Hi Bill,

Sorry for my not so clear explanation of the "trail bug"!

You wrote:

> The behavior you mention is actually intentional.
> Suppose you were starting a trail at 10:00, and
> wanted labels every six hours. If the labels
> started at 10:00, then there would be labels at
> 16:00, 22:00, and 4:00. But it would make more
> sense (usually) to have the labels at 0:00, 6:00,
> 12:00, and 18:00.
> There is one remaining small issue: right now,
> the first point on the trail is _not_ labelled.
> I may fix this, but it's possible that I will
> stick with the current "only interior points on
> the trail are labelled" scheme, at least until
> after the update is posted.

Very well, the "bug" is gone! :-)

Personally, I prefer to be in total control of index marks and labels
of planet trails and program output at large (one of the many
features the user can find in Guide), but i can live with the present
behavior (the very last update of 2008, march 12).

And now a "new feature" request: is it possible to have an animation
interval "automagically" calculated equivalent at consecutive days
with the sun at the same height over (or under) the local horizon?
Naturally, the height of the sun will be user inputed... ;-)

Thank you very much for your work,

Tiziano Magni