Orbit Fit and Astrometric record for 16RP82

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: 16RP82    
# Created Sat Dec  4 02:13:54 2021
# Orbit generated from Bernstein formalism
# Fitting     18 observations of     18
# Arc:   2.21y
# First observation: 2016/09/09
#  Last observation: 2018/11/26
Preliminary a, adot, b, bdot, g, gdot:
   0.000093   0.030993   0.000016   0.010573   0.028753   0.000000
# Chi-squared of fit:     2.99 DOF:     30 RMS:  0.07
# Min/Max residuals:    -0.19    0.12
# Exact a, adot, b, bdot, g, gdot:
  1.706106E-05  3.106506E-02  6.221536E-06  1.063168E-02  2.865024E-02 -6.011505E-04
# Covariance matrix:
  3.6284E-13 -1.1628E-13  8.9003E-15 -4.3581E-14  3.7588E-13 -1.7491E-12
 -1.1628E-13  1.0462E-12 -1.0181E-13  4.0038E-13  7.2802E-13  1.7585E-11
  8.9003E-15 -1.0181E-13  2.2846E-13 -1.8535E-13 -5.4210E-14 -2.1360E-12
 -4.3581E-14  4.0038E-13 -1.8535E-13  3.3413E-13  1.9209E-13  8.5257E-12
  3.7588E-13  7.2802E-13 -5.4210E-14  1.9209E-13  1.4690E-12  8.8428E-12
 -1.7491E-12  1.7585E-11 -2.1360E-12  8.5257E-12  8.8428E-12  3.7204E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -6.177774   -0.921393    0.213286   -0.106068   -0.981518  2457640.651629
# Heliocentric elements and errors
Epoch:              2457640.5000  =  2016/09/09
Mean Anomaly:          354.60518 +/-     0.139
Argument of Peri:      350.07724 +/-     0.209
Long of Asc Node:       15.72677 +/-     0.001
Inclination:            19.80375 +/-     0.001
Eccentricity:         0.19053644 +/-    0.0001
Semi-Major Axis:     44.25838660 +/-    0.0084
Time of Perihelion: 2459252.1324 +/-      41.7
Perihelion:          35.82555125 +/-    0.0093
Aphelion:            52.69122195 +/-    0.0119
Period (y)              294.4432 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.67661472 +/-    0.0015
Ecliptic Y           -0.78971691 +/-    0.0000
Ecliptic Z           -3.75591386 +/-    0.0002
Ecliptic XDOT         0.00010163 +/-    0.0000
Ecliptic YDOT         0.00296047 +/-    0.0000
Ecliptic ZDOT         0.00101623 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.88246619 +/-    0.0015
Geocenter to KBO     34.90371785 +/-    0.0015
# Hcoef:  7.38

The following table shows the complete astrometric record for 16RP82. 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 (16RP82) followed by the observatory code and reference code for the source of the astrometry.

2016 09  09.15084  00 06 29.135  -06 01 57.09  22.3i 16RP82    W84  C~55Zp      
2016 09  09.15220  00 06 29.121  -06 01 56.99  22.5z 16RP82    W84  C~55Zp      
2016 10  05.15829  00 04 12.250  -06 13 49.53  22.9r 16RP82    W84  C~55Zp      
2016 10  05.15967  00 04 12.235  -06 13 49.69  22.9i 16RP82    W84  C~55Zp      
2016 10  05.16105  00 04 12.221  -06 13 49.88  24.3g 16RP82    W84  C~55Zp      
2016 11  05.06936  00 01 50.935  -06 22 47.47  22.6z 16RP82    W84  C~55Zp      
2017 09  27.28723  00 10 28.986  -04 54 06.76  23.1r 16RP82    W84  C~55Zp      
2017 09  27.28860  00 10 28.974  -04 54 06.80  22.3i 16RP82    W84  C~55Zp      
2017 09  27.28997  00 10 28.961  -04 54 06.73  23.9g 16RP82    W84  C~55Zp      
2017 10  13.23886  00 09 05.857  -05 00 45.33  22.6i 16RP82    W84  C~55Zp      
2017 10  13.24022  00 09 05.853  -05 00 45.27  23.0r 16RP82    W84  C~55Zp      
2017 10  28.14891  00 07 55.698  -05 05 29.32  22.2z 16RP82    W84  C~55Zp      
2017 11  09.06704  00 07 09.035  -05 07 51.50  22.6r 16RP82    W84  C~55Zp      
2017 11  09.06841  00 07 09.035  -05 07 51.40  23.4g 16RP82    W84  C~55Zp      
2018 10  18.17681  00 14 15.445  -03 46 07.16  22.3z 16RP82    W84  C~55Zp      
2018 10  18.17817  00 14 15.431  -03 46 07.20  22.7i 16RP82    W84  C~55Zp      
2018 11  07.12755  00 12 47.869  -03 51 41.17  22.8r 16RP82    W84  C~55Zp      
2018 11  26.08382  00 11 51.330  -03 53 24.23  23.4g 16RP82    W84  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     0.02       0.00    -0.07
     2   0.0000     -0.15    -0.02       0.18     0.10
     3   0.0712  -2156.24     0.12     162.37     0.05
     4   0.0712  -2156.51    -0.03     162.32    -0.02
     5   0.0712  -2156.78    -0.19     162.23    -0.13
     6   0.1558  -4303.57     0.08     508.56     0.12
     7   1.0490   4913.44     0.07    2294.61    -0.04
     8   1.0490   4913.26     0.00    2294.64    -0.01
     9   1.0490   4913.11    -0.03    2294.79     0.12
    10   1.0926   3615.00     0.00    2427.82    -0.08
    11   1.0926   3614.97     0.08    2427.90    -0.01
    12   1.1335   2540.44    -0.09    2587.65    -0.13
    13   1.1661   1844.54    -0.04    2736.46     0.00
    14   1.1661   1844.58     0.08    2736.55     0.07
    15   2.1055   9662.51     0.07    4671.86    -0.00
    16   2.1055   9662.31    -0.04    4671.91     0.03
    17   2.1601   8325.39    -0.04    4893.11    -0.04
    18   2.2120   7507.85    -0.01    5138.80     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.

16RP82    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        44.720    44.746    44.693
ecceobj         0.199     0.200     0.199
incobj         19.724    19.724    19.723
qmin           34.933    35.328    34.028
qmax           54.764    54.327    55.662
amean          44.529    44.554    44.558
amin           44.065    44.102    44.060
amax           45.075    45.050    45.117
emean           0.189     0.187     0.210
emin            0.164     0.169     0.187
emax            0.216     0.206     0.236
imean          19.585    19.702    19.068
imin           18.683    19.068    17.890
imax           20.442    20.214    19.964
excite_mean     0.385     0.386     0.388
fracstop        1.000     1.000     1.000
cjmean          2.926     2.925     2.924

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       168.0     168.8     173.8
kozaiamp        180.0     180.0     180.0