Re: (IAAC) Re: (SNES) How Bright are the Galaxies - Really?

>When looking for visual magnitudes, you want the V(V_T) value.
>If you want to compare the visibility of extended objects,
>compare their m'25v values.
Concise and helpful as ever, Sue. :)
By the way, in the reference I cited, I also noticed the other
(considerably brighter) magnitude "V(V_T^0)" being quoted. How
is this value derived, and does it have any uses for amateurs?
Just a curious question. Clear skies,
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