Ghost Nebula
Oct 25, 2022 17:45:42 #
I saw this image in Stellarium and thought this would be a great image to capture, but no, it was just too faint to obtain a good image. I took 45 images at 5 minutes per image on an eight inch RC telescope. I used a CEM 40 mount with the ASIAIR Plus doing all the heavy lifting. I was impressed because the guiding was about .25 pixels! I found a new attachment point for the guide scope. I threw away the ST-4 cable and tied the guide scope camera, a ZWO 120 MC, directly the the ASIAIR red box. Great guiding, but the image was not that good. I stacked 45 images in Deep Sky Stacker and post-processed them in Gimp. I really stink at this, too! Well, I tried, but I was extremely satisfied with the way the mount performed. The area I was in was a Bortle 3 sky. The location was about 50 miles Southwest of Las Vegas nestled in a valley surrounded by ridges. Really isolated here! I will return there, soon. Anyone who wants to go along, PM me. Always like company. Well to the image itself. Please have mercy. RFB
Oct 25, 2022 21:20:17 #
Ballard
Loc: Grass Valley, California
Railfan_Bill wrote:
I saw this image in Stellarium and thought this wo... (show quote)
Your guiding was bang on, looks like the ASIAIR red box works great. I normally use an offaxis guider with a guide camera and use a laptop running PHD for guiding. On decent nights I get .5 arc second guiding, on really good nights it can be .25 arc second guiding.
I have found that some objects require a lot of exposure time, on my shot of NGC 660 I had over 24 hours of exposure counting, luminance, red, green, blue and HA subframes (done over 5 nights) in the Bortle 4 skies where I live. See
https://www.uglyhedgehog.com/t-755331-1.html
Oct 28, 2022 02:14:50 #
Railfan_Bill wrote:
I saw this image in Stellarium and thought this wo... (show quote)
Hi Bill. Nice image. I am surprised that not more nebula showed up given the exposure time. I am willing to take a look at your data (stacked or unstacked) if you like?
Oct 31, 2022 14:47:11 #
Hi Marc, By all means you can see if this would come out better than what I did. All I ask is that you tell me the workflow and what software you used. I tried to send the stacked image, but the file was too big. RFB
Nov 1, 2022 03:32:34 #
Railfan_Bill wrote:
Hi Marc, By all means you can see if this would come out better than what I did. All I ask is that you tell me the workflow and what software you used. I tried to send the stacked image, but the file was too big. RFB
Hi Bill
I would be more than happy to take a look at the data & of course write my workflow.
How big is final stack? will it send via email? marceegee@tiscali.co.uk
Nov 2, 2022 18:12:20 #
Sorry, but the stack is too big for this forum. Thanks for the offer. RFB
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