Orbit Fit and Astrometric record for 16RO82

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: 16RO82    
# Created Fri Dec  3 02:13:52 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     18 observations of     18
# Arc:   5.06y
# First observation: 2016/09/08
#  Last observation: 2021/09/30
# Chi-squared of fit:     4.62 DOF:     30 RMS:  0.09
# Min/Max residuals:    -0.32    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.580710E-05  2.648193E-02  4.760820E-06  7.924011E-03  2.588479E-02  6.745779E-05
# Covariance matrix:
  2.8787E-13 -7.2785E-15 -4.1716E-14  9.1479E-15  3.3505E-13  1.9012E-13
 -7.2785E-15  4.5847E-13 -9.8728E-14  1.4425E-13  4.7266E-13  3.3950E-12
 -4.1716E-14 -9.8728E-14  1.7155E-13 -6.7867E-14 -1.8089E-13 -7.5999E-13
  9.1479E-15  1.4425E-13 -6.7867E-14  6.8891E-14  1.5574E-13  1.1203E-12
  3.3505E-13  4.7266E-13 -1.8089E-13  1.5574E-13  1.1496E-12  3.6127E-12
  1.9012E-13  3.3950E-12 -7.5999E-13  1.1203E-12  3.6127E-12  2.6371E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -31.680538  -11.940152    0.034033   -0.530050   -0.859238  2457639.866779
# Heliocentric elements and errors
Epoch:              2457640.5000  =  2016/09/09
Mean Anomaly:            2.26205 +/-     0.067
Argument of Peri:      292.61777 +/-     0.089
Long of Asc Node:       47.73163 +/-     0.000
Inclination:            34.73346 +/-     0.000
Eccentricity:         0.13655343 +/-    0.0001
Semi-Major Axis:     45.73120725 +/-    0.0076
Time of Perihelion: 2456930.7309 +/-      21.1
Perihelion:          39.48645386 +/-    0.0082
Aphelion:            51.97596064 +/-    0.0100
Period (y)              309.2625 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.14202654 +/-    0.0013
Ecliptic Y           -7.04646765 +/-    0.0003
Ecliptic Z          -20.28910823 +/-    0.0008
Ecliptic XDOT         0.00101776 +/-    0.0000
Ecliptic YDOT         0.00264116 +/-    0.0000
Ecliptic ZDOT         0.00070946 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.49296418 +/-    0.0012
Geocenter to KBO     38.63275528 +/-    0.0016
# Hcoef:  6.40

The following table shows the complete astrometric record for 16RO82. 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 (16RO82) followed by the observatory code and reference code for the source of the astrometry.

2016 09  08.36599  00 13 01.573  -33 29 45.59  22.3i 16RO82    W84  C~55Zp      
2016 09  08.36736  00 13 01.564  -33 29 45.62  22.5r 16RO82    W84  C~55Zp      
2016 09  08.36872  00 13 01.550  -33 29 45.77  22.5g 16RO82    W84  C~55Zp      
2016 09  09.13031  00 12 57.356  -33 30 10.35  22.1z 16RO82    W84  C~55Zp      
2016 10  08.04986  00 10 10.970  -33 39 46.34  22.2z 16RO82    W84  C~55Zp      
2016 10  09.07961  00 10 05.150  -33 39 52.35  22.3i 16RO82    W84  C~55Zp      
2016 10  22.13710  00 08 54.700  -33 39 35.19  22.9g 16RO82    W84  C~55Zp      
2016 11  18.02468  00 07 03.281  -33 29 44.87  22.3i 16RO82    W84  C~55Zp      
2017 10  11.27718  00 15 16.473  -32 33 44.32  21.9z 16RO82    W84  C~55Zp      
2017 10  22.11058  00 14 18.259  -32 33 39.82  22.3i 16RO82    W84  C~55Zp      
2017 10  27.24281  00 13 52.601  -32 32 55.20  22.3r 16RO82    W84  C~55Zp      
2017 10  27.24419  00 13 52.598  -32 32 55.17  23.3g 16RO82    W84  C~55Zp      
2018 11  27.10923  00 17 12.381  -31 13 32.77  22.5r 16RO82    W84  C~55Zp      
2018 11  27.11061  00 17 12.381  -31 13 32.69  23.0g 16RO82    W84  C~55Zp      
2021 09  30.369047 00 36 34.756  -27 57 37.59  22.3w 16RO82    F52  C~55Zp      
2021 09  30.379855 00 36 34.687  -27 57 37.67  22.5w 16RO82    F52  C~55Zp      
2021 09  30.390631 00 36 34.597  -27 57 38.06  22.4w 16RO82    F52  C~55Zp      
2021 09  30.401448 00 36 34.552  -27 57 38.25  22.4w 16RO82    F52  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     0.07       0.00     0.05
     2   0.0000      0.00     0.05       0.00     0.06
     3   0.0000      0.00    -0.04       0.00    -0.04
     4   0.0021      0.00    -0.09       0.00    -0.03
     5   0.0813      0.00    -0.03       0.00    -0.00
     6   0.0841      0.00     0.07       0.00     0.06
     7   0.1198      0.00     0.11       0.00    -0.12
     8   0.1935      0.00    -0.06       0.00     0.00
     9   1.0894      0.00     0.02       0.00     0.10
    10   1.1191      0.00     0.01       0.00     0.00
    11   1.1331      0.00    -0.05       0.00    -0.03
    12   1.1331      0.00     0.01       0.00    -0.01
    13   2.2170      0.00    -0.01       0.00    -0.04
    14   2.2170      0.00     0.04       0.00    -0.01
    15   5.0596      0.00     0.24       0.00    -0.04
    16   5.0596      0.00     0.12       0.00     0.11
    17   5.0596      0.00    -0.32       0.00    -0.06
    18   5.0596      0.00    -0.08       0.00    -0.03

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.

16RO82    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        46.073    46.073    46.073
ecceobj         0.143     0.143     0.143
incobj         34.702    34.702    34.702
qmin           38.938    38.936    38.944
qmax           53.281    53.258    53.297
amean          45.961    45.961    45.961
amin           45.591    45.581    45.586
amax           46.368    46.373    46.368
emean           0.135     0.135     0.135
emin            0.122     0.122     0.122
emax            0.149     0.149     0.150
imean          33.908    33.908    33.908
imin           33.637    33.639    33.646
imax           34.187    34.189    34.194
excite_mean     0.574     0.574     0.574
fracstop        1.000     1.000     1.000
cjmean          2.687     2.687     2.687

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       170.1     170.2     170.0
kozaiamp        180.0     180.0     179.9