[AZ-Observing] Re: az-observing Digest V14 #150
- From: "Ketelsen, Dean A - (ketelsen)" <ketelsen@xxxxxxxxxxxxxxxxx>
- To: "az-observing@xxxxxxxxxxxxx" <az-observing@xxxxxxxxxxxxx>
- Date: Thu, 19 Jun 2014 18:17:46 +0000
All-
Since we're speaking of exact dates now, here is a shot taken from the Grand
Canyon on night one of last year's star party (8 June, 2013). At least on that
night there was a quite active airglow display reaching past Polaris... I've
noticed active airglow the last couple GCSPs - was blaming them on their
proximity to Summer solstice, so upper ionosphere doesn't have long to
discharge again before the sun is back to shining on it... Going to the blog
(www.theketelsens.blogspot.com) and entering "airglow" in the upper left search
box will bring up a few more images and a short time-lapse...
http://3.bp.blogspot.com/-uO77COOxTJ4/UbwSBwEeg3I/AAAAAAAAH6E/TW-GMt_qBKo/s1600/Banded+Airglow+8+June.jpg
-Dean
________________________________________
From: az-observing-bounce@xxxxxxxxxxxxx [az-observing-bounce@xxxxxxxxxxxxx] on
behalf of Robert Ayers [astroayers@xxxxxxxxx]
Sent: Thursday, June 19, 2014 10:29 AM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Re: az-observing Digest V14 #150
I noticed the exact same thing a year ago (June 9 2013). I actually emailed
Brian Skiff and asked "was there a weak aurora last night?"
Brian pointed out that it was near the solstice and that the sun didn't
sink that low. The "extended twilight" was obvious circa 10:30 MST, but
did not, for me, last all night. My notes say "At midnight MST I suspect
that the sky in the north is a bit brighter than a twilight free horizon,
but it is not obvious like the NW is at 10:30". (My northern horizon is a
bit elevated, which complicates this observation.)
(I note that 10:30 MST in Ash Fork is only about 10pm local time, cause the
MST timezone is shifted west -- the centerline for timezone -7 should be
longitude 105, which is over by Albuquerque.)
Bob Ayers
*www.RobertMartinAyers.org <http://www.RobertMartinAyers.org> *
--
See message header for info on list archives or unsubscribing, and please
send personal replies to the author, not the list.--
See message header for info on list archives or unsubscribing, and please
send personal replies to the author, not the list.
Other related posts:
