---------- Forwarded message --------- From: Fred Sawyer <fwsaw...@gmail.com> Date: Sat, Jan 22, 2022 at 7:22 PM Subject: Re: What does 'hectemoros' mean, as in Hectemoros Angle? To: Steve Lelievre <steve.lelievre.can...@gmail.com>
Steve, Ptolemy introduced the hectemoros in his version of the analemma - a graphical way to do an orthographic projection. The hectemoros was a circle in the heavens that shows up in the 2D graphical drawing as a straight line representing either morning or afternoon. This line was divided into 6 hours - whence the name. Fred On Sat, Jan 22, 2022 at 7:02 PM Steve Lelievre < steve.lelievre.can...@gmail.com> wrote: > Hi, > > I'm looking for an etymological explanation of the word 'hectemoros' as > used in gnomonics for the direct angle between the East (or West) > Cardinal Point and the current position of the sun on the celestial sphere. > > I have scoured the Internet but the only meaning I can find relates to a > class of person in ancient Greece - serfs who paid one sixth of their > income as rent. Thanks in advance for information about the derivation > as it relates to dialing. > > Regards, > > Steve > > > > > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > >
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