Ghost of Cassiopeia in HST palette

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  • Member since
    February, 2008
Ghost of Cassiopeia in HST palette
Posted by GordonH on Wednesday, December 11, 2013 4:24 AM

This subject is very rarely imaged in the full narrow band palette as there is virtually no OIII and little SII compared to the Ha. It is more common to image it in LRGB or HaLRGB combined. I have done the latter but I wanted to see if there was anything that could be done with just the traditional narrow band filters. The OIII signal is so weak that it has to be stretched just to be able to see it. But, it is there, it just requires enough data and time and patience to tease it out. This is a total of almost 15 hours exposure time with 4.5 hours Ha and 5 hours each of OIII and SII and it has taken me three goes at processing before I was happy with the result. It was taken with the Televue NP127is/FLI-Atlas-Centreline-PL16803 prototype imaging system that I am testing. This is a crop of the full image to show the detail better and make the image size easier to post. The full size image can be seen at the following link
Thanks for looking
Best wishes

Currently using a Tele Vue NP127/FLI (Atlas/Centreline/PL16803) prototype imaging system. Paramount ME. OS Falco guide scope and SX lodestar.

  • Member since
    March, 2009
Posted by pastorg on Wednesday, December 11, 2013 10:53 PM

Beautiful image Gordon!  :)

Zhumell Z12 Dob, Celestron Omni XLT 102mm refractor on CG-4 Mount,  Meade AZ70 refractor, Celestron Ultima 2X Barlow 1.25, Telrad with 4 3/8 Riser, Zhumell Skyglow Filter, Zhumell OIII Filter, Baader UHC-S Filter, Meade ND96 Moon Filter, Baader Planetarium Hyperion 21mm, 13mm, 8mm and 5mm eyepieces, Meade 9mm and 25mm Plossls, Zhumell 9mm Plossl and 2 inch 30mm SWA,  6mm Orion Expanse and Pentax 10 x 50 PCF WP ll Binos

  • Member since
    September, 2011
Posted by RayM0506 on Saturday, January 04, 2014 10:15 AM

Wow!!  Very detailed! Fantastic work!

Celestron 8 SCT F/10 to 7.5 to 6.3-C-GEM Mount-Starizona Power Pack II+-Bahatinov Focus Mask-Canon 60Da-Nexguide Auto Guider-Orion Short Tube 80mm Guide Scope- Baader Planetarium UHC-S/L-Booster visual/photographic 2"-Capture Software Backyard EOS-Deep Sky Stacker-Adobe Photoshop/Registax 6 for post work

  • Member since
    July, 2003
  • From: Eastern SD.
Posted by johnjohnson on Saturday, January 04, 2014 12:50 PM

Outstanding work you do Gordon. Where do you image from by the way? Seems from past posts you have some incredible skies at your imaging site.


20" F5 Obsession, OMI mirror .987 Strehl. 10" F4.7 reflector. 6" F5 ST reflector. 120mm F7.5 EON. 80mm F11.3 guide scope. SkyWatcher EQ-6 Hyper Tuned.   Flicker Astro Site   More Astro Images

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