Tadpoles in Space!


IC410_A

IC410 is an emission nebula in the constellation Auriga, and best known for the two little squiggly shapes that look like tadpoles.  It’s an interesting target at various degrees of magnification.  At very high magnification (and better atmospheric conditions than I ever see here) you can frame just the tadpoles.  A slightly wider view would include most of the surrounding nebulosity.  This view is a bit wider yet, to include some of the extended nebulosity below and to the right of the main portion.  A very wide view could include several other nebulas (see https://wa-chur-ed.com/ic405-410-and-417/).

I captured this image in April of this year, but didn’t finish processing it until now.  Part of the reason it took a lot of time is that I couldn’t find the right way to present the color.  As is always the case with narrowband images, to show all the different bands (from different elements), you have to use “false color”.  In this case I ultimately decided to mix the separate images to approximate the correct colors, with just a little yellow added for the sulfur channel.

To maximize the contrast between the three elements I normally use a process that results in red or gold plus cyan.  That technique works OK for this image and does yield more contrast, but it just didn’t look right to me:

IC410

Perhaps it’s just because I’ve seen this color scheme too many times.  But either way, there really isn’t a lot of variation in color with these emission nebulae.  In most cases there is far more hydrogen than any other element, so they really just look red.  We “tweak” the images to either reveal more details or to make a more pleasing image.  Hopefully, you will find it pleasing also.

 


About Greg Marshall

I am a retired electronics engineer and after a few months of enjoying my leisure I began to miss doing product development. My astronomy hobby always needed new solutions to unique problems, so I decided that whenever I came up with a good solution I would try to make it available to others.

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