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: 16NN208
# Created Fri Aug 29 01:11:16 2025
# Orbit generated from Bernstein formalism
# Fitting 26 observations of 26
# Arc: 2.44y
# First observation: 2016/07/03
# Last observation: 2018/12/13
Preliminary a, adot, b, bdot, g, gdot:
-0.000068 0.035704 0.000114 0.010809 0.029980 0.000000
# Chi-squared of fit: 23.70 DOF: 46 RMS: 0.17
# Min/Max residuals: -0.64 0.40
# Exact a, adot, b, bdot, g, gdot:
1.773852E-05 3.717013E-02 4.830729E-06 1.099955E-02 3.153768E-02 8.827393E-03
# Covariance matrix:
1.6912E-13 6.6158E-13 -1.5451E-14 3.5808E-14 8.4360E-13 1.5835E-12
6.6158E-13 9.8851E-12 -2.9014E-13 1.2057E-12 1.0568E-11 5.3759E-11
-1.5451E-14 -2.9014E-13 1.0934E-13 -1.1332E-13 -2.9032E-13 -2.3992E-12
3.5808E-14 1.2057E-12 -1.1332E-13 3.9348E-13 1.0981E-12 1.3860E-11
8.4360E-13 1.0568E-11 -2.9032E-13 1.0981E-12 1.1645E-11 4.8914E-11
1.5835E-12 5.3759E-11 -2.3992E-12 1.3860E-11 4.8914E-11 6.1980E-10
# lat0 lon0 xBary yBary zBary JD0
2.204429 -8.444438 0.950575 0.013781 -0.355310 2457573.076719
# Heliocentric elements and errors
Epoch: 2457570.5000 = 2016/07/01
Mean Anomaly: 22.38094 +/- 0.036
Argument of Peri: 321.64942 +/- 0.095
Long of Asc Node: 342.52696 +/- 0.001
Inclination: 16.62263 +/- 0.001
Eccentricity: 0.34216703 +/- 0.0005
Semi-Major Axis: 44.96356940 +/- 0.0217
Time of Perihelion: 2450724.0499 +/- 9.9
Perihelion: 29.57851840 +/- 0.0283
Aphelion: 60.34862041 +/- 0.0380
Period (y) 301.5084 +/- 0.22
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 31.54962348 +/- 0.0034
Ecliptic Y -5.64751654 +/- 0.0005
Ecliptic Z 1.21986586 +/- 0.0001
Ecliptic XDOT 0.00119596 +/- 0.0000
Ecliptic YDOT 0.00307776 +/- 0.0000
Ecliptic ZDOT 0.00098365 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 32.07430837 +/- 0.0033
Geocenter to KBO 31.70810510 +/- 0.0034
# Hcoef: 10.07
The following table shows the complete astrometric record for 16NN208. 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 (16NN208) followed by the observatory code and reference code for the source of the astrometry.
2016 07 03.57593 23 25 29.91 -01 19 20.9 25.8r 16NN208 T09 C~91Wq 2016 07 03.58630 23 25 29.89 -01 19 21.2 25.7r 16NN208 T09 C~91Wq 2016 07 03.60717 23 25 29.87 -01 19 20.9 25.6r 16NN208 T09 C~91Wq 2016 07 07.53327 23 25 23.84 -01 19 16.2 26.3g 16NN208 T09 C~91Wq 2016 07 07.54329 23 25 23.82 -01 19 16.2 26.1g 16NN208 T09 C~91Wq 2016 07 07.56341 23 25 23.79 -01 19 16.4 26.4g 16NN208 T09 C~91Wq 2016 07 12.54333 23 25 13.81 -01 19 25.8 24.9z 16NN208 T09 C~91Wq 2016 07 12.55760 23 25 13.77 -01 19 25.9 24.3z 16NN208 T09 C~91Wq 2016 07 12.57191 23 25 13.73 -01 19 25.9 24.9z 16NN208 T09 C~91Wq 2016 07 12.60066 23 25 13.67 -01 19 26.1 25.3z 16NN208 T09 C~91Wq 2016 07 29.55118 23 24 21.54 -01 22 01.7 25.1z 16NN208 T09 C~91Wq 2016 07 29.56566 23 24 21.47 -01 22 02.0 24.9z 16NN208 T09 C~91Wq 2016 07 29.58006 23 24 21.41 -01 22 02.2 24.8z 16NN208 T09 C~91Wq 2016 07 29.59445 23 24 21.34 -01 22 02.2 24.8z 16NN208 T09 C~91Wq 2017 09 27.27630 23 26 04.47 -00 21 33.5 24.1z 16NN208 T09 C~91Wq 2017 09 27.28331 23 26 04.42 -00 21 33.8 24.6z 16NN208 T09 C~91Wq 2017 09 27.29036 23 26 04.38 -00 21 34.1 24.0z 16NN208 T09 C~91Wq 2017 09 27.31134 23 26 04.27 -00 21 34.6 25.0z 16NN208 T09 C~91Wq 2017 09 27.31840 23 26 04.22 -00 21 34.6 24.7z 16NN208 T09 C~91Wq 2017 09 27.32540 23 26 04.20 -00 21 35.0 24.8z 16NN208 T09 C~91Wq 2017 09 27.33246 23 26 04.16 -00 21 35.3 24.6z 16NN208 T09 C~91Wq 2017 09 27.34659 23 26 04.05 -00 21 35.7 24.9z 16NN208 T09 C~91Wq 2017 09 27.36776 23 26 03.95 -00 21 36.3 24.5z 16NN208 T09 C~91Wq 2018 12 13.23766 23 29 14.17 +00 40 41.1 25.9i 16NN208 T09 C~91Wq 2018 12 13.27158 23 29 14.26 +00 40 41.4 25.2i 16NN208 T09 C~91Wq 2018 12 13.28616 23 29 14.29 +00 40 41.1 25.1i 16NN208 T09 C~91Wq
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 0.19 0.00 0.14
2 0.0000 -0.39 -0.02 -0.16 -0.13
3 0.0001 -0.55 0.22 0.24 0.04
4 0.0108 -81.83 -0.03 40.15 0.12
5 0.0109 -82.11 -0.05 40.26 0.13
6 0.0109 -82.60 -0.03 40.26 -0.09
7 0.0246 -223.88 0.10 90.51 0.05
8 0.0246 -224.47 -0.01 90.66 0.05
9 0.0246 -225.02 -0.07 90.89 0.13
10 0.0247 -225.93 0.00 91.06 -0.01
11 0.0711 -1005.83 0.08 255.64 -0.11
12 0.0712 -1006.92 -0.13 255.77 -0.12
13 0.0712 -1007.82 -0.17 255.94 -0.10
14 0.0712 -1008.79 -0.27 256.36 0.17
15 1.2340 1841.41 0.12 2983.81 -0.06
16 1.2340 1840.60 -0.06 2983.83 -0.08
17 1.2340 1839.93 -0.09 2983.79 -0.16
18 1.2340 1838.22 0.08 2983.98 -0.08
19 1.2341 1837.53 0.03 2984.27 0.18
20 1.2341 1837.10 0.22 2984.02 -0.11
21 1.2341 1836.43 0.19 2983.98 -0.19
22 1.2341 1834.75 -0.21 2984.26 0.02
23 1.2342 1833.14 0.08 2984.30 -0.06
24 2.4440 5930.13 -0.64 5298.99 0.40
25 2.4441 5931.49 0.20 5298.74 0.17
26 2.4441 5931.78 0.27 5298.28 -0.28
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.
16NN208 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 45.408 45.489 45.326 ecceobj 0.348 0.349 0.346 incobj 16.551 16.552 16.550 qmin 29.307 29.278 29.465 qmax 61.188 64.747 64.870 amean 44.542 45.793 45.638 amin 43.752 45.051 43.815 amax 45.408 47.288 47.390 emean 0.333 0.351 0.346 emin 0.322 0.339 0.323 emax 0.348 0.369 0.369 imean 17.835 17.576 17.582 imin 17.504 17.453 17.449 imax 18.005 17.719 17.839 excite_mean 0.452 0.463 0.459 fracstop 0.006 0.007 0.008 cjmean 2.853 2.852 2.855 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 326.7 327.9 328.9 kozaiamp 4.4 6.0 8.0