Hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  3 Boo  ·  9 Boo  ·  IC 4283  ·  IC 4287  ·  IC 4297  ·  IC 4307  ·  IC 4322  ·  IC 4332  ·  IC 4334  ·  IC 4342  ·  IC 4343  ·  IC 4348  ·  IC 905  ·  IC 906  ·  IC 909  ·  IC 910  ·  IC 914  ·  IC 916  ·  IC 933  ·  IC 941  ·  IC 961  ·  M 3  ·  NGC 5157  ·  NGC 5166  ·  NGC 5187  ·  NGC 5251  ·  NGC 5259  ·  NGC 5263  ·  NGC 5271  ·  NGC 5272  ·  And 9 more.
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My first imaging attempt on a globular cluster - M3 @ 135mm, 



    
        

            Ian Dixon
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My first imaging attempt on a globular cluster - M3 @ 135mm

Getting plate-solving status, please wait...
My first imaging attempt on a globular cluster - M3 @ 135mm, 



    
        

            Ian Dixon
Powered byPixInsight

My first imaging attempt on a globular cluster - M3 @ 135mm

Imaging telescopes or lenses: rokinon 135mm f2.0

Imaging cameras: Canon 60D

Mounts: iOptron SkyGuider Pro

Software: Aries Productions Astro Pixel Processor APP  ·  SkySafari 6 Pro  ·  Adobe Photoshop CC 2020

Filters: Optolong CLS - CCD clip in

Accessory: Vanguard tripod Alta Pro 2+ model 263AB100  ·  Scopes n stuff DSLR red dot finder mounted on hotshoe  ·  generic 10 lb iron weight suspended on rope


Dates:April 23, 2020

Frames:
Optolong CLS - CCD clip in: 40x120" (1h 20') ISO800
Optolong CLS - CCD clip in: 10x180" (30') ISO800

Integration: 1h 50'

Darks: 20

Flats: 20

Bias: 20

Avg. Moon age: 0.35 days

Avg. Moon phase: 0.14%

Bortle Dark-Sky Scale: 3.00

Temperature: 8.00


RA center: 13h41m51s.752

DEC center: +27°5621.33

Pixel scale: 6.833 arcsec/pixel

Orientation: -89.328 degrees

Field radius: 5.964 degrees

More info:Open 


Resolution: 5201x3537

Data source: Own remote observatory

Remote source: Non-commercial independent facility

Description

"Messier 3, in the constellation Canes Venatici, is one of the three brightest globular clusters in the northern sky. It lies on the border of Canes Venatici with Bootes, about 6° NNE of Beta Comae Berenices. Messier 3 is one of the most beautiful and easily seen globulars. With an apparent magnitude of 6.2, it is visible to the naked eye under dark conditions - and a superb object with the slightest optical aid. In binoculars, it appears as a hazy, nebulous patch. A 4-inch telescope shows a bright compact core within a round and mottled, grainy glow, which fades slowly and uniformly to the outer edges." - text quoted from information listed in SkySafari 6

Our first nice day this spring and I left for the farm - a 50 km drive south of the city. I set up at dusk and began taking images at around 10:30 pm. It was an unbelievable +17C on this clear day, and I was excited to get out under the skies sans ice fishing gear and heavy boots to try my luck at M3. As usual, spring arrives like a falling piano in the prairies. The deer in our field regarded me with curiousity and the Canada geese, mallard ducks and sundry kept up their cacophony far into the evening as they swam in the flooded creek beside my "base camp".

M3 reminded me of how challenging finding a DSO can be without the aid of goto etc. M3 is rather isolated, I spent about 30 minutes fiddling with my framing, by guessing at altitude between Arcturus and Cor Caroli (just over a third of the way north of Arcturus) and then triangulating with Arcturus and Murpid. Then I would finalize by taking a 10 second image with the intervalometer, judge my position, tweak, and try again.

I stopped down the lens to f3-ish. This series of images was taken unguided.

This is my first imaged globular cluster. I hope you enjoy it.

Thanks for looking!

Kind regards,

Ian

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            Ian Dixon
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My first imaging attempt on a globular cluster - M3 @ 135mm, 



    
        

            Ian Dixon

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