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If you let your eyes become reasonably dark adapted [say 20-30mins] at
Bortle 8 you can see down to around mag 3.5, which means that the majority of stars on a mag 4 planisphere will be visible with a little effort. It helps a
lot of course if you have a reasonable working knowledge of the sky.
Your astro experience is not going to be that good anyway at B8.
raymo
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