Dear Ole,There is this long-running issue in astroplan 0.8: https://github.com/astropy/astroplan/issues/416.
It is claimed to be solved, but I just tried and it still fails.
I can try to patch the version currently in Debian so that it is compatible with astropy 5.3, or disable the problematic tests (potentially a lot) in astroplan 0.8.
What do you think is best? Regards Vincent
