Ronn!Blankenship <[EMAIL PROTECTED]> wrote that he created
... charts of the area around the constellation Orion showing what
it would look like to each of those (based only on the
sensitivity)
I could not figure out how to do this until Ronn reminded me that a
computerized sky chart program enables one to set different limiting
magnitudes. I do this all the time in order to compare what I will
see in my light polluted area with my naked eye and 50 mm binoculars.
Sad to say, I did not include cats and owls in the same thought
pattern as sky charts!
Ronn suggested the following limiting magnitudes:
4.5 for a human in a light-polluted area;
6.5 for a human with a dark sky;
8.3 for a cat with a dark sky, since a cat's eyes are
6 times as sensitive as a human;
11.5 for an owl with a dark sky, since an owl's eyes are
100 times as sensitive as a human.
--
Robert J. Chassell
[EMAIL PROTECTED] GnuPG Key ID: 004B4AC8
http://www.rattlesnake.com http://www.teak.cc
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