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RICHARD COFER

VdB 141 Ghost Nebula

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Posts Made By: Dave Mitsky

January 10, 2008 07:38 AM Forum: Beginning Astronomy?

which would you rather have?

Posted By Dave Mitsky
Given those criteria, the 12" seems to be the obvious choice.

January 30, 2008 09:53 AM Forum: Eyepieces

Is this an optimal eyepiece for my 12" dob?

Posted By Dave Mitsky
The 12mm T4 certainly would be a good choice. However, it is actually a 1.25" hybrid eyepiece, having both 1.25" and 2" barrel diameters, not a 2" eyepiece.

Dave Mitsky

February 1, 2008 09:35 AM Forum: Solar System Observing

Jupiter and Venus

Posted By Dave Mitsky
Very nice, Linton. I had a look at the pair on Thursday morning. There was a fine sunrise in my neck of the woods too but not quite as colorful as the one in your image.

Dave Mitsky

February 15, 2008 02:50 PM Forum: Deep Sky Observing

Have you bagged this one this winter?

Posted By Dave Mitsky
It's an old favorite. An even more exotic (and difficult) planetary in Gemini is Abel 21, the Medusa Nebula (PK 205+14.1).

http://www.ne.jp/asahi/stellar/scenes/object_e/medusa.htm
http://antwrp.gsfc.nasa.gov/apod/ap071123.html

Dave Mitsky

February 26, 2008 07:51 PM Forum: Deep Sky Observing

Why is the sky dark at night?

Posted By Dave Mitsky
Magnus,

Here are a few websites to consult:

http://math.ucr.edu/home/baez/physics/Relativity/GR/olbers.html

http://en.wikipedia.org/wiki/Olbers'_paradox

http://www.arachnoid.com/sky/index.html

http://www.faqs.org/faqs/astronomy/faq/part9/section-17.html

Dave Mitsky

March 11, 2008 10:25 AM Forum: Deep Sky Observing

Opinions?

Posted By Dave Mitsky
With a relative handful of exceptions, the vast majority of galaxies visible in amateur telescopes are quite small in apparent size and I usually use exit pupils of 1.5 to 2.5mm when observing such objects. One of the telescopes that I've employed to view galaxies and other DSOs over the years is a 17" f/15 classical Cassegrain, which would be the very antithesis of a "deep-sky telescope" according to some. With this scope, I find magnifications of 162 to 259x very useful.

http://www.clarkvision.com/visastro/m51-mag/index.html

http://www.clarkvision.com/visastro/m51-apert/index.html

Dave Mitsky


March 28, 2008 07:28 AM Forum: Deep Sky Observing

Discovering NGC 2477

Posted By Dave Mitsky
See my comments at http://www.astromart.com/forums/viewpost.asp?forum_post_id=506576

Dave Mitsky

April 4, 2008 07:31 AM Forum: Deep Sky Observing

This forum

Posted By Dave Mitsky
Inge,

Due to the weather, which has been terrible overall, and other factors the past year or so has been rather bad for me when it comes to quality observing sessions at good dark sites and other than my annual pilgrimage to Stellafane I haven't taken an "astronomical holiday" anywhere distant since the fall of 2006. Because the skies there have been so degraded during the past 15 years, observing at the relatively nearby Naylor Observatory is unproductive when it comes to seeing challenge deep-sky objects. I'm long past the point where I feel the need to post observing reports on mediocre views of showcase DSOs.

Dave Mitsky

April 28, 2008 11:14 AM Forum: Reflectors

Mag1 Portaball

Posted By Dave Mitsky
I spent some time talking with Dave Juckem, the new owner of Mag 1 Instruments at the NEAF on Saturday. A number of improvements have been made on the new 8" Portaball.

Dave Mitsky

April 29, 2008 09:17 AM Forum: Maksutovs

305mm f/12.5 Astro-Physics Maksutov-Cassegrain

Posted By Dave Mitsky
The prices of the 305mm f/12.5 Maksutov-Cassegrain carbon fiber OTA and the 3600GTO "el Capitan" mount have not been released but there is now other information on both items available at the Astro-Physics site.

http://www.astro-physics.com/ (Products)

Dave Mitsky

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