Alfredo ha scritto:

> is possible and how to display the phase of opposition of the asteroids
> on Guide to simulate the favorable position of the asteroids for their
> observation?

I am afraid there is not a direct menù item to show what you are asking
for. However you can overcome the problem this way.

Click on Help > Quick info and annotate the Sun's RA in your mind.

Click on Tables > Current asteroids; set the limit magnitude and click
ok. You will see an asteroids list. Order the list by RA clicking on the
RA label at the top of the list.

Asteroids with RA roughly equal to Sun's RA + 12 are at opposition.

Asteroids with RA a bit lesser (say 1-2 hours) will be at the opposition
shortly after.

I know it is not exactly what you were looking for but it allows you to
plan your observation a few weeks in the future.

Riccardo Papini