Celestial hemisphere:  Northern  ·  Constellation: Triangulum (Tri)  ·  Contains:  M 33  ·  NGC 595  ·  NGC 598  ·  NGC 604  ·  Triangulum Galaxy  ·  Triangulum Pinwheel
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M33 (Triangulum Galaxy) in Hydrogen-Alpha with stars, Derek Spratt
M33 (Triangulum Galaxy) in Hydrogen-Alpha with stars
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M33 (Triangulum Galaxy) in Hydrogen-Alpha with stars

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M33 (Triangulum Galaxy) in Hydrogen-Alpha with stars, Derek Spratt
M33 (Triangulum Galaxy) in Hydrogen-Alpha with stars
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M33 (Triangulum Galaxy) in Hydrogen-Alpha with stars

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Description

Bortle 4 and 7 skies - I also took a massive amount of LRGB subs of M33 but the result was not exceptional - only the Ha looked like a quality result. I am using a CDK17 to complete a hi-res mosaic of M33 so won't pursue my RC8 version any further.

M33 is really interesting in Ha alone - some intense lumpy regions where active star forming is ocurring. This got me to revisit my M31 Ha data and publish an Ha only version to compare our 2 closest large galaxies - they couldn't be more different ...

M33 in Ha with stars:  https://www.astrobin.com/418i2y/
M33 in Ha no stars: https://www.astrobin.com/b9cmu5/B/
M31 in Ha with stars: https://www.astrobin.com/acz076/
M31 in Ha no stars: https://www.astrobin.com/5lgtk9/

M33 mosaic using a CDK17: https://www.astrobin.com/y6h9xx/B/

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M33 (Triangulum Galaxy) in Hydrogen-Alpha with stars, Derek Spratt