Hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  M 3  ·  NGC 5272
M 3, 



    
        

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M 3
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M 3

Technical card

Imaging telescopes or lenses: 8" SCT GT Series Celestron

Imaging cameras: 40D Canon

Mounts: CG5 Equatorial Celestron

Guiding telescopes or lenses: 80 mm Short Tube Refractor - Auto Guiding Orion

Guiding cameras: Star Shooter Autoguider Orion

Focal reducers: 6.3 Focal reducer Celestron

Software: 3.3.3 Beta 47, 3.82 and CS3 Deep Sky Stacker, Image Plus, Photoshop & Noel's Tools,


Dates:June 18, 2012

Frames:
10x60" (10') ISO1600
5x40" (3' 20") ISO3200
10x90" (15') ISO800

Integration: 28' 20"

Avg. Moon age: 28.51 days

Avg. Moon phase: 1.18%

Bortle Dark-Sky Scale: 5.00


Basic astrometry details

Astrometry.net job: 116284

RA center: 13h42m09s.6

DEC center: +28°2244

Pixel scale: 1.748 arcsec/pixel

Orientation: -159.803 degrees

Field radius: 0.416 degrees


Resolution: 620x425

Description

M 3 (also known as NGC 5272) is a globular cluster of stars in the northern constellation Canes Venatici. This cluster is one of the largest and brightest, and is made up of aaround 500,000 stars. It is estimated to be 8 million years old. It is located at a distance of about 33,900 light years away from earth. It was discovered by Charles Messier on May 3, 1764, and resolved into stars by William Herschel around 1784.

M3 is easily seen in small telescopes and binoculars.

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M 3, 



    
        

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