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Douglas Rollain

Lion Nebula SH2-132 - RC71

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Posts Made By: Jim Thommes

October 24, 2007 12:30 AM Forum: CCD Imaging and Processing/Deep Sky

NGC 7789

Posted By Jim Thommes
Thanks for the comments Gus on the NGC 7789 image - much appreciated. Dimitri, Rose Cluster - I like it.

A little off topic...
I am a bit late in the acknowledgement of the comments due to wildfires here in San Diego County (USA). I was briefly evacuated from my residence but I am back now. Some of the numbers - AS of sunset 10/23, 263,000 acres burned, 1,750 homes destroyed or damaged, 500,000 people evacuated. This is just in San Diego County. I am informed that 1M people were evacuated in all of Southern California.

October 24, 2007 04:01 AM Forum: CCD Imaging and Processing/Deep Sky

Autoguiding question

Posted By Jim Thommes
Floyd,
I am sure I am no standard... Here is what I do....
1. K3CCD Tools 30ms/arc sec (That's how it's set in K3CCDTools). BTW G11 is set at a guide rate of 0.5 siderial.
2. Min distance .6 - 1.0 RA, .8 - 1.2 Arc sec. Depending on seeing.
3. Rate for guiding (Correction rate?) depends on guide star 1.5 sec to 2.5 sec - exposure time is of course less.
4. PEC off (I have done PEC on did not see much difference but I may have judged too quickly)
5. DEC guiding on.


October 24, 2007 04:09 AM Forum: CCD Imaging and Processing/Deep Sky

M78 at Okie-Tex

Posted By Jim Thommes
John,
Looks real good. I think the processing looks pretty good. What other ideas would you like to try?


October 26, 2007 12:27 AM Forum: CCD Imaging and Processing/Deep Sky

M1

Posted By Jim Thommes
Nice Catch Charlie,

I agree, this object typically needs a bit more time. I wonder if you have the dark point set a little low and are missing some faint detail at the edges of the object.

October 30, 2007 04:32 AM Forum: CCD Imaging and Processing/Deep Sky

M42 processing question

Posted By Jim Thommes
Kerry,
This is a nice image - too bad about the diagonal line. I don't think I have ever seen anything like that.

What is your image data source? Is this from a one shot color CAM or is it separate LRGB exposures?


October 30, 2007 04:39 AM Forum: CCD Imaging and Processing/Deep Sky

The Little Dumbbell

Posted By Jim Thommes
Thanks all for the comments.

November 9, 2007 04:52 AM Forum: CCD Imaging and Processing/Deep Sky

M42 luminosity

Posted By Jim Thommes
Charlie,
Great images. I really like the Luminosity image. It shows the Trapezium well as well as all the other stars in the vicinity.


November 9, 2007 04:53 AM Forum: CCD Imaging and Processing/Deep Sky

NGC 7331 Deer Lick Group

Posted By Jim Thommes
Nice one Floyd.

November 9, 2007 05:09 AM Forum: CCD Imaging and Processing/Deep Sky

The Owl Cluster

Posted By Jim Thommes
Thanks for the comments guys...

Bill Madewell said:

Very Very nice.....
Since I have a lack of imaginaton, can someone draw the lines ?


Well, not exactly lines... but the best way to think of it is to mentally rotate the image 180 degrees. The Owl's head (as presented) is at the bottom. The two bright stars are the eyes. The wings extend out to the sides and the body and tail are the brighter blue stars of the cluster. Yeah, the more I think of it, it does take a bit of a stretch of the imagination.


November 12, 2007 01:41 AM Forum: CCD Imaging and Processing/Deep Sky

California Couds

Posted By Jim Thommes
John,
Great image!

Sometimes even after we stop, we go back again for some more reprocessing.

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