[Lvas] FW: Observing the Propeller
roger ivester
drivester at hotmail.com
Wed May 6 07:45:06 PDT 2009
LVAS all,
Just wanted to share an e-mail from earlier this morning, sent to some of my local observing friends.
I want to have some company for additional notes and the opportunity to observe through a slightly larger scope than my 10-inch. We will work on this months objects, the M-65/66 group as well as the June objects.
I want to use a 12-inch Dob owned by Steve Davis "especially" for the M-13 "propeller", as this was the size used by Bortle and Di Cicco for their sightings.
All of these guys are fabulous imagers, but for this session it will be "visual" only. Hopefully we can pull this off in a couple of weeks or so. This should make for a nice report in the LV "Observers Challenge".
See the following e-mail...
Roger Ivester
From: drivester at hotmail.com
To: steve.davis at fascontrols.com; blclapper at yahoo.com; dolive at gardner-webb.edu; jdire at gardner-webb.edu; drivester at hotmail.com
Subject: Observing the Propeller
Date: Wed, 6 May 2009 12:02:45 +0000
Steve, Brett, Dr. Don, Dr. Jim
RE: M-13 and the three dark lanes as first mentioned by WSH in the July 1953 edition of S&T.
Steve, you do have a portable 12-inch Dob...correct?
Could we plan a "serious" observing session at the top of Moore Mountain, in an attempt to try and follow John Bortle and Dennis di Cicco's observations?
Both were able to see the three dark rifts in 1980 and 1981 using 12-inch reflectors. There may be something special about this aperture in regard to seeing the lanes.
If you recall from the previous e-mails, Dennis di Cicco was using the 12-inch porter scope at Stellafane and found them easy at 180x. Bortle had a 12.5 inch and was using 176x
We have plenty of time, but this month might be good for an observation only 20 mins N of Boiling Springs. I want to do a sketch, as a verification that we saw the "propeller"... if indeed it is possible. Other than the 1850's sketch by Lord Rosse I personally have never seen another sketch...especially modern day.
Jim, Don this would present another possibility for an article in S&T next spring...if we are successful.
Steve, you have invited me on many occasions to go with you to the Mt. Mitchell overlook at 4800 ft. I promise if we can not achieve this project here, I would be honored to go with you....really.
I have an obsessive desire to attempt this endeavor and I want a sketch. This is also our "Observers Challenge" project with the Las Vegas group for June. We will also work on the M-65/66 and NGC-3628 for this month LV report.
Gentlemen, please let me know your thoughts regarding...
Roger
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