[AZ-Observing] Re: best seeing sites and times

  • From: Brian Skiff <Brian.Skiff@xxxxxxxxxx>
  • To: az-observing@xxxxxxxxxxxxx
  • Date: Sun, 14 Mar 2004 22:13:50 -0700 (MST)

     You can avoid the subjective nature of the various arbitrary scales
by going with estimates of the image blur-size in arcseconds.  The list
of similarly-bright and roughly-equal double stars available here:

ftp://ftp.lowell.edu/pub/bas/dbls.fil

...was built with exactly this purpose in mind.  The idea is to look
at a few of these that are as near the meridian as possible and find
(or interpolate) the separation at which the two star images are
just touching.  A compilation of estimates I've made at various
places is at the same place:

ftp://ftp.lowell.edu/pub/bas/seeing.vis

...which is drrawn from an 'amastro' post from a few years ago.

\Brian
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