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Contains:  M 3, M3, NGC 5272
Getting plate-solving status, please wait...

Globular Cluster M3 in Canes Venatici

Technical card

Dates:March 29, 2019

Baader B 1.25'' CCD Filter: 9x300" (gain: 53.00) -20C bin 1x1
Baader G 1.25'' CCD Filter: 9x300" (gain: 53.00) -20C bin 1x1
Baader L 1.25'' Filter: 21x300" (gain: 53.00) -20C bin 1x1
Baader R 1.25'' CCD Filter: 9x300" (gain: 53.00) -20C bin 1x1

Integration: 4.0 hours

Darks: ~37

Flats: ~21

Avg. Moon age: 23.33 days

Avg. Moon phase: 37.51% job: 2622064

RA center: 13h 42' 9"

DEC center: +28° 22' 41"

Pixel scale: 0.493 arcsec/pixel

Orientation: -54.558 degrees

Field radius: 0.446 degrees

Resolution: 5430x3589

Locations: Vockenroth, Neuhof, Bayern, Germany

Data source: Traveller


Object description (

Messier 3 (M3 or NGC 5272) is a globular cluster of stars in the northern constellation of Canes Venatici. It was discovered on May 3, 1764, and was the first Messier object to be discovered by Charles Messier himself. Messier originally mistook the object for a nebula without stars. This mistake was corrected after the stars were resolved by William Herschel around 1784. Since then, it has become one of the best-studied globular clusters. Identification of the cluster's unusually large variable star population was begun in 1913 by American astronomer Solon Irving Bailey and new variable members continue to be identified up through 2004.



Thomas Richter
License: None (All rights reserved)



Description: color correction


Description: higher dynamic and more intensive color

Sky plot

Sky plot


Globular Cluster M3 in Canes Venatici, 


            Thomas Richter