Messier 2

Messier 2
Messier 2
	Messier 2 by Hubble Space Telescope; 2.5′ view
Observation data (J2000 epoch)
Class	II
Constellation	Aquarius
Right ascension	21h 33m 27.02s
Declination	–00° 49′ 23.7″
Distance	55,000 ly (17 kpc)
Apparent magnitude (V)	6.5
Apparent dimensions (V)	16.0′
Physical characteristics
Mass	1.04×105 M☉
Radius	87.3 ly
Metallicity	= –1.65 dex
Estimated age	12.5 Gyr
Other designations	NGC 7089
	See also: Globular cluster, List of globular clusters

Messier 2 or M2 (also designated NGC 7089) is a globular cluster in the constellation Aquarius, five degrees north of the star Beta Aquarii. It was discovered by Jean-Dominique Maraldi in 1746, and is one of the largest known globular clusters.

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