Laurent Zimmermann wrote:

"... I tried to have animations with a time step of one synodic period
(computed by hand) for some Kuiper belt asteroids. The time step is
indeed rounded to 1 year, so I didn't got the desired animation."

The display in the Animation dialog is rounded. But if you enter
a step size of (say) 378.1204 days, it will be used properly... it'll
just show up incorrectly on the button.

Still, it's annoying to have the displayed time step be chopped up
in this manner. I've fixed it.

-- Bill