[Lvas] FW: FW: Observing the Propeller

Wed May 6 16:36:43 PDT 2009

Jonathan,

This is amazing, I was looking at your suggested sight when your e-mail arrived. Please see the following and use a trick that a good friend of mine "Tom English" taught me many years ago. View the image and "squint" your eyes.

www.castfvg.it/ammassi/globu/m13_04.htm

The propeller can be seen so clearly using this technique. 

Re: Sidgwick's remarks concerning moderate aperatures holds ture in many instances of other objects also.

Thank you for sharing...excellent.

Roger Ivester 

    I can see how it might be possible for a man to look down upon the earth and be an atheist, but I cannot conceive how he could look up into the heavens and say there is no God.      Abraham Lincoln

> Date: Wed, 6 May 2009 18:47:03 -0400
> From: jonathan.kade at gmail.com
> To: lvas at lvlug.org
> Subject: Re: [Lvas] FW: Observing the Propeller
> 
> Roger and all,
> 
> The M-13 propeller is one of those famed characteristics I've tried to
> see with a variety of instruments, with no real success. True dark
> skies would probably help a great deal. Here's a discussion that
> shows a pretty good candidate - though it's a far cry from Lord
> Rosse's giant centered propeller.
> 
> http://www.popastro.com/phpBB2/viewtopic.php?t=675&sid=afe5a0521c99b986d76d682b7d2ef5ac
> 
> Then again, his sketch of M1 had more to do with crustaceans than with
> nebulae, too ;)
> 
> I have a certain suspicion of "sweet spot" telescopes for particular
> details in objects. I can't help but recall J.B. Sidgwick's advice
> that, for some reason, the canals on Mars were best observed with an
> instrument of moderate aperture.
> 
> Clear skies,
> 
> Jonathan
> 
> On Wed, May 6, 2009 at 10:45 AM, roger ivester <drivester at hotmail.com> wrote:
> > 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
> >
> >
> >
> >
> >
> >     I can see how it might be possible for a man to look down upon the earth
> > and be an atheist, but I cannot conceive how he could look up into the
> > heavens and say there is no God.      Abraham Lincoln
> >
> >
> >
> >
> >
> > ________________________________
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> >
> > ________________________________
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> > _______________________________________________
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> >
> >
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