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Sculptor Galaxy (NGC 253)

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Posts Made By: Alex McConahay

October 23, 2008 02:46 PM Forum: CCD Imaging and Processing/Deep Sky

ST-7 Frost problem

Posted By Alex McConahay
My ST-7 is frosting up.

I took out the dessicant plug, put in the dummy plug, and baked the dessicant for about four and a half hours at 350, like it says. I immediately walked the warm dessicant plug to the camera and replaced it. The O-ring looks good. The plug was still warm when I put it in the camera. Three hours later, I took cooled the camera, took flats, and could still see the frost pattern.

Did I do something wrong? Should I have done something else? Any ideas?

Alex

October 24, 2008 04:46 PM Forum: Equipment Talk

Rocket Launch Tonight-Oct 24

Posted By Alex McConahay
Theres a Vandenberg launch tonight at 7:28. It should be visible throughout Southern California.

Should I ask what type of equipment to use on it so that this will be on-topic?

Alex

November 5, 2008 04:30 PM Forum: CCD Imaging and Processing/Deep Sky

My bubble

Posted By Alex McConahay
I have been attempting LRGB with an ST-7 of late. Here is an effort with the bubble.


November 7, 2008 03:18 AM Forum: CCD Imaging and Processing/Deep Sky

Pinwheel from Nightfall

Posted By Alex McConahay
This is the Pinwheel from Borrego-Springs, California at Nightfall last weekend.

Pinwheel was captured with an St-7 on a Celestron 9.25 SCT @ F6.3, Losmandy G-11. Exposures were L (8x4:45) R&G (3x8:00, 2x2), B(3x10:00, 2x2). Processed in Images Plus, Sigma Combine, and Photoshop.

Alex

November 7, 2008 08:48 PM Forum: AstroMart FAQ

Re: Is this for real?

Posted By Alex McConahay
I've emailed the seller asking a few questions.

Notice that the mount looks like a CG-5.....SO you would have to ask whether the scope itself is very large....

Alex

November 11, 2008 11:01 PM Forum: CCD Imaging and Processing/Deep Sky

Imagers in Studio City-Encino California

Posted By Alex McConahay
I got a request from a fellow in Encino, Studio City, Valley, etc. asking if there were any groups for imagers out in that area.

He is a member of our club (Riverside Astronomical Society), but a bit far away to attend our regular astroimaging sessions.

Any ideas?

Alex

November 11, 2008 11:09 PM Forum: Equipment Talk

Chromatic Abberration in eyeball

Posted By Alex McConahay
A couple of times in the past few months, but only a couple, I have noticed a distinct chromatic abberation, like looking through a cheap achro, when looking at a bright object (the moon last night, and Jupiter a month ago). There is a distinct violet glow on one side and not so obvious yellowish on the other.

Is it possible to get Chromatic abberration in a set of human eyeballs?

And why do I not have it always?

Or is it an atmospheric thing?

I have never noticed it before.

And just to make clear about my question, this was without any optical device.

And just to make it on topic in the Equipment Forum, these were with my standard Eyeball Set (generally matched set of two), Level 1.0, release version 1.0, as issued on September 2 1949. These are bluish eyes, if that makes a difference.

Alex

November 15, 2008 02:39 AM Forum: Off Topic Discussions

Columbus Ohio Week before Thanksgiving

Posted By Alex McConahay
I'm coming to Columbus the Thursday before Thanksgiving and staying for a week......Anything happening near Columbus/Upper Arlington of interest? Star parties? Planetarium shows, Club meetings? Perkins Public Night? etc.

Alex

November 20, 2008 11:02 AM Forum: AstroMart FAQ

Regarding Mikhails telescopes and discussion

Posted By Alex McConahay
I would like to ask for some restraint on both sides regarding Mikhail's telescope selling adventure. (See "Is this for real")

I think the point has been strongly made that Mikhails telescopes are not yet ready for prime time. This does not mean that Mikhail is trying to scam anything.

Mikhail is trying to sell a telescope that is not, apparently, finished. As such, there should be no advertising about it here on Astrtomart. Furthermore, he is apparently trying to sell it on EBAY--again therefore, it should not be advertized here. (See Terms of Service, 15 D and H.) But that means he is not doing something according to the terms of service--not that he is a crook.

Let's all get off the internet for a while (It is approaching moonless observing part of the month!). Let's let Mikhail get a scope finished.

Then let's get back toether again.

Alex

November 21, 2008 12:49 AM Forum: AstroMart FAQ

Rosenberg telescope threads

Posted By Alex McConahay
Reluctant as I was to do so, I have deleted some reaction that came in today after I suggested that it was time to move on. I plan to delete all further comments regarding Rosenberg's telescopes for the next week or two.

As has been pointed out....This production is not yet ready for discussion (or advertizing) on Astromart.

If and when it becomes ready, it shold be posted properly--and that probably does not include Frequently Asked Questions Forum.

As I said, hate to do this, but we were not getting anywhere.

Alex McConahay
FAQ Moderator

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