M3 at f10 8" SCT with Altair 183C Hypercam (Tom Gray)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: M 3 · NGC 5272

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M3 at f10 8" SCT with Altair 183C Hypercam

Revision title: Without ringing artifacts

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M3 at f10 8" SCT with Altair 183C Hypercam

Revision title: Without ringing artifacts

My second attempt at M3 this year, using short, unguided, 15s exposures, has produced a much better image; I am happy with the colour saturation and overall resolution, although it was a hazy, and at times cloudy, night. 40m data has started to show off the majesty of this ancient cluster.

M3 lies 36,000 LY away in the ‘hunting dogs’, and is one of the brightest globular clusters, with 500,000 stars, and ‘younger’ than many at a mere 8 billion years old!

Data were calibrated, aligned and stacked in ASTAP, Han Klein's excellent free astrometric stacking program, with 30 darks and 30 flats, before processing in Startools using a standard workflow.

Original
Final
B

B

Title: Without ringing artifacts

Description: Minimal processing with a little deconvolution (Trujillo Moffatt atmosphere algorithm) and noise reduction.

Uploaded: ...

The OSC Club (One Shot Camera)
Schmidt-Cassegrain Telescope (SCT) Imagers
Altair Astro 183 M/C Hypercams
UK Astro-Imaging
Messier Objects

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Status	Advanced success
Started	...
Astrometry.net job	5821386
PixInsight job	OO2EWM11MVXYMPS75UOC6BC3GTL2HXOA
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h42m14s.558
RA (top/left)	13h43m01s.623
RA (top/right)	13h41m24s.671
RA (bottom/right)	13h41m27s.563
RA (bottom/left)	13h43m04s.376

Dec (center)	+28°22′24″.88
Dec (top/left)	+28°30′28″.64
Dec (top/right)	+28°29′37″.90
Dec (bottom/right)	+28°14′23″.92
Dec (bottom/left)	+28°15′14″.42

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M3 at f10 8" SCT with Altair 183C Hypercam

Revision title: Without ringing artifacts

M3 at f10 8" SCT with Altair 183C Hypercam

Revision title: Without ringing artifacts

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M3 at f10 8" SCT with Altair 183C Hypercam

Revision title: Without ringing artifacts

M3 at f10 8" SCT with Altair 183C Hypercam

Revision title: Without ringing artifacts

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