Final touches on the Bubble

[Rodd]

A month of rain will cause one to do strange things.  I had completed an LRGB image of the Bubble Nebula with the C11Edhe native unguided with 30 sec exposures using the ASI 1600.  I think it came out pretty decent considering the short exposures, slow focal ratio (F10), and the fact that RGB nebulae are not the easiest of targets.  In my expanse of time with nothing to do, I thought about adding Ha to the image that I had collected some time ago using the TOA 130.  Registering the TOA Ha to the Celestron stacks took a lot of effort.  I finally got it to work after resizing the TOA image.  Unfortunately, though it might not matter, registration ended up being to the TOA stack--so I had to subsequently resize upward to achieve the framing.  It seemed to work OK--though I should have deconvolved the Ha stack prior to insertion,  It was just a quick experiment though, so I forged ahead to see what would happen.  This image was reprocessed from scratch.  I added about 25% of the Ha into the red channel, but I blended and mixed the image as I processed, so I do not really know how much Ha made it into the final cut.  The first image is the original LRGB, the second image contains Ha.  The image contains about 11 Hours of LRGB and 12 hours of Ha (well, 25% or so of that).  I like the palette of the RGB image better--I am becoming partial to broadband palettes.  But the Ha really adds to the signal strength of the nebula--revealing emissions not visible in the RGB image.  

 

LRGB

 

HaLRGB

 

 

[Rodd]

I spoke too soon (as usual).  I added more Ha from the TOA 130 to the image.

 

 

Edited October 31, 2021 by Rodd