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Lion Nebula SH2-132 - RC71

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Posts Made By: Jim Thommes

February 7, 2006 05:36 AM Forum: CCD Imaging and Processing/Deep Sky

And yet another M42...

Posted By Jim Thommes
I am always challenged by this object. Here is this year's version. I have attached a mid size image. A full size version as well as exposure and processing details are at:

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

Scope was my Megrez II at f/5, Camera was my Artemis285. Exposure time was HA:L:R:G:B - 40:10:5:5:5

Also check out a recent image of globular cluster NGC1851 - very southerly at -40 DEC. So this was a bit of a challenge and almost out of my latitude's range...

http://jthommes.com/Astro/NGC1851.htm


February 12, 2006 12:03 AM Forum: CCD Imaging and Processing/Deep Sky

M78 - Less McNeil

Posted By Jim Thommes
This image of M78 shows that McNeil's nebula has faded now substantially. (it is not visible in this image.)

I have attached a mid size image, but you may want to look at the full size image since the mid size does not provide much of a view. Full size image and exposure, processing details are at:

http://jthommes.com/Astro/M78.htm

Scope was my Megrez II at f/5, Camera was my Artemis285. Time L:R:G:B 76:16:16:16

You can compare McNeil to an earlier image of 12 Nov, 2004 here:

http://jthommes.com/MiscAstro/Archives/M78.htm


February 19, 2006 12:02 AM Forum: CCD Imaging and Processing/Deep Sky

Seagull Nebula - HA-RGB

Posted By Jim Thommes
This is a two frame mosaic of the Seagull Nebula. This is somewhat compressed. Check out the full size image (and exposure / processing details) at:

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

Scope was Megrez II, camera was Artemis285
HA:R:G:B 84:16:16:16 combined exposure for bothe mosaic frames.

February 25, 2006 11:18 PM Forum: CCD Imaging and Processing/Deep Sky

Re: A reintroduction and a pic (Leo Triplet)

Posted By Jim Thommes
Daniel,
Welcome back, nice to see your post.

Tell us a little more about your equipment, exposure times, and processing. The image captures well the triplet - looks like it could benefit from more data (i.e longer exposure).


February 25, 2006 11:26 PM Forum: CCD Imaging and Processing/Deep Sky

NGC 2903

Posted By Jim Thommes
Here is NGC2903. I have attached a midsize image, but a full size image as well as exposure / processing details can be accessed at:

http://jthommes.com/Astro/ngc2903.htm

Done with C8 at f/8 and Art285 camera.
total time 112 minutes

March 10, 2006 04:30 AM Forum: CCD Imaging and Processing/Deep Sky

A couple of Messier Open Clusters

Posted By Jim Thommes
Nothing very special, but I like to do Open Clusters from time to time, so it looks like some of you will have to suffer through a few of them. I have attached a mid size image of M36. The links are to full size images with exposure and processing details.

M36 with the C8
http://jthommes.com/Astro/M36.htm

M48 with the Megrez II
http://jthommes.com/Astro/M48.htm

More on the way.

March 12, 2006 07:35 PM Forum: CCD Imaging and Processing/Deep Sky

Re: DSI II & Filters

Posted By Jim Thommes
Paul,
Regarding use of the filters, I think you need about 59 mm set back distance from the FR to the CCD. As you have indicated, you have no hope of getting that by using the nosepiece with the 1-1/4 visual back attached to the rear of the FR - its just too long.

However, you may be able to use a filter drawer (Astronomik makes one) that adds only 20-22 mm to the optical path and can replace a portion of the variable T-Adapter. You may have to uses some T-Thread rings of 5, 10 mm sizing to get the needed set back though.

The added benefit with the filter drawer is that you don't have to dimount the camera to change filters. Oh, and others make filter drawers besides Astronomik - I believe Atik does and SAC does.

March 12, 2006 07:44 PM Forum: CCD Imaging and Processing/Deep Sky

Thor's Helmet

Posted By Jim Thommes
I know I promised more open clusters, but I recently took exposure data on NGC2359. Seeing was pretty good and I thought the data came out pretty good too. So I wanted to see what final processing would look like and then post since this is late season for this object.

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

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

Scope was my C8 at f/4.8, Camera was my Art285. I usually expose on the short side time wise - in this case, exposure time was HA:L:R:G:B 56:24:16:16:16 - probably still somewhat short compared to what others are doing.

I'll get back to the Opens.

March 20, 2006 12:00 AM Forum: CCD Imaging and Processing/Deep Sky

Open Clusters

Posted By Jim Thommes
OK, So here are some of the Open Clusters I threatened. Nothing special. Again it's an enjoyable imaging outing for me from time to time - particularly if conditions don't allow more challenging subjects.

I have attached a mid size image of the NGC1807/NGC1817 pair. Full size images are at:

NGC1807-NGC1817:
http://jthommes.com/Astro/NGC1807-1817.htm

NGC1582:
http://jthommes.com/Astro/NGC1582.htm

The NGC1582 object is somewhat interesting because of its sort of semicircle shape.


March 26, 2006 07:48 PM Forum: CCD Imaging and Processing/Deep Sky

M88 and Friends

Posted By Jim Thommes
Here is an image from data earlier this month. In this field, there are two other small galaxies of Mag 16.6 and Mag 18.7 besides M88 itself.

Full sized image and details can be accessed at:

http://jthommes.com/Astro/M88.htm

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