M3 - Canes Venatici (LRGB Samyang 135mm lens) (Crop) (Reprocessed in Siril - 'night and day') (Tom Gray)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: HD118507 · HD118658 · HD118743 · HD118905 · HD119025 · HD119081 · HD119391 · HD119477 · HD119686 · HD119748 · HD119944 · HD120007 · HD120049 · HD120364 · HD120421 · IC 4307 · M 3 · NGC 5251 · NGC 5263 · NGC 5271 · NGC 5272 · NGC 5274 · NGC 5275 · NGC 5277 · NGC 5280 · NGC 5282 · NGC 5287

M3 - Canes Venatici (LRGB Samyang 135mm lens) (Crop) (Reprocessed in Siril - 'night and day')

A series of shorter exposures whilst up in the North-East, using my travel rig. Currently DSI3 pro mono CCD camera with Altair filter slide and Samyang 135mm lens stopped down to f2.6.

At around 34,000 LY from earth, and thought to contain 500,000 stars, this 8 bn year old globular is one of the largest and contains a number of variable stars. It also has a population of blue ‘stragglers’ and a number red giant stars, which are more obvious in my image.

Pre-processed in Siril, with back ground removal using GradXpert, sharpening using Deep Sky detail and final noise reduction. I used Fitswork 4 to resize the cropped image in the mouseover.

Thanks to generous feedback from Astrobin friends, I have completely reprocessed this with better background extraction, smoothing and recomposition. This is native resolution, improving the SNR.

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Title: Crop

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Messier Objects
UK Astro-Imaging
Camera Lens Astrophotography
Sky-Watcher Star Adventurer
Altair Astro 183 M/C Hypercams

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Status	Advanced success
Started	...
Astrometry.net job	9660322
PixInsight job	XLC6SJSEH4VS3F2E0NVFDSRYRACV106R
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h42m44s.7
RA (top/left)	13h36m42s.4
RA (top/right)	13h36m14s.9
RA (bottom/right)	13h48m33s.9
RA (bottom/left)	13h49m27s.10

Dec (center)	+28°21′03″
Dec (top/left)	+30°17′27″
Dec (top/right)	+26°30′22″
Dec (bottom/right)	+26°23′55″
Dec (bottom/left)	+30°10′55″

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M3 - Canes Venatici (LRGB Samyang 135mm lens) (Crop) (Reprocessed in Siril - 'night and day')

M3 - Canes Venatici (LRGB Samyang 135mm lens) (Crop) (Reprocessed in Siril - 'night and day')

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M3 - Canes Venatici (LRGB Samyang 135mm lens) (Crop) (Reprocessed in Siril - 'night and day')

M3 - Canes Venatici (LRGB Samyang 135mm lens) (Crop) (Reprocessed in Siril - 'night and day')

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