advance selected object to next az/alt crossing

[axd1967]

Is your feature request related to a problem? Please describe.
I'd like to know when a selected object crosses a meridian/azimuth OR altitude so that I can plan a photo session on that direction or altitude.

Describe the solution you'd like
Similar to the Solar altitude for twilight finder, provide a feature that allows me to jump to a preset az OR alt

Describe alternatives you've considered
Manually advance time via the Archaeolines plugin (which provides me a first idea of where an object will cross an az/alt).

Additional context

[github-actions]

This is a good task for the community to participate in the contribution into Stellarium. Who wants to help us?

[github-actions]

Hello @axd1967!

Thank you for suggesting this feature.

[alex-w]

Why don't use shortcuts for Specific Time section?

[axd1967]

because

1. there is no option "selected object at current azimuth at (next/previous) time". (not: at next/previous twilight/evening/morning) ; better is an option to advance time to object's next crossing of display's centerline (which is visualised by the altitude line)
2. there is no option to advance time to "selected object at current altitude at (next/previous) time"

[alex-w]

So, you didn't check the feature...

[gzotti]

(1) is related to the qibla problem ("When does the sun point towards Mecca"). I have solved it on some other tools, but so far I don't know any other use to justify its implementation in Stellarium. It may go into ArchaeoLines, though.
(2) waits for you to set your favourite hotkey. We don't want to preconfigure 30 buttons or hotkeys for most users who never would press them.