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M3 - Another Glob Comparison


iksose7

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Had a couple clear nights early this week and M3 was in the perfect position for imagingarrow-10x10.png. This is the secondarrow-10x10.png glob i have imagedarrow-10x10.png, my first was M13 which i imagedarrow-10x10.png in July last year as first light for my scope. I thought it would be interesting to compare the two, first light vs latest light. Its great to see that i am making progress in this hobby, especially regarding processing which i now think is the most important part of astrophotgraphy.

So heres M3, used a drizzle stack in PI and deconvolution to gain some resolution back, the imagearrow-10x10.png had to be cropped quite a bit to avoid a bright star with a halo, something i am being plagued by at the moment, i may have fixed it now though.

17059196920_30d49a6881_b.jpg

Exposure Details:
126*300sec, f7, ISO 800
Total Exposure: 10.5 hours
Imagedarrow-10x10.png over 2 nights: 20th, 21st April
Scope: Altair Astro 115EDT
Cameraarrow-10x10.png: Canonarrow-10x10.png 600Da
Mount: NEQ6
M13 was imagedarrow-10x10.png with the exact same gear but using shorter exposures
14689528411_eec0c05c8c_b.jpg
And as usual, a bit of info about M3 if you are interested in that sort of thing!
Messier 3 is a globular cluster made up of around half a million stars foundarrow-10x10.png in the constellation Canes Venatici. This type of cluster acts like a satellite to its parent galaxyarrow-10x10.png, orbiting above the galactic plane rather than being located in the galaxy'sarrow-10x10.png disk like the less dense open clusters. Clusters like this are common, M3 is one of about 150 globular clusters that belong to the Milky Way galaxyarrow-10x10.png, not many compared to the amount that belong to some galaxiesarrow-10x10.png, there are over 13,000 globular clusters orbiting the supergiant elliptical galaxy M87 for example. Messier 3 is thought to be around 8 billion years old, but like all globs, how they form exactly is still unknown.
Callum
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Cheers guys, i am pleased with how its turned out. Its funny looking back on old images, i was well chuffed with my effort at M13 last year but looking at it now i can see everything thats wrong with it, hopefully it will be the same looking back on M3 this time next year!

Heres a single sub JPEG to get an idea of the crop:

gallery_26473_2703_629568.jpg

Callum

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