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: 16GH399 # Created Sun Oct 19 01:11:28 2025 # Orbit generated from Bernstein formalism # Fitting 14 observations of 14 # Arc: 34.95d # First observation: 2016/03/07 # Last observation: 2016/04/11 Preliminary a, adot, b, bdot, g, gdot: -0.000001 0.024826 -0.000001 -0.000477 0.023780 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 12.25 DOF: 23 RMS: 0.17 # Min/Max residuals: -0.35 0.28 # Exact a, adot, b, bdot, g, gdot: 1.442108E-05 2.258497E-02 -1.506314E-06 -2.520485E-04 2.325067E-02 -9.828923E-03 # Covariance matrix: 8.4699E-13 5.6368E-10 -6.8083E-14 -6.0044E-11 1.0780E-10 3.5946E-09 5.6368E-10 8.8697E-07 -1.0583E-10 -9.3703E-08 1.6722E-07 5.1317E-06 -6.8083E-14 -1.0583E-10 4.9279E-13 5.9702E-12 -2.0010E-11 -6.4378E-10 -6.0044E-11 -9.3703E-08 5.9702E-12 9.9738E-09 -1.7651E-08 -5.3279E-07 1.0780E-10 1.6722E-07 -2.0010E-11 -1.7651E-08 3.1680E-08 1.0519E-06 3.5946E-09 5.1317E-06 -6.4378E-10 -5.3279E-07 1.0519E-06 7.6881E-05 # lat0 lon0 xBary yBary zBary JD0 12.715903 -150.865048 0.662699 0.161827 -0.716508 2457455.103509 # Heliocentric elements and errors Epoch: 2457450.5000 = 2016/03/03 Mean Anomaly: 324.61883 +/- 24.413 Argument of Peri: 178.07809 +/- 11.010 Long of Asc Node: 115.66442 +/- 0.851 Inclination: 12.51363 +/- 0.007 Eccentricity: 0.46872224 +/- 0.3909 Semi-Major Axis: 58.08453990 +/- 24.9734 Time of Perihelion: 2473341.7806 +/- 3898.7 Perihelion: 30.85902454 +/- 26.2995 Aphelion: 85.31005527 +/- 43.1390 Period (y) 442.6893 +/- 285.50 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -37.61408393 +/- 0.2805 Ecliptic Y -20.20757702 +/- 0.1563 Ecliptic Z 9.46707981 +/- 0.0725 Ecliptic XDOT 0.00227512 +/- 0.0009 Ecliptic YDOT -0.00178346 +/- 0.0005 Ecliptic ZDOT -0.00028370 +/- 0.0002 # Distances at JD0 (AU) Heliocenter to KBO 43.73546706 +/- 0.2523 Geocenter to KBO 43.00950809 +/- 0.3292 # Hcoef: 9.34
The following table shows the complete astrometric record for 16GH399. 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 (16GH399) followed by the observatory code and reference code for the source of the astrometry.
2016 03 07.60272 14 06 13.56 +00 44 49.4 26.0g 16GH399 T09 C~99ve 2016 03 07.63334 14 06 13.46 +00 44 50.0 26.7g 16GH399 T09 C~99ve 2016 03 07.64836 14 06 13.39 +00 44 50.4 25.9g 16GH399 T09 C~99ve 2016 04 08.54746 14 04 18.81 +01 00 01.3 25.6r 16GH399 T09 C~99ve 2016 04 08.54958 14 04 18.80 +01 00 01.3 25.7r 16GH399 T09 C~99ve 2016 04 08.56247 14 04 18.75 +01 00 01.6 25.7r 16GH399 T09 C~99ve 2016 04 08.57093 14 04 18.71 +01 00 02.0 25.1r 16GH399 T09 C~99ve 2016 04 11.44440 14 04 06.52 +01 01 18.9 25.3i 16GH399 T09 C~99ve 2016 04 11.44782 14 04 06.48 +01 01 19.2 25.6i 16GH399 T09 C~99ve 2016 04 11.46760 14 04 06.43 +01 01 19.5 25.5i 16GH399 T09 C~99ve 2016 04 11.48411 14 04 06.34 +01 01 19.7 25.8i 16GH399 T09 C~99ve 2016 04 11.51385 14 04 06.19 +01 01 20.7 25.6i 16GH399 T09 C~99ve 2016 04 11.53541 14 04 06.12 +01 01 21.4 25.9i 16GH399 T09 C~99ve 2016 04 11.55443 14 04 06.04 +01 01 21.5 25.0i 16GH399 T09 C~99ve
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 0.28
2 0.0001 -1.61 0.09 0.04 -0.05
3 0.0001 -2.74 -0.29 0.05 -0.22
4 0.0875 -1930.71 0.01 257.18 -0.02
5 0.0875 -1930.85 0.02 257.12 -0.08
6 0.0875 -1931.66 0.11 257.14 -0.10
7 0.0875 -1932.36 -0.01 257.31 0.04
8 0.0954 -2130.53 0.07 265.92 0.10
9 0.0954 -2131.20 -0.35 265.99 0.17
10 0.0955 -2132.01 0.24 266.02 0.15
11 0.0955 -2133.34 0.06 265.73 -0.17
12 0.0956 -2135.80 -0.30 265.89 -0.07
13 0.0956 -2137.03 -0.01 266.18 0.17
14 0.0957 -2138.19 0.17 265.86 -0.19
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.