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M3

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About this observation
Observer
Ian Rothwell
Time of observation
25/02/2018 - 03:22
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Messier 3  is a globular cluster of stars in the northern constellation of Canes Venatici. It was discovered by Charles Messier on May 3, 1764, and resolved into stars by William Herschel around 1784. 

Observation data (J2000 epoch)

Constellation: Canes Venatici

Right ascension: 13h 42m 11.62s

Declination: +28° 22′ 38.2″

Distance: 33.9 kly (10.4 kpc)

Apparent magnitude (V): +6.2

Apparent dimensions (V): 18′.0

Physical characteristics

Mass: 4.5×105M☉

Radius: 90 ly

Other designations: NGC 5272[4]

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