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: 16AB402 # Created Wed May 21 01:10:47 2025 # Orbit generated from Bernstein formalism # Fitting 13 observations of 13 # Arc: 3.05d # First observation: 2016/01/09 # Last observation: 2016/01/12 Preliminary a, adot, b, bdot, g, gdot: -0.000001 0.062838 0.000001 0.003306 0.032235 0.000000 # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # WARNING Fitting with energy constraint # WARNING MRQMIN stopped after 15 iterations -- oscilliatory solution # Chi-squared of fit: 9.73 DOF: 21 RMS: 0.15 # Min/Max residuals: -0.30 0.25 # Exact a, adot, b, bdot, g, gdot: 1.594684E-05 2.771445E-02 7.415922E-07 -1.869961E-04 2.633699E-02 -4.542207E-03 # Covariance matrix: 4.4811E-11 7.4505E-08 4.7195E-12 7.4152E-09 1.2512E-08 1.1749E-07 7.4505E-08 1.2483E-04 7.9019E-09 1.2415E-05 2.0949E-05 1.9638E-04 4.7195E-12 7.9019E-09 7.8715E-13 7.4321E-10 1.3263E-09 1.2463E-08 7.4152E-09 1.2415E-05 7.4321E-10 1.2455E-06 2.0838E-06 1.9519E-05 1.2512E-08 2.0949E-05 1.3263E-09 2.0838E-06 3.5161E-06 3.3049E-05 1.1749E-07 1.9638E-04 1.2463E-08 1.9519E-05 3.3049E-05 9.0271E-04 # lat0 lon0 xBary yBary zBary JD0 -15.033144 130.615540 0.377086 -0.235454 -0.877465 2457396.882069 # Heliocentric elements and errors Epoch: 2457390.5000 = 2016/01/03 Mean Anomaly: 315.60333 +/- 142.668 Argument of Peri: 332.83559 +/- 256.782 Long of Asc Node: 222.00720 +/- 8.879 Inclination: 14.69264 +/- 0.098 Eccentricity: 0.21107804 +/- 0.9100 Semi-Major Axis: 44.32600782 +/- 23.9817 Time of Perihelion: 2470683.8430 +/- 41333.2 Perihelion: 34.96976089 +/- 44.5551 Aphelion: 53.68225476 +/- 49.7066 Period (y) 295.1183 +/- 239.50 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -24.18078842 +/- 1.6994 Ecliptic Y 28.76923107 +/- 1.9820 Ecliptic Z -9.84843097 +/- 0.7012 Ecliptic XDOT -0.00188761 +/- 0.0025 Ecliptic YDOT -0.00223242 +/- 0.0020 Ecliptic ZDOT 0.00010373 +/- 0.0008 # Distances at JD0 (AU) Heliocenter to KBO 38.85062133 +/- 1.8178 Geocenter to KBO 37.96941033 +/- 2.7033 # Hcoef: 8.81
The following table shows the complete astrometric record for 16AB402. 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 (16AB402) followed by the observatory code and reference code for the source of the astrometry.
2016 01 09.38128 08 36 05.08 +03 04 29.8 23.9y 16AB402 T09 C~8r7M 2016 01 09.39286 08 36 05.01 +03 04 30.1 23.6y 16AB402 T09 C~8r7M 2016 01 09.40251 08 36 04.97 +03 04 30.3 24.3y 16AB402 T09 C~8r7M 2016 01 09.42139 08 36 04.86 +03 04 30.5 23.4y 16AB402 T09 C~8r7M 2016 01 11.36542 08 35 55.44 +03 04 49.9 26.1g 16AB402 T09 C~8r7M 2016 01 11.38101 08 35 55.37 +03 04 50.4 25.5g 16AB402 T09 C~8r7M 2016 01 11.39460 08 35 55.31 +03 04 50.2 25.7g 16AB402 T09 C~8r7M 2016 01 11.40736 08 35 55.25 +03 04 50.6 25.8g 16AB402 T09 C~8r7M 2016 01 11.41588 08 35 55.21 +03 04 50.6 25.4g 16AB402 T09 C~8r7M 2016 01 12.33659 08 35 50.68 +03 05 00.5 24.4z 16AB402 T09 C~8r7M 2016 01 12.35006 08 35 50.61 +03 05 00.6 24.6z 16AB402 T09 C~8r7M 2016 01 12.42630 08 35 50.23 +03 05 01.8 24.4z 16AB402 T09 C~8r7M 2016 01 12.42900 08 35 50.20 +03 05 01.6 24.3z 16AB402 T09 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 0.14 0.00 -0.18
2 0.0000 -1.09 -0.10 0.02 -0.05
3 0.0001 -1.72 -0.02 0.06 0.09
4 0.0001 -3.36 -0.28 -0.18 0.04
5 0.0054 -144.66 -0.00 -18.03 -0.13
6 0.0055 -145.81 0.02 -17.82 0.22
7 0.0055 -146.62 0.21 -18.24 -0.08
8 0.0055 -147.59 0.19 -18.09 0.19
9 0.0056 -148.17 0.25 -18.25 0.11
10 0.0081 -216.27 -0.01 -26.28 -0.11
11 0.0081 -217.31 -0.04 -26.45 -0.17
12 0.0083 -223.12 -0.12 -26.77 0.17
13 0.0083 -223.50 -0.30 -27.08 -0.12
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.
16AB402 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0