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Re: Calculate star rise or set time?
From: Geoffrey Kolbe
Date: 2015 Nov 19, 09:27 +0000
From: Geoffrey Kolbe
Date: 2015 Nov 19, 09:27 +0000
On Thu, Nov 19, 2015 at 4:55 AM, Frank Reed <NoReply_FrankReed@fer3.com> wrote:
.....Since you can't see stars right near the horizon in almost all cases, these are reasonable assumptions.
In fact, a simple rule is that a star needs to be a number of degrees equal to its magnitude above the horizon (eg a third magnitude star needs to be three degrees above the horizon) before it is visible. This is simply due to the absorption of light in the atmosphere.
