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: 16AX401 # Created Wed May 21 01:10:47 2025 # Orbit generated from Bernstein formalism # Fitting 18 observations of 18 # Arc: 3.94y # First observation: 2014/12/30 # Last observation: 2018/12/09 Preliminary a, adot, b, bdot, g, gdot: -0.000078 0.023220 -0.000005 0.000559 0.024055 0.000000 # Chi-squared of fit: 6.45 DOF: 30 RMS: 0.11 # Min/Max residuals: -0.20 0.27 # Exact a, adot, b, bdot, g, gdot: 1.561817E-05 2.309812E-02 -2.153100E-07 5.595314E-04 2.415274E-02 -1.292360E-03 # Covariance matrix: 8.4459E-13 -1.1558E-12 3.6975E-15 -2.3729E-14 -7.5973E-13 -1.0839E-11 -1.1558E-12 2.2096E-12 1.4044E-14 4.2331E-14 2.0868E-12 2.2018E-11 3.6975E-15 1.4044E-14 2.5842E-13 -1.2621E-13 4.4477E-14 1.2886E-13 -2.3729E-14 4.2331E-14 -1.2621E-13 9.1189E-14 3.2467E-14 4.4488E-13 -7.5973E-13 2.0868E-12 4.4477E-14 3.2467E-14 2.7949E-12 2.1267E-11 -1.0839E-11 2.2018E-11 1.2886E-13 4.4488E-13 2.1267E-11 2.2896E-10 # lat0 lon0 xBary yBary zBary JD0 -13.581562 133.450001 0.567525 -0.188032 -0.779167 2457021.811903 # Heliocentric elements and errors Epoch: 2457020.5000 = 2014/12/29 Mean Anomaly: 262.50580 +/- 0.211 Argument of Peri: 20.52797 +/- 0.183 Long of Asc Node: 217.40447 +/- 0.003 Inclination: 13.37822 +/- 0.000 Eccentricity: 0.07077534 +/- 0.0006 Semi-Major Axis: 41.60380660 +/- 0.0094 Time of Perihelion: 2483564.9856 +/- 56.8 Perihelion: 38.65928293 +/- 0.0271 Aphelion: 44.54833027 +/- 0.0275 Period (y) 268.3538 +/- 0.09 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -27.82014138 +/- 0.0019 Ecliptic Y 30.18975250 +/- 0.0020 Ecliptic Z -9.72274640 +/- 0.0007 Ecliptic XDOT -0.00181712 +/- 0.0000 Ecliptic YDOT -0.00189846 +/- 0.0000 Ecliptic ZDOT 0.00009615 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.18901777 +/- 0.0019 Geocenter to KBO 41.40316749 +/- 0.0029 # Hcoef: 6.93
The following table shows the complete astrometric record for 16AX401. 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 (16AX401) followed by the observatory code and reference code for the source of the astrometry.
2014 12 30.311125 08 48 14.575 +03 44 28.21 23.6r 16AX401 W84 C~8r7M 2016 01 11.38963 08 52 34.57 +03 25 56.0 23.7g 16AX401 T09 C~8ndh 2016 01 11.39248 08 52 34.55 +03 25 56.0 23.6g 16AX401 T09 C~8ndh 2016 01 11.40097 08 52 34.51 +03 25 56.2 23.6g 16AX401 T09 C~8ndh 2016 01 11.41375 08 52 34.44 +03 25 56.2 23.6g 16AX401 T09 C~8ndh 2016 01 15.34799 08 52 16.81 +03 26 42.7 22.8z 16AX401 T09 C~8ndh 2016 01 15.35337 08 52 16.79 +03 26 42.9 22.9z 16AX401 T09 C~8ndh 2016 01 15.36147 08 52 16.74 +03 26 42.9 22.9z 16AX401 T09 C~8ndh 2016 01 15.36416 08 52 16.72 +03 26 42.9 22.9z 16AX401 T09 C~8ndh 2016 01 15.37226 08 52 16.70 +03 26 43.1 22.9z 16AX401 T09 C~8ndh 2016 02 03.32415 08 50 47.43 +03 32 03.3 22.8y 16AX401 T09 C~8ndh 2016 02 03.39437 08 50 47.10 +03 32 04.6 22.7y 16AX401 T09 C~8ndh 2016 02 03.39708 08 50 47.07 +03 32 04.9 22.7y 16AX401 T09 C~8ndh 2016 02 03.43305 08 50 46.88 +03 32 05.4 23.1y 16AX401 T09 C~8ndh 2016 03 02.117121 08 48 43.505 +03 43 19.88 23.0r 16AX401 W84 C~8r7M 2018 02 19.230143 08 59 53.268 +02 57 43.31 23.5g 16AX401 W84 C~8r7M 2018 02 21.238037 08 59 44.275 +02 58 35.26 23.4r 16AX401 W84 C~8r7M 2018 12 09.233761 09 09 55.682 +02 23 53.23 23.5g 16AX401 W84 C~8r7M
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 -0.10 0.00 0.12
2 1.0324 4048.59 0.13 -0.13 0.02
3 1.0324 4048.30 0.04 -0.21 -0.04
4 1.0324 4047.67 -0.02 -0.18 0.06
5 1.0325 4046.66 -0.16 -0.47 -0.13
6 1.0432 3779.99 0.06 -28.43 -0.05
7 1.0432 3779.65 0.10 -28.32 0.09
8 1.0433 3778.93 -0.06 -28.52 -0.06
9 1.0433 3778.64 -0.16 -28.61 -0.12
10 1.0433 3778.30 0.07 -28.50 0.04
11 1.0952 2404.89 0.08 -88.22 0.08
12 1.0954 2399.78 0.27 -88.33 -0.03
13 1.0954 2399.27 -0.04 -88.16 0.14
14 1.0955 2396.40 -0.20 -88.47 -0.16
15 1.1713 435.17 0.05 53.03 0.04
16 3.1401 10840.19 0.02 187.65 -0.02
17 3.1456 10695.97 -0.13 200.27 -0.13
18 3.9423 20128.66 0.04 749.78 0.15
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.
16AX401 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 41.438 41.462 41.415 ecceobj 0.068 0.069 0.067 incobj 13.369 13.369 13.369 qmin 37.760 37.800 37.757 qmax 45.258 45.262 45.110 amean 41.411 41.413 41.366 amin 41.066 41.095 41.051 amax 41.755 41.744 41.709 emean 0.068 0.068 0.066 emin 0.053 0.053 0.051 emax 0.085 0.085 0.082 imean 14.708 14.698 14.716 imin 13.807 13.795 13.799 imax 15.533 15.521 15.538 excite_mean 0.263 0.263 0.263 fracstop 1.000 1.000 1.000 cjmean 2.990 2.990 2.989 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 178.5 178.8 178.2 kozaiamp 179.9 179.9 180.0