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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Arcturus- what is the arc diameter from Earth?
From: Gary LaPook
Date: 2015 Aug 7, 02:16 +0000
From: Samuel L <NoReply_SamuelL@fer3.com>
To: garylapook@pacbell.net
Sent: Thursday, August 6, 2015 1:51 PM
Subject: [NavList] Re: Arcturus- what is the arc diameter from Earth?
Sam
From: Gary LaPook
Date: 2015 Aug 7, 02:16 +0000
0.00650 inches, about 6 one-thousandths of an inch.
((1.767 x 10^7 km x 2) / 3.472 x 10^14 km ) x 5280 feet per mile X 12 inches per foot = 0.00650 inches.
gl
From: Samuel L <NoReply_SamuelL@fer3.com>
To: garylapook@pacbell.net
Sent: Thursday, August 6, 2015 1:51 PM
Subject: [NavList] Re: Arcturus- what is the arc diameter from Earth?
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
Arcturus 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".
