This is another one I captured back in November, but am just now getting to process. I like shooting this galaxy as it is quite bright and fits in my current field of view pretty well.
It is 2.7 million light years from earth and part of our local galaxy group (also includes our own Milky Way and Andromeda galaxies). It is 60,000 light years across. It’s also interesting as data captured in Ha narrowband reveals similar star forming regions to our own galaxy, but with a unique perspective from outside looking in.
I captured this in RGB with an additional Ha layer mixed in as additional red. The component channels are shown below:
The imaging session details are below:
To do the HaRGB combination, I first created the RGB with pixel math and made some adjustments before later adding the Ha channel into Red. The initial RGB image is shown below:
The next step was to layer in the Ha channel using the PixInsight script for NBRGBCombination. After combining and doing some additional contrast boost and saturation enhancements, I did a final crop. The final image is below:
For comparison, here is a similar framing I shot about a year ago using Canon T3i DSLR: