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... М1 < М2 > М3 ...

Globular star cluster M2

Globular star cluster M2 is in the constellation Aquarius (Aqr).


Equatorial coordinates (epoch J2000):
Ra 21h33.5m, Dec -00° 49'

Visual magnitude: 6,3m
Distance from the star clusters M2 to the Sun is 40850 light years
Angular size: 16'
Class: II
External dimensions the star clusters M2 are about 190 light years.
Estimated weight the star clusters: 900x103 suns

Discoverer: Giovanni Domenico Maraldi, 1746 year.

The designation M2 in other catalogs: NGC 7089

Optimum magnification for a telescope with observations of M2, depending on the aperture of the telescope (D), is about D/2-D. Higher magnifications of course add details, but lead to a strong drop in the brightness of the image, making it difficult to observe.
The best month for observing M2 is September.

Nikolay Kurdyapin, astro-map.com  
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