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Posts Made By: Maurice Clark

May 17, 2005 11:29 PM Forum: Equipment Talk

entry level CCD

Posted By Maurice Clark

Hi Shawn,

You can get some good information to help you work out what pixel size will make you scope best at the "CCD University".

http://www.ccd.com/ccdu.html

Also, in the past I have used SBIG CCD's with a mac.

Have you checked out their website?

http://www.sbig.com/

Regards,

Maurice

May 30, 2005 04:42 AM Forum: Deep Sky Observing

NGC 5139 (Omega Centauri)

Posted By Maurice Clark

Hi David,

Believe me, if you have never seen this object near the zenith with a large telescope, you have never observed!! grin grin

May 30, 2005 04:43 AM Forum: Deep Sky Observing

NGC 5139 (Omega Centauri)

Posted By Maurice Clark

Hi David,

Believe me, if you have never seen this object near the zenith with a large telescope, you have never observed!! grin The view of this object alone is worth the cost of a trip "down under". And when you add to it all of the other fantastic southern objects........... What are you waiting for! wink grin

Cheers,

Maurice

June 12, 2005 03:24 PM Forum: Religion

Refreshing and original idea.

Posted By Maurice Clark

Hi Darrell,

Without wishing to comment on what the pope said, not having read his comments, I am curious. What is it about a church leader recommending to his parishoners that they life a life of morality, that they refrain from sex before marriage, that they do not have extra-marital affairs, all of which are proscribed in the book that the pope claims to follow, that you object to? After all, you cannot get HIV if you do not do any of these things. Or do you consider it fine and proper to have extra-marital affairs, etc?

Regards,

Maurice

June 20, 2005 12:12 AM Forum: Deep Sky Observing

Interacting(?) Galaxies Near M12

Posted By Maurice Clark

Hi Bill,

Interesting catch. It just goes to show that you never know what my be hiding alongside those bright DSO's. grin

A bit of checking shows that they are listed as MAC 1647-0202 A and B. MAC stands for Mitchell Anonymous Galaxy Catalog No magnitudes were given but the sizes were 0.6' x 0.4' for "A" and 0.4' x 0.2' for "B".

A little more searching shows that these are also listed in the USNO-A2.0 catalog. However I do not have the resources here at home to check the catalog numbers. The catalog magnitudes are: for "A" blue 16.2 and red 13.8; and for "B" blue 16.3 and red 13.4. These show that there is considerable interstellar reddening in the area. Not surprising considering their location.

Looking at these numbers, I would estimate they are at about mag 14.5 in the visual, which should make them visible in 14" telescopes or larger, and even in as small as 10" if the skies are really dark. (LM 7.0+) The biggest problem with viewing them would be interference from the stars and glow of M12. This might make a for larger telescope to be required than would be expected from the magnitudes alone.

As to possible interaction, from looking as DDS images, it does not seem like they are. There is no obvious disortion in them. You can check for yourself on the DSS images at:

http://archive.stsci.edu/cgi-bin/dss_form

To get the correct field, enter RA 16 47 00 DEC -02 03 26. If you do not have software that will let you view FITS images, change the "FILE FORMAT" to "GIF". That way it will display on your monitor.

I have not had the chance to check if anyone has taken any spectra, which could give the distances. I would be doubtful if anyone has since there are in such a crowded field. However you never know.

Kim Coulter, where are you? We need you to have a look with your 40"! grin

Hope this helps.

Regards,

Maurice

edited for spelling! sad

June 29, 2005 02:41 PM Forum: After Dark

You know it is a dark sky site when.........

Posted By Maurice Clark

When you can see M81 or NGC 5128 with the naked eye!

Cheers,

Maurice

June 30, 2005 03:14 AM Forum: Politics

Second MAD COW From Texas Identified.

Posted By Maurice Clark

Hi Tom,

"Officials said beef from Texas and the rest of the U.S. is the safest in the world. "

Whoever said that has obviously never heard of Australian or New Zealand beef!!!

It is because USA beef is so unsafe that so many other countries get their beef from there. (including the USA!!!)

Cheers,

Maurice

August 22, 2005 05:41 PM Forum: CCD Imaging and Processing/Deep Sky

Images from Oz. NGC 2070

Posted By Maurice Clark

This one is my favourite globular cluster, NGC 104, more commonly known as 47 tucanae.

This only shows the cluster core. The rest of the cluster overfills the field of view!

10 1 minute images, 300mm f/6 newtonian and ST-9

August 23, 2005 01:44 PM Forum: CCD Imaging and Processing/Deep Sky

H-alpha view of Pelican Nebula -- wide and narrow

Posted By Maurice Clark

Hi Thomas,

That wide-field image is fantastic.

Cheers,

Maurice

August 29, 2005 09:27 PM Forum: CCD Imaging and Processing/Deep Sky

A few more Oz images. NGC 55

Posted By Maurice Clark

NGC 247, another member of the Sculptor group. This one has a reputation of being rather faint for visual observing.

5 x 3 minute exposures. 300mm f/6 newtonian + ST-9E.

Enjoy

Maurice