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If you look carefully you will see that this site is actually rated Bortle 2. It is surrounded by blue (B3). The shading differences between B1 and B2 are very subtle. Are there ANY B1 sites in the USA east of the Mississippi River?

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No, the darkest land areas east of the Mississippi are colored gray in Cinzano's map. Only the center of Lake Superior and territorial waters in the Atlantic and Gulf are colored black.

BTW, I implore people not to state their color zones in terms of Bortle classes. The proper names are black, gray, blue, green, yellow, orange, red, and white. The correlations between these color zones and the Bortle classes listed in the Clear Sky Chart are known to be innacurate in some cases, are hypothetical at best, and are liable to change.

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Tony Flanders

eyeglasses
6x15 and 8x32 monoculars
8x25, 7x35, 10x30 IS, 10x50, and 15x70 binoculars
70mm and 100mm achromatic refractors
4.5", 7", and 12.5" Dobs

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