NGC 7793—A Flocculent Spiral Galaxy

[Russ.Carpenter]

This text and image were uploaded to Astrobin this morning. https://www.astrobin.com/v7jmh4/?nc=user As usual, the full size version in Astrobin is a lot better than the compressed version in this posting.

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NGC 7793—A Flocculent Spiral Galaxy

What is a flocculent galaxy? It’s a type of spiral galaxy, but flocculents are patchy, with discontinuous spiral arms. Self-propagating star formation creates the messy structure of flocculent spirals. Approximately 30% of spirals are flocculent, 10% are grand design, and the rest are referred to as "multi-armed".

NGC 7793 is well known for a powerful micro quasar in one of arms. It is unusual to find a quasar in the arm of a galaxy, rather than its core.

This is an RGB image, processed with a synthetic luminance.

Tech Notes for ASA 500/3.6:
ASA Newtonian, 500 mm aperture, 1900mm focal length, F3.6
FLI Proline 16803, 9 mm pixel, 4096 X 4096
ASA DDM85 equatorial mount
Processing with PixInsight, StarTools, and Affinity Photo

[shaun_slade]

Bravo, the depth of this image is breath taking. If I was being picky, perhaps a little residual green to remove?