[Lvas] M-27 and other

Thu Jul 23 09:55:26 PDT 2009

I think I remember us extending M-27 for a month because of the weather.
I captured this one over several nights, mostly in May before the clouds
descended. It is a stack of 33 300 second exposures, dark subtracted.
Stacked with Deep Sky Stacker and processed in PhotoShop. 

Jim Gianoulakis
Manager Application Services Mobile
702-876-7093
702-253-7213 fax
jim.gianoulakis at swgas.com 

>>> roger ivester <drivester at hotmail.com> 6/13/2009 7:19 PM >>>
All,

I am very excited to get started on M-27, as I too have not noted any
stars with my 10-inch. I do however have a note from a previous
observation back in the mid 90's using a 14.5-inch reflector, recording
a number of faint stars.

I am most anxious to try with my 4-inch. If John Mallas can see "many"
stars within the M-27 nebula using a 4-inch...I should also.   

RE: M-13; June observers challenge.

I was planning on a new sketch last night using my 10-inch, but due to
the extreme humidity, the transparency was terrible. It was clear, but I
could only see (constantly) the two brighter bowl stars of the little
dipper and polaris. I did not think it worthy to get my scope out.
Limiting magnitude would have been four or less...certainly not good
enough to attempt the propeller.  

We have had more rain this year to date than any year in the past
twenty. We are over three inches about average. It is so wet that
farmers are having difficulty getting their hay cut or put into their
barns.  

The biggest problem for observing in the south during the late spring
and summer months is extremely high humidity. The dew point is normally
about 65*, and the skies are hazy all the time. It was almost 90* today
with 90% (+) humidity. We have been having violet thunderstorms almost
every evening...sometimes receiving an inch or more of rain.  

As I have mentioned before, double stars are not affected by the poor
transparency...if you can find them. The seeing and stability is
normally very good due to the consistency of the temperatures within the
various layers of atmosphere. 

Roger

From: rayworth1969 at hotmail.com 
To: lvas at lvlug.org 
Date: Sat, 13 Jun 2009 15:09:54 -0500
Subject: Re: [Lvas] M-27 and other

All,

Here is another one where I missed something. I've observed M-27 many
many times but concentrated on the dumbbell shape and not too many other
details. I remember seeing individual stars within it, but never took
note of them. If the night is good and you have decent aperture, you may
see flaking at the edges of the nebula along with sevral stars. Maybe
even the central star.

FRed

From: drivester at hotmail.com 
To: lvas at lvlug.org 
Date: Thu, 11 Jun 2009 16:26:10 +0000
Subject: [Lvas] M-27 and other

All,

I was going through my notes regarding M-27, and realized that I had
done some pretty extensive work on this object. It was one of the
objects in my first and only publication to date. 

In 1995 and 1996, I went through The Finest Deep-Sky Objects by James
Mullaney and Wallace McCall, Sky Publishing Corporation, with three
printings, 1966, 1972, and 1978. This was my first deep-sky reference
book many years ago. 

I wanted to do extensive visual work and include a more precise and
modern update of this excellent book. I ended up spending over 250 hours
at the eyepiece and another 50 hours to summarize within a period of
less than one year.

Tom English helped me to print this book at GWU and I sold over 100
copies, mostly locally. I have included a picture of my front cover. If
you will notice it has a picture of M-27, showing a very round, almost
bubble like appearance. I used the orginal Mullaney/McCall cover picture
on my publication along with some of my notes, etc.  

I am thinking about revising this book and self publishing again on a
broader scale. 

The (+)1 was the Crab Nebula, as Jim Mullaney said that he should have
included in their orginal publication in 1966.

Mullaney and McCall used the famous Allegheny Observatory, University
of Pittsburgh, during their original survey, and the writing of the
book.

Both astronomers used a variety of telescopes at this facility, but one
of particular interest would be the very, very famous 30-inch refractor.
Do a little Google research and find out about the stolen lens, and
other interesting reading regarding this scope and observatory. 

Roger Ivester

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