4261E-13 -2.2626E-13  1.3374E-13  4.8398E-12
 -8.9705E-14  1.4261E-13  4.3352E-13 -1.9686E-13  1.2569E-14  1.2863E-12
  1.4257E-13 -2.2626E-13 -1.9686E-13  1.5462E-13 -6.6682E-14 -2.0012E-12
 -8.7322E-14  1.3374E-13  1.2569E-14 -6.6682E-14  6.1491E-13  6.9489E-13
 -3.0457E-12  4.8398E-12  1.2863E-12 -2.0012E-12  6.9489E-13  4.3426E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -33.852564  -18.554863   -0.427238   -0.505917   -0.754510  2456930.666718
# Heliocentric elements and errors
Epoch:              2456930.5000  =  2014/09/30
Mean Anomaly:          347.44064 +/-     0.012
Argument of Peri:      274.07310 +/-     0.034
Long of Asc Node:      109.89436 +/-     0.001
Inclination:            39.47073 +/-     0.000
Eccentricity:         0.44256280 +/-    0.0002
Semi-Major Axis:     64.68250616 +/-    0.0160
Time of Perihelion: 2463559.4363 +/-       5.6
Perihelion:          36.05643525 +/-    0.0136
Aphelion:            93.30857707 +/-    0.0252
Period (y)              520.2217 +/-      0.19
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.44110263 +/-    0.0009
Ecliptic Y           -9.76600397 +/-    0.0003
Ecliptic Z          -20.83498621 +/-    0.0006
Ecliptic XDOT        -0.00022321 +/-    0.0000
Ecliptic YDOT         0.00321768 +/-    0.0000
Ecliptic ZDOT        -0.00072882 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.15930048 +/-    0.0008
Geocenter to KBO     37.40139501 +/-    0.0011
# Hcoef:  7.79

The following table shows the complete astrometric record for 16RF82. 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 (16RF82) followed by the observatory code and reference code for the source of the astrometry.

2014 09  30.16594  23 53 55.475  -38 02 23.60  24.0g 16RF82    W84  C~55Zo      
2014 09  30.16730  23 53 55.473  -38 02 23.49  23.8i 16RF82    W84  C~55Zo      
2015 11  06.06192  00 00 03.758  -37 51 06.53  23.8r 16RF82    W84  C~55Zo      
2015 11  06.06328  00 00 03.747  -37 51 06.21  24.4g 16RF82    W84  C~55Zo      
2016 09  08.34095  00 14 28.204  -37 25 19.90  23.4r 16RF82    W84  C~55Zo      
2016 09  08.34232  00 14 28.207  -37 25 20.12  22.8i 16RF82    W84  C~55Zo      
2016 09  08.34368  00 14 28.183  -37 25 20.04  23.5g 16RF82    W84  C~55Zo      
2016 10  07.01323  00 11 42.715  -37 39 24.89  23.5i 16RF82    W84  C~55Zo      
2016 10  21.10272  00 10 25.546  -37 40 51.33  23.4r 16RF82    W84  C~55Zo      
2017 01  21.05892  00 09 35.874  -36 32 43.48  23.2i 16RF82    W84  C~55Zo      
2017 09  27.33448  00 21 59.195  -37 19 04.38  23.3r 16RF82    W84  C~55Zo      
2017 09  27.33585  00 21 59.186  -37 19 04.34  23.6i 16RF82    W84  C~55Zo      
2017 09  27.33721  00 21 59.173  -37 19 04.39  24.2g 16RF82    W84  C~55Zo      
2017 10  22.12074  00 19 38.206  -37 24 33.15  24.3g 16RF82    W84  C~55Zo      
2017 10  22.25568  00 19 37.495  -37 24 33.04  23.5r 16RF82    W84  C~55Zo      
2017 10  27.21765  00 19 12.144  -37 24 11.35  23.2z 16RF82    W84  C~55Zo      
2018 11  15.07178  00 27 07.094  -36 59 57.55  23.4i 16RF82    W84  C~55Zo      
2018 11  28.08152  00 26 27.862  -36 52 30.63  24.3g 16RF82    W84  C~55Zo      

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    -0.16       0.00    -0.06
     2   0.0000      0.03    -0.03       0.11     0.02
     3   1.1003   4136.88     0.11   -1525.82    -0.20
     4   1.1003   4136.92     0.20   -1525.48     0.08
     5   1.9416  13781.13    -0.01   -5439.58     0.02
     6   1.9416  13781.05     0.01   -5439.78    -0.19
     7   1.9416  13780.84    -0.08   -5439.57     0.03
     8   2.0201  11652.59     0.04   -5127.48     0.12
     9   2.0587  10821.39     0.35   -4724.85     0.15
    10   2.3105  12425.38    -0.36    -910.31     0.23
    11   2.9929  18560.11    -0.01   -8013.87    -0.08
    12   2.9929  18560.04     0.02   -8013.78    -0.01
    13   2.9929  18559.88    -0.03   -8013.74     0.01
    14   3.0608  16954.33    -0.09   -7376.09     0.07
    15   3.0612  16947.19    -0.03   -7371.41    -0.09
    16   3.0747  16702.09     0.01   -7189.60    -0.03
    17   4.1257  22308.27     0.04   -9089.81    -0.01
    18   4.1613  22160.70     0.01   -8452.09    -0.06

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.

16RF82    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        65.597    65.639    65.555
ecceobj         0.450     0.450     0.450
incobj         39.457    39.457    39.457
qmin           35.523    35.497    34.730
qmax           95.894    95.984    96.323
amean          64.943    65.019    64.922
amin           64.209    64.267    64.176
amax           66.020    66.036    66.014
emean           0.429     0.434     0.440
emin            0.408     0.413     0.424
emax            0.452     0.454     0.463
imean          38.443    38.245    37.996
imin           37.701    37.692    37.211
imax           39.172    39.037    38.553
excite_mean     0.755     0.756     0.757
fracstop        1.000     1.000     1.000
cjmean          2.542     2.542     2.542

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       163.8     167.8     179.7
kozaiamp        180.0     180.0     180.0