Orbit Fit and Astrometric record for 16RL82

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: 16RL82    
# Created Tue Nov 30 02:13:58 2021
# Orbit generated from Bernstein formalism
# Fitting     11 observations of     11
# Arc:   3.86y
# First observation: 2015/01/19
#  Last observation: 2018/11/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000711   0.029865  -0.000135   0.010006   0.027513   0.000000
# Chi-squared of fit:     4.08 DOF:     16 RMS:  0.11
# Min/Max residuals:    -0.19    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.712827E-05  2.854139E-02  6.022990E-06  9.571545E-03  2.633284E-02 -4.536757E-03
# Covariance matrix:
  1.4058E-12 -8.4825E-13  9.1169E-14 -1.6392E-13 -3.6533E-13 -4.2082E-12
 -8.4825E-13  8.3735E-13 -1.2215E-13  1.9246E-13  2.5474E-13  5.1132E-12
  9.1169E-14 -1.2215E-13  9.4312E-13 -3.2598E-13 -3.8045E-14 -8.4818E-13
 -1.6392E-13  1.9246E-13 -3.2598E-13  1.6428E-13  1.1606E-13  1.4415E-12
 -3.6533E-13  2.5474E-13 -3.8045E-14  1.1606E-13  5.6408E-13  2.6770E-12
 -4.2082E-12  5.1132E-12 -8.4818E-13  1.4415E-12  2.6770E-12  3.7536E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -13.467355   26.736582   -0.981514    0.006387    0.025806  2457041.554318
# Heliocentric elements and errors
Epoch:              2457040.5000  =  2015/01/18
Mean Anomaly:          343.74835 +/-     0.020
Argument of Peri:      354.94312 +/-     0.042
Long of Asc Node:       62.61540 +/-     0.001
Inclination:            23.00498 +/-     0.001
Eccentricity:         0.30821841 +/-    0.0002
Semi-Major Axis:     52.96347183 +/-    0.0109
Time of Perihelion: 2463396.1227 +/-       7.7
Perihelion:          36.63915475 +/-    0.0117
Aphelion:            69.28778891 +/-    0.0168
Period (y)              385.4543 +/-      0.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           32.51418941 +/-    0.0009
Ecliptic Y           17.48092350 +/-    0.0005
Ecliptic Z           -8.84398076 +/-    0.0003
Ecliptic XDOT        -0.00154159 +/-    0.0000
Ecliptic YDOT         0.00254274 +/-    0.0000
Ecliptic ZDOT         0.00107775 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.96012638 +/-    0.0008
Geocenter to KBO     37.97539996 +/-    0.0011
# Hcoef:  7.86

The following table shows the complete astrometric record for 16RL82. 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 (16RL82) followed by the observatory code and reference code for the source of the astrometry.

2015 01  19.05354  01 58 31.925  -02 16 18.21  24.5g 16RL82    W84  C~55Zp      
2016 09  10.30219  02 17 17.306  +00 11 35.01  23.3r 16RL82    W84  C~55Zp      
2016 12  23.05251  02 09 45.903  -00 13 15.13  24.3r 16RL82    W84  C~55Zp      
2017 10  13.24804  02 20 35.491  +01 05 49.72  23.9r 16RL82    W84  C~55Zp      
2017 10  21.22556  02 19 55.139  +01 02 42.25  24.2g 16RL82    W84  C~55Zp      
2017 11  16.18502  02 17 41.187  +00 55 01.50  22.8r 16RL82    W84  C~55Zp      
2017 12  07.03810  02 16 07.846  +00 52 57.41  23.1i 16RL82    W84  C~55Zp      
2018 09  11.33153  02 28 23.045  +02 27 59.25  22.8i 16RL82    W84  C~55Zp      
2018 09  11.33817  02 28 23.020  +02 27 58.96  23.7r 16RL82    W84  C~55Zp      
2018 09  11.33956  02 28 23.010  +02 27 59.23  24.0g 16RL82    W84  C~55Zp      
2018 11  29.17757  02 22 16.220  +02 02 00.86  24.4g 16RL82    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     0.00       0.00    -0.06
     2   1.6434  18985.16     0.09    2280.26     0.04
     3   1.9274  12088.40    -0.01    3303.34    -0.01
     4   2.7329  22966.11    -0.12    4274.53    -0.15
     5   2.7547  22326.15    -0.17    4314.63     0.18
     6   2.8258  20262.97     0.17    4599.64    -0.04
     7   2.8829  18898.61    -0.04    4983.11     0.19
     8   3.6448  31423.34     0.09    6420.33    -0.09
     9   3.6449  31422.88    -0.03    6420.19    -0.19
    10   3.6449  31422.84    -0.00    6420.50     0.13
    11   3.8607  25619.36     0.03    6911.08    -0.00

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.

16RL82    quality flag:3

Type:        7:3EEEE   7:3EEEE   7:3EEEE

axisobj        53.592    53.621    53.563
ecceobj         0.314     0.315     0.314
incobj         22.976    22.976    22.977
qmin           36.250    36.254    36.251
qmax           70.706    70.757    70.654
amean          52.968    52.968    52.968
amin           52.397    52.369    52.406
amax           53.697    53.724    53.672
emean           0.276     0.285     0.262
emin            0.222     0.253     0.192
emax            0.317     0.317     0.316
imean          23.097    22.753    23.589
imin           21.756    21.771    21.743
imax           24.891    23.727    25.621
excite_mean     0.480     0.481     0.480
fracstop        1.000     1.000     1.000
cjmean          2.913     2.912     2.912

libcent 0       185.1     175.2     181.4
libamp  0       144.4     139.7     155.6
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       115.1     141.8      98.1
kozaiamp        180.0     180.0     180.0