Re: (IAAC) Obj: M 42, Trapezium - Inst: 25" Obsession

Hi Randy,
Thanks for the report!  With that sized scope (WOW)  colors must be quite
common, huh?
<BG>.  During the spring and summer months, I rely on color in the Ring
Nebula to gauge my sky conditions. The more distinctly green it looks, the
better and clearer the skies are.
Another weird way I gauge sky transparency and darkness... by the amount of
distinctly yellow stars I see.  If I see a lot of yellow suns as opposed to
plain washed out white, it usually means the seeing is going to be very
Thanks again,