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My assessment was only on an average its mag5 across the sky Kearn. When starhopping I will use mag5 or brighter in the Telrad so I'm only taking into account the stars I dont need to struggle to see.
All the factors you've listed come into play in how to actually calculate a sites darkness, and with so many variables it seems hard to actually determine how dark a site truly is.
Does 1 mag6 star at zenith thats barely recognizable make it a mag6 site?
There doesnt seem to be a true definitive measure of a sites darkness, unless of course you have Chris' cool tool.
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