From: "hpholcomb" <hpholcomb@yahoo.com>
Date: July 31, 2008 3:06:17 PM MDT
To: Astro_IIDC@yahoogroups.com
Subject: Re: First Light with PGR GRAS14S5M Camera-Filters????
Milton,
Sorry, for some reason I though you were in Toronto! Yes, Calgary is "up there"!
Since you must have become somewhat of an expert at dealing with anthropogenic (being
a geologist, you'll appreciate that adjective!!) light pollution, do you use any filters in your
work? You may have mentioned them in other posts, but this would be a good place for
restating that.
Thanks.
Perry
--- In Astro_IIDC@yahoogroups.com, Milton Aupperle <milton@...> wrote:
On 31-Jul-08, at 2:18 PM, hpholcomb wrote:
Hey Milton,
It's a wonder you got anything at all! I can see the effect of the
wind.
Yep. The motors for both Ra/Dec got a good workout last night trying
to compensate for turbulence and wind.
So you now live at 52 deg. north latitude, having remembered the
Arctic Circle is at 66
deg. + some minutes. Gee, that's above Winnipeg!!
Actually I'm at 51° 1 minute so it's 15.5 degrees south of the Arctic
circle. I'd forgotten that the Arctic Circle isn't at 65°, which is
odd cause I use to live well north of it (70 to 75°N) when I was a
mining geologist. Winters up there are interesting as the sun never
rises much above the horizon. Summers are worse cause your always in
twilight and that screws up your internal clock making it hard to sleep.
Whereforeareyounow??
Still in Calgary, but 8 km south from the city core where I used to
live. On a good night i can almost see Mag 4.5 visually here. At the
old place a good night was Mag 2 near the downtown core, which has
non stop construction and light pollution among other things going
on. Also I now have the entire western sky to look at as there is no
overhanging balcony to hide the stars anymore. To get Mag 5 or better
skies, I need to move at least 100 km from Calgary's city boundary,
which has kept growing bigger and bigger each year as people flock
here looking for work.
TTYL..
Milton J. Aupperle