Omega Centauri is one of the most photographed objects in the southern sky, but I wanted to see what was really hiding in the background beyond the usual RGB presentation.

This is a deep HaLRGB integration aimed at revealing the extremely faint Hydrogen Alpha glow and subtle traces of IFN in the field. The Ha signal here is exceptionally dim and sits right on the edge of detectability, so it took 24 hours of exposure and careful processing to bring it up without overpowering the cluster.

To my knowledge, very few true deep HaLRGB images of NGC 5139 have been published, and Mauricio Christiano de Souza’s is the only other one here on Astrobin. Some noise reduction and a conservative Ha blend were essential, and I’ve tried to keep the result as faithful as possible to what the data revealed after stretching.

I hope this encourages others to go deeper on objects we think we already know. Omega Centauri is not just a globular cluster; it’s sitting in a much richer and more delicate environment than most images ever show.

Thanks again to my buddy Blue for assistance with data collection at our remote observatory in rural Victoria, Australia.

There is also an abundance of tiny galaxies in this field, so please enjoy viewing at high resolution and playing ‘Where’s Wally’, galaxy-style, finding them all! 😀

CS
Andy

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