[AZ-Observing] Re: FWHM measurements for Phoenix skies, anyone?
- From: "AJ Crayon" <acrayon@xxxxxxx>
- To: <az-observing@xxxxxxxxxxxxx>
- Date: Sun, 20 May 2007 21:01:12 -0700
Matt, this will, probably, generate, quite a bit of discussion. I haven't
done anything scientific to answer your question, but I do have quite a bit
of experience observing from my back yard, near 35th Ave and Thunderbird Rd.
Over the years the closes double that I remember splitting with my 8"
telescopes is 3". When I say my 8" telescopes that means the f6 Newtonian
that I owned for about 20 years. It also references the new SCT purchased
around the beginning of this year. The 3" split was not something that
could be done on a consistent basis, only if the observing conditions were
good.
My guess as to why, over 20 years, this kind of observing didn't deteriorate
is because most of the urban sprawl was north of my position. Most of my
observing is to the south or west, the east being right smack dab into
Aurora Phoenicis.
Any reason for settling on the 2+ arc seeing condition?
Hope this helps,
aj
----- Original Message -----
From: "Matt" <mluttinen@xxxxxxxxx>
To: "'AZ-Observing mailing list'" <az-observing@xxxxxxxxxxxxx>
Sent: Sunday, May 20, 2007 8:25 PM
Subject: [AZ-Observing] FWHM measurements for Phoenix skies, anyone?
Hello,
Anyone (crazy enough) out there do enough urban imaging to get a feel for an
average FWHM over Phoenix? Is it usually 2+ arcsec (or worse) or do we
sometimes get below that?
I am about to jump off the imaging cliff and want to know what I am in for.
TYIA,
Matt
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