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... М1 < М2 > М3 ...

Globular star cluster M2

Der Nebel, Supernova-Überrest M2 is in the constellation Aquarius (Aqr).

M2

Equatorial coordinates (epoch J2000):
Ra (α):21h33.5m, Dec (δ):-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. At this time, the object is at midnight near its highest point in the sky, that is, it is less affected by light from the lanterns and atmospheric distortions.

M1
Мessier 1
M3
Мessier 3

Nikolay Kurdyapin, astro-map.com  
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