FreeLists / az-observing / [AZ-Observing] Re: Encke minima/gap, was Re: Observing the weekend of Jan 2-5, 2003

["Matt Luttinen" <mluttinen@xxxxxxxxx>]

Bill,

Thanks for the link, Jeff's article is extremely interesting.

My Astro education continues.

It appears that I have seen the minima (maybe), as the "gap" is
non-existent. Or is it the minima? It doesn't exist either?
Sheesh! Well, I saw something (or nothing). 

Can you see "nothing?" I am starting to think so . . .

It is safe to say that Saturn is going to get some attention from 
me this weekend!

I think I am suffering from contrast effect-induced dyspepsia.

Matt

Bill wrote:

The Encke Minima and Encke Division are recognized by the IAU as two
different features within the A-ring. The Encke Minima is a broad dusky
band, offset slightly from center toward the inner edge, within the
A-ring. The Encke division is a narrow dark gap positioned just inside
the outer edge (78% the distance from the inner to outer edge) of the
A-ring.

Jeff Medkeff posted a well-researched monograph on the subject to SAA in
September 1998:
http://groups.google.com/groups?q=Keeler+gap+group:sci.astro.amateur&hl=
en&lr=&ie=UTF-8&oe=UTF-8&selm=3601565a.17942600%40news.goodnet.com&rnum=
6

Happy 2003,

Bill Ferris
Flagstaff
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