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Re: (meteorobs) Degrees
It is a good question as to why some people use degrees and others use RA.
However, if you look into the matter of celestial navigation, many of the
reference works use degrees of hour angle. For an example the Air almanac
uses degrees. Hence the military is still using degrees rather than RA.
Slowly it is being changed. As with anything new (less than 200 years) the
military is a little slow on changing. About this time in say 100 years,
they willbe completely changed over.
Robert Warren
>From: Robert Gardner <rendrag@earthlinkdot net>
>Reply-To: meteorobs@atmob.org
>To: "meteorobs@atmob.org" <meteorobs@atmob.org>
>Subject: (meteorobs) Degrees
>Date: Wed, 19 Dec 2001 01:43:13 -0800
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>I am a little confused as to why meteor observers would use degrees to
>express right ascension. Every atlas or astronomical instrument I have
>ever seen or used is graduated in hours and minutes and not degrees. I
>can see using degrees for solar longitude if you also specify an epoch.
>Even there I don't always get what I expect, and I think it doesn't
>always mean the same thing when applied to meteors. If a table of
>showers lists solar longitude under the "Maximum" columns without
>specifying epoch, does that mean that I can use the current epoch table
>to determine the UT of the maximum? I know what solar longitude in
>degrees means physically and why it would be used to specify the
>location of nodes. That doesn't bother me a bit.
>
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