Image of the day

Captured by
Bruce Karbal

On The Go

About Astromart

My Account

New to Astromart?

Register an account...

Need Help?

Posts Made By: Jim Thommes

October 26, 2005 08:31 PM Forum: CCD Imaging and Processing/Deep Sky

Planetary Nebula - NGC 6781

Posted By Jim Thommes
Here is a planetary nebula in Aquila. It is taken in a 19' field which may be somewhat large for this object. The last image I posted was a 180' field so this image is toward the opposite end of my range. I have attached a midsize image, but a full size image and exposure / processing details are at:

http://jthommes.com/Astro/NGC6781.htm

Scope was a C8 at f/8; Camera was an Artemis285.

Total exposure time was 84 minutes.

October 29, 2005 02:10 PM Forum: CCD Imaging and Processing/Deep Sky

Open Cluster NGC 6811

Posted By Jim Thommes
Here is a quick image of the open cluster NGC 6811. I have attached a mid sized image, full size image and exposure / processing details are at:

http://jthommes.com/Astro/NGC6811.htm

Scope was a C8 at f/4.2, Camera was an Artemis285.
Time - 34 minutes.



November 1, 2005 09:00 PM Forum: CCD Imaging and Processing/Deep Sky

NGC 7822

Posted By Jim Thommes
This is a combined exposure image from exposures with my C8 and my Megrez II. I still struggle with distortion with my Meade 0.33x FR on the C8, so edge star correction and color come from the Megrez. I have attached a mid size image, but a full size image and exposure / processing details are at:

http://jthommes.com/Astro/NGC7822.htm

Scopes were C8 at f/3.1 and Megrez at f/6.25, Camera was Artemis285

November 9, 2005 08:36 PM Forum: CCD Imaging and Processing/Deep Sky

M31 - Andromeda

Posted By Jim Thommes
Here is an image made with an SLR lens. (I have been trying lenses lately for wide field). It is a familiar object - M31. I have heard some recommend stopping down an SLR lens a step or two for better results. I took some luminance exposures at f/3.5 and some at f/4.5. The f/4.5 images came out clearly better with less star bloat. Of course exposure time was increased accordingly to achieve the same signal strength. I am only showing the f/4.5 data in this image.

I have attached a mid size image - a full size image and exposure / processing details are at:

http://jthommes.com/Astro/m31.htm

Lens was a Vivitar 180mm telephoto, camera was an Artemis285.

Total exposure was a relatively short 63 minutes.


November 12, 2005 03:23 PM Forum: CCD Imaging and Processing/Deep Sky

Andromeda Revisited

Posted By Jim Thommes
I had recently posted an M31 - thanks to all for the helpful comments - Warren K. especially. I corrected my error and I believe got better star color and eliminated a blue cast to the background. My red exposure data is usually somewhat intense - in my normal processing I usually attenuate it some and I did so here. So this image pretty much following my normal routine. Not the same level of red as in Warren's, but I am happier with it than my original.

I have attached a mid size image, but a full size image can be accessed at:

http://jthommes.com/Astro/m31.htm

The original image with the green channel error can still be accessed for comparison purposes at:

http://jthommes.com/Astro/images/M31_VivMogg_PS1GBSH.jpg


November 14, 2005 08:42 PM Forum: CCD Imaging and Processing/Deep Sky

California Nebula - RGB and HA

Posted By Jim Thommes
Ralph, Brian and Stuart have posted some excellent images on this object. I thought I would check in with a version I recently finished.

I have attached a mid size image; full size image and exposure / processing details are at:

http://jthommes.com/Astro/California%20Nebula.htm

Scope was my Megrez II at f/3.1; Camera was an Artemis285.

Exposure time 64 minutes Luminance and HA, 24 minutes color.

November 18, 2005 08:42 PM Forum: CCD Imaging and Processing/Deep Sky

Emission Nebula LBN 656

Posted By Jim Thommes
Here is an object part of the larger IC1805 complex known as the "Heart Nebula". I have attached a mid size image, a full size image and exposure / processing details are at:

http://jthommes.com/Astro/LBN656.htm

Scopes used were my C8 at f/3.1 and Megrez at f/6.25, Camera was an Artemis285.

Total exposure - 94 minutes. A full field "Heart" is on its way...

November 20, 2005 06:31 PM Forum: CCD Imaging and Processing/Deep Sky

IC 1805 - Heart Nebula

Posted By Jim Thommes
I have completed a full wide field image of the Heart. This was made with a Vivitar 180mm SLR lens. I have attached a mid size image, but a full size image and exposure / processing details can be accessed at:

http://jthommes.com/Astro/IC1805.htm

Optics were a 180mm SLR lens at f/3.5. Camera was an Artemis285.

A relatively short exposure time...
HA:R:G:B 40:12:12:12

The lower portion image (LBN 656 - previously posted) can be accessed here:

http://jthommes.com/Astro/LBN656.htm

November 26, 2005 04:02 PM Forum: CCD Imaging and Processing/Deep Sky

Flaming Star HA-RGB

Posted By Jim Thommes
Here is one I shot November 5, 2005. The green and blue exposures had a lot of data in them - that surprised me. So the nebula colors have more than the usual red. I left the nebula a bit pinkish. Anyway, I attached a mid size image, a full size image is at:

http://jthommes.com/Astro/flamingstar.htm

Scope was my C8 at f/3.1, camera was my Artemis285

HA:L:R:G:B 48:16:9:9:9

December 2, 2005 03:46 PM Forum: CCD Imaging and Processing/Deep Sky

IC 410 HaRGB

Posted By Jim Thommes
Here is an image of IC 410 near the Flaming Star nebula in Auriga. I have attached a mid size image. A full size image as well as exposure and processing details can be accessed at:

http://jthommes.com/Astro/ic410.htm

Scope was a combined effort of my C8 at f/3.1 and my Megrez II at f/6.25, Camera was my Art285. Ha:L:R:G:B - 35:24:10:10:10


Just for grins, earlier versions of images I made of this object are here:

2004:
http://jthommes.com/MiscAstro/Archives/ic410.htm

2003:
http://jthommes.com/MiscAstro/Archives/ic410b.htm

Sorry they are not all the same orientation.

Funding Member

Telescopes, Astronomy, Binoculars

Sponsors


View all sponsors

Search