# NavList:

## A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

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Re: Arcturus- what is the arc diameter from Earth?
Date: 2015 Aug 7, 00:15 -0400

Sin(0.013/3600)*5280*12
Yields the number of inches at a distance of a mile.

That answer is 0.0039" inches, whereas 1/16 of an inch is 0.0625"

Call it 4 thousands of an inch at the distance of a mile.

On Aug 6, 2015 4:52 PM, "Samuel L" <NoReply_SamuelL@fer3.com> wrote:
>
> Peter,
>
> Using your math skill can you give me a scale example of that size? That is, for example; "if Arcturus were 1 mile away it would appear to be 1/16" of an inch in diameter".
>
> What do you think?
>
> Thanks,
>
>
> Sam
>
>
>
>
>
> Arturus is 36.7 light years (3.472 x 10^14 kilometers) from Earth and has a radius of 1.767 x 10^7 kilometers, which I work out to be a semidiameter of 0.013".
>
> View and reply to this message

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